Merge branch 'release/0.8.5'v0.8.5

121 files changed, 25774 insertions, 16 deletions

diff --git a/.gitignore b/.gitignore
index 7b0b8c5..b99b85a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -17,3 +17,4 @@ profile
 
 # vi noise
 *.swp
+docs/_build/*
\ No newline at end of file
diff --git a/HISTORY.rst b/HISTORY.rst
index 787308c..4bbf180 100644
--- a/HISTORY.rst
+++ b/HISTORY.rst
@@ -1,6 +1,13 @@
 History
 =======
 
+0.8.5 (2010-10-06)
+------------------
+
+* New import system. All dependencies attempt to load from site-packages,
+  then fallback on vendorized modules.
+
+
 0.8.4 (2010-10-04)
 ------------------
 
diff --git a/NOTICE b/NOTICE
new file mode 100644
index 0000000..f072112
--- /dev/null
+++ b/NOTICE
@@ -0,0 +1,136 @@
+Tablib includes some vendorized python libraries: pyyaml, simplejson, and xlwt.
+
+
+
+PyYAML License
+==============
+
+Copyright (c) 2006 Kirill Simonov
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+of the Software, and to permit persons to whom the Software is furnished to do
+so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
+
+
+SimpleJSON License
+==================
+
+Copyright (c) 2006 Bob Ippolito
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+of the Software, and to permit persons to whom the Software is furnished to do
+so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
+
+
+
+XLWT License
+============
+
+Portions copyright © 2007, Stephen John Machin, Lingfo Pty Ltd
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer. 
+
+2. Redistributions in binary form must reproduce the above copyright notice,
+this list of conditions and the following disclaimer in the documentation
+and/or other materials provided with the distribution. 
+
+3. None of the names of Stephen John Machin, Lingfo Pty Ltd and any
+contributors may be used to endorse or promote products derived from this
+software without specific prior written permission. 
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+THE POSSIBILITY OF SUCH DAMAGE.
+"""
+
+"""
+  Copyright (C) 2005 Roman V. Kiseliov
+  All rights reserved.
+ 
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions
+  are met:
+ 
+  1. Redistributions of source code must retain the above copyright
+     notice, this list of conditions and the following disclaimer.
+ 
+  2. Redistributions in binary form must reproduce the above copyright
+     notice, this list of conditions and the following disclaimer in
+     the documentation and/or other materials provided with the
+     distribution.
+ 
+  3. All advertising materials mentioning features or use of this
+     software must display the following acknowledgment:
+     "This product includes software developed by
+      Roman V. Kiseliov <roman@kiseliov.ru>."
+ 
+  4. Redistributions of any form whatsoever must retain the following
+     acknowledgment:
+     "This product includes software developed by
+      Roman V. Kiseliov <roman@kiseliov.ru>."
+ 
+  THIS SOFTWARE IS PROVIDED BY Roman V. Kiseliov ``AS IS'' AND ANY
+  EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+  PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL Roman V. Kiseliov OR
+  ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+  NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+  STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+  OF THE POSSIBILITY OF SUCH DAMAGE.
+
+Roman V. Kiseliov
+Russia
+Kursk
+Libknecht St., 4
+
++7(0712)56-09-83
+
+<roman@kiseliov.ru>
+Subject: pyExcelerator
\ No newline at end of file
diff --git a/README.rst b/README.rst
index df59abb..e626d41 100644
--- a/README.rst
+++ b/README.rst
@@ -150,7 +150,7 @@ CSV
 +++
 ::
 
-	>>> data.yaml = 'age, first_name, last_name\n90, John, Adams'
+	>>> data.csv = 'age, first_name, last_name\n90, John, Adams'
 	>>> print data[0]
 	('John', 'Adams', 90)
 	
diff --git a/docs/Makefile b/docs/Makefile
new file mode 100644
index 0000000..9d5fd7e
--- /dev/null
+++ b/docs/Makefile
@@ -0,0 +1,130 @@
+# Makefile for Sphinx documentation
+#
+
+# You can set these variables from the command line.
+SPHINXOPTS    =
+SPHINXBUILD   = sphinx-build
+PAPER         =
+BUILDDIR      = _build
+
+# Internal variables.
+PAPEROPT_a4     = -D latex_paper_size=a4
+PAPEROPT_letter = -D latex_paper_size=letter
+ALLSPHINXOPTS   = -d $(BUILDDIR)/doctrees $(PAPEROPT_$(PAPER)) $(SPHINXOPTS) .
+
+.PHONY: help clean html dirhtml singlehtml pickle json htmlhelp qthelp devhelp epub latex latexpdf text man changes linkcheck doctest
+
+help:
+	@echo "Please use \`make <target>' where <target> is one of"
+	@echo "  html       to make standalone HTML files"
+	@echo "  dirhtml    to make HTML files named index.html in directories"
+	@echo "  singlehtml to make a single large HTML file"
+	@echo "  pickle     to make pickle files"
+	@echo "  json       to make JSON files"
+	@echo "  htmlhelp   to make HTML files and a HTML help project"
+	@echo "  qthelp     to make HTML files and a qthelp project"
+	@echo "  devhelp    to make HTML files and a Devhelp project"
+	@echo "  epub       to make an epub"
+	@echo "  latex      to make LaTeX files, you can set PAPER=a4 or PAPER=letter"
+	@echo "  latexpdf   to make LaTeX files and run them through pdflatex"
+	@echo "  text       to make text files"
+	@echo "  man        to make manual pages"
+	@echo "  changes    to make an overview of all changed/added/deprecated items"
+	@echo "  linkcheck  to check all external links for integrity"
+	@echo "  doctest    to run all doctests embedded in the documentation (if enabled)"
+
+clean:
+	-rm -rf $(BUILDDIR)/*
+
+html:
+	$(SPHINXBUILD) -b html $(ALLSPHINXOPTS) $(BUILDDIR)/html
+	@echo
+	@echo "Build finished. The HTML pages are in $(BUILDDIR)/html."
+
+dirhtml:
+	$(SPHINXBUILD) -b dirhtml $(ALLSPHINXOPTS) $(BUILDDIR)/dirhtml
+	@echo
+	@echo "Build finished. The HTML pages are in $(BUILDDIR)/dirhtml."
+
+singlehtml:
+	$(SPHINXBUILD) -b singlehtml $(ALLSPHINXOPTS) $(BUILDDIR)/singlehtml
+	@echo
+	@echo "Build finished. The HTML page is in $(BUILDDIR)/singlehtml."
+
+pickle:
+	$(SPHINXBUILD) -b pickle $(ALLSPHINXOPTS) $(BUILDDIR)/pickle
+	@echo
+	@echo "Build finished; now you can process the pickle files."
+
+json:
+	$(SPHINXBUILD) -b json $(ALLSPHINXOPTS) $(BUILDDIR)/json
+	@echo
+	@echo "Build finished; now you can process the JSON files."
+
+htmlhelp:
+	$(SPHINXBUILD) -b htmlhelp $(ALLSPHINXOPTS) $(BUILDDIR)/htmlhelp
+	@echo
+	@echo "Build finished; now you can run HTML Help Workshop with the" \
+	      ".hhp project file in $(BUILDDIR)/htmlhelp."
+
+qthelp:
+	$(SPHINXBUILD) -b qthelp $(ALLSPHINXOPTS) $(BUILDDIR)/qthelp
+	@echo
+	@echo "Build finished; now you can run "qcollectiongenerator" with the" \
+	      ".qhcp project file in $(BUILDDIR)/qthelp, like this:"
+	@echo "# qcollectiongenerator $(BUILDDIR)/qthelp/Tablib.qhcp"
+	@echo "To view the help file:"
+	@echo "# assistant -collectionFile $(BUILDDIR)/qthelp/Tablib.qhc"
+
+devhelp:
+	$(SPHINXBUILD) -b devhelp $(ALLSPHINXOPTS) $(BUILDDIR)/devhelp
+	@echo
+	@echo "Build finished."
+	@echo "To view the help file:"
+	@echo "# mkdir -p $$HOME/.local/share/devhelp/Tablib"
+	@echo "# ln -s $(BUILDDIR)/devhelp $$HOME/.local/share/devhelp/Tablib"
+	@echo "# devhelp"
+
+epub:
+	$(SPHINXBUILD) -b epub $(ALLSPHINXOPTS) $(BUILDDIR)/epub
+	@echo
+	@echo "Build finished. The epub file is in $(BUILDDIR)/epub."
+
+latex:
+	$(SPHINXBUILD) -b latex $(ALLSPHINXOPTS) $(BUILDDIR)/latex
+	@echo
+	@echo "Build finished; the LaTeX files are in $(BUILDDIR)/latex."
+	@echo "Run \`make' in that directory to run these through (pdf)latex" \
+	      "(use \`make latexpdf' here to do that automatically)."
+
+latexpdf:
+	$(SPHINXBUILD) -b latex $(ALLSPHINXOPTS) $(BUILDDIR)/latex
+	@echo "Running LaTeX files through pdflatex..."
+	make -C $(BUILDDIR)/latex all-pdf
+	@echo "pdflatex finished; the PDF files are in $(BUILDDIR)/latex."
+
+text:
+	$(SPHINXBUILD) -b text $(ALLSPHINXOPTS) $(BUILDDIR)/text
+	@echo
+	@echo "Build finished. The text files are in $(BUILDDIR)/text."
+
+man:
+	$(SPHINXBUILD) -b man $(ALLSPHINXOPTS) $(BUILDDIR)/man
+	@echo
+	@echo "Build finished. The manual pages are in $(BUILDDIR)/man."
+
+changes:
+	$(SPHINXBUILD) -b changes $(ALLSPHINXOPTS) $(BUILDDIR)/changes
+	@echo
+	@echo "The overview file is in $(BUILDDIR)/changes."
+
+linkcheck:
+	$(SPHINXBUILD) -b linkcheck $(ALLSPHINXOPTS) $(BUILDDIR)/linkcheck
+	@echo
+	@echo "Link check complete; look for any errors in the above output " \
+	      "or in $(BUILDDIR)/linkcheck/output.txt."
+
+doctest:
+	$(SPHINXBUILD) -b doctest $(ALLSPHINXOPTS) $(BUILDDIR)/doctest
+	@echo "Testing of doctests in the sources finished, look at the " \
+	      "results in $(BUILDDIR)/doctest/output.txt."
diff --git a/docs/__init__.py b/docs/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/docs/__init__.py
diff --git a/docs/_themes/.gitignore b/docs/_themes/.gitignore
new file mode 100644
index 0000000..66b6e4c
--- /dev/null
+++ b/docs/_themes/.gitignore
@@ -0,0 +1,3 @@
+*.pyc
+*.pyo
+.DS_Store
diff --git a/docs/_themes/LICENSE b/docs/_themes/LICENSE
new file mode 100644
index 0000000..81f4d30
--- /dev/null
+++ b/docs/_themes/LICENSE
@@ -0,0 +1,45 @@
+Modifications: 
+
+Copyright (c) 2010 Kenneth Reitz.
+
+
+Original Project: 
+
+Copyright (c) 2010 by Armin Ronacher.
+
+
+Some rights reserved.
+
+Redistribution and use in source and binary forms of the theme, with or
+without modification, are permitted provided that the following conditions
+are met:
+
+* Redistributions of source code must retain the above copyright
+  notice, this list of conditions and the following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the following
+  disclaimer in the documentation and/or other materials provided
+  with the distribution.
+
+* The names of the contributors may not be used to endorse or
+  promote products derived from this software without specific
+  prior written permission.
+
+We kindly ask you to only use these themes in an unmodified manner just
+for Flask and Flask-related products, not for unrelated projects.  If you
+like the visual style and want to use it for your own projects, please
+consider making some larger changes to the themes (such as changing
+font faces, sizes, colors or margins).
+
+THIS THEME IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ARISING IN ANY WAY OUT OF THE USE OF THIS THEME, EVEN IF ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGE.
diff --git a/docs/_themes/README.rst b/docs/_themes/README.rst
new file mode 100644
index 0000000..8648482
--- /dev/null
+++ b/docs/_themes/README.rst
@@ -0,0 +1,25 @@
+krTheme Sphinx Style
+====================
+
+This repository contains sphinx styles Kenneth Reitz uses in most of 
+his projects. It is a drivative of Mitsuhiko's themes for Flask and Flask related
+projects.  To use this style in your Sphinx documentation, follow
+this guide:
+
+1. put this folder as _themes into your docs folder.  Alternatively
+   you can also use git submodules to check out the contents there.
+
+2. add this to your conf.py: ::
+
+	sys.path.append(os.path.abspath('_themes'))
+	html_theme_path = ['_themes']
+	html_theme = 'flask'
+
+The following themes exist:
+
+**kr**
+	the standard flask documentation theme for large projects
+
+**kr_small**
+	small one-page theme.  Intended to be used by very small addon libraries.
+
diff --git a/docs/_themes/flask_theme_support.py b/docs/_themes/flask_theme_support.py
new file mode 100644
index 0000000..33f4744
--- /dev/null
+++ b/docs/_themes/flask_theme_support.py
@@ -0,0 +1,86 @@
+# flasky extensions.  flasky pygments style based on tango style
+from pygments.style import Style
+from pygments.token import Keyword, Name, Comment, String, Error, \
+     Number, Operator, Generic, Whitespace, Punctuation, Other, Literal
+
+
+class FlaskyStyle(Style):
+    background_color = "#f8f8f8"
+    default_style = ""
+
+    styles = {
+        # No corresponding class for the following:
+        #Text:                     "", # class:  ''
+        Whitespace:                "underline #f8f8f8",      # class: 'w'
+        Error:                     "#a40000 border:#ef2929", # class: 'err'
+        Other:                     "#000000",                # class 'x'
+
+        Comment:                   "italic #8f5902", # class: 'c'
+        Comment.Preproc:           "noitalic",       # class: 'cp'
+
+        Keyword:                   "bold #004461",   # class: 'k'
+        Keyword.Constant:          "bold #004461",   # class: 'kc'
+        Keyword.Declaration:       "bold #004461",   # class: 'kd'
+        Keyword.Namespace:         "bold #004461",   # class: 'kn'
+        Keyword.Pseudo:            "bold #004461",   # class: 'kp'
+        Keyword.Reserved:          "bold #004461",   # class: 'kr'
+        Keyword.Type:              "bold #004461",   # class: 'kt'
+
+        Operator:                  "#582800",   # class: 'o'
+        Operator.Word:             "bold #004461",   # class: 'ow' - like keywords
+
+        Punctuation:               "bold #000000",   # class: 'p'
+
+        # because special names such as Name.Class, Name.Function, etc.
+        # are not recognized as such later in the parsing, we choose them
+        # to look the same as ordinary variables.
+        Name:                      "#000000",        # class: 'n'
+        Name.Attribute:            "#c4a000",        # class: 'na' - to be revised
+        Name.Builtin:              "#004461",        # class: 'nb'
+        Name.Builtin.Pseudo:       "#3465a4",        # class: 'bp'
+        Name.Class:                "#000000",        # class: 'nc' - to be revised
+        Name.Constant:             "#000000",        # class: 'no' - to be revised
+        Name.Decorator:            "#888",           # class: 'nd' - to be revised
+        Name.Entity:               "#ce5c00",        # class: 'ni'
+        Name.Exception:            "bold #cc0000",   # class: 'ne'
+        Name.Function:             "#000000",        # class: 'nf'
+        Name.Property:             "#000000",        # class: 'py'
+        Name.Label:                "#f57900",        # class: 'nl'
+        Name.Namespace:            "#000000",        # class: 'nn' - to be revised
+        Name.Other:                "#000000",        # class: 'nx'
+        Name.Tag:                  "bold #004461",   # class: 'nt' - like a keyword
+        Name.Variable:             "#000000",        # class: 'nv' - to be revised
+        Name.Variable.Class:       "#000000",        # class: 'vc' - to be revised
+        Name.Variable.Global:      "#000000",        # class: 'vg' - to be revised
+        Name.Variable.Instance:    "#000000",        # class: 'vi' - to be revised
+
+        Number:                    "#990000",        # class: 'm'
+
+        Literal:                   "#000000",        # class: 'l'
+        Literal.Date:              "#000000",        # class: 'ld'
+
+        String:                    "#4e9a06",        # class: 's'
+        String.Backtick:           "#4e9a06",        # class: 'sb'
+        String.Char:               "#4e9a06",        # class: 'sc'
+        String.Doc:                "italic #8f5902", # class: 'sd' - like a comment
+        String.Double:             "#4e9a06",        # class: 's2'
+        String.Escape:             "#4e9a06",        # class: 'se'
+        String.Heredoc:            "#4e9a06",        # class: 'sh'
+        String.Interpol:           "#4e9a06",        # class: 'si'
+        String.Other:              "#4e9a06",        # class: 'sx'
+        String.Regex:              "#4e9a06",        # class: 'sr'
+        String.Single:             "#4e9a06",        # class: 's1'
+        String.Symbol:             "#4e9a06",        # class: 'ss'
+
+        Generic:                   "#000000",        # class: 'g'
+        Generic.Deleted:           "#a40000",        # class: 'gd'
+        Generic.Emph:              "italic #000000", # class: 'ge'
+        Generic.Error:             "#ef2929",        # class: 'gr'
+        Generic.Heading:           "bold #000080",   # class: 'gh'
+        Generic.Inserted:          "#00A000",        # class: 'gi'
+        Generic.Output:            "#888",           # class: 'go'
+        Generic.Prompt:            "#745334",        # class: 'gp'
+        Generic.Strong:            "bold #000000",   # class: 'gs'
+        Generic.Subheading:        "bold #800080",   # class: 'gu'
+        Generic.Traceback:         "bold #a40000",   # class: 'gt'
+    }
diff --git a/docs/_themes/kr/layout.html b/docs/_themes/kr/layout.html
new file mode 100644
index 0000000..d7c8792
--- /dev/null
+++ b/docs/_themes/kr/layout.html
@@ -0,0 +1,16 @@
+{%- extends "basic/layout.html" %}
+{%- block extrahead %}
+  {{ super() }}
+  {% if theme_touch_icon %}
+  <link rel="apple-touch-icon" href="{{ pathto('_static/' ~ theme_touch_icon, 1) }}" />
+  {% endif %}
+  <link media="only screen and (max-device-width: 480px)" href="{{
+    pathto('_static/small_flask.css', 1) }}" type= "text/css" rel="stylesheet" />
+{% endblock %}
+{%- block relbar2 %}{% endblock %}
+{%- block footer %}
+    <div class="footer">
+      &copy; Copyright {{ copyright }}.
+      Created using <a href="http://sphinx.pocoo.org/">Sphinx</a>.
+    </div>
+{%- endblock %}
diff --git a/docs/_themes/kr/relations.html b/docs/_themes/kr/relations.html
new file mode 100644
index 0000000..3bbcde8
--- /dev/null
+++ b/docs/_themes/kr/relations.html
@@ -0,0 +1,19 @@
+<h3>Related Topics</h3>
+<ul>
+  <li><a href="{{ pathto(master_doc) }}">Documentation overview</a><ul>
+  {%- for parent in parents %}
+  <li><a href="{{ parent.link|e }}">{{ parent.title }}</a><ul>
+  {%- endfor %}
+    {%- if prev %}
+      <li>Previous: <a href="{{ prev.link|e }}" title="{{ _('previous chapter')
+        }}">{{ prev.title }}</a></li>
+    {%- endif %}
+    {%- if next %}
+      <li>Next: <a href="{{ next.link|e }}" title="{{ _('next chapter')
+        }}">{{ next.title }}</a></li>
+    {%- endif %}
+  {%- for parent in parents %}
+  </ul></li>
+  {%- endfor %}
+  </ul></li>
+</ul>
diff --git a/docs/_themes/kr/static/flasky.css_t b/docs/_themes/kr/static/flasky.css_t
new file mode 100644
index 0000000..c680994
--- /dev/null
+++ b/docs/_themes/kr/static/flasky.css_t
@@ -0,0 +1,387 @@
+/*
+ * flasky.css_t
+ * ~~~~~~~~~~~~
+ *
+ * :copyright: Copyright 2010 by Armin Ronacher. Modifications by Kenneth Reitz.
+ * :license: Flask Design License, see LICENSE for details.
+ */
+
+{% set page_width = '940px' %}
+{% set sidebar_width = '220px' %}
+ 
+@import url("basic.css");
+ 
+/* -- page layout ----------------------------------------------------------- */
+ 
+body {
+    font-family: 'goudy old style', 'minion pro', 'bell mt', Georgia, 'Hiragino Mincho Pro';
+    font-size: 17px;
+    background-color: white;
+    color: #000;
+    margin: 0;
+    padding: 0;
+}
+
+div.document {
+    width: {{ page_width }};
+    margin: 30px auto 0 auto;
+}
+
+div.documentwrapper {
+    float: left;
+    width: 100%;
+}
+
+div.bodywrapper {
+    margin: 0 0 0 {{ sidebar_width }};
+}
+
+div.sphinxsidebar {
+    width: {{ sidebar_width }};
+}
+
+hr {
+    border: 1px solid #B1B4B6;
+}
+ 
+div.body {
+    background-color: #ffffff;
+    color: #3E4349;
+    padding: 0 30px 0 30px;
+}
+
+img.floatingflask {
+    padding: 0 0 10px 10px;
+    float: right;
+}
+ 
+div.footer {
+    width: {{ page_width }};
+    margin: 20px auto 30px auto;
+    font-size: 14px;
+    color: #888;
+    text-align: right;
+}
+
+div.footer a {
+    color: #888;
+}
+
+div.related {
+    display: none;
+}
+ 
+div.sphinxsidebar a {
+    color: #444;
+    text-decoration: none;
+    border-bottom: 1px dotted #999;
+}
+
+div.sphinxsidebar a:hover {
+    border-bottom: 1px solid #999;
+}
+ 
+div.sphinxsidebar {
+    font-size: 14px;
+    line-height: 1.5;
+}
+
+div.sphinxsidebarwrapper {
+    padding: 18px 10px;
+}
+
+div.sphinxsidebarwrapper p.logo {
+    padding: 0 0 20px 0;
+    margin: 0;
+    text-align: center;
+}
+ 
+div.sphinxsidebar h3,
+div.sphinxsidebar h4 {
+    font-family: 'Garamond', 'Georgia', serif;
+    color: #444;
+    font-size: 24px;
+    font-weight: normal;
+    margin: 0 0 5px 0;
+    padding: 0;
+}
+
+div.sphinxsidebar h4 {
+    font-size: 20px;
+}
+ 
+div.sphinxsidebar h3 a {
+    color: #444;
+}
+
+div.sphinxsidebar p.logo a,
+div.sphinxsidebar h3 a,
+div.sphinxsidebar p.logo a:hover,
+div.sphinxsidebar h3 a:hover {
+    border: none;
+}
+ 
+div.sphinxsidebar p {
+    color: #555;
+    margin: 10px 0;
+}
+
+div.sphinxsidebar ul {
+    margin: 10px 0;
+    padding: 0;
+    color: #000;
+}
+ 
+div.sphinxsidebar input {
+    border: 1px solid #ccc;
+    font-family: 'Georgia', serif;
+    font-size: 1em;
+}
+ 
+/* -- body styles ----------------------------------------------------------- */
+ 
+a {
+    color: #004B6B;
+    text-decoration: underline;
+}
+ 
+a:hover {
+    color: #6D4100;
+    text-decoration: underline;
+}
+ 
+div.body h1,
+div.body h2,
+div.body h3,
+div.body h4,
+div.body h5,
+div.body h6 {
+    font-family: 'Garamond', 'Georgia', serif;
+    font-weight: normal;
+    margin: 30px 0px 10px 0px;
+    padding: 0;
+}
+ 
+div.body h1 { margin-top: 0; padding-top: 0; font-size: 240%; }
+div.body h2 { font-size: 180%; }
+div.body h3 { font-size: 150%; }
+div.body h4 { font-size: 130%; }
+div.body h5 { font-size: 100%; }
+div.body h6 { font-size: 100%; }
+ 
+a.headerlink {
+    color: #ddd;
+    padding: 0 4px;
+    text-decoration: none;
+}
+ 
+a.headerlink:hover {
+    color: #444;
+    background: #eaeaea;
+}
+ 
+div.body p, div.body dd, div.body li {
+    line-height: 1.4em;
+}
+
+div.admonition {
+    background: #fafafa;
+    margin: 20px -30px;
+    padding: 10px 30px;
+    border-top: 1px solid #ccc;
+    border-bottom: 1px solid #ccc;
+}
+
+div.admonition tt.xref, div.admonition a tt {
+    border-bottom: 1px solid #fafafa;
+}
+
+dd div.admonition {
+    margin-left: -60px;
+    padding-left: 60px;
+}
+
+div.admonition p.admonition-title {
+    font-family: 'Garamond', 'Georgia', serif;
+    font-weight: normal;
+    font-size: 24px;
+    margin: 0 0 10px 0;
+    padding: 0;
+    line-height: 1;
+}
+
+div.admonition p.last {
+    margin-bottom: 0;
+}
+
+div.highlight {
+    background-color: white;
+}
+
+dt:target, .highlight {
+    background: #FAF3E8;
+}
+
+div.note {
+    background-color: #eee;
+    border: 1px solid #ccc;
+}
+ 
+div.seealso {
+    background-color: #ffc;
+    border: 1px solid #ff6;
+}
+ 
+div.topic {
+    background-color: #eee;
+}
+ 
+p.admonition-title {
+    display: inline;
+}
+ 
+p.admonition-title:after {
+    content: ":";
+}
+
+pre, tt {
+    font-family: 'Consolas', 'Menlo', 'Deja Vu Sans Mono', 'Bitstream Vera Sans Mono', monospace;
+    font-size: 0.9em;
+}
+
+img.screenshot {
+}
+
+tt.descname, tt.descclassname {
+    font-size: 0.95em;
+}
+
+tt.descname {
+    padding-right: 0.08em;
+}
+
+img.screenshot {
+    -moz-box-shadow: 2px 2px 4px #eee;
+    -webkit-box-shadow: 2px 2px 4px #eee;
+    box-shadow: 2px 2px 4px #eee;
+}
+
+table.docutils {
+    border: 1px solid #888;
+    -moz-box-shadow: 2px 2px 4px #eee;
+    -webkit-box-shadow: 2px 2px 4px #eee;
+    box-shadow: 2px 2px 4px #eee;
+}
+
+table.docutils td, table.docutils th {
+    border: 1px solid #888;
+    padding: 0.25em 0.7em;
+}
+
+table.field-list, table.footnote {
+    border: none;
+    -moz-box-shadow: none;
+    -webkit-box-shadow: none;
+    box-shadow: none;
+}
+
+table.footnote {
+    margin: 15px 0;
+    width: 100%;
+    border: 1px solid #eee;
+    background: #fdfdfd;
+    font-size: 0.9em;
+}
+
+table.footnote + table.footnote {
+    margin-top: -15px;
+    border-top: none;
+}
+
+table.field-list th {
+    padding: 0 0.8em 0 0;
+}
+
+table.field-list td {
+    padding: 0;
+}
+
+table.footnote td.label {
+    width: 0px;
+    padding: 0.3em 0 0.3em 0.5em;
+}
+
+table.footnote td {
+    padding: 0.3em 0.5em;
+}
+
+dl {
+    margin: 0;
+    padding: 0;
+}
+
+dl dd {
+    margin-left: 30px;
+}
+
+blockquote {
+    margin: 0 0 0 30px;
+    padding: 0;
+}
+
+ul, ol {
+    margin: 10px 0 10px 30px;
+    padding: 0;
+}
+ 
+pre {
+    background: #eee;
+    padding: 7px 30px;
+    margin: 15px -30px;
+    line-height: 1.3em;
+}
+
+dl pre, blockquote pre, li pre {
+    margin-left: -60px;
+    padding-left: 60px;
+}
+
+dl dl pre {
+    margin-left: -90px;
+    padding-left: 90px;
+}
+ 
+tt {
+    background-color: #ecf0f3;
+    color: #222;
+    /* padding: 1px 2px; */
+}
+
+tt.xref, a tt {
+    background-color: #FBFBFB;
+    border-bottom: 1px solid white;
+}
+
+a.reference {
+    text-decoration: none;
+    border-bottom: 1px dotted #004B6B;
+}
+
+a.reference:hover {
+    border-bottom: 1px solid #6D4100;
+}
+
+a.footnote-reference {
+    text-decoration: none;
+    font-size: 0.7em;
+    vertical-align: top;
+    border-bottom: 1px dotted #004B6B;
+}
+
+a.footnote-reference:hover {
+    border-bottom: 1px solid #6D4100;
+}
+
+a:hover tt {
+    background: #EEE;
+}
diff --git a/docs/_themes/kr/static/small_flask.css b/docs/_themes/kr/static/small_flask.css
new file mode 100644
index 0000000..1c6df30
--- /dev/null
+++ b/docs/_themes/kr/static/small_flask.css
@@ -0,0 +1,70 @@
+/*
+ * small_flask.css_t
+ * ~~~~~~~~~~~~~~~~~
+ *
+ * :copyright: Copyright 2010 by Armin Ronacher.
+ * :license: Flask Design License, see LICENSE for details.
+ */
+
+body {
+    margin: 0;
+    padding: 20px 30px;
+}
+
+div.documentwrapper {
+    float: none;
+    background: white;
+}
+
+div.sphinxsidebar {
+    display: block;
+    float: none;
+    width: 102.5%;
+    margin: 50px -30px -20px -30px;
+    padding: 10px 20px;
+    background: #333;
+    color: white;
+}
+
+div.sphinxsidebar h3, div.sphinxsidebar h4, div.sphinxsidebar p,
+div.sphinxsidebar h3 a {
+    color: white;
+}
+
+div.sphinxsidebar a {
+    color: #aaa;
+}
+
+div.sphinxsidebar p.logo {
+    display: none;
+}
+
+div.document {
+    width: 100%;
+    margin: 0;
+}
+
+div.related {
+    display: block;
+    margin: 0;
+    padding: 10px 0 20px 0;
+}
+
+div.related ul,
+div.related ul li {
+    margin: 0;
+    padding: 0;
+}
+
+div.footer {
+    display: none;
+}
+
+div.bodywrapper {
+    margin: 0;
+}
+
+div.body {
+    min-height: 0;
+    padding: 0;
+}
diff --git a/docs/_themes/kr/theme.conf b/docs/_themes/kr/theme.conf
new file mode 100644
index 0000000..307a1f0
--- /dev/null
+++ b/docs/_themes/kr/theme.conf
@@ -0,0 +1,7 @@
+[theme]
+inherit = basic
+stylesheet = flasky.css
+pygments_style = flask_theme_support.FlaskyStyle
+
+[options]
+touch_icon = 
diff --git a/docs/_themes/kr_small/layout.html b/docs/_themes/kr_small/layout.html
new file mode 100644
index 0000000..aa1716a
--- /dev/null
+++ b/docs/_themes/kr_small/layout.html
@@ -0,0 +1,22 @@
+{% extends "basic/layout.html" %}
+{% block header %}
+  {{ super() }}
+  {% if pagename == 'index' %}
+  <div class=indexwrapper>
+  {% endif %}
+{% endblock %}
+{% block footer %}
+  {% if pagename == 'index' %}
+  </div>
+  {% endif %}
+{% endblock %}
+{# do not display relbars #}
+{% block relbar1 %}{% endblock %}
+{% block relbar2 %}
+  {% if theme_github_fork %}
+    <a href="http://github.com/{{ theme_github_fork }}"><img style="position: fixed; top: 0; right: 0; border: 0;"
+    src="http://s3.amazonaws.com/github/ribbons/forkme_right_darkblue_121621.png" alt="Fork me on GitHub" /></a>
+  {% endif %}
+{% endblock %}
+{% block sidebar1 %}{% endblock %}
+{% block sidebar2 %}{% endblock %}
diff --git a/docs/_themes/kr_small/static/flasky.css_t b/docs/_themes/kr_small/static/flasky.css_t
new file mode 100644
index 0000000..fe2141c
--- /dev/null
+++ b/docs/_themes/kr_small/static/flasky.css_t
@@ -0,0 +1,287 @@
+/*
+ * flasky.css_t
+ * ~~~~~~~~~~~~
+ *
+ * Sphinx stylesheet -- flasky theme based on nature theme.
+ *
+ * :copyright: Copyright 2007-2010 by the Sphinx team, see AUTHORS.
+ * :license: BSD, see LICENSE for details.
+ *
+ */
+ 
+@import url("basic.css");
+ 
+/* -- page layout ----------------------------------------------------------- */
+ 
+body {
+    font-family: 'Georgia', serif;
+    font-size: 17px;
+    color: #000;
+    background: white;
+    margin: 0;
+    padding: 0;
+}
+
+div.documentwrapper {
+    float: left;
+    width: 100%;
+}
+
+div.bodywrapper {
+    margin: 40px auto 0 auto;
+    width: 700px;
+}
+
+hr {
+    border: 1px solid #B1B4B6;
+}
+ 
+div.body {
+    background-color: #ffffff;
+    color: #3E4349;
+    padding: 0 30px 30px 30px;
+}
+
+img.floatingflask {
+    padding: 0 0 10px 10px;
+    float: right;
+}
+ 
+div.footer {
+    text-align: right;
+    color: #888;
+    padding: 10px;
+    font-size: 14px;
+    width: 650px;
+    margin: 0 auto 40px auto;
+}
+ 
+div.footer a {
+    color: #888;
+    text-decoration: underline;
+}
+ 
+div.related {
+    line-height: 32px;
+    color: #888;
+}
+
+div.related ul {
+    padding: 0 0 0 10px;
+}
+ 
+div.related a {
+    color: #444;
+}
+ 
+/* -- body styles ----------------------------------------------------------- */
+ 
+a {
+    color: #004B6B;
+    text-decoration: underline;
+}
+ 
+a:hover {
+    color: #6D4100;
+    text-decoration: underline;
+}
+
+div.body {
+    padding-bottom: 40px; /* saved for footer */
+}
+ 
+div.body h1,
+div.body h2,
+div.body h3,
+div.body h4,
+div.body h5,
+div.body h6 {
+    font-family: 'Garamond', 'Georgia', serif;
+    font-weight: normal;
+    margin: 30px 0px 10px 0px;
+    padding: 0;
+}
+
+{% if theme_index_logo %}
+div.indexwrapper h1 {
+    text-indent: -999999px;
+    background: url({{ theme_index_logo }}) no-repeat center center;
+    height: {{ theme_index_logo_height }};
+}
+{% endif %}
+ 
+div.body h2 { font-size: 180%; }
+div.body h3 { font-size: 150%; }
+div.body h4 { font-size: 130%; }
+div.body h5 { font-size: 100%; }
+div.body h6 { font-size: 100%; }
+ 
+a.headerlink {
+    color: white;
+    padding: 0 4px;
+    text-decoration: none;
+}
+ 
+a.headerlink:hover {
+    color: #444;
+    background: #eaeaea;
+}
+ 
+div.body p, div.body dd, div.body li {
+    line-height: 1.4em;
+}
+
+div.admonition {
+    background: #fafafa;
+    margin: 20px -30px;
+    padding: 10px 30px;
+    border-top: 1px solid #ccc;
+    border-bottom: 1px solid #ccc;
+}
+
+div.admonition p.admonition-title {
+    font-family: 'Garamond', 'Georgia', serif;
+    font-weight: normal;
+    font-size: 24px;
+    margin: 0 0 10px 0;
+    padding: 0;
+    line-height: 1;
+}
+
+div.admonition p.last {
+    margin-bottom: 0;
+}
+
+div.highlight{
+    background-color: white;
+}
+
+dt:target, .highlight {
+    background: #FAF3E8;
+}
+
+div.note {
+    background-color: #eee;
+    border: 1px solid #ccc;
+}
+ 
+div.seealso {
+    background-color: #ffc;
+    border: 1px solid #ff6;
+}
+ 
+div.topic {
+    background-color: #eee;
+}
+ 
+div.warning {
+    background-color: #ffe4e4;
+    border: 1px solid #f66;
+}
+ 
+p.admonition-title {
+    display: inline;
+}
+ 
+p.admonition-title:after {
+    content: ":";
+}
+
+pre, tt {
+    font-family: 'Consolas', 'Menlo', 'Deja Vu Sans Mono', 'Bitstream Vera Sans Mono', monospace;
+    font-size: 0.85em;
+}
+
+img.screenshot {
+}
+
+tt.descname, tt.descclassname {
+    font-size: 0.95em;
+}
+
+tt.descname {
+    padding-right: 0.08em;
+}
+
+img.screenshot {
+    -moz-box-shadow: 2px 2px 4px #eee;
+    -webkit-box-shadow: 2px 2px 4px #eee;
+    box-shadow: 2px 2px 4px #eee;
+}
+
+table.docutils {
+    border: 1px solid #888;
+    -moz-box-shadow: 2px 2px 4px #eee;
+    -webkit-box-shadow: 2px 2px 4px #eee;
+    box-shadow: 2px 2px 4px #eee;
+}
+
+table.docutils td, table.docutils th {
+    border: 1px solid #888;
+    padding: 0.25em 0.7em;
+}
+
+table.field-list, table.footnote {
+    border: none;
+    -moz-box-shadow: none;
+    -webkit-box-shadow: none;
+    box-shadow: none;
+}
+
+table.footnote {
+    margin: 15px 0;
+    width: 100%;
+    border: 1px solid #eee;
+}
+
+table.field-list th {
+    padding: 0 0.8em 0 0;
+}
+
+table.field-list td {
+    padding: 0;
+}
+
+table.footnote td {
+    padding: 0.5em;
+}
+
+dl {
+    margin: 0;
+    padding: 0;
+}
+
+dl dd {
+    margin-left: 30px;
+}
+ 
+pre {
+    padding: 0;
+    margin: 15px -30px;
+    padding: 8px;
+    line-height: 1.3em;
+    padding: 7px 30px;
+    background: #eee;
+    border-radius: 2px;
+    -moz-border-radius: 2px;
+    -webkit-border-radius: 2px;
+}
+
+dl pre {
+    margin-left: -60px;
+    padding-left: 60px;
+}
+
+tt {
+    background-color: #ecf0f3;
+    color: #222;
+    /* padding: 1px 2px; */
+}
+
+tt.xref, a tt {
+    background-color: #FBFBFB;
+}
+
+a:hover tt {
+    background: #EEE;
+}
diff --git a/docs/_themes/kr_small/theme.conf b/docs/_themes/kr_small/theme.conf
new file mode 100644
index 0000000..542b462
--- /dev/null
+++ b/docs/_themes/kr_small/theme.conf
@@ -0,0 +1,10 @@
+[theme]
+inherit = basic
+stylesheet = flasky.css
+nosidebar = true
+pygments_style = flask_theme_support.FlaskyStyle
+
+[options]
+index_logo = ''
+index_logo_height = 120px
+github_fork = ''
diff --git a/docs/conf.py b/docs/conf.py
new file mode 100644
index 0000000..4d80fe7
--- /dev/null
+++ b/docs/conf.py
@@ -0,0 +1,220 @@
+# -*- coding: utf-8 -*-
+#
+# Tablib documentation build configuration file, created by
+# sphinx-quickstart on Tue Oct  5 15:25:21 2010.
+#
+# This file is execfile()d with the current directory set to its containing dir.
+#
+# Note that not all possible configuration values are present in this
+# autogenerated file.
+#
+# All configuration values have a default; values that are commented out
+# serve to show the default.
+
+import sys, os
+
+# If extensions (or modules to document with autodoc) are in another directory,
+# add these directories to sys.path here. If the directory is relative to the
+# documentation root, use os.path.abspath to make it absolute, like shown here.
+#sys.path.insert(0, os.path.abspath('.'))
+
+# -- General configuration -----------------------------------------------------
+
+# If your documentation needs a minimal Sphinx version, state it here.
+#needs_sphinx = '1.0'
+
+# Add any Sphinx extension module names here, as strings. They can be extensions
+# coming with Sphinx (named 'sphinx.ext.*') or your custom ones.
+extensions = ['sphinx.ext.autodoc', 'sphinx.ext.todo', 'sphinx.ext.coverage', 'sphinx.ext.viewcode']
+
+# Add any paths that contain templates here, relative to this directory.
+templates_path = ['_templates']
+
+# The suffix of source filenames.
+source_suffix = '.rst'
+
+# The encoding of source files.
+#source_encoding = 'utf-8-sig'
+
+# The master toctree document.
+master_doc = 'index'
+
+# General information about the project.
+project = u'Tablib'
+copyright = u'2010, Kenneth Reitz'
+
+# The version info for the project you're documenting, acts as replacement for
+# |version| and |release|, also used in various other places throughout the
+# built documents.
+#
+# The short X.Y version.
+version = '0.8.3'
+# The full version, including alpha/beta/rc tags.
+release = '0.8.3'
+
+# The language for content autogenerated by Sphinx. Refer to documentation
+# for a list of supported languages.
+#language = None
+
+# There are two options for replacing |today|: either, you set today to some
+# non-false value, then it is used:
+#today = ''
+# Else, today_fmt is used as the format for a strftime call.
+#today_fmt = '%B %d, %Y'
+
+# List of patterns, relative to source directory, that match files and
+# directories to ignore when looking for source files.
+exclude_patterns = ['_build']
+
+# The reST default role (used for this markup: `text`) to use for all documents.
+#default_role = None
+
+# If true, '()' will be appended to :func: etc. cross-reference text.
+#add_function_parentheses = True
+
+# If true, the current module name will be prepended to all description
+# unit titles (such as .. function::).
+#add_module_names = True
+
+# If true, sectionauthor and moduleauthor directives will be shown in the
+# output. They are ignored by default.
+#show_authors = False
+
+# The name of the Pygments (syntax highlighting) style to use.
+pygments_style = 'sphinx'
+
+# A list of ignored prefixes for module index sorting.
+#modindex_common_prefix = []
+
+
+# -- Options for HTML output ---------------------------------------------------
+
+# The theme to use for HTML and HTML Help pages.  See the documentation for
+# a list of builtin themes.
+html_theme = 'default'
+
+# Theme options are theme-specific and customize the look and feel of a theme
+# further.  For a list of options available for each theme, see the
+# documentation.
+#html_theme_options = {}
+
+# Add any paths that contain custom themes here, relative to this directory.
+#html_theme_path = []
+
+# The name for this set of Sphinx documents.  If None, it defaults to
+# "<project> v<release> documentation".
+#html_title = None
+
+# A shorter title for the navigation bar.  Default is the same as html_title.
+#html_short_title = None
+
+# The name of an image file (relative to this directory) to place at the top
+# of the sidebar.
+#html_logo = None
+
+# The name of an image file (within the static path) to use as favicon of the
+# docs.  This file should be a Windows icon file (.ico) being 16x16 or 32x32
+# pixels large.
+#html_favicon = None
+
+# Add any paths that contain custom static files (such as style sheets) here,
+# relative to this directory. They are copied after the builtin static files,
+# so a file named "default.css" will overwrite the builtin "default.css".
+html_static_path = ['_static']
+
+# If not '', a 'Last updated on:' timestamp is inserted at every page bottom,
+# using the given strftime format.
+#html_last_updated_fmt = '%b %d, %Y'
+
+# If true, SmartyPants will be used to convert quotes and dashes to
+# typographically correct entities.
+#html_use_smartypants = True
+
+# Custom sidebar templates, maps document names to template names.
+#html_sidebars = {}
+
+# Additional templates that should be rendered to pages, maps page names to
+# template names.
+#html_additional_pages = {}
+
+# If false, no module index is generated.
+#html_domain_indices = True
+
+# If false, no index is generated.
+#html_use_index = True
+
+# If true, the index is split into individual pages for each letter.
+#html_split_index = False
+
+# If true, links to the reST sources are added to the pages.
+#html_show_sourcelink = True
+
+# If true, "Created using Sphinx" is shown in the HTML footer. Default is True.
+#html_show_sphinx = True
+
+# If true, "(C) Copyright ..." is shown in the HTML footer. Default is True.
+#html_show_copyright = True
+
+# If true, an OpenSearch description file will be output, and all pages will
+# contain a <link> tag referring to it.  The value of this option must be the
+# base URL from which the finished HTML is served.
+#html_use_opensearch = ''
+
+# This is the file name suffix for HTML files (e.g. ".xhtml").
+#html_file_suffix = None
+
+# Output file base name for HTML help builder.
+htmlhelp_basename = 'Tablibdoc'
+
+
+# -- Options for LaTeX output --------------------------------------------------
+
+# The paper size ('letter' or 'a4').
+#latex_paper_size = 'letter'
+
+# The font size ('10pt', '11pt' or '12pt').
+#latex_font_size = '10pt'
+
+# Grouping the document tree into LaTeX files. List of tuples
+# (source start file, target name, title, author, documentclass [howto/manual]).
+latex_documents = [
+  ('index', 'Tablib.tex', u'Tablib Documentation',
+   u'Kenneth Reitz', 'manual'),
+]
+
+# The name of an image file (relative to this directory) to place at the top of
+# the title page.
+#latex_logo = None
+
+# For "manual" documents, if this is true, then toplevel headings are parts,
+# not chapters.
+#latex_use_parts = False
+
+# If true, show page references after internal links.
+#latex_show_pagerefs = False
+
+# If true, show URL addresses after external links.
+#latex_show_urls = False
+
+# Additional stuff for the LaTeX preamble.
+#latex_preamble = ''
+
+# Documents to append as an appendix to all manuals.
+#latex_appendices = []
+
+# If false, no module index is generated.
+#latex_domain_indices = True
+
+
+# -- Options for manual page output --------------------------------------------
+
+# One entry per manual page. List of tuples
+# (source start file, name, description, authors, manual section).
+man_pages = [
+    ('index', 'tablib', u'Tablib Documentation',
+     [u'Kenneth Reitz'], 1)
+]
+
+sys.path.append(os.path.abspath('_themes'))
+html_theme_path = ['_themes']
+html_theme = 'kr'
\ No newline at end of file
diff --git a/docs/index.rst b/docs/index.rst
new file mode 100644
index 0000000..bb0589c
--- /dev/null
+++ b/docs/index.rst
@@ -0,0 +1,34 @@
+.. Tablib documentation master file, created by
+   sphinx-quickstart on Tue Oct  5 15:25:21 2010.
+   You can adapt this file completely to your liking, but it should at least
+   contain the root `toctree` directive.
+
+Welcome to Tablib's documentation!
+==================================
+
+Contents:
+
+.. toctree::
+   :maxdepth: 2
+
+Indices and tables
+==================
+
+* :ref:`genindex`
+* :ref:`modindex`
+* :ref:`search`
+
+Dataset Object
+--------------
+.. module:: tablib
+
+.. autoclass:: Databook
+   :members:
+   :inherited-members:
+
+Databook Object
+---------------
+
+.. autoclass:: Dataset
+   :members:
+   :inherited-members:
diff --git a/setup.py b/setup.py
index 060ce00..e93f61b 100644
--- a/setup.py
+++ b/setup.py
@@ -15,17 +15,27 @@ if sys.argv[-1] == "publish":
 	publish()
 	sys.exit()
 
+required = []
+
+# if sys.version_info < (2, 6):
+# 	required.append('simplejson')
+
 setup(
 	name='tablib',
-	version='0.8.4',
+	version='0.8.5',
 	description='Format agnostic tabular data library (XLS, JSON, YAML, CSV)',
 	long_description=open('README.rst').read() + '\n\n' +
 	                 open('HISTORY.rst').read(),
 	author='Kenneth Reitz',
 	author_email='me@kennethreitz.com',
 	url='http://github.com/kennethreitz/tablib',
-	packages=['tablib', 'tablib.formats'],
-	install_requires=['xlwt', 'simplejson', 'PyYAML'],
+	packages= [
+		'tablib', 'tablib.formats', 
+		'tablib.packages.simplejson'
+		'tablib.packages.xlwt',
+		'tablib.packages.yaml', 
+	],
+	install_requires=required,
 	license='MIT',
 	classifiers=(
 		'Development Status :: 5 - Production/Stable',
diff --git a/tablib/core.py b/tablib/core.py
index aa840ad..544c208 100644
--- a/tablib/core.py
+++ b/tablib/core.py
@@ -1,21 +1,108 @@
 # -*- coding: utf-8 -*-
+"""
+    tablib.core
+    ~~~~~~~~~~~
+
+    This module implements the central tablib objects.
 
-""" Tablib - Core Library.
+    :copyright: (c) 2010 by Kenneth Reitz.
+    :license: MIT, see LICENSE for more details.
 """
 
 from tablib.formats import FORMATS as formats
 
 
 __title__ = 'tablib'
-__version__ = '0.8.4'
-__build__ = 0x000804
+__version__ = '0.8.5'
+__build__ = 0x000805
 __author__ = 'Kenneth Reitz'
 __license__ = 'MIT'
 __copyright__ = 'Copyright 2010 Kenneth Reitz'
 
 
 class Dataset(object):
-	"""Epic Tabular-Dataset object. """
+	"""The tablib Dataset object is the heart of tablib. It provides all core 
+    functionality.
+    
+    Usually you create a :class:`Dataset` instance in your main module, and append
+    rows and columns as you collect data. ::
+    
+        data = tablib.Dataset()
+        data.headers = ('name', 'age')
+        
+        for (name, age) in some_collector():
+            data.append((name, age))
+    
+    You can also set rows and headers upon instantiation. This is useful if dealing
+    with dozens or hundres of :class:`Dataset` objects. ::
+            
+        headers = ('first_name', 'last_name')
+        data = [('John', 'Adams'), ('George', 'Washington')]
+        
+        data = tablib.Dataset(*data, headers=headers)
+                
+    
+    :param \*args: (optional) list of rows to populate Dataset
+    :param headers: (optional) list strings for Dataset header row
+    
+    
+    .. admonition:: About the Format Attributes
+    
+        If you look at the code, the various output/import formats are not 
+        defined within the itself. To add support for a new format, see 
+        :ref:`Adding New Formats`.
+
+    .. attribute:: csv
+
+        A CSV representation of the Dataset object. The top row will contain 
+        headers, if they have been set. Otherwise, the top row will contain 
+        the first row of the dataset.
+    
+        A dataset object can also be imported by setting the `Dataset.csv` attribute: ::
+    
+            data = tablib.Dataset()
+            data.csv = 'age, first_name, last_name\\n90, John, Adams'
+    
+        Import assumes (for now) that headers exist.
+
+
+    .. attribute:: dict
+
+        An native Python representation of the Dataset object. If headers have been 
+        set, a list of Python dictionaries will be returned. If no headers have been
+        set, a list of tuples (rows) will be returned instead.
+
+        A dataset object can also be imported by setting the `Dataset.dict` attribute: ::
+    
+            data = tablib.Dataset()
+            data.dict = [{'age': 90, 'first_name': 'Kenneth', 'last_name': 'Reitz'}]
+ 
+    
+    .. attribute:: xls
+
+        An Excel Spreadsheet representation of the Dataset object, including 
+        :ref:`seperators`. 
+
+        *Note:* `Dataset.xls` contains binary data, so make sure to write in binary 
+        mode::
+        
+            with open('output.xls', 'wb') as f:
+                f.write(data.xls)
+
+
+    .. attribute:: yaml
+
+        A YAML representation of the Dataset object. If headers have been 
+        set, a YAML list of objects will be returned. If no headers have 
+        been set, a YAML list of lists (rows) will be returned instead.  
+
+        A dataset object can also be imported by setting the `Dataset.json` attribute: ::
+
+            data = tablib.Dataset()
+            data.yaml = '- {age: 90, first_name: John, last_name: Adams}'
+
+        Import assumes (for now) that headers exist.
+	"""
 
 	def __init__(self, *args, **kwargs):
 		self._data = list(args)
@@ -155,19 +242,34 @@ class Dataset(object):
 
 	@property
 	def dict(self):
-		"""Returns python dict of Dataset."""
+		"""A JSON representation of the Dataset object. If headers have been 
+        set, a JSON list of objects will be returned. If no headers have 
+        been set, a JSON list of lists (rows) will be returned instead.  
+
+        A dataset object can also be imported by setting the `Dataset.json` attribute: ::
+
+            data = tablib.Dataset()
+            data.json = '[{"last_name": "Adams","age": 90,"first_name": "John"}]'
+
+		"""
 		return self._package()
 
 	
 	@dict.setter
 	def dict(self, pickle):
-		"""Returns python dict of Dataset."""
+	    
 		if not len(pickle):
 			return
+
+		# if list of rows
 		if isinstance(pickle[0], list):
+			self.wipe()
 			for row in pickle:
 				self.append(row)
+		
+		# if list of objects
 		elif isinstance(pickle[0], dict):
+			self.wipe()
 			self.headers = pickle[0].keys()
 			for row in pickle:
 				self.append(row.values())
diff --git a/tablib/formats/_csv.py b/tablib/formats/_csv.py
index 27d2e0d..2391417 100644
--- a/tablib/formats/_csv.py
+++ b/tablib/formats/_csv.py
@@ -7,8 +7,6 @@ import cStringIO
 import csv
 import os
 
-import simplejson as json
-
 import tablib
 
 
diff --git a/tablib/formats/_json.py b/tablib/formats/_json.py
index f7c88ee..da31b23 100644
--- a/tablib/formats/_json.py
+++ b/tablib/formats/_json.py
@@ -3,9 +3,17 @@
 """ Tablib - JSON Support
 """
 
-import simplejson as json
+try:
+	import json  # load system JSON (Python >= 2.6)
+except ImportError:
+	try:
+		import simplejson as json
+	except ImportError:
+		import tablib.packages.simplejson as json # use the vendorized copy
+
 import tablib.core
 
+
 title = 'json'
 extentions = ('json', 'jsn')
 
@@ -43,5 +51,5 @@ def detect(stream):
 	try:
 		json.loads(stream)
 		return True
-	except json.decoder.JSONDecodeError:
+	except ValueError:
 		return False
\ No newline at end of file
diff --git a/tablib/formats/_xls.py b/tablib/formats/_xls.py
index f7be4a4..97a9580 100644
--- a/tablib/formats/_xls.py
+++ b/tablib/formats/_xls.py
@@ -3,9 +3,13 @@
 """ Tablib - XLS Support.
 """
 
-import xlwt
 import cStringIO
 
+try:
+	import xlwt
+except ImportError:
+	import tablib.packages.xlwt as xlwt
+
 
 title = 'xls'
 extentions = ('xls',)
diff --git a/tablib/formats/_yaml.py b/tablib/formats/_yaml.py
index 57d63d7..59d49a0 100644
--- a/tablib/formats/_yaml.py
+++ b/tablib/formats/_yaml.py
@@ -3,7 +3,11 @@
 """ Tablib - YAML Support.
 """
 
-import yaml
+try:
+	import yaml
+except ImportError:
+	import tablib.packages.yaml as yaml
+
 import tablib
 
 
diff --git a/tablib/packages/__init__.py b/tablib/packages/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/tablib/packages/__init__.py
diff --git a/tablib/packages/simplejson/__init__.py b/tablib/packages/simplejson/__init__.py
new file mode 100644
index 0000000..dcfd541
--- /dev/null
+++ b/tablib/packages/simplejson/__init__.py
@@ -0,0 +1,437 @@
+r"""JSON (JavaScript Object Notation) <http://json.org> is a subset of
+JavaScript syntax (ECMA-262 3rd edition) used as a lightweight data
+interchange format.
+
+:mod:`simplejson` exposes an API familiar to users of the standard library
+:mod:`marshal` and :mod:`pickle` modules. It is the externally maintained
+version of the :mod:`json` library contained in Python 2.6, but maintains
+compatibility with Python 2.4 and Python 2.5 and (currently) has
+significant performance advantages, even without using the optional C
+extension for speedups.
+
+Encoding basic Python object hierarchies::
+
+    >>> import simplejson as json
+    >>> json.dumps(['foo', {'bar': ('baz', None, 1.0, 2)}])
+    '["foo", {"bar": ["baz", null, 1.0, 2]}]'
+    >>> print json.dumps("\"foo\bar")
+    "\"foo\bar"
+    >>> print json.dumps(u'\u1234')
+    "\u1234"
+    >>> print json.dumps('\\')
+    "\\"
+    >>> print json.dumps({"c": 0, "b": 0, "a": 0}, sort_keys=True)
+    {"a": 0, "b": 0, "c": 0}
+    >>> from StringIO import StringIO
+    >>> io = StringIO()
+    >>> json.dump(['streaming API'], io)
+    >>> io.getvalue()
+    '["streaming API"]'
+
+Compact encoding::
+
+    >>> import simplejson as json
+    >>> json.dumps([1,2,3,{'4': 5, '6': 7}], separators=(',',':'))
+    '[1,2,3,{"4":5,"6":7}]'
+
+Pretty printing::
+
+    >>> import simplejson as json
+    >>> s = json.dumps({'4': 5, '6': 7}, sort_keys=True, indent='    ')
+    >>> print '\n'.join([l.rstrip() for l in  s.splitlines()])
+    {
+        "4": 5,
+        "6": 7
+    }
+
+Decoding JSON::
+
+    >>> import simplejson as json
+    >>> obj = [u'foo', {u'bar': [u'baz', None, 1.0, 2]}]
+    >>> json.loads('["foo", {"bar":["baz", null, 1.0, 2]}]') == obj
+    True
+    >>> json.loads('"\\"foo\\bar"') == u'"foo\x08ar'
+    True
+    >>> from StringIO import StringIO
+    >>> io = StringIO('["streaming API"]')
+    >>> json.load(io)[0] == 'streaming API'
+    True
+
+Specializing JSON object decoding::
+
+    >>> import simplejson as json
+    >>> def as_complex(dct):
+    ...     if '__complex__' in dct:
+    ...         return complex(dct['real'], dct['imag'])
+    ...     return dct
+    ...
+    >>> json.loads('{"__complex__": true, "real": 1, "imag": 2}',
+    ...     object_hook=as_complex)
+    (1+2j)
+    >>> from decimal import Decimal
+    >>> json.loads('1.1', parse_float=Decimal) == Decimal('1.1')
+    True
+
+Specializing JSON object encoding::
+
+    >>> import simplejson as json
+    >>> def encode_complex(obj):
+    ...     if isinstance(obj, complex):
+    ...         return [obj.real, obj.imag]
+    ...     raise TypeError(repr(o) + " is not JSON serializable")
+    ...
+    >>> json.dumps(2 + 1j, default=encode_complex)
+    '[2.0, 1.0]'
+    >>> json.JSONEncoder(default=encode_complex).encode(2 + 1j)
+    '[2.0, 1.0]'
+    >>> ''.join(json.JSONEncoder(default=encode_complex).iterencode(2 + 1j))
+    '[2.0, 1.0]'
+
+
+Using simplejson.tool from the shell to validate and pretty-print::
+
+    $ echo '{"json":"obj"}' | python -m simplejson.tool
+    {
+        "json": "obj"
+    }
+    $ echo '{ 1.2:3.4}' | python -m simplejson.tool
+    Expecting property name: line 1 column 2 (char 2)
+"""
+__version__ = '2.1.1'
+__all__ = [
+    'dump', 'dumps', 'load', 'loads',
+    'JSONDecoder', 'JSONDecodeError', 'JSONEncoder',
+    'OrderedDict',
+]
+
+__author__ = 'Bob Ippolito <bob@redivi.com>'
+
+from decimal import Decimal
+
+from decoder import JSONDecoder, JSONDecodeError
+from encoder import JSONEncoder
+def _import_OrderedDict():
+    import collections
+    try:
+        return collections.OrderedDict
+    except AttributeError:
+        import ordered_dict
+        return ordered_dict.OrderedDict
+OrderedDict = _import_OrderedDict()
+
+def _import_c_make_encoder():
+    try:
+        from simplejson._speedups import make_encoder
+        return make_encoder
+    except ImportError:
+        return None
+
+_default_encoder = JSONEncoder(
+    skipkeys=False,
+    ensure_ascii=True,
+    check_circular=True,
+    allow_nan=True,
+    indent=None,
+    separators=None,
+    encoding='utf-8',
+    default=None,
+    use_decimal=False,
+)
+
+def dump(obj, fp, skipkeys=False, ensure_ascii=True, check_circular=True,
+        allow_nan=True, cls=None, indent=None, separators=None,
+        encoding='utf-8', default=None, use_decimal=False, **kw):
+    """Serialize ``obj`` as a JSON formatted stream to ``fp`` (a
+    ``.write()``-supporting file-like object).
+
+    If ``skipkeys`` is true then ``dict`` keys that are not basic types
+    (``str``, ``unicode``, ``int``, ``long``, ``float``, ``bool``, ``None``)
+    will be skipped instead of raising a ``TypeError``.
+
+    If ``ensure_ascii`` is false, then the some chunks written to ``fp``
+    may be ``unicode`` instances, subject to normal Python ``str`` to
+    ``unicode`` coercion rules. Unless ``fp.write()`` explicitly
+    understands ``unicode`` (as in ``codecs.getwriter()``) this is likely
+    to cause an error.
+
+    If ``check_circular`` is false, then the circular reference check
+    for container types will be skipped and a circular reference will
+    result in an ``OverflowError`` (or worse).
+
+    If ``allow_nan`` is false, then it will be a ``ValueError`` to
+    serialize out of range ``float`` values (``nan``, ``inf``, ``-inf``)
+    in strict compliance of the JSON specification, instead of using the
+    JavaScript equivalents (``NaN``, ``Infinity``, ``-Infinity``).
+
+    If *indent* is a string, then JSON array elements and object members
+    will be pretty-printed with a newline followed by that string repeated
+    for each level of nesting. ``None`` (the default) selects the most compact
+    representation without any newlines. For backwards compatibility with
+    versions of simplejson earlier than 2.1.0, an integer is also accepted
+    and is converted to a string with that many spaces.
+
+    If ``separators`` is an ``(item_separator, dict_separator)`` tuple
+    then it will be used instead of the default ``(', ', ': ')`` separators.
+    ``(',', ':')`` is the most compact JSON representation.
+
+    ``encoding`` is the character encoding for str instances, default is UTF-8.
+
+    ``default(obj)`` is a function that should return a serializable version
+    of obj or raise TypeError. The default simply raises TypeError.
+
+    If *use_decimal* is true (default: ``False``) then decimal.Decimal
+    will be natively serialized to JSON with full precision.
+
+    To use a custom ``JSONEncoder`` subclass (e.g. one that overrides the
+    ``.default()`` method to serialize additional types), specify it with
+    the ``cls`` kwarg.
+
+    """
+    # cached encoder
+    if (not skipkeys and ensure_ascii and
+        check_circular and allow_nan and
+        cls is None and indent is None and separators is None and
+        encoding == 'utf-8' and default is None and not kw):
+        iterable = _default_encoder.iterencode(obj)
+    else:
+        if cls is None:
+            cls = JSONEncoder
+        iterable = cls(skipkeys=skipkeys, ensure_ascii=ensure_ascii,
+            check_circular=check_circular, allow_nan=allow_nan, indent=indent,
+            separators=separators, encoding=encoding,
+            default=default, use_decimal=use_decimal, **kw).iterencode(obj)
+    # could accelerate with writelines in some versions of Python, at
+    # a debuggability cost
+    for chunk in iterable:
+        fp.write(chunk)
+
+
+def dumps(obj, skipkeys=False, ensure_ascii=True, check_circular=True,
+        allow_nan=True, cls=None, indent=None, separators=None,
+        encoding='utf-8', default=None, use_decimal=False, **kw):
+    """Serialize ``obj`` to a JSON formatted ``str``.
+
+    If ``skipkeys`` is false then ``dict`` keys that are not basic types
+    (``str``, ``unicode``, ``int``, ``long``, ``float``, ``bool``, ``None``)
+    will be skipped instead of raising a ``TypeError``.
+
+    If ``ensure_ascii`` is false, then the return value will be a
+    ``unicode`` instance subject to normal Python ``str`` to ``unicode``
+    coercion rules instead of being escaped to an ASCII ``str``.
+
+    If ``check_circular`` is false, then the circular reference check
+    for container types will be skipped and a circular reference will
+    result in an ``OverflowError`` (or worse).
+
+    If ``allow_nan`` is false, then it will be a ``ValueError`` to
+    serialize out of range ``float`` values (``nan``, ``inf``, ``-inf``) in
+    strict compliance of the JSON specification, instead of using the
+    JavaScript equivalents (``NaN``, ``Infinity``, ``-Infinity``).
+
+    If ``indent`` is a string, then JSON array elements and object members
+    will be pretty-printed with a newline followed by that string repeated
+    for each level of nesting. ``None`` (the default) selects the most compact
+    representation without any newlines. For backwards compatibility with
+    versions of simplejson earlier than 2.1.0, an integer is also accepted
+    and is converted to a string with that many spaces.
+
+    If ``separators`` is an ``(item_separator, dict_separator)`` tuple
+    then it will be used instead of the default ``(', ', ': ')`` separators.
+    ``(',', ':')`` is the most compact JSON representation.
+
+    ``encoding`` is the character encoding for str instances, default is UTF-8.
+
+    ``default(obj)`` is a function that should return a serializable version
+    of obj or raise TypeError. The default simply raises TypeError.
+
+    If *use_decimal* is true (default: ``False``) then decimal.Decimal
+    will be natively serialized to JSON with full precision.
+
+    To use a custom ``JSONEncoder`` subclass (e.g. one that overrides the
+    ``.default()`` method to serialize additional types), specify it with
+    the ``cls`` kwarg.
+
+    """
+    # cached encoder
+    if (not skipkeys and ensure_ascii and
+        check_circular and allow_nan and
+        cls is None and indent is None and separators is None and
+        encoding == 'utf-8' and default is None and not use_decimal
+        and not kw):
+        return _default_encoder.encode(obj)
+    if cls is None:
+        cls = JSONEncoder
+    return cls(
+        skipkeys=skipkeys, ensure_ascii=ensure_ascii,
+        check_circular=check_circular, allow_nan=allow_nan, indent=indent,
+        separators=separators, encoding=encoding, default=default,
+        use_decimal=use_decimal, **kw).encode(obj)
+
+
+_default_decoder = JSONDecoder(encoding=None, object_hook=None,
+                               object_pairs_hook=None)
+
+
+def load(fp, encoding=None, cls=None, object_hook=None, parse_float=None,
+        parse_int=None, parse_constant=None, object_pairs_hook=None,
+        use_decimal=False, **kw):
+    """Deserialize ``fp`` (a ``.read()``-supporting file-like object containing
+    a JSON document) to a Python object.
+
+    *encoding* determines the encoding used to interpret any
+    :class:`str` objects decoded by this instance (``'utf-8'`` by
+    default).  It has no effect when decoding :class:`unicode` objects.
+
+    Note that currently only encodings that are a superset of ASCII work,
+    strings of other encodings should be passed in as :class:`unicode`.
+
+    *object_hook*, if specified, will be called with the result of every
+    JSON object decoded and its return value will be used in place of the
+    given :class:`dict`.  This can be used to provide custom
+    deserializations (e.g. to support JSON-RPC class hinting).
+
+    *object_pairs_hook* is an optional function that will be called with
+    the result of any object literal decode with an ordered list of pairs.
+    The return value of *object_pairs_hook* will be used instead of the
+    :class:`dict`.  This feature can be used to implement custom decoders
+    that rely on the order that the key and value pairs are decoded (for
+    example, :func:`collections.OrderedDict` will remember the order of
+    insertion). If *object_hook* is also defined, the *object_pairs_hook*
+    takes priority.
+
+    *parse_float*, if specified, will be called with the string of every
+    JSON float to be decoded.  By default, this is equivalent to
+    ``float(num_str)``. This can be used to use another datatype or parser
+    for JSON floats (e.g. :class:`decimal.Decimal`).
+
+    *parse_int*, if specified, will be called with the string of every
+    JSON int to be decoded.  By default, this is equivalent to
+    ``int(num_str)``.  This can be used to use another datatype or parser
+    for JSON integers (e.g. :class:`float`).
+
+    *parse_constant*, if specified, will be called with one of the
+    following strings: ``'-Infinity'``, ``'Infinity'``, ``'NaN'``.  This
+    can be used to raise an exception if invalid JSON numbers are
+    encountered.
+
+    If *use_decimal* is true (default: ``False``) then it implies
+    parse_float=decimal.Decimal for parity with ``dump``.
+
+    To use a custom ``JSONDecoder`` subclass, specify it with the ``cls``
+    kwarg.
+
+    """
+    return loads(fp.read(),
+        encoding=encoding, cls=cls, object_hook=object_hook,
+        parse_float=parse_float, parse_int=parse_int,
+        parse_constant=parse_constant, object_pairs_hook=object_pairs_hook,
+        use_decimal=use_decimal, **kw)
+
+
+def loads(s, encoding=None, cls=None, object_hook=None, parse_float=None,
+        parse_int=None, parse_constant=None, object_pairs_hook=None,
+        use_decimal=False, **kw):
+    """Deserialize ``s`` (a ``str`` or ``unicode`` instance containing a JSON
+    document) to a Python object.
+
+    *encoding* determines the encoding used to interpret any
+    :class:`str` objects decoded by this instance (``'utf-8'`` by
+    default).  It has no effect when decoding :class:`unicode` objects.
+
+    Note that currently only encodings that are a superset of ASCII work,
+    strings of other encodings should be passed in as :class:`unicode`.
+
+    *object_hook*, if specified, will be called with the result of every
+    JSON object decoded and its return value will be used in place of the
+    given :class:`dict`.  This can be used to provide custom
+    deserializations (e.g. to support JSON-RPC class hinting).
+
+    *object_pairs_hook* is an optional function that will be called with
+    the result of any object literal decode with an ordered list of pairs.
+    The return value of *object_pairs_hook* will be used instead of the
+    :class:`dict`.  This feature can be used to implement custom decoders
+    that rely on the order that the key and value pairs are decoded (for
+    example, :func:`collections.OrderedDict` will remember the order of
+    insertion). If *object_hook* is also defined, the *object_pairs_hook*
+    takes priority.
+
+    *parse_float*, if specified, will be called with the string of every
+    JSON float to be decoded.  By default, this is equivalent to
+    ``float(num_str)``. This can be used to use another datatype or parser
+    for JSON floats (e.g. :class:`decimal.Decimal`).
+
+    *parse_int*, if specified, will be called with the string of every
+    JSON int to be decoded.  By default, this is equivalent to
+    ``int(num_str)``.  This can be used to use another datatype or parser
+    for JSON integers (e.g. :class:`float`).
+
+    *parse_constant*, if specified, will be called with one of the
+    following strings: ``'-Infinity'``, ``'Infinity'``, ``'NaN'``.  This
+    can be used to raise an exception if invalid JSON numbers are
+    encountered.
+
+    If *use_decimal* is true (default: ``False``) then it implies
+    parse_float=decimal.Decimal for parity with ``dump``.
+
+    To use a custom ``JSONDecoder`` subclass, specify it with the ``cls``
+    kwarg.
+
+    """
+    if (cls is None and encoding is None and object_hook is None and
+            parse_int is None and parse_float is None and
+            parse_constant is None and object_pairs_hook is None
+            and not use_decimal and not kw):
+        return _default_decoder.decode(s)
+    if cls is None:
+        cls = JSONDecoder
+    if object_hook is not None:
+        kw['object_hook'] = object_hook
+    if object_pairs_hook is not None:
+        kw['object_pairs_hook'] = object_pairs_hook
+    if parse_float is not None:
+        kw['parse_float'] = parse_float
+    if parse_int is not None:
+        kw['parse_int'] = parse_int
+    if parse_constant is not None:
+        kw['parse_constant'] = parse_constant
+    if use_decimal:
+        if parse_float is not None:
+            raise TypeError("use_decimal=True implies parse_float=Decimal")
+        kw['parse_float'] = Decimal
+    return cls(encoding=encoding, **kw).decode(s)
+
+
+def _toggle_speedups(enabled):
+    import simplejson.decoder as dec
+    import simplejson.encoder as enc
+    import simplejson.scanner as scan
+    c_make_encoder = _import_c_make_encoder()
+    if enabled:
+        dec.scanstring = dec.c_scanstring or dec.py_scanstring
+        enc.c_make_encoder = c_make_encoder
+        enc.encode_basestring_ascii = (enc.c_encode_basestring_ascii or 
+            enc.py_encode_basestring_ascii)
+        scan.make_scanner = scan.c_make_scanner or scan.py_make_scanner
+    else:
+        dec.scanstring = dec.py_scanstring
+        enc.c_make_encoder = None
+        enc.encode_basestring_ascii = enc.py_encode_basestring_ascii
+        scan.make_scanner = scan.py_make_scanner
+    dec.make_scanner = scan.make_scanner
+    global _default_decoder
+    _default_decoder = JSONDecoder(
+        encoding=None,
+        object_hook=None,
+        object_pairs_hook=None,
+    )
+    global _default_encoder
+    _default_encoder = JSONEncoder(
+       skipkeys=False,
+       ensure_ascii=True,
+       check_circular=True,
+       allow_nan=True,
+       indent=None,
+       separators=None,
+       encoding='utf-8',
+       default=None,
+   )
diff --git a/tablib/packages/simplejson/_speedups.c b/tablib/packages/simplejson/_speedups.c
new file mode 100644
index 0000000..b06ba50
--- /dev/null
+++ b/tablib/packages/simplejson/_speedups.c
@@ -0,0 +1,2561 @@
+#include "Python.h"
+#include "structmember.h"
+#if PY_VERSION_HEX < 0x02070000 && !defined(PyOS_string_to_double)
+#define PyOS_string_to_double json_PyOS_string_to_double
+static double
+json_PyOS_string_to_double(const char *s, char **endptr, PyObject *overflow_exception);
+static double
+json_PyOS_string_to_double(const char *s, char **endptr, PyObject *overflow_exception) {
+    double x;
+    assert(endptr == NULL);
+    assert(overflow_exception == NULL);
+    PyFPE_START_PROTECT("json_PyOS_string_to_double", return -1.0;)
+    x = PyOS_ascii_atof(s);
+    PyFPE_END_PROTECT(x)
+    return x;
+}
+#endif
+#if PY_VERSION_HEX < 0x02060000 && !defined(Py_TYPE)
+#define Py_TYPE(ob)     (((PyObject*)(ob))->ob_type)
+#endif
+#if PY_VERSION_HEX < 0x02050000 && !defined(PY_SSIZE_T_MIN)
+typedef int Py_ssize_t;
+#define PY_SSIZE_T_MAX INT_MAX
+#define PY_SSIZE_T_MIN INT_MIN
+#define PyInt_FromSsize_t PyInt_FromLong
+#define PyInt_AsSsize_t PyInt_AsLong
+#endif
+#ifndef Py_IS_FINITE
+#define Py_IS_FINITE(X) (!Py_IS_INFINITY(X) && !Py_IS_NAN(X))
+#endif
+
+#ifdef __GNUC__
+#define UNUSED __attribute__((__unused__))
+#else
+#define UNUSED
+#endif
+
+#define DEFAULT_ENCODING "utf-8"
+
+#define PyScanner_Check(op) PyObject_TypeCheck(op, &PyScannerType)
+#define PyScanner_CheckExact(op) (Py_TYPE(op) == &PyScannerType)
+#define PyEncoder_Check(op) PyObject_TypeCheck(op, &PyEncoderType)
+#define PyEncoder_CheckExact(op) (Py_TYPE(op) == &PyEncoderType)
+#define Decimal_Check(op) (PyObject_TypeCheck(op, DecimalTypePtr))
+
+static PyTypeObject PyScannerType;
+static PyTypeObject PyEncoderType;
+static PyTypeObject *DecimalTypePtr;
+
+typedef struct _PyScannerObject {
+    PyObject_HEAD
+    PyObject *encoding;
+    PyObject *strict;
+    PyObject *object_hook;
+    PyObject *pairs_hook;
+    PyObject *parse_float;
+    PyObject *parse_int;
+    PyObject *parse_constant;
+    PyObject *memo;
+} PyScannerObject;
+
+static PyMemberDef scanner_members[] = {
+    {"encoding", T_OBJECT, offsetof(PyScannerObject, encoding), READONLY, "encoding"},
+    {"strict", T_OBJECT, offsetof(PyScannerObject, strict), READONLY, "strict"},
+    {"object_hook", T_OBJECT, offsetof(PyScannerObject, object_hook), READONLY, "object_hook"},
+    {"object_pairs_hook", T_OBJECT, offsetof(PyScannerObject, pairs_hook), READONLY, "object_pairs_hook"},
+    {"parse_float", T_OBJECT, offsetof(PyScannerObject, parse_float), READONLY, "parse_float"},
+    {"parse_int", T_OBJECT, offsetof(PyScannerObject, parse_int), READONLY, "parse_int"},
+    {"parse_constant", T_OBJECT, offsetof(PyScannerObject, parse_constant), READONLY, "parse_constant"},
+    {NULL}
+};
+
+typedef struct _PyEncoderObject {
+    PyObject_HEAD
+    PyObject *markers;
+    PyObject *defaultfn;
+    PyObject *encoder;
+    PyObject *indent;
+    PyObject *key_separator;
+    PyObject *item_separator;
+    PyObject *sort_keys;
+    PyObject *skipkeys;
+    PyObject *key_memo;
+    int fast_encode;
+    int allow_nan;
+    int use_decimal;
+} PyEncoderObject;
+
+static PyMemberDef encoder_members[] = {
+    {"markers", T_OBJECT, offsetof(PyEncoderObject, markers), READONLY, "markers"},
+    {"default", T_OBJECT, offsetof(PyEncoderObject, defaultfn), READONLY, "default"},
+    {"encoder", T_OBJECT, offsetof(PyEncoderObject, encoder), READONLY, "encoder"},
+    {"indent", T_OBJECT, offsetof(PyEncoderObject, indent), READONLY, "indent"},
+    {"key_separator", T_OBJECT, offsetof(PyEncoderObject, key_separator), READONLY, "key_separator"},
+    {"item_separator", T_OBJECT, offsetof(PyEncoderObject, item_separator), READONLY, "item_separator"},
+    {"sort_keys", T_OBJECT, offsetof(PyEncoderObject, sort_keys), READONLY, "sort_keys"},
+    {"skipkeys", T_OBJECT, offsetof(PyEncoderObject, skipkeys), READONLY, "skipkeys"},
+    {"key_memo", T_OBJECT, offsetof(PyEncoderObject, key_memo), READONLY, "key_memo"},
+    {NULL}
+};
+
+static Py_ssize_t
+ascii_escape_char(Py_UNICODE c, char *output, Py_ssize_t chars);
+static PyObject *
+ascii_escape_unicode(PyObject *pystr);
+static PyObject *
+ascii_escape_str(PyObject *pystr);
+static PyObject *
+py_encode_basestring_ascii(PyObject* self UNUSED, PyObject *pystr);
+void init_speedups(void);
+static PyObject *
+scan_once_str(PyScannerObject *s, PyObject *pystr, Py_ssize_t idx, Py_ssize_t *next_idx_ptr);
+static PyObject *
+scan_once_unicode(PyScannerObject *s, PyObject *pystr, Py_ssize_t idx, Py_ssize_t *next_idx_ptr);
+static PyObject *
+_build_rval_index_tuple(PyObject *rval, Py_ssize_t idx);
+static PyObject *
+scanner_new(PyTypeObject *type, PyObject *args, PyObject *kwds);
+static int
+scanner_init(PyObject *self, PyObject *args, PyObject *kwds);
+static void
+scanner_dealloc(PyObject *self);
+static int
+scanner_clear(PyObject *self);
+static PyObject *
+encoder_new(PyTypeObject *type, PyObject *args, PyObject *kwds);
+static int
+encoder_init(PyObject *self, PyObject *args, PyObject *kwds);
+static void
+encoder_dealloc(PyObject *self);
+static int
+encoder_clear(PyObject *self);
+static int
+encoder_listencode_list(PyEncoderObject *s, PyObject *rval, PyObject *seq, Py_ssize_t indent_level);
+static int
+encoder_listencode_obj(PyEncoderObject *s, PyObject *rval, PyObject *obj, Py_ssize_t indent_level);
+static int
+encoder_listencode_dict(PyEncoderObject *s, PyObject *rval, PyObject *dct, Py_ssize_t indent_level);
+static PyObject *
+_encoded_const(PyObject *obj);
+static void
+raise_errmsg(char *msg, PyObject *s, Py_ssize_t end);
+static PyObject *
+encoder_encode_string(PyEncoderObject *s, PyObject *obj);
+static int
+_convertPyInt_AsSsize_t(PyObject *o, Py_ssize_t *size_ptr);
+static PyObject *
+_convertPyInt_FromSsize_t(Py_ssize_t *size_ptr);
+static PyObject *
+encoder_encode_float(PyEncoderObject *s, PyObject *obj);
+
+#define S_CHAR(c) (c >= ' ' && c <= '~' && c != '\\' && c != '"')
+#define IS_WHITESPACE(c) (((c) == ' ') || ((c) == '\t') || ((c) == '\n') || ((c) == '\r'))
+
+#define MIN_EXPANSION 6
+#ifdef Py_UNICODE_WIDE
+#define MAX_EXPANSION (2 * MIN_EXPANSION)
+#else
+#define MAX_EXPANSION MIN_EXPANSION
+#endif
+
+static int
+_convertPyInt_AsSsize_t(PyObject *o, Py_ssize_t *size_ptr)
+{
+    /* PyObject to Py_ssize_t converter */
+    *size_ptr = PyInt_AsSsize_t(o);
+    if (*size_ptr == -1 && PyErr_Occurred())
+        return 0;
+    return 1;
+}
+
+static PyObject *
+_convertPyInt_FromSsize_t(Py_ssize_t *size_ptr)
+{
+    /* Py_ssize_t to PyObject converter */
+    return PyInt_FromSsize_t(*size_ptr);
+}
+
+static Py_ssize_t
+ascii_escape_char(Py_UNICODE c, char *output, Py_ssize_t chars)
+{
+    /* Escape unicode code point c to ASCII escape sequences
+    in char *output. output must have at least 12 bytes unused to
+    accommodate an escaped surrogate pair "\uXXXX\uXXXX" */
+    output[chars++] = '\\';
+    switch (c) {
+        case '\\': output[chars++] = (char)c; break;
+        case '"': output[chars++] = (char)c; break;
+        case '\b': output[chars++] = 'b'; break;
+        case '\f': output[chars++] = 'f'; break;
+        case '\n': output[chars++] = 'n'; break;
+        case '\r': output[chars++] = 'r'; break;
+        case '\t': output[chars++] = 't'; break;
+        default:
+#ifdef Py_UNICODE_WIDE
+            if (c >= 0x10000) {
+                /* UTF-16 surrogate pair */
+                Py_UNICODE v = c - 0x10000;
+                c = 0xd800 | ((v >> 10) & 0x3ff);
+                output[chars++] = 'u';
+                output[chars++] = "0123456789abcdef"[(c >> 12) & 0xf];
+                output[chars++] = "0123456789abcdef"[(c >>  8) & 0xf];
+                output[chars++] = "0123456789abcdef"[(c >>  4) & 0xf];
+                output[chars++] = "0123456789abcdef"[(c      ) & 0xf];
+                c = 0xdc00 | (v & 0x3ff);
+                output[chars++] = '\\';
+            }
+#endif
+            output[chars++] = 'u';
+            output[chars++] = "0123456789abcdef"[(c >> 12) & 0xf];
+            output[chars++] = "0123456789abcdef"[(c >>  8) & 0xf];
+            output[chars++] = "0123456789abcdef"[(c >>  4) & 0xf];
+            output[chars++] = "0123456789abcdef"[(c      ) & 0xf];
+    }
+    return chars;
+}
+
+static PyObject *
+ascii_escape_unicode(PyObject *pystr)
+{
+    /* Take a PyUnicode pystr and return a new ASCII-only escaped PyString */
+    Py_ssize_t i;
+    Py_ssize_t input_chars;
+    Py_ssize_t output_size;
+    Py_ssize_t max_output_size;
+    Py_ssize_t chars;
+    PyObject *rval;
+    char *output;
+    Py_UNICODE *input_unicode;
+
+    input_chars = PyUnicode_GET_SIZE(pystr);
+    input_unicode = PyUnicode_AS_UNICODE(pystr);
+
+    /* One char input can be up to 6 chars output, estimate 4 of these */
+    output_size = 2 + (MIN_EXPANSION * 4) + input_chars;
+    max_output_size = 2 + (input_chars * MAX_EXPANSION);
+    rval = PyString_FromStringAndSize(NULL, output_size);
+    if (rval == NULL) {
+        return NULL;
+    }
+    output = PyString_AS_STRING(rval);
+    chars = 0;
+    output[chars++] = '"';
+    for (i = 0; i < input_chars; i++) {
+        Py_UNICODE c = input_unicode[i];
+        if (S_CHAR(c)) {
+            output[chars++] = (char)c;
+        }
+        else {
+            chars = ascii_escape_char(c, output, chars);
+        }
+        if (output_size - chars < (1 + MAX_EXPANSION)) {
+            /* There's more than four, so let's resize by a lot */
+            Py_ssize_t new_output_size = output_size * 2;
+            /* This is an upper bound */
+            if (new_output_size > max_output_size) {
+                new_output_size = max_output_size;
+            }
+            /* Make sure that the output size changed before resizing */
+            if (new_output_size != output_size) {
+                output_size = new_output_size;
+                if (_PyString_Resize(&rval, output_size) == -1) {
+                    return NULL;
+                }
+                output = PyString_AS_STRING(rval);
+            }
+        }
+    }
+    output[chars++] = '"';
+    if (_PyString_Resize(&rval, chars) == -1) {
+        return NULL;
+    }
+    return rval;
+}
+
+static PyObject *
+ascii_escape_str(PyObject *pystr)
+{
+    /* Take a PyString pystr and return a new ASCII-only escaped PyString */
+    Py_ssize_t i;
+    Py_ssize_t input_chars;
+    Py_ssize_t output_size;
+    Py_ssize_t chars;
+    PyObject *rval;
+    char *output;
+    char *input_str;
+
+    input_chars = PyString_GET_SIZE(pystr);
+    input_str = PyString_AS_STRING(pystr);
+
+    /* Fast path for a string that's already ASCII */
+    for (i = 0; i < input_chars; i++) {
+        Py_UNICODE c = (Py_UNICODE)(unsigned char)input_str[i];
+        if (!S_CHAR(c)) {
+            /* If we have to escape something, scan the string for unicode */
+            Py_ssize_t j;
+            for (j = i; j < input_chars; j++) {
+                c = (Py_UNICODE)(unsigned char)input_str[j];
+                if (c > 0x7f) {
+                    /* We hit a non-ASCII character, bail to unicode mode */
+                    PyObject *uni;
+                    uni = PyUnicode_DecodeUTF8(input_str, input_chars, "strict");
+                    if (uni == NULL) {
+                        return NULL;
+                    }
+                    rval = ascii_escape_unicode(uni);
+                    Py_DECREF(uni);
+                    return rval;
+                }
+            }
+            break;
+        }
+    }
+
+    if (i == input_chars) {
+        /* Input is already ASCII */
+        output_size = 2 + input_chars;
+    }
+    else {
+        /* One char input can be up to 6 chars output, estimate 4 of these */
+        output_size = 2 + (MIN_EXPANSION * 4) + input_chars;
+    }
+    rval = PyString_FromStringAndSize(NULL, output_size);
+    if (rval == NULL) {
+        return NULL;
+    }
+    output = PyString_AS_STRING(rval);
+    output[0] = '"';
+
+    /* We know that everything up to i is ASCII already */
+    chars = i + 1;
+    memcpy(&output[1], input_str, i);
+
+    for (; i < input_chars; i++) {
+        Py_UNICODE c = (Py_UNICODE)(unsigned char)input_str[i];
+        if (S_CHAR(c)) {
+            output[chars++] = (char)c;
+        }
+        else {
+            chars = ascii_escape_char(c, output, chars);
+        }
+        /* An ASCII char can't possibly expand to a surrogate! */
+        if (output_size - chars < (1 + MIN_EXPANSION)) {
+            /* There's more than four, so let's resize by a lot */
+            output_size *= 2;
+            if (output_size > 2 + (input_chars * MIN_EXPANSION)) {
+                output_size = 2 + (input_chars * MIN_EXPANSION);
+            }
+            if (_PyString_Resize(&rval, output_size) == -1) {
+                return NULL;
+            }
+            output = PyString_AS_STRING(rval);
+        }
+    }
+    output[chars++] = '"';
+    if (_PyString_Resize(&rval, chars) == -1) {
+        return NULL;
+    }
+    return rval;
+}
+
+static void
+raise_errmsg(char *msg, PyObject *s, Py_ssize_t end)
+{
+    /* Use the Python function simplejson.decoder.errmsg to raise a nice
+    looking ValueError exception */
+    static PyObject *JSONDecodeError = NULL;
+    PyObject *exc;
+    if (JSONDecodeError == NULL) {
+        PyObject *decoder = PyImport_ImportModule("simplejson.decoder");
+        if (decoder == NULL)
+            return;
+        JSONDecodeError = PyObject_GetAttrString(decoder, "JSONDecodeError");
+        Py_DECREF(decoder);
+        if (JSONDecodeError == NULL)
+            return;
+    }
+    exc = PyObject_CallFunction(JSONDecodeError, "(zOO&)", msg, s, _convertPyInt_FromSsize_t, &end);
+    if (exc) {
+        PyErr_SetObject(JSONDecodeError, exc);
+        Py_DECREF(exc);
+    }
+}
+
+static PyObject *
+join_list_unicode(PyObject *lst)
+{
+    /* return u''.join(lst) */
+    static PyObject *joinfn = NULL;
+    if (joinfn == NULL) {
+        PyObject *ustr = PyUnicode_FromUnicode(NULL, 0);
+        if (ustr == NULL)
+            return NULL;
+
+        joinfn = PyObject_GetAttrString(ustr, "join");
+        Py_DECREF(ustr);
+        if (joinfn == NULL)
+            return NULL;
+    }
+    return PyObject_CallFunctionObjArgs(joinfn, lst, NULL);
+}
+
+static PyObject *
+join_list_string(PyObject *lst)
+{
+    /* return ''.join(lst) */
+    static PyObject *joinfn = NULL;
+    if (joinfn == NULL) {
+        PyObject *ustr = PyString_FromStringAndSize(NULL, 0);
+        if (ustr == NULL)
+            return NULL;
+
+        joinfn = PyObject_GetAttrString(ustr, "join");
+        Py_DECREF(ustr);
+        if (joinfn == NULL)
+            return NULL;
+    }
+    return PyObject_CallFunctionObjArgs(joinfn, lst, NULL);
+}
+
+static PyObject *
+_build_rval_index_tuple(PyObject *rval, Py_ssize_t idx) {
+    /* return (rval, idx) tuple, stealing reference to rval */
+    PyObject *tpl;
+    PyObject *pyidx;
+    /*
+    steal a reference to rval, returns (rval, idx)
+    */
+    if (rval == NULL) {
+        return NULL;
+    }
+    pyidx = PyInt_FromSsize_t(idx);
+    if (pyidx == NULL) {
+        Py_DECREF(rval);
+        return NULL;
+    }
+    tpl = PyTuple_New(2);
+    if (tpl == NULL) {
+        Py_DECREF(pyidx);
+        Py_DECREF(rval);
+        return NULL;
+    }
+    PyTuple_SET_ITEM(tpl, 0, rval);
+    PyTuple_SET_ITEM(tpl, 1, pyidx);
+    return tpl;
+}
+
+#define APPEND_OLD_CHUNK \
+    if (chunk != NULL) { \
+        if (chunks == NULL) { \
+            chunks = PyList_New(0); \
+            if (chunks == NULL) { \
+                goto bail; \
+            } \
+        } \
+        if (PyList_Append(chunks, chunk)) { \
+            goto bail; \
+        } \
+        Py_CLEAR(chunk); \
+    }
+
+static PyObject *
+scanstring_str(PyObject *pystr, Py_ssize_t end, char *encoding, int strict, Py_ssize_t *next_end_ptr)
+{
+    /* Read the JSON string from PyString pystr.
+    end is the index of the first character after the quote.
+    encoding is the encoding of pystr (must be an ASCII superset)
+    if strict is zero then literal control characters are allowed
+    *next_end_ptr is a return-by-reference index of the character
+        after the end quote
+
+    Return value is a new PyString (if ASCII-only) or PyUnicode
+    */
+    PyObject *rval;
+    Py_ssize_t len = PyString_GET_SIZE(pystr);
+    Py_ssize_t begin = end - 1;
+    Py_ssize_t next = begin;
+    int has_unicode = 0;
+    char *buf = PyString_AS_STRING(pystr);
+    PyObject *chunks = NULL;
+    PyObject *chunk = NULL;
+
+    if (end < 0 || len <= end) {
+        PyErr_SetString(PyExc_ValueError, "end is out of bounds");
+        goto bail;
+    }
+    while (1) {
+        /* Find the end of the string or the next escape */
+        Py_UNICODE c = 0;
+        for (next = end; next < len; next++) {
+            c = (unsigned char)buf[next];
+            if (c == '"' || c == '\\') {
+                break;
+            }
+            else if (strict && c <= 0x1f) {
+                raise_errmsg("Invalid control character at", pystr, next);
+                goto bail;
+            }
+            else if (c > 0x7f) {
+                has_unicode = 1;
+            }
+        }
+        if (!(c == '"' || c == '\\')) {
+            raise_errmsg("Unterminated string starting at", pystr, begin);
+            goto bail;
+        }
+        /* Pick up this chunk if it's not zero length */
+        if (next != end) {
+            PyObject *strchunk;
+            APPEND_OLD_CHUNK
+            strchunk = PyString_FromStringAndSize(&buf[end], next - end);
+            if (strchunk == NULL) {
+                goto bail;
+            }
+            if (has_unicode) {
+                chunk = PyUnicode_FromEncodedObject(strchunk, encoding, NULL);
+                Py_DECREF(strchunk);
+                if (chunk == NULL) {
+                    goto bail;
+                }
+            }
+            else {
+                chunk = strchunk;
+            }
+        }
+        next++;
+        if (c == '"') {
+            end = next;
+            break;
+        }
+        if (next == len) {
+            raise_errmsg("Unterminated string starting at", pystr, begin);
+            goto bail;
+        }
+        c = buf[next];
+        if (c != 'u') {
+            /* Non-unicode backslash escapes */
+            end = next + 1;
+            switch (c) {
+                case '"': break;
+                case '\\': break;
+                case '/': break;
+                case 'b': c = '\b'; break;
+                case 'f': c = '\f'; break;
+                case 'n': c = '\n'; break;
+                case 'r': c = '\r'; break;
+                case 't': c = '\t'; break;
+                default: c = 0;
+            }
+            if (c == 0) {
+                raise_errmsg("Invalid \\escape", pystr, end - 2);
+                goto bail;
+            }
+        }
+        else {
+            c = 0;
+            next++;
+            end = next + 4;
+            if (end >= len) {
+                raise_errmsg("Invalid \\uXXXX escape", pystr, next - 1);
+                goto bail;
+            }
+            /* Decode 4 hex digits */
+            for (; next < end; next++) {
+                Py_UNICODE digit = buf[next];
+                c <<= 4;
+                switch (digit) {
+                    case '0': case '1': case '2': case '3': case '4':
+                    case '5': case '6': case '7': case '8': case '9':
+                        c |= (digit - '0'); break;
+                    case 'a': case 'b': case 'c': case 'd': case 'e':
+                    case 'f':
+                        c |= (digit - 'a' + 10); break;
+                    case 'A': case 'B': case 'C': case 'D': case 'E':
+                    case 'F':
+                        c |= (digit - 'A' + 10); break;
+                    default:
+                        raise_errmsg("Invalid \\uXXXX escape", pystr, end - 5);
+                        goto bail;
+                }
+            }
+#ifdef Py_UNICODE_WIDE
+            /* Surrogate pair */
+            if ((c & 0xfc00) == 0xd800) {
+                Py_UNICODE c2 = 0;
+                if (end + 6 >= len) {
+                    raise_errmsg("Unpaired high surrogate", pystr, end - 5);
+                    goto bail;
+                }
+                if (buf[next++] != '\\' || buf[next++] != 'u') {
+                    raise_errmsg("Unpaired high surrogate", pystr, end - 5);
+                    goto bail;
+                }
+                end += 6;
+                /* Decode 4 hex digits */
+                for (; next < end; next++) {
+                    c2 <<= 4;
+                    Py_UNICODE digit = buf[next];
+                    switch (digit) {
+                        case '0': case '1': case '2': case '3': case '4':
+                        case '5': case '6': case '7': case '8': case '9':
+                            c2 |= (digit - '0'); break;
+                        case 'a': case 'b': case 'c': case 'd': case 'e':
+                        case 'f':
+                            c2 |= (digit - 'a' + 10); break;
+                        case 'A': case 'B': case 'C': case 'D': case 'E':
+                        case 'F':
+                            c2 |= (digit - 'A' + 10); break;
+                        default:
+                            raise_errmsg("Invalid \\uXXXX escape", pystr, end - 5);
+                            goto bail;
+                    }
+                }
+                if ((c2 & 0xfc00) != 0xdc00) {
+                    raise_errmsg("Unpaired high surrogate", pystr, end - 5);
+                    goto bail;
+                }
+                c = 0x10000 + (((c - 0xd800) << 10) | (c2 - 0xdc00));
+            }
+            else if ((c & 0xfc00) == 0xdc00) {
+                raise_errmsg("Unpaired low surrogate", pystr, end - 5);
+                goto bail;
+            }
+#endif
+        }
+        if (c > 0x7f) {
+            has_unicode = 1;
+        }
+        APPEND_OLD_CHUNK
+        if (has_unicode) {
+            chunk = PyUnicode_FromUnicode(&c, 1);
+            if (chunk == NULL) {
+                goto bail;
+            }
+        }
+        else {
+            char c_char = Py_CHARMASK(c);
+            chunk = PyString_FromStringAndSize(&c_char, 1);
+            if (chunk == NULL) {
+                goto bail;
+            }
+        }
+    }
+
+    if (chunks == NULL) {
+        if (chunk != NULL)
+            rval = chunk;
+        else
+            rval = PyString_FromStringAndSize("", 0);
+    }
+    else {
+        APPEND_OLD_CHUNK
+        rval = join_list_string(chunks);
+        if (rval == NULL) {
+            goto bail;
+        }
+        Py_CLEAR(chunks);
+    }
+
+    *next_end_ptr = end;
+    return rval;
+bail:
+    *next_end_ptr = -1;
+    Py_XDECREF(chunk);
+    Py_XDECREF(chunks);
+    return NULL;
+}
+
+
+static PyObject *
+scanstring_unicode(PyObject *pystr, Py_ssize_t end, int strict, Py_ssize_t *next_end_ptr)
+{
+    /* Read the JSON string from PyUnicode pystr.
+    end is the index of the first character after the quote.
+    if strict is zero then literal control characters are allowed
+    *next_end_ptr is a return-by-reference index of the character
+        after the end quote
+
+    Return value is a new PyUnicode
+    */
+    PyObject *rval;
+    Py_ssize_t len = PyUnicode_GET_SIZE(pystr);
+    Py_ssize_t begin = end - 1;
+    Py_ssize_t next = begin;
+    const Py_UNICODE *buf = PyUnicode_AS_UNICODE(pystr);
+    PyObject *chunks = NULL;
+    PyObject *chunk = NULL;
+
+    if (end < 0 || len <= end) {
+        PyErr_SetString(PyExc_ValueError, "end is out of bounds");
+        goto bail;
+    }
+    while (1) {
+        /* Find the end of the string or the next escape */
+        Py_UNICODE c = 0;
+        for (next = end; next < len; next++) {
+            c = buf[next];
+            if (c == '"' || c == '\\') {
+                break;
+            }
+            else if (strict && c <= 0x1f) {
+                raise_errmsg("Invalid control character at", pystr, next);
+                goto bail;
+            }
+        }
+        if (!(c == '"' || c == '\\')) {
+            raise_errmsg("Unterminated string starting at", pystr, begin);
+            goto bail;
+        }
+        /* Pick up this chunk if it's not zero length */
+        if (next != end) {
+            APPEND_OLD_CHUNK
+            chunk = PyUnicode_FromUnicode(&buf[end], next - end);
+            if (chunk == NULL) {
+                goto bail;
+            }
+        }
+        next++;
+        if (c == '"') {
+            end = next;
+            break;
+        }
+        if (next == len) {
+            raise_errmsg("Unterminated string starting at", pystr, begin);
+            goto bail;
+        }
+        c = buf[next];
+        if (c != 'u') {
+            /* Non-unicode backslash escapes */
+            end = next + 1;
+            switch (c) {
+                case '"': break;
+                case '\\': break;
+                case '/': break;
+                case 'b': c = '\b'; break;
+                case 'f': c = '\f'; break;
+                case 'n': c = '\n'; break;
+                case 'r': c = '\r'; break;
+                case 't': c = '\t'; break;
+                default: c = 0;
+            }
+            if (c == 0) {
+                raise_errmsg("Invalid \\escape", pystr, end - 2);
+                goto bail;
+            }
+        }
+        else {
+            c = 0;
+            next++;
+            end = next + 4;
+            if (end >= len) {
+                raise_errmsg("Invalid \\uXXXX escape", pystr, next - 1);
+                goto bail;
+            }
+            /* Decode 4 hex digits */
+            for (; next < end; next++) {
+                Py_UNICODE digit = buf[next];
+                c <<= 4;
+                switch (digit) {
+                    case '0': case '1': case '2': case '3': case '4':
+                    case '5': case '6': case '7': case '8': case '9':
+                        c |= (digit - '0'); break;
+                    case 'a': case 'b': case 'c': case 'd': case 'e':
+                    case 'f':
+                        c |= (digit - 'a' + 10); break;
+                    case 'A': case 'B': case 'C': case 'D': case 'E':
+                    case 'F':
+                        c |= (digit - 'A' + 10); break;
+                    default:
+                        raise_errmsg("Invalid \\uXXXX escape", pystr, end - 5);
+                        goto bail;
+                }
+            }
+#ifdef Py_UNICODE_WIDE
+            /* Surrogate pair */
+            if ((c & 0xfc00) == 0xd800) {
+                Py_UNICODE c2 = 0;
+                if (end + 6 >= len) {
+                    raise_errmsg("Unpaired high surrogate", pystr, end - 5);
+                    goto bail;
+                }
+                if (buf[next++] != '\\' || buf[next++] != 'u') {
+                    raise_errmsg("Unpaired high surrogate", pystr, end - 5);
+                    goto bail;
+                }
+                end += 6;
+                /* Decode 4 hex digits */
+                for (; next < end; next++) {
+                    c2 <<= 4;
+                    Py_UNICODE digit = buf[next];
+                    switch (digit) {
+                        case '0': case '1': case '2': case '3': case '4':
+                        case '5': case '6': case '7': case '8': case '9':
+                            c2 |= (digit - '0'); break;
+                        case 'a': case 'b': case 'c': case 'd': case 'e':
+                        case 'f':
+                            c2 |= (digit - 'a' + 10); break;
+                        case 'A': case 'B': case 'C': case 'D': case 'E':
+                        case 'F':
+                            c2 |= (digit - 'A' + 10); break;
+                        default:
+                            raise_errmsg("Invalid \\uXXXX escape", pystr, end - 5);
+                            goto bail;
+                    }
+                }
+                if ((c2 & 0xfc00) != 0xdc00) {
+                    raise_errmsg("Unpaired high surrogate", pystr, end - 5);
+                    goto bail;
+                }
+                c = 0x10000 + (((c - 0xd800) << 10) | (c2 - 0xdc00));
+            }
+            else if ((c & 0xfc00) == 0xdc00) {
+                raise_errmsg("Unpaired low surrogate", pystr, end - 5);
+                goto bail;
+            }
+#endif
+        }
+        APPEND_OLD_CHUNK
+        chunk = PyUnicode_FromUnicode(&c, 1);
+        if (chunk == NULL) {
+            goto bail;
+        }
+    }
+
+    if (chunks == NULL) {
+        if (chunk != NULL)
+            rval = chunk;
+        else
+            rval = PyUnicode_FromUnicode(NULL, 0);
+    }
+    else {
+        APPEND_OLD_CHUNK
+        rval = join_list_unicode(chunks);
+        if (rval == NULL) {
+            goto bail;
+        }
+        Py_CLEAR(chunks);
+    }
+    *next_end_ptr = end;
+    return rval;
+bail:
+    *next_end_ptr = -1;
+    Py_XDECREF(chunk);
+    Py_XDECREF(chunks);
+    return NULL;
+}
+
+PyDoc_STRVAR(pydoc_scanstring,
+    "scanstring(basestring, end, encoding, strict=True) -> (str, end)\n"
+    "\n"
+    "Scan the string s for a JSON string. End is the index of the\n"
+    "character in s after the quote that started the JSON string.\n"
+    "Unescapes all valid JSON string escape sequences and raises ValueError\n"
+    "on attempt to decode an invalid string. If strict is False then literal\n"
+    "control characters are allowed in the string.\n"
+    "\n"
+    "Returns a tuple of the decoded string and the index of the character in s\n"
+    "after the end quote."
+);
+
+static PyObject *
+py_scanstring(PyObject* self UNUSED, PyObject *args)
+{
+    PyObject *pystr;
+    PyObject *rval;
+    Py_ssize_t end;
+    Py_ssize_t next_end = -1;
+    char *encoding = NULL;
+    int strict = 1;
+    if (!PyArg_ParseTuple(args, "OO&|zi:scanstring", &pystr, _convertPyInt_AsSsize_t, &end, &encoding, &strict)) {
+        return NULL;
+    }
+    if (encoding == NULL) {
+        encoding = DEFAULT_ENCODING;
+    }
+    if (PyString_Check(pystr)) {
+        rval = scanstring_str(pystr, end, encoding, strict, &next_end);
+    }
+    else if (PyUnicode_Check(pystr)) {
+        rval = scanstring_unicode(pystr, end, strict, &next_end);
+    }
+    else {
+        PyErr_Format(PyExc_TypeError,
+                     "first argument must be a string, not %.80s",
+                     Py_TYPE(pystr)->tp_name);
+        return NULL;
+    }
+    return _build_rval_index_tuple(rval, next_end);
+}
+
+PyDoc_STRVAR(pydoc_encode_basestring_ascii,
+    "encode_basestring_ascii(basestring) -> str\n"
+    "\n"
+    "Return an ASCII-only JSON representation of a Python string"
+);
+
+static PyObject *
+py_encode_basestring_ascii(PyObject* self UNUSED, PyObject *pystr)
+{
+    /* Return an ASCII-only JSON representation of a Python string */
+    /* METH_O */
+    if (PyString_Check(pystr)) {
+        return ascii_escape_str(pystr);
+    }
+    else if (PyUnicode_Check(pystr)) {
+        return ascii_escape_unicode(pystr);
+    }
+    else {
+        PyErr_Format(PyExc_TypeError,
+                     "first argument must be a string, not %.80s",
+                     Py_TYPE(pystr)->tp_name);
+        return NULL;
+    }
+}
+
+static void
+scanner_dealloc(PyObject *self)
+{
+    /* Deallocate scanner object */
+    scanner_clear(self);
+    Py_TYPE(self)->tp_free(self);
+}
+
+static int
+scanner_traverse(PyObject *self, visitproc visit, void *arg)
+{
+    PyScannerObject *s;
+    assert(PyScanner_Check(self));
+    s = (PyScannerObject *)self;
+    Py_VISIT(s->encoding);
+    Py_VISIT(s->strict);
+    Py_VISIT(s->object_hook);
+    Py_VISIT(s->pairs_hook);
+    Py_VISIT(s->parse_float);
+    Py_VISIT(s->parse_int);
+    Py_VISIT(s->parse_constant);
+    Py_VISIT(s->memo);
+    return 0;
+}
+
+static int
+scanner_clear(PyObject *self)
+{
+    PyScannerObject *s;
+    assert(PyScanner_Check(self));
+    s = (PyScannerObject *)self;
+    Py_CLEAR(s->encoding);
+    Py_CLEAR(s->strict);
+    Py_CLEAR(s->object_hook);
+    Py_CLEAR(s->pairs_hook);
+    Py_CLEAR(s->parse_float);
+    Py_CLEAR(s->parse_int);
+    Py_CLEAR(s->parse_constant);
+    Py_CLEAR(s->memo);
+    return 0;
+}
+
+static PyObject *
+_parse_object_str(PyScannerObject *s, PyObject *pystr, Py_ssize_t idx, Py_ssize_t *next_idx_ptr) {
+    /* Read a JSON object from PyString pystr.
+    idx is the index of the first character after the opening curly brace.
+    *next_idx_ptr is a return-by-reference index to the first character after
+        the closing curly brace.
+
+    Returns a new PyObject (usually a dict, but object_hook or
+    object_pairs_hook can change that)
+    */
+    char *str = PyString_AS_STRING(pystr);
+    Py_ssize_t end_idx = PyString_GET_SIZE(pystr) - 1;
+    PyObject *rval = NULL;
+    PyObject *pairs = NULL;
+    PyObject *item;
+    PyObject *key = NULL;
+    PyObject *val = NULL;
+    char *encoding = PyString_AS_STRING(s->encoding);
+    int strict = PyObject_IsTrue(s->strict);
+    int has_pairs_hook = (s->pairs_hook != Py_None);
+    Py_ssize_t next_idx;
+    if (has_pairs_hook) {
+        pairs = PyList_New(0);
+        if (pairs == NULL)
+            return NULL;
+    }
+    else {
+        rval = PyDict_New();
+        if (rval == NULL)
+            return NULL;
+    }
+
+    /* skip whitespace after { */
+    while (idx <= end_idx && IS_WHITESPACE(str[idx])) idx++;
+
+    /* only loop if the object is non-empty */
+    if (idx <= end_idx && str[idx] != '}') {
+        while (idx <= end_idx) {
+            PyObject *memokey;
+
+            /* read key */
+            if (str[idx] != '"') {
+                raise_errmsg("Expecting property name", pystr, idx);
+                goto bail;
+            }
+            key = scanstring_str(pystr, idx + 1, encoding, strict, &next_idx);
+            if (key == NULL)
+                goto bail;
+            memokey = PyDict_GetItem(s->memo, key);
+            if (memokey != NULL) {
+                Py_INCREF(memokey);
+                Py_DECREF(key);
+                key = memokey;
+            }
+            else {
+                if (PyDict_SetItem(s->memo, key, key) < 0)
+                    goto bail;
+            }
+            idx = next_idx;
+
+            /* skip whitespace between key and : delimiter, read :, skip whitespace */
+            while (idx <= end_idx && IS_WHITESPACE(str[idx])) idx++;
+            if (idx > end_idx || str[idx] != ':') {
+                raise_errmsg("Expecting : delimiter", pystr, idx);
+                goto bail;
+            }
+            idx++;
+            while (idx <= end_idx && IS_WHITESPACE(str[idx])) idx++;
+
+            /* read any JSON data type */
+            val = scan_once_str(s, pystr, idx, &next_idx);
+            if (val == NULL)
+                goto bail;
+
+            if (has_pairs_hook) {
+                item = PyTuple_Pack(2, key, val);
+                if (item == NULL)
+                    goto bail;
+                Py_CLEAR(key);
+                Py_CLEAR(val);
+                if (PyList_Append(pairs, item) == -1) {
+                    Py_DECREF(item);
+                    goto bail;
+                }
+                Py_DECREF(item);
+            }
+            else {
+                if (PyDict_SetItem(rval, key, val) < 0)
+                    goto bail;
+                Py_CLEAR(key);
+                Py_CLEAR(val);
+            }
+            idx = next_idx;
+
+            /* skip whitespace before } or , */
+            while (idx <= end_idx && IS_WHITESPACE(str[idx])) idx++;
+
+            /* bail if the object is closed or we didn't get the , delimiter */
+            if (idx > end_idx) break;
+            if (str[idx] == '}') {
+                break;
+            }
+            else if (str[idx] != ',') {
+                raise_errmsg("Expecting , delimiter", pystr, idx);
+                goto bail;
+            }
+            idx++;
+
+            /* skip whitespace after , delimiter */
+            while (idx <= end_idx && IS_WHITESPACE(str[idx])) idx++;
+        }
+    }
+    /* verify that idx < end_idx, str[idx] should be '}' */
+    if (idx > end_idx || str[idx] != '}') {
+        raise_errmsg("Expecting object", pystr, end_idx);
+        goto bail;
+    }
+
+    /* if pairs_hook is not None: rval = object_pairs_hook(pairs) */
+    if (s->pairs_hook != Py_None) {
+        val = PyObject_CallFunctionObjArgs(s->pairs_hook, pairs, NULL);
+        if (val == NULL)
+            goto bail;
+        Py_DECREF(pairs);
+        *next_idx_ptr = idx + 1;
+        return val;
+    }
+
+    /* if object_hook is not None: rval = object_hook(rval) */
+    if (s->object_hook != Py_None) {
+        val = PyObject_CallFunctionObjArgs(s->object_hook, rval, NULL);
+        if (val == NULL)
+            goto bail;
+        Py_DECREF(rval);
+        rval = val;
+        val = NULL;
+    }
+    *next_idx_ptr = idx + 1;
+    return rval;
+bail:
+    Py_XDECREF(rval);
+    Py_XDECREF(key);
+    Py_XDECREF(val);
+    Py_XDECREF(pairs);
+    return NULL;
+}
+
+static PyObject *
+_parse_object_unicode(PyScannerObject *s, PyObject *pystr, Py_ssize_t idx, Py_ssize_t *next_idx_ptr) {
+    /* Read a JSON object from PyUnicode pystr.
+    idx is the index of the first character after the opening curly brace.
+    *next_idx_ptr is a return-by-reference index to the first character after
+        the closing curly brace.
+
+    Returns a new PyObject (usually a dict, but object_hook can change that)
+    */
+    Py_UNICODE *str = PyUnicode_AS_UNICODE(pystr);
+    Py_ssize_t end_idx = PyUnicode_GET_SIZE(pystr) - 1;
+    PyObject *rval = NULL;
+    PyObject *pairs = NULL;
+    PyObject *item;
+    PyObject *key = NULL;
+    PyObject *val = NULL;
+    int strict = PyObject_IsTrue(s->strict);
+    int has_pairs_hook = (s->pairs_hook != Py_None);
+    Py_ssize_t next_idx;
+
+    if (has_pairs_hook) {
+        pairs = PyList_New(0);
+        if (pairs == NULL)
+            return NULL;
+    }
+    else {
+        rval = PyDict_New();
+        if (rval == NULL)
+            return NULL;
+    }
+    
+    /* skip whitespace after { */
+    while (idx <= end_idx && IS_WHITESPACE(str[idx])) idx++;
+
+    /* only loop if the object is non-empty */
+    if (idx <= end_idx && str[idx] != '}') {
+        while (idx <= end_idx) {
+            PyObject *memokey;
+
+            /* read key */
+            if (str[idx] != '"') {
+                raise_errmsg("Expecting property name", pystr, idx);
+                goto bail;
+            }
+            key = scanstring_unicode(pystr, idx + 1, strict, &next_idx);
+            if (key == NULL)
+                goto bail;
+            memokey = PyDict_GetItem(s->memo, key);
+            if (memokey != NULL) {
+                Py_INCREF(memokey);
+                Py_DECREF(key);
+                key = memokey;
+            }
+            else {
+                if (PyDict_SetItem(s->memo, key, key) < 0)
+                    goto bail;
+            }
+            idx = next_idx;
+
+            /* skip whitespace between key and : delimiter, read :, skip whitespace */
+            while (idx <= end_idx && IS_WHITESPACE(str[idx])) idx++;
+            if (idx > end_idx || str[idx] != ':') {
+                raise_errmsg("Expecting : delimiter", pystr, idx);
+                goto bail;
+            }
+            idx++;
+            while (idx <= end_idx && IS_WHITESPACE(str[idx])) idx++;
+
+            /* read any JSON term */
+            val = scan_once_unicode(s, pystr, idx, &next_idx);
+            if (val == NULL)
+                goto bail;
+
+            if (has_pairs_hook) {
+                item = PyTuple_Pack(2, key, val);
+                if (item == NULL)
+                    goto bail;
+                Py_CLEAR(key);
+                Py_CLEAR(val);
+                if (PyList_Append(pairs, item) == -1) {
+                    Py_DECREF(item);
+                    goto bail;
+                }
+                Py_DECREF(item);
+            }
+            else {
+                if (PyDict_SetItem(rval, key, val) < 0)
+                    goto bail;
+                Py_CLEAR(key);
+                Py_CLEAR(val);
+            }
+            idx = next_idx;
+
+            /* skip whitespace before } or , */
+            while (idx <= end_idx && IS_WHITESPACE(str[idx])) idx++;
+
+            /* bail if the object is closed or we didn't get the , delimiter */
+            if (idx > end_idx) break;
+            if (str[idx] == '}') {
+                break;
+            }
+            else if (str[idx] != ',') {
+                raise_errmsg("Expecting , delimiter", pystr, idx);
+                goto bail;
+            }
+            idx++;
+
+            /* skip whitespace after , delimiter */
+            while (idx <= end_idx && IS_WHITESPACE(str[idx])) idx++;
+        }
+    }
+
+    /* verify that idx < end_idx, str[idx] should be '}' */
+    if (idx > end_idx || str[idx] != '}') {
+        raise_errmsg("Expecting object", pystr, end_idx);
+        goto bail;
+    }
+
+    /* if pairs_hook is not None: rval = object_pairs_hook(pairs) */
+    if (s->pairs_hook != Py_None) {
+        val = PyObject_CallFunctionObjArgs(s->pairs_hook, pairs, NULL);
+        if (val == NULL)
+            goto bail;
+        Py_DECREF(pairs);
+        *next_idx_ptr = idx + 1;
+        return val;
+    }
+
+    /* if object_hook is not None: rval = object_hook(rval) */
+    if (s->object_hook != Py_None) {
+        val = PyObject_CallFunctionObjArgs(s->object_hook, rval, NULL);
+        if (val == NULL)
+            goto bail;
+        Py_DECREF(rval);
+        rval = val;
+        val = NULL;
+    }
+    *next_idx_ptr = idx + 1;
+    return rval;
+bail:
+    Py_XDECREF(rval);
+    Py_XDECREF(key);
+    Py_XDECREF(val);
+    Py_XDECREF(pairs);
+    return NULL;
+}
+
+static PyObject *
+_parse_array_str(PyScannerObject *s, PyObject *pystr, Py_ssize_t idx, Py_ssize_t *next_idx_ptr) {
+    /* Read a JSON array from PyString pystr.
+    idx is the index of the first character after the opening brace.
+    *next_idx_ptr is a return-by-reference index to the first character after
+        the closing brace.
+
+    Returns a new PyList
+    */
+    char *str = PyString_AS_STRING(pystr);
+    Py_ssize_t end_idx = PyString_GET_SIZE(pystr) - 1;
+    PyObject *val = NULL;
+    PyObject *rval = PyList_New(0);
+    Py_ssize_t next_idx;
+    if (rval == NULL)
+        return NULL;
+
+    /* skip whitespace after [ */
+    while (idx <= end_idx && IS_WHITESPACE(str[idx])) idx++;
+
+    /* only loop if the array is non-empty */
+    if (idx <= end_idx && str[idx] != ']') {
+        while (idx <= end_idx) {
+
+            /* read any JSON term and de-tuplefy the (rval, idx) */
+            val = scan_once_str(s, pystr, idx, &next_idx);
+            if (val == NULL) {
+                if (PyErr_ExceptionMatches(PyExc_StopIteration)) {
+                    PyErr_Clear();
+                    raise_errmsg("Expecting object", pystr, idx);
+                }
+                goto bail;
+            }
+
+            if (PyList_Append(rval, val) == -1)
+                goto bail;
+
+            Py_CLEAR(val);
+            idx = next_idx;
+
+            /* skip whitespace between term and , */
+            while (idx <= end_idx && IS_WHITESPACE(str[idx])) idx++;
+
+            /* bail if the array is closed or we didn't get the , delimiter */
+            if (idx > end_idx) break;
+            if (str[idx] == ']') {
+                break;
+            }
+            else if (str[idx] != ',') {
+                raise_errmsg("Expecting , delimiter", pystr, idx);
+                goto bail;
+            }
+            idx++;
+
+            /* skip whitespace after , */
+            while (idx <= end_idx && IS_WHITESPACE(str[idx])) idx++;
+        }
+    }
+
+    /* verify that idx < end_idx, str[idx] should be ']' */
+    if (idx > end_idx || str[idx] != ']') {
+        raise_errmsg("Expecting object", pystr, end_idx);
+        goto bail;
+    }
+    *next_idx_ptr = idx + 1;
+    return rval;
+bail:
+    Py_XDECREF(val);
+    Py_DECREF(rval);
+    return NULL;
+}
+
+static PyObject *
+_parse_array_unicode(PyScannerObject *s, PyObject *pystr, Py_ssize_t idx, Py_ssize_t *next_idx_ptr) {
+    /* Read a JSON array from PyString pystr.
+    idx is the index of the first character after the opening brace.
+    *next_idx_ptr is a return-by-reference index to the first character after
+        the closing brace.
+
+    Returns a new PyList
+    */
+    Py_UNICODE *str = PyUnicode_AS_UNICODE(pystr);
+    Py_ssize_t end_idx = PyUnicode_GET_SIZE(pystr) - 1;
+    PyObject *val = NULL;
+    PyObject *rval = PyList_New(0);
+    Py_ssize_t next_idx;
+    if (rval == NULL)
+        return NULL;
+
+    /* skip whitespace after [ */
+    while (idx <= end_idx && IS_WHITESPACE(str[idx])) idx++;
+
+    /* only loop if the array is non-empty */
+    if (idx <= end_idx && str[idx] != ']') {
+        while (idx <= end_idx) {
+
+            /* read any JSON term  */
+            val = scan_once_unicode(s, pystr, idx, &next_idx);
+            if (val == NULL) {
+                if (PyErr_ExceptionMatches(PyExc_StopIteration)) {
+                    PyErr_Clear();
+                    raise_errmsg("Expecting object", pystr, idx);
+                }
+                goto bail;
+            }
+
+            if (PyList_Append(rval, val) == -1)
+                goto bail;
+
+            Py_CLEAR(val);
+            idx = next_idx;
+
+            /* skip whitespace between term and , */
+            while (idx <= end_idx && IS_WHITESPACE(str[idx])) idx++;
+
+            /* bail if the array is closed or we didn't get the , delimiter */
+            if (idx > end_idx) break;
+            if (str[idx] == ']') {
+                break;
+            }
+            else if (str[idx] != ',') {
+                raise_errmsg("Expecting , delimiter", pystr, idx);
+                goto bail;
+            }
+            idx++;
+
+            /* skip whitespace after , */
+            while (idx <= end_idx && IS_WHITESPACE(str[idx])) idx++;
+        }
+    }
+
+    /* verify that idx < end_idx, str[idx] should be ']' */
+    if (idx > end_idx || str[idx] != ']') {
+        raise_errmsg("Expecting object", pystr, end_idx);
+        goto bail;
+    }
+    *next_idx_ptr = idx + 1;
+    return rval;
+bail:
+    Py_XDECREF(val);
+    Py_DECREF(rval);
+    return NULL;
+}
+
+static PyObject *
+_parse_constant(PyScannerObject *s, char *constant, Py_ssize_t idx, Py_ssize_t *next_idx_ptr) {
+    /* Read a JSON constant from PyString pystr.
+    constant is the constant string that was found
+        ("NaN", "Infinity", "-Infinity").
+    idx is the index of the first character of the constant
+    *next_idx_ptr is a return-by-reference index to the first character after
+        the constant.
+
+    Returns the result of parse_constant
+    */
+    PyObject *cstr;
+    PyObject *rval;
+    /* constant is "NaN", "Infinity", or "-Infinity" */
+    cstr = PyString_InternFromString(constant);
+    if (cstr == NULL)
+        return NULL;
+
+    /* rval = parse_constant(constant) */
+    rval = PyObject_CallFunctionObjArgs(s->parse_constant, cstr, NULL);
+    idx += PyString_GET_SIZE(cstr);
+    Py_DECREF(cstr);
+    *next_idx_ptr = idx;
+    return rval;
+}
+
+static PyObject *
+_match_number_str(PyScannerObject *s, PyObject *pystr, Py_ssize_t start, Py_ssize_t *next_idx_ptr) {
+    /* Read a JSON number from PyString pystr.
+    idx is the index of the first character of the number
+    *next_idx_ptr is a return-by-reference index to the first character after
+        the number.
+
+    Returns a new PyObject representation of that number:
+        PyInt, PyLong, or PyFloat.
+        May return other types if parse_int or parse_float are set
+    */
+    char *str = PyString_AS_STRING(pystr);
+    Py_ssize_t end_idx = PyString_GET_SIZE(pystr) - 1;
+    Py_ssize_t idx = start;
+    int is_float = 0;
+    PyObject *rval;
+    PyObject *numstr;
+
+    /* read a sign if it's there, make sure it's not the end of the string */
+    if (str[idx] == '-') {
+        idx++;
+        if (idx > end_idx) {
+            PyErr_SetNone(PyExc_StopIteration);
+            return NULL;
+        }
+    }
+
+    /* read as many integer digits as we find as long as it doesn't start with 0 */
+    if (str[idx] >= '1' && str[idx] <= '9') {
+        idx++;
+        while (idx <= end_idx && str[idx] >= '0' && str[idx] <= '9') idx++;
+    }
+    /* if it starts with 0 we only expect one integer digit */
+    else if (str[idx] == '0') {
+        idx++;
+    }
+    /* no integer digits, error */
+    else {
+        PyErr_SetNone(PyExc_StopIteration);
+        return NULL;
+    }
+
+    /* if the next char is '.' followed by a digit then read all float digits */
+    if (idx < end_idx && str[idx] == '.' && str[idx + 1] >= '0' && str[idx + 1] <= '9') {
+        is_float = 1;
+        idx += 2;
+        while (idx <= end_idx && str[idx] >= '0' && str[idx] <= '9') idx++;
+    }
+
+    /* if the next char is 'e' or 'E' then maybe read the exponent (or backtrack) */
+    if (idx < end_idx && (str[idx] == 'e' || str[idx] == 'E')) {
+
+        /* save the index of the 'e' or 'E' just in case we need to backtrack */
+        Py_ssize_t e_start = idx;
+        idx++;
+
+        /* read an exponent sign if present */
+        if (idx < end_idx && (str[idx] == '-' || str[idx] == '+')) idx++;
+
+        /* read all digits */
+        while (idx <= end_idx && str[idx] >= '0' && str[idx] <= '9') idx++;
+
+        /* if we got a digit, then parse as float. if not, backtrack */
+        if (str[idx - 1] >= '0' && str[idx - 1] <= '9') {
+            is_float = 1;
+        }
+        else {
+            idx = e_start;
+        }
+    }
+
+    /* copy the section we determined to be a number */
+    numstr = PyString_FromStringAndSize(&str[start], idx - start);
+    if (numstr == NULL)
+        return NULL;
+    if (is_float) {
+        /* parse as a float using a fast path if available, otherwise call user defined method */
+        if (s->parse_float != (PyObject *)&PyFloat_Type) {
+            rval = PyObject_CallFunctionObjArgs(s->parse_float, numstr, NULL);
+        }
+        else {
+            /* rval = PyFloat_FromDouble(PyOS_ascii_atof(PyString_AS_STRING(numstr))); */
+            double d = PyOS_string_to_double(PyString_AS_STRING(numstr),
+                                             NULL, NULL);
+            if (d == -1.0 && PyErr_Occurred())
+                return NULL;
+            rval = PyFloat_FromDouble(d);
+        }
+    }
+    else {
+        /* parse as an int using a fast path if available, otherwise call user defined method */
+        if (s->parse_int != (PyObject *)&PyInt_Type) {
+            rval = PyObject_CallFunctionObjArgs(s->parse_int, numstr, NULL);
+        }
+        else {
+            rval = PyInt_FromString(PyString_AS_STRING(numstr), NULL, 10);
+        }
+    }
+    Py_DECREF(numstr);
+    *next_idx_ptr = idx;
+    return rval;
+}
+
+static PyObject *
+_match_number_unicode(PyScannerObject *s, PyObject *pystr, Py_ssize_t start, Py_ssize_t *next_idx_ptr) {
+    /* Read a JSON number from PyUnicode pystr.
+    idx is the index of the first character of the number
+    *next_idx_ptr is a return-by-reference index to the first character after
+        the number.
+
+    Returns a new PyObject representation of that number:
+        PyInt, PyLong, or PyFloat.
+        May return other types if parse_int or parse_float are set
+    */
+    Py_UNICODE *str = PyUnicode_AS_UNICODE(pystr);
+    Py_ssize_t end_idx = PyUnicode_GET_SIZE(pystr) - 1;
+    Py_ssize_t idx = start;
+    int is_float = 0;
+    PyObject *rval;
+    PyObject *numstr;
+
+    /* read a sign if it's there, make sure it's not the end of the string */
+    if (str[idx] == '-') {
+        idx++;
+        if (idx > end_idx) {
+            PyErr_SetNone(PyExc_StopIteration);
+            return NULL;
+        }
+    }
+
+    /* read as many integer digits as we find as long as it doesn't start with 0 */
+    if (str[idx] >= '1' && str[idx] <= '9') {
+        idx++;
+        while (idx <= end_idx && str[idx] >= '0' && str[idx] <= '9') idx++;
+    }
+    /* if it starts with 0 we only expect one integer digit */
+    else if (str[idx] == '0') {
+        idx++;
+    }
+    /* no integer digits, error */
+    else {
+        PyErr_SetNone(PyExc_StopIteration);
+        return NULL;
+    }
+
+    /* if the next char is '.' followed by a digit then read all float digits */
+    if (idx < end_idx && str[idx] == '.' && str[idx + 1] >= '0' && str[idx + 1] <= '9') {
+        is_float = 1;
+        idx += 2;
+        while (idx <= end_idx && str[idx] >= '0' && str[idx] <= '9') idx++;
+    }
+
+    /* if the next char is 'e' or 'E' then maybe read the exponent (or backtrack) */
+    if (idx < end_idx && (str[idx] == 'e' || str[idx] == 'E')) {
+        Py_ssize_t e_start = idx;
+        idx++;
+
+        /* read an exponent sign if present */
+        if (idx < end_idx && (str[idx] == '-' || str[idx] == '+')) idx++;
+
+        /* read all digits */
+        while (idx <= end_idx && str[idx] >= '0' && str[idx] <= '9') idx++;
+
+        /* if we got a digit, then parse as float. if not, backtrack */
+        if (str[idx - 1] >= '0' && str[idx - 1] <= '9') {
+            is_float = 1;
+        }
+        else {
+            idx = e_start;
+        }
+    }
+
+    /* copy the section we determined to be a number */
+    numstr = PyUnicode_FromUnicode(&str[start], idx - start);
+    if (numstr == NULL)
+        return NULL;
+    if (is_float) {
+        /* parse as a float using a fast path if available, otherwise call user defined method */
+        if (s->parse_float != (PyObject *)&PyFloat_Type) {
+            rval = PyObject_CallFunctionObjArgs(s->parse_float, numstr, NULL);
+        }
+        else {
+            rval = PyFloat_FromString(numstr, NULL);
+        }
+    }
+    else {
+        /* no fast path for unicode -> int, just call */
+        rval = PyObject_CallFunctionObjArgs(s->parse_int, numstr, NULL);
+    }
+    Py_DECREF(numstr);
+    *next_idx_ptr = idx;
+    return rval;
+}
+
+static PyObject *
+scan_once_str(PyScannerObject *s, PyObject *pystr, Py_ssize_t idx, Py_ssize_t *next_idx_ptr)
+{
+    /* Read one JSON term (of any kind) from PyString pystr.
+    idx is the index of the first character of the term
+    *next_idx_ptr is a return-by-reference index to the first character after
+        the number.
+
+    Returns a new PyObject representation of the term.
+    */
+    char *str = PyString_AS_STRING(pystr);
+    Py_ssize_t length = PyString_GET_SIZE(pystr);
+    if (idx >= length) {
+        PyErr_SetNone(PyExc_StopIteration);
+        return NULL;
+    }
+    switch (str[idx]) {
+        case '"':
+            /* string */
+            return scanstring_str(pystr, idx + 1,
+                PyString_AS_STRING(s->encoding),
+                PyObject_IsTrue(s->strict),
+                next_idx_ptr);
+        case '{':
+            /* object */
+            return _parse_object_str(s, pystr, idx + 1, next_idx_ptr);
+        case '[':
+            /* array */
+            return _parse_array_str(s, pystr, idx + 1, next_idx_ptr);
+        case 'n':
+            /* null */
+            if ((idx + 3 < length) && str[idx + 1] == 'u' && str[idx + 2] == 'l' && str[idx + 3] == 'l') {
+                Py_INCREF(Py_None);
+                *next_idx_ptr = idx + 4;
+                return Py_None;
+            }
+            break;
+        case 't':
+            /* true */
+            if ((idx + 3 < length) && str[idx + 1] == 'r' && str[idx + 2] == 'u' && str[idx + 3] == 'e') {
+                Py_INCREF(Py_True);
+                *next_idx_ptr = idx + 4;
+                return Py_True;
+            }
+            break;
+        case 'f':
+            /* false */
+            if ((idx + 4 < length) && str[idx + 1] == 'a' && str[idx + 2] == 'l' && str[idx + 3] == 's' && str[idx + 4] == 'e') {
+                Py_INCREF(Py_False);
+                *next_idx_ptr = idx + 5;
+                return Py_False;
+            }
+            break;
+        case 'N':
+            /* NaN */
+            if ((idx + 2 < length) && str[idx + 1] == 'a' && str[idx + 2] == 'N') {
+                return _parse_constant(s, "NaN", idx, next_idx_ptr);
+            }
+            break;
+        case 'I':
+            /* Infinity */
+            if ((idx + 7 < length) && str[idx + 1] == 'n' && str[idx + 2] == 'f' && str[idx + 3] == 'i' && str[idx + 4] == 'n' && str[idx + 5] == 'i' && str[idx + 6] == 't' && str[idx + 7] == 'y') {
+                return _parse_constant(s, "Infinity", idx, next_idx_ptr);
+            }
+            break;
+        case '-':
+            /* -Infinity */
+            if ((idx + 8 < length) && str[idx + 1] == 'I' && str[idx + 2] == 'n' && str[idx + 3] == 'f' && str[idx + 4] == 'i' && str[idx + 5] == 'n' && str[idx + 6] == 'i' && str[idx + 7] == 't' && str[idx + 8] == 'y') {
+                return _parse_constant(s, "-Infinity", idx, next_idx_ptr);
+            }
+            break;
+    }
+    /* Didn't find a string, object, array, or named constant. Look for a number. */
+    return _match_number_str(s, pystr, idx, next_idx_ptr);
+}
+
+static PyObject *
+scan_once_unicode(PyScannerObject *s, PyObject *pystr, Py_ssize_t idx, Py_ssize_t *next_idx_ptr)
+{
+    /* Read one JSON term (of any kind) from PyUnicode pystr.
+    idx is the index of the first character of the term
+    *next_idx_ptr is a return-by-reference index to the first character after
+        the number.
+
+    Returns a new PyObject representation of the term.
+    */
+    Py_UNICODE *str = PyUnicode_AS_UNICODE(pystr);
+    Py_ssize_t length = PyUnicode_GET_SIZE(pystr);
+    if (idx >= length) {
+        PyErr_SetNone(PyExc_StopIteration);
+        return NULL;
+    }
+    switch (str[idx]) {
+        case '"':
+            /* string */
+            return scanstring_unicode(pystr, idx + 1,
+                PyObject_IsTrue(s->strict),
+                next_idx_ptr);
+        case '{':
+            /* object */
+            return _parse_object_unicode(s, pystr, idx + 1, next_idx_ptr);
+        case '[':
+            /* array */
+            return _parse_array_unicode(s, pystr, idx + 1, next_idx_ptr);
+        case 'n':
+            /* null */
+            if ((idx + 3 < length) && str[idx + 1] == 'u' && str[idx + 2] == 'l' && str[idx + 3] == 'l') {
+                Py_INCREF(Py_None);
+                *next_idx_ptr = idx + 4;
+                return Py_None;
+            }
+            break;
+        case 't':
+            /* true */
+            if ((idx + 3 < length) && str[idx + 1] == 'r' && str[idx + 2] == 'u' && str[idx + 3] == 'e') {
+                Py_INCREF(Py_True);
+                *next_idx_ptr = idx + 4;
+                return Py_True;
+            }
+            break;
+        case 'f':
+            /* false */
+            if ((idx + 4 < length) && str[idx + 1] == 'a' && str[idx + 2] == 'l' && str[idx + 3] == 's' && str[idx + 4] == 'e') {
+                Py_INCREF(Py_False);
+                *next_idx_ptr = idx + 5;
+                return Py_False;
+            }
+            break;
+        case 'N':
+            /* NaN */
+            if ((idx + 2 < length) && str[idx + 1] == 'a' && str[idx + 2] == 'N') {
+                return _parse_constant(s, "NaN", idx, next_idx_ptr);
+            }
+            break;
+        case 'I':
+            /* Infinity */
+            if ((idx + 7 < length) && str[idx + 1] == 'n' && str[idx + 2] == 'f' && str[idx + 3] == 'i' && str[idx + 4] == 'n' && str[idx + 5] == 'i' && str[idx + 6] == 't' && str[idx + 7] == 'y') {
+                return _parse_constant(s, "Infinity", idx, next_idx_ptr);
+            }
+            break;
+        case '-':
+            /* -Infinity */
+            if ((idx + 8 < length) && str[idx + 1] == 'I' && str[idx + 2] == 'n' && str[idx + 3] == 'f' && str[idx + 4] == 'i' && str[idx + 5] == 'n' && str[idx + 6] == 'i' && str[idx + 7] == 't' && str[idx + 8] == 'y') {
+                return _parse_constant(s, "-Infinity", idx, next_idx_ptr);
+            }
+            break;
+    }
+    /* Didn't find a string, object, array, or named constant. Look for a number. */
+    return _match_number_unicode(s, pystr, idx, next_idx_ptr);
+}
+
+static PyObject *
+scanner_call(PyObject *self, PyObject *args, PyObject *kwds)
+{
+    /* Python callable interface to scan_once_{str,unicode} */
+    PyObject *pystr;
+    PyObject *rval;
+    Py_ssize_t idx;
+    Py_ssize_t next_idx = -1;
+    static char *kwlist[] = {"string", "idx", NULL};
+    PyScannerObject *s;
+    assert(PyScanner_Check(self));
+    s = (PyScannerObject *)self;
+    if (!PyArg_ParseTupleAndKeywords(args, kwds, "OO&:scan_once", kwlist, &pystr, _convertPyInt_AsSsize_t, &idx))
+        return NULL;
+
+    if (PyString_Check(pystr)) {
+        rval = scan_once_str(s, pystr, idx, &next_idx);
+    }
+    else if (PyUnicode_Check(pystr)) {
+        rval = scan_once_unicode(s, pystr, idx, &next_idx);
+    }
+    else {
+        PyErr_Format(PyExc_TypeError,
+                 "first argument must be a string, not %.80s",
+                 Py_TYPE(pystr)->tp_name);
+        return NULL;
+    }
+    PyDict_Clear(s->memo);
+    return _build_rval_index_tuple(rval, next_idx);
+}
+
+static PyObject *
+scanner_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
+{
+    PyScannerObject *s;
+    s = (PyScannerObject *)type->tp_alloc(type, 0);
+    if (s != NULL) {
+        s->encoding = NULL;
+        s->strict = NULL;
+        s->object_hook = NULL;
+        s->pairs_hook = NULL;
+        s->parse_float = NULL;
+        s->parse_int = NULL;
+        s->parse_constant = NULL;
+    }
+    return (PyObject *)s;
+}
+
+static int
+scanner_init(PyObject *self, PyObject *args, PyObject *kwds)
+{
+    /* Initialize Scanner object */
+    PyObject *ctx;
+    static char *kwlist[] = {"context", NULL};
+    PyScannerObject *s;
+
+    assert(PyScanner_Check(self));
+    s = (PyScannerObject *)self;
+
+    if (!PyArg_ParseTupleAndKeywords(args, kwds, "O:make_scanner", kwlist, &ctx))
+        return -1;
+    
+    if (s->memo == NULL) {
+        s->memo = PyDict_New();
+        if (s->memo == NULL)
+            goto bail;
+    }
+
+    /* PyString_AS_STRING is used on encoding */
+    s->encoding = PyObject_GetAttrString(ctx, "encoding");
+    if (s->encoding == NULL)
+        goto bail;
+    if (s->encoding == Py_None) {
+        Py_DECREF(Py_None);
+        s->encoding = PyString_InternFromString(DEFAULT_ENCODING);
+    }
+    else if (PyUnicode_Check(s->encoding)) {
+        PyObject *tmp = PyUnicode_AsEncodedString(s->encoding, NULL, NULL);
+        Py_DECREF(s->encoding);
+        s->encoding = tmp;
+    }
+    if (s->encoding == NULL || !PyString_Check(s->encoding))
+        goto bail;
+
+    /* All of these will fail "gracefully" so we don't need to verify them */
+    s->strict = PyObject_GetAttrString(ctx, "strict");
+    if (s->strict == NULL)
+        goto bail;
+    s->object_hook = PyObject_GetAttrString(ctx, "object_hook");
+    if (s->object_hook == NULL)
+        goto bail;
+    s->pairs_hook = PyObject_GetAttrString(ctx, "object_pairs_hook");
+    if (s->pairs_hook == NULL)
+        goto bail;
+    s->parse_float = PyObject_GetAttrString(ctx, "parse_float");
+    if (s->parse_float == NULL)
+        goto bail;
+    s->parse_int = PyObject_GetAttrString(ctx, "parse_int");
+    if (s->parse_int == NULL)
+        goto bail;
+    s->parse_constant = PyObject_GetAttrString(ctx, "parse_constant");
+    if (s->parse_constant == NULL)
+        goto bail;
+
+    return 0;
+
+bail:
+    Py_CLEAR(s->encoding);
+    Py_CLEAR(s->strict);
+    Py_CLEAR(s->object_hook);
+    Py_CLEAR(s->pairs_hook);
+    Py_CLEAR(s->parse_float);
+    Py_CLEAR(s->parse_int);
+    Py_CLEAR(s->parse_constant);
+    return -1;
+}
+
+PyDoc_STRVAR(scanner_doc, "JSON scanner object");
+
+static
+PyTypeObject PyScannerType = {
+    PyObject_HEAD_INIT(NULL)
+    0,                    /* tp_internal */
+    "simplejson._speedups.Scanner",       /* tp_name */
+    sizeof(PyScannerObject), /* tp_basicsize */
+    0,                    /* tp_itemsize */
+    scanner_dealloc, /* tp_dealloc */
+    0,                    /* tp_print */
+    0,                    /* tp_getattr */
+    0,                    /* tp_setattr */
+    0,                    /* tp_compare */
+    0,                    /* tp_repr */
+    0,                    /* tp_as_number */
+    0,                    /* tp_as_sequence */
+    0,                    /* tp_as_mapping */
+    0,                    /* tp_hash */
+    scanner_call,         /* tp_call */
+    0,                    /* tp_str */
+    0,/* PyObject_GenericGetAttr, */                    /* tp_getattro */
+    0,/* PyObject_GenericSetAttr, */                    /* tp_setattro */
+    0,                    /* tp_as_buffer */
+    Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC,   /* tp_flags */
+    scanner_doc,          /* tp_doc */
+    scanner_traverse,                    /* tp_traverse */
+    scanner_clear,                    /* tp_clear */
+    0,                    /* tp_richcompare */
+    0,                    /* tp_weaklistoffset */
+    0,                    /* tp_iter */
+    0,                    /* tp_iternext */
+    0,                    /* tp_methods */
+    scanner_members,                    /* tp_members */
+    0,                    /* tp_getset */
+    0,                    /* tp_base */
+    0,                    /* tp_dict */
+    0,                    /* tp_descr_get */
+    0,                    /* tp_descr_set */
+    0,                    /* tp_dictoffset */
+    scanner_init,                    /* tp_init */
+    0,/* PyType_GenericAlloc, */        /* tp_alloc */
+    scanner_new,          /* tp_new */
+    0,/* PyObject_GC_Del, */              /* tp_free */
+};
+
+static PyObject *
+encoder_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
+{
+    PyEncoderObject *s;
+    s = (PyEncoderObject *)type->tp_alloc(type, 0);
+    if (s != NULL) {
+        s->markers = NULL;
+        s->defaultfn = NULL;
+        s->encoder = NULL;
+        s->indent = NULL;
+        s->key_separator = NULL;
+        s->item_separator = NULL;
+        s->sort_keys = NULL;
+        s->skipkeys = NULL;
+        s->key_memo = NULL;
+    }
+    return (PyObject *)s;
+}
+
+static int
+encoder_init(PyObject *self, PyObject *args, PyObject *kwds)
+{
+    /* initialize Encoder object */
+    static char *kwlist[] = {"markers", "default", "encoder", "indent", "key_separator", "item_separator", "sort_keys", "skipkeys", "allow_nan", "key_memo", "use_decimal", NULL};
+
+    PyEncoderObject *s;
+    PyObject *markers, *defaultfn, *encoder, *indent, *key_separator;
+    PyObject *item_separator, *sort_keys, *skipkeys, *allow_nan, *key_memo, *use_decimal;
+
+    assert(PyEncoder_Check(self));
+    s = (PyEncoderObject *)self;
+
+    if (!PyArg_ParseTupleAndKeywords(args, kwds, "OOOOOOOOOOO:make_encoder", kwlist,
+        &markers, &defaultfn, &encoder, &indent, &key_separator, &item_separator,
+        &sort_keys, &skipkeys, &allow_nan, &key_memo, &use_decimal))
+        return -1;
+
+    s->markers = markers;
+    s->defaultfn = defaultfn;
+    s->encoder = encoder;
+    s->indent = indent;
+    s->key_separator = key_separator;
+    s->item_separator = item_separator;
+    s->sort_keys = sort_keys;
+    s->skipkeys = skipkeys;
+    s->key_memo = key_memo;
+    s->fast_encode = (PyCFunction_Check(s->encoder) && PyCFunction_GetFunction(s->encoder) == (PyCFunction)py_encode_basestring_ascii);
+    s->allow_nan = PyObject_IsTrue(allow_nan);
+    s->use_decimal = PyObject_IsTrue(use_decimal);
+
+    Py_INCREF(s->markers);
+    Py_INCREF(s->defaultfn);
+    Py_INCREF(s->encoder);
+    Py_INCREF(s->indent);
+    Py_INCREF(s->key_separator);
+    Py_INCREF(s->item_separator);
+    Py_INCREF(s->sort_keys);
+    Py_INCREF(s->skipkeys);
+    Py_INCREF(s->key_memo);
+    return 0;
+}
+
+static PyObject *
+encoder_call(PyObject *self, PyObject *args, PyObject *kwds)
+{
+    /* Python callable interface to encode_listencode_obj */
+    static char *kwlist[] = {"obj", "_current_indent_level", NULL};
+    PyObject *obj;
+    PyObject *rval;
+    Py_ssize_t indent_level;
+    PyEncoderObject *s;
+    assert(PyEncoder_Check(self));
+    s = (PyEncoderObject *)self;
+    if (!PyArg_ParseTupleAndKeywords(args, kwds, "OO&:_iterencode", kwlist,
+        &obj, _convertPyInt_AsSsize_t, &indent_level))
+        return NULL;
+    rval = PyList_New(0);
+    if (rval == NULL)
+        return NULL;
+    if (encoder_listencode_obj(s, rval, obj, indent_level)) {
+        Py_DECREF(rval);
+        return NULL;
+    }
+    return rval;
+}
+
+static PyObject *
+_encoded_const(PyObject *obj)
+{
+    /* Return the JSON string representation of None, True, False */
+    if (obj == Py_None) {
+        static PyObject *s_null = NULL;
+        if (s_null == NULL) {
+            s_null = PyString_InternFromString("null");
+        }
+        Py_INCREF(s_null);
+        return s_null;
+    }
+    else if (obj == Py_True) {
+        static PyObject *s_true = NULL;
+        if (s_true == NULL) {
+            s_true = PyString_InternFromString("true");
+        }
+        Py_INCREF(s_true);
+        return s_true;
+    }
+    else if (obj == Py_False) {
+        static PyObject *s_false = NULL;
+        if (s_false == NULL) {
+            s_false = PyString_InternFromString("false");
+        }
+        Py_INCREF(s_false);
+        return s_false;
+    }
+    else {
+        PyErr_SetString(PyExc_ValueError, "not a const");
+        return NULL;
+    }
+}
+
+static PyObject *
+encoder_encode_float(PyEncoderObject *s, PyObject *obj)
+{
+    /* Return the JSON representation of a PyFloat */
+    double i = PyFloat_AS_DOUBLE(obj);
+    if (!Py_IS_FINITE(i)) {
+        if (!s->allow_nan) {
+            PyErr_SetString(PyExc_ValueError, "Out of range float values are not JSON compliant");
+            return NULL;
+        }
+        if (i > 0) {
+            return PyString_FromString("Infinity");
+        }
+        else if (i < 0) {
+            return PyString_FromString("-Infinity");
+        }
+        else {
+            return PyString_FromString("NaN");
+        }
+    }
+    /* Use a better float format here? */
+    return PyObject_Repr(obj);
+}
+
+static PyObject *
+encoder_encode_string(PyEncoderObject *s, PyObject *obj)
+{
+    /* Return the JSON representation of a string */
+    if (s->fast_encode)
+        return py_encode_basestring_ascii(NULL, obj);
+    else
+        return PyObject_CallFunctionObjArgs(s->encoder, obj, NULL);
+}
+
+static int
+_steal_list_append(PyObject *lst, PyObject *stolen)
+{
+    /* Append stolen and then decrement its reference count */
+    int rval = PyList_Append(lst, stolen);
+    Py_DECREF(stolen);
+    return rval;
+}
+
+static int
+encoder_listencode_obj(PyEncoderObject *s, PyObject *rval, PyObject *obj, Py_ssize_t indent_level)
+{
+    /* Encode Python object obj to a JSON term, rval is a PyList */
+    PyObject *newobj;
+    int rv;
+
+    if (obj == Py_None || obj == Py_True || obj == Py_False) {
+        PyObject *cstr = _encoded_const(obj);
+        if (cstr == NULL)
+            return -1;
+        return _steal_list_append(rval, cstr);
+    }
+    else if (PyString_Check(obj) || PyUnicode_Check(obj))
+    {
+        PyObject *encoded = encoder_encode_string(s, obj);
+        if (encoded == NULL)
+            return -1;
+        return _steal_list_append(rval, encoded);
+    }
+    else if (PyInt_Check(obj) || PyLong_Check(obj)) {
+        PyObject *encoded = PyObject_Str(obj);
+        if (encoded == NULL)
+            return -1;
+        return _steal_list_append(rval, encoded);
+    }
+    else if (PyFloat_Check(obj)) {
+        PyObject *encoded = encoder_encode_float(s, obj);
+        if (encoded == NULL)
+            return -1;
+        return _steal_list_append(rval, encoded);
+    }
+    else if (PyList_Check(obj) || PyTuple_Check(obj)) {
+        return encoder_listencode_list(s, rval, obj, indent_level);
+    }
+    else if (PyDict_Check(obj)) {
+        return encoder_listencode_dict(s, rval, obj, indent_level);
+    }
+    else if (s->use_decimal && Decimal_Check(obj)) {
+        PyObject *encoded = PyObject_Str(obj);
+        if (encoded == NULL)
+            return -1;
+        return _steal_list_append(rval, encoded);
+    }
+    else {
+        PyObject *ident = NULL;
+        if (s->markers != Py_None) {
+            int has_key;
+            ident = PyLong_FromVoidPtr(obj);
+            if (ident == NULL)
+                return -1;
+            has_key = PyDict_Contains(s->markers, ident);
+            if (has_key) {
+                if (has_key != -1)
+                    PyErr_SetString(PyExc_ValueError, "Circular reference detected");
+                Py_DECREF(ident);
+                return -1;
+            }
+            if (PyDict_SetItem(s->markers, ident, obj)) {
+                Py_DECREF(ident);
+                return -1;
+            }
+        }
+        newobj = PyObject_CallFunctionObjArgs(s->defaultfn, obj, NULL);
+        if (newobj == NULL) {
+            Py_XDECREF(ident);
+            return -1;
+        }
+        rv = encoder_listencode_obj(s, rval, newobj, indent_level);
+        Py_DECREF(newobj);
+        if (rv) {
+            Py_XDECREF(ident);
+            return -1;
+        }
+        if (ident != NULL) {
+            if (PyDict_DelItem(s->markers, ident)) {
+                Py_XDECREF(ident);
+                return -1;
+            }
+            Py_XDECREF(ident);
+        }
+        return rv;
+    }
+}
+
+static int
+encoder_listencode_dict(PyEncoderObject *s, PyObject *rval, PyObject *dct, Py_ssize_t indent_level)
+{
+    /* Encode Python dict dct a JSON term, rval is a PyList */
+    static PyObject *open_dict = NULL;
+    static PyObject *close_dict = NULL;
+    static PyObject *empty_dict = NULL;
+    static PyObject *iteritems = NULL;
+    PyObject *kstr = NULL;
+    PyObject *ident = NULL;
+    PyObject *key, *value;
+    PyObject *iter = NULL;
+    PyObject *item = NULL;
+    PyObject *encoded = NULL;
+    int skipkeys;
+    Py_ssize_t idx;
+
+    if (open_dict == NULL || close_dict == NULL || empty_dict == NULL || iteritems == NULL) {
+        open_dict = PyString_InternFromString("{");
+        close_dict = PyString_InternFromString("}");
+        empty_dict = PyString_InternFromString("{}");
+        iteritems = PyString_InternFromString("iteritems");
+        if (open_dict == NULL || close_dict == NULL || empty_dict == NULL || iteritems == NULL)
+            return -1;
+    }
+    if (PyDict_Size(dct) == 0)
+        return PyList_Append(rval, empty_dict);
+
+    if (s->markers != Py_None) {
+        int has_key;
+        ident = PyLong_FromVoidPtr(dct);
+        if (ident == NULL)
+            goto bail;
+        has_key = PyDict_Contains(s->markers, ident);
+        if (has_key) {
+            if (has_key != -1)
+                PyErr_SetString(PyExc_ValueError, "Circular reference detected");
+            goto bail;
+        }
+        if (PyDict_SetItem(s->markers, ident, dct)) {
+            goto bail;
+        }
+    }
+
+    if (PyList_Append(rval, open_dict))
+        goto bail;
+
+    if (s->indent != Py_None) {
+        /* TODO: DOES NOT RUN */
+        indent_level += 1;
+        /*
+            newline_indent = '\n' + (_indent * _current_indent_level)
+            separator = _item_separator + newline_indent
+            buf += newline_indent
+        */
+    }
+
+    /* TODO: C speedup not implemented for sort_keys */
+
+    skipkeys = PyObject_IsTrue(s->skipkeys);
+    idx = 0;
+    iter = PyObject_CallMethodObjArgs(dct, iteritems, NULL);
+    if (iter == NULL)
+        goto bail;
+    while ((item = PyIter_Next(iter))) {
+
+        key = PyTuple_GetItem(item, 0);
+        if (key == NULL)
+            goto bail;
+        value = PyTuple_GetItem(item, 1);
+        if (value == NULL)
+            goto bail;
+        
+        encoded = PyDict_GetItem(s->key_memo, key);
+        if (encoded != NULL) {
+            Py_INCREF(encoded);
+        }
+        else if (PyString_Check(key) || PyUnicode_Check(key)) {
+            Py_INCREF(key);
+            kstr = key;
+        }
+        else if (PyFloat_Check(key)) {
+            kstr = encoder_encode_float(s, key);
+            if (kstr == NULL)
+                goto bail;
+        }
+        else if (PyInt_Check(key) || PyLong_Check(key)) {
+            kstr = PyObject_Str(key);
+            if (kstr == NULL)
+                goto bail;
+        }
+        else if (key == Py_True || key == Py_False || key == Py_None) {
+            kstr = _encoded_const(key);
+            if (kstr == NULL)
+                goto bail;
+        }
+        else if (skipkeys) {
+            Py_DECREF(item);
+            continue;
+        }
+        else {
+            /* TODO: include repr of key */
+            PyErr_SetString(PyExc_ValueError, "keys must be a string");
+            goto bail;
+        }
+
+        if (idx) {
+            if (PyList_Append(rval, s->item_separator))
+                goto bail;
+        }
+
+        if (encoded == NULL) {
+            encoded = encoder_encode_string(s, kstr);
+            Py_CLEAR(kstr);
+            if (encoded == NULL)
+                goto bail;
+            if (PyDict_SetItem(s->key_memo, key, encoded))
+                goto bail;
+        }
+        if (PyList_Append(rval, encoded)) {
+            goto bail;
+        }
+        Py_CLEAR(encoded);
+        if (PyList_Append(rval, s->key_separator))
+            goto bail;
+        if (encoder_listencode_obj(s, rval, value, indent_level))
+            goto bail;
+        Py_CLEAR(item);
+        idx += 1;
+    }
+    Py_CLEAR(iter);
+    if (PyErr_Occurred())
+        goto bail;
+    if (ident != NULL) {
+        if (PyDict_DelItem(s->markers, ident))
+            goto bail;
+        Py_CLEAR(ident);
+    }
+    if (s->indent != Py_None) {
+        /* TODO: DOES NOT RUN */
+        indent_level -= 1;
+        /*
+            yield '\n' + (_indent * _current_indent_level)
+        */
+    }
+    if (PyList_Append(rval, close_dict))
+        goto bail;
+    return 0;
+
+bail:
+    Py_XDECREF(encoded);
+    Py_XDECREF(item);
+    Py_XDECREF(iter);
+    Py_XDECREF(kstr);
+    Py_XDECREF(ident);
+    return -1;
+}
+
+
+static int
+encoder_listencode_list(PyEncoderObject *s, PyObject *rval, PyObject *seq, Py_ssize_t indent_level)
+{
+    /* Encode Python list seq to a JSON term, rval is a PyList */
+    static PyObject *open_array = NULL;
+    static PyObject *close_array = NULL;
+    static PyObject *empty_array = NULL;
+    PyObject *ident = NULL;
+    PyObject *iter = NULL;
+    PyObject *obj = NULL;
+    int is_true;
+    int i = 0;
+
+    if (open_array == NULL || close_array == NULL || empty_array == NULL) {
+        open_array = PyString_InternFromString("[");
+        close_array = PyString_InternFromString("]");
+        empty_array = PyString_InternFromString("[]");
+        if (open_array == NULL || close_array == NULL || empty_array == NULL)
+            return -1;
+    }
+    ident = NULL;
+    is_true = PyObject_IsTrue(seq);
+    if (is_true == -1)
+        return -1;
+    else if (is_true == 0)
+        return PyList_Append(rval, empty_array);
+
+    if (s->markers != Py_None) {
+        int has_key;
+        ident = PyLong_FromVoidPtr(seq);
+        if (ident == NULL)
+            goto bail;
+        has_key = PyDict_Contains(s->markers, ident);
+        if (has_key) {
+            if (has_key != -1)
+                PyErr_SetString(PyExc_ValueError, "Circular reference detected");
+            goto bail;
+        }
+        if (PyDict_SetItem(s->markers, ident, seq)) {
+            goto bail;
+        }
+    }
+
+    iter = PyObject_GetIter(seq);
+    if (iter == NULL)
+        goto bail;
+
+    if (PyList_Append(rval, open_array))
+        goto bail;
+    if (s->indent != Py_None) {
+        /* TODO: DOES NOT RUN */
+        indent_level += 1;
+        /*
+            newline_indent = '\n' + (_indent * _current_indent_level)
+            separator = _item_separator + newline_indent
+            buf += newline_indent
+        */
+    }
+    while ((obj = PyIter_Next(iter))) {
+        if (i) {
+            if (PyList_Append(rval, s->item_separator))
+                goto bail;
+        }
+        if (encoder_listencode_obj(s, rval, obj, indent_level))
+            goto bail;
+        i++;
+        Py_CLEAR(obj);
+    }
+    Py_CLEAR(iter);
+    if (PyErr_Occurred())
+        goto bail;
+    if (ident != NULL) {
+        if (PyDict_DelItem(s->markers, ident))
+            goto bail;
+        Py_CLEAR(ident);
+    }
+    if (s->indent != Py_None) {
+        /* TODO: DOES NOT RUN */
+        indent_level -= 1;
+        /*
+            yield '\n' + (_indent * _current_indent_level)
+        */
+    }
+    if (PyList_Append(rval, close_array))
+        goto bail;
+    return 0;
+
+bail:
+    Py_XDECREF(obj);
+    Py_XDECREF(iter);
+    Py_XDECREF(ident);
+    return -1;
+}
+
+static void
+encoder_dealloc(PyObject *self)
+{
+    /* Deallocate Encoder */
+    encoder_clear(self);
+    Py_TYPE(self)->tp_free(self);
+}
+
+static int
+encoder_traverse(PyObject *self, visitproc visit, void *arg)
+{
+    PyEncoderObject *s;
+    assert(PyEncoder_Check(self));
+    s = (PyEncoderObject *)self;
+    Py_VISIT(s->markers);
+    Py_VISIT(s->defaultfn);
+    Py_VISIT(s->encoder);
+    Py_VISIT(s->indent);
+    Py_VISIT(s->key_separator);
+    Py_VISIT(s->item_separator);
+    Py_VISIT(s->sort_keys);
+    Py_VISIT(s->skipkeys);
+    Py_VISIT(s->key_memo);
+    return 0;
+}
+
+static int
+encoder_clear(PyObject *self)
+{
+    /* Deallocate Encoder */
+    PyEncoderObject *s;
+    assert(PyEncoder_Check(self));
+    s = (PyEncoderObject *)self;
+    Py_CLEAR(s->markers);
+    Py_CLEAR(s->defaultfn);
+    Py_CLEAR(s->encoder);
+    Py_CLEAR(s->indent);
+    Py_CLEAR(s->key_separator);
+    Py_CLEAR(s->item_separator);
+    Py_CLEAR(s->sort_keys);
+    Py_CLEAR(s->skipkeys);
+    Py_CLEAR(s->key_memo);
+    return 0;
+}
+
+PyDoc_STRVAR(encoder_doc, "_iterencode(obj, _current_indent_level) -> iterable");
+
+static
+PyTypeObject PyEncoderType = {
+    PyObject_HEAD_INIT(NULL)
+    0,                    /* tp_internal */
+    "simplejson._speedups.Encoder",       /* tp_name */
+    sizeof(PyEncoderObject), /* tp_basicsize */
+    0,                    /* tp_itemsize */
+    encoder_dealloc, /* tp_dealloc */
+    0,                    /* tp_print */
+    0,                    /* tp_getattr */
+    0,                    /* tp_setattr */
+    0,                    /* tp_compare */
+    0,                    /* tp_repr */
+    0,                    /* tp_as_number */
+    0,                    /* tp_as_sequence */
+    0,                    /* tp_as_mapping */
+    0,                    /* tp_hash */
+    encoder_call,         /* tp_call */
+    0,                    /* tp_str */
+    0,                    /* tp_getattro */
+    0,                    /* tp_setattro */
+    0,                    /* tp_as_buffer */
+    Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC,   /* tp_flags */
+    encoder_doc,          /* tp_doc */
+    encoder_traverse,     /* tp_traverse */
+    encoder_clear,        /* tp_clear */
+    0,                    /* tp_richcompare */
+    0,                    /* tp_weaklistoffset */
+    0,                    /* tp_iter */
+    0,                    /* tp_iternext */
+    0,                    /* tp_methods */
+    encoder_members,      /* tp_members */
+    0,                    /* tp_getset */
+    0,                    /* tp_base */
+    0,                    /* tp_dict */
+    0,                    /* tp_descr_get */
+    0,                    /* tp_descr_set */
+    0,                    /* tp_dictoffset */
+    encoder_init,         /* tp_init */
+    0,                    /* tp_alloc */
+    encoder_new,          /* tp_new */
+    0,                    /* tp_free */
+};
+
+static PyMethodDef speedups_methods[] = {
+    {"encode_basestring_ascii",
+        (PyCFunction)py_encode_basestring_ascii,
+        METH_O,
+        pydoc_encode_basestring_ascii},
+    {"scanstring",
+        (PyCFunction)py_scanstring,
+        METH_VARARGS,
+        pydoc_scanstring},
+    {NULL, NULL, 0, NULL}
+};
+
+PyDoc_STRVAR(module_doc,
+"simplejson speedups\n");
+
+void
+init_speedups(void)
+{
+    PyObject *m, *decimal;
+    PyScannerType.tp_new = PyType_GenericNew;
+    if (PyType_Ready(&PyScannerType) < 0)
+        return;
+    PyEncoderType.tp_new = PyType_GenericNew;
+    if (PyType_Ready(&PyEncoderType) < 0)
+        return;
+
+    decimal = PyImport_ImportModule("decimal");
+    if (decimal == NULL)
+        return;
+    DecimalTypePtr = (PyTypeObject*)PyObject_GetAttrString(decimal, "Decimal");
+    Py_DECREF(decimal);
+    if (DecimalTypePtr == NULL)
+        return;
+
+    m = Py_InitModule3("_speedups", speedups_methods, module_doc);
+    Py_INCREF((PyObject*)&PyScannerType);
+    PyModule_AddObject(m, "make_scanner", (PyObject*)&PyScannerType);
+    Py_INCREF((PyObject*)&PyEncoderType);
+    PyModule_AddObject(m, "make_encoder", (PyObject*)&PyEncoderType);
+}
diff --git a/tablib/packages/simplejson/decoder.py b/tablib/packages/simplejson/decoder.py
new file mode 100644
index 0000000..4cf4015
--- /dev/null
+++ b/tablib/packages/simplejson/decoder.py
@@ -0,0 +1,421 @@
+"""Implementation of JSONDecoder
+"""
+import re
+import sys
+import struct
+
+from simplejson.scanner import make_scanner
+def _import_c_scanstring():
+    try:
+        from simplejson._speedups import scanstring
+        return scanstring
+    except ImportError:
+        return None
+c_scanstring = _import_c_scanstring()
+
+__all__ = ['JSONDecoder']
+
+FLAGS = re.VERBOSE | re.MULTILINE | re.DOTALL
+
+def _floatconstants():
+    _BYTES = '7FF80000000000007FF0000000000000'.decode('hex')
+    # The struct module in Python 2.4 would get frexp() out of range here
+    # when an endian is specified in the format string. Fixed in Python 2.5+
+    if sys.byteorder != 'big':
+        _BYTES = _BYTES[:8][::-1] + _BYTES[8:][::-1]
+    nan, inf = struct.unpack('dd', _BYTES)
+    return nan, inf, -inf
+
+NaN, PosInf, NegInf = _floatconstants()
+
+
+class JSONDecodeError(ValueError):
+    """Subclass of ValueError with the following additional properties:
+    
+    msg: The unformatted error message
+    doc: The JSON document being parsed
+    pos: The start index of doc where parsing failed
+    end: The end index of doc where parsing failed (may be None)
+    lineno: The line corresponding to pos
+    colno: The column corresponding to pos
+    endlineno: The line corresponding to end (may be None)
+    endcolno: The column corresponding to end (may be None)
+    
+    """
+    def __init__(self, msg, doc, pos, end=None):
+        ValueError.__init__(self, errmsg(msg, doc, pos, end=end))
+        self.msg = msg
+        self.doc = doc
+        self.pos = pos
+        self.end = end
+        self.lineno, self.colno = linecol(doc, pos)
+        if end is not None:
+            self.endlineno, self.endcolno = linecol(doc, pos)
+        else:
+            self.endlineno, self.endcolno = None, None
+
+
+def linecol(doc, pos):
+    lineno = doc.count('\n', 0, pos) + 1
+    if lineno == 1:
+        colno = pos
+    else:
+        colno = pos - doc.rindex('\n', 0, pos)
+    return lineno, colno
+
+
+def errmsg(msg, doc, pos, end=None):
+    # Note that this function is called from _speedups
+    lineno, colno = linecol(doc, pos)
+    if end is None:
+        #fmt = '{0}: line {1} column {2} (char {3})'
+        #return fmt.format(msg, lineno, colno, pos)
+        fmt = '%s: line %d column %d (char %d)'
+        return fmt % (msg, lineno, colno, pos)
+    endlineno, endcolno = linecol(doc, end)
+    #fmt = '{0}: line {1} column {2} - line {3} column {4} (char {5} - {6})'
+    #return fmt.format(msg, lineno, colno, endlineno, endcolno, pos, end)
+    fmt = '%s: line %d column %d - line %d column %d (char %d - %d)'
+    return fmt % (msg, lineno, colno, endlineno, endcolno, pos, end)
+
+
+_CONSTANTS = {
+    '-Infinity': NegInf,
+    'Infinity': PosInf,
+    'NaN': NaN,
+}
+
+STRINGCHUNK = re.compile(r'(.*?)(["\\\x00-\x1f])', FLAGS)
+BACKSLASH = {
+    '"': u'"', '\\': u'\\', '/': u'/',
+    'b': u'\b', 'f': u'\f', 'n': u'\n', 'r': u'\r', 't': u'\t',
+}
+
+DEFAULT_ENCODING = "utf-8"
+
+def py_scanstring(s, end, encoding=None, strict=True,
+        _b=BACKSLASH, _m=STRINGCHUNK.match):
+    """Scan the string s for a JSON string. End is the index of the
+    character in s after the quote that started the JSON string.
+    Unescapes all valid JSON string escape sequences and raises ValueError
+    on attempt to decode an invalid string. If strict is False then literal
+    control characters are allowed in the string.
+
+    Returns a tuple of the decoded string and the index of the character in s
+    after the end quote."""
+    if encoding is None:
+        encoding = DEFAULT_ENCODING
+    chunks = []
+    _append = chunks.append
+    begin = end - 1
+    while 1:
+        chunk = _m(s, end)
+        if chunk is None:
+            raise JSONDecodeError(
+                "Unterminated string starting at", s, begin)
+        end = chunk.end()
+        content, terminator = chunk.groups()
+        # Content is contains zero or more unescaped string characters
+        if content:
+            if not isinstance(content, unicode):
+                content = unicode(content, encoding)
+            _append(content)
+        # Terminator is the end of string, a literal control character,
+        # or a backslash denoting that an escape sequence follows
+        if terminator == '"':
+            break
+        elif terminator != '\\':
+            if strict:
+                msg = "Invalid control character %r at" % (terminator,)
+                #msg = "Invalid control character {0!r} at".format(terminator)
+                raise JSONDecodeError(msg, s, end)
+            else:
+                _append(terminator)
+                continue
+        try:
+            esc = s[end]
+        except IndexError:
+            raise JSONDecodeError(
+                "Unterminated string starting at", s, begin)
+        # If not a unicode escape sequence, must be in the lookup table
+        if esc != 'u':
+            try:
+                char = _b[esc]
+            except KeyError:
+                msg = "Invalid \\escape: " + repr(esc)
+                raise JSONDecodeError(msg, s, end)
+            end += 1
+        else:
+            # Unicode escape sequence
+            esc = s[end + 1:end + 5]
+            next_end = end + 5
+            if len(esc) != 4:
+                msg = "Invalid \\uXXXX escape"
+                raise JSONDecodeError(msg, s, end)
+            uni = int(esc, 16)
+            # Check for surrogate pair on UCS-4 systems
+            if 0xd800 <= uni <= 0xdbff and sys.maxunicode > 65535:
+                msg = "Invalid \\uXXXX\\uXXXX surrogate pair"
+                if not s[end + 5:end + 7] == '\\u':
+                    raise JSONDecodeError(msg, s, end)
+                esc2 = s[end + 7:end + 11]
+                if len(esc2) != 4:
+                    raise JSONDecodeError(msg, s, end)
+                uni2 = int(esc2, 16)
+                uni = 0x10000 + (((uni - 0xd800) << 10) | (uni2 - 0xdc00))
+                next_end += 6
+            char = unichr(uni)
+            end = next_end
+        # Append the unescaped character
+        _append(char)
+    return u''.join(chunks), end
+
+
+# Use speedup if available
+scanstring = c_scanstring or py_scanstring
+
+WHITESPACE = re.compile(r'[ \t\n\r]*', FLAGS)
+WHITESPACE_STR = ' \t\n\r'
+
+def JSONObject((s, end), encoding, strict, scan_once, object_hook,
+        object_pairs_hook, memo=None,
+        _w=WHITESPACE.match, _ws=WHITESPACE_STR):
+    # Backwards compatibility
+    if memo is None:
+        memo = {}
+    memo_get = memo.setdefault
+    pairs = []
+    # Use a slice to prevent IndexError from being raised, the following
+    # check will raise a more specific ValueError if the string is empty
+    nextchar = s[end:end + 1]
+    # Normally we expect nextchar == '"'
+    if nextchar != '"':
+        if nextchar in _ws:
+            end = _w(s, end).end()
+            nextchar = s[end:end + 1]
+        # Trivial empty object
+        if nextchar == '}':
+            if object_pairs_hook is not None:
+                result = object_pairs_hook(pairs)
+                return result, end
+            pairs = {}
+            if object_hook is not None:
+                pairs = object_hook(pairs)
+            return pairs, end + 1
+        elif nextchar != '"':
+            raise JSONDecodeError("Expecting property name", s, end)
+    end += 1
+    while True:
+        key, end = scanstring(s, end, encoding, strict)
+        key = memo_get(key, key)
+
+        # To skip some function call overhead we optimize the fast paths where
+        # the JSON key separator is ": " or just ":".
+        if s[end:end + 1] != ':':
+            end = _w(s, end).end()
+            if s[end:end + 1] != ':':
+                raise JSONDecodeError("Expecting : delimiter", s, end)
+
+        end += 1
+
+        try:
+            if s[end] in _ws:
+                end += 1
+                if s[end] in _ws:
+                    end = _w(s, end + 1).end()
+        except IndexError:
+            pass
+
+        try:
+            value, end = scan_once(s, end)
+        except StopIteration:
+            raise JSONDecodeError("Expecting object", s, end)
+        pairs.append((key, value))
+
+        try:
+            nextchar = s[end]
+            if nextchar in _ws:
+                end = _w(s, end + 1).end()
+                nextchar = s[end]
+        except IndexError:
+            nextchar = ''
+        end += 1
+
+        if nextchar == '}':
+            break
+        elif nextchar != ',':
+            raise JSONDecodeError("Expecting , delimiter", s, end - 1)
+
+        try:
+            nextchar = s[end]
+            if nextchar in _ws:
+                end += 1
+                nextchar = s[end]
+                if nextchar in _ws:
+                    end = _w(s, end + 1).end()
+                    nextchar = s[end]
+        except IndexError:
+            nextchar = ''
+
+        end += 1
+        if nextchar != '"':
+            raise JSONDecodeError("Expecting property name", s, end - 1)
+
+    if object_pairs_hook is not None:
+        result = object_pairs_hook(pairs)
+        return result, end
+    pairs = dict(pairs)
+    if object_hook is not None:
+        pairs = object_hook(pairs)
+    return pairs, end
+
+def JSONArray((s, end), scan_once, _w=WHITESPACE.match, _ws=WHITESPACE_STR):
+    values = []
+    nextchar = s[end:end + 1]
+    if nextchar in _ws:
+        end = _w(s, end + 1).end()
+        nextchar = s[end:end + 1]
+    # Look-ahead for trivial empty array
+    if nextchar == ']':
+        return values, end + 1
+    _append = values.append
+    while True:
+        try:
+            value, end = scan_once(s, end)
+        except StopIteration:
+            raise JSONDecodeError("Expecting object", s, end)
+        _append(value)
+        nextchar = s[end:end + 1]
+        if nextchar in _ws:
+            end = _w(s, end + 1).end()
+            nextchar = s[end:end + 1]
+        end += 1
+        if nextchar == ']':
+            break
+        elif nextchar != ',':
+            raise JSONDecodeError("Expecting , delimiter", s, end)
+
+        try:
+            if s[end] in _ws:
+                end += 1
+                if s[end] in _ws:
+                    end = _w(s, end + 1).end()
+        except IndexError:
+            pass
+
+    return values, end
+
+class JSONDecoder(object):
+    """Simple JSON <http://json.org> decoder
+
+    Performs the following translations in decoding by default:
+
+    +---------------+-------------------+
+    | JSON          | Python            |
+    +===============+===================+
+    | object        | dict              |
+    +---------------+-------------------+
+    | array         | list              |
+    +---------------+-------------------+
+    | string        | unicode           |
+    +---------------+-------------------+
+    | number (int)  | int, long         |
+    +---------------+-------------------+
+    | number (real) | float             |
+    +---------------+-------------------+
+    | true          | True              |
+    +---------------+-------------------+
+    | false         | False             |
+    +---------------+-------------------+
+    | null          | None              |
+    +---------------+-------------------+
+
+    It also understands ``NaN``, ``Infinity``, and ``-Infinity`` as
+    their corresponding ``float`` values, which is outside the JSON spec.
+
+    """
+
+    def __init__(self, encoding=None, object_hook=None, parse_float=None,
+            parse_int=None, parse_constant=None, strict=True,
+            object_pairs_hook=None):
+        """
+        *encoding* determines the encoding used to interpret any
+        :class:`str` objects decoded by this instance (``'utf-8'`` by
+        default).  It has no effect when decoding :class:`unicode` objects.
+
+        Note that currently only encodings that are a superset of ASCII work,
+        strings of other encodings should be passed in as :class:`unicode`.
+
+        *object_hook*, if specified, will be called with the result of every
+        JSON object decoded and its return value will be used in place of the
+        given :class:`dict`.  This can be used to provide custom
+        deserializations (e.g. to support JSON-RPC class hinting).
+
+        *object_pairs_hook* is an optional function that will be called with
+        the result of any object literal decode with an ordered list of pairs.
+        The return value of *object_pairs_hook* will be used instead of the
+        :class:`dict`.  This feature can be used to implement custom decoders
+        that rely on the order that the key and value pairs are decoded (for
+        example, :func:`collections.OrderedDict` will remember the order of
+        insertion). If *object_hook* is also defined, the *object_pairs_hook*
+        takes priority.
+
+        *parse_float*, if specified, will be called with the string of every
+        JSON float to be decoded.  By default, this is equivalent to
+        ``float(num_str)``. This can be used to use another datatype or parser
+        for JSON floats (e.g. :class:`decimal.Decimal`).
+
+        *parse_int*, if specified, will be called with the string of every
+        JSON int to be decoded.  By default, this is equivalent to
+        ``int(num_str)``.  This can be used to use another datatype or parser
+        for JSON integers (e.g. :class:`float`).
+
+        *parse_constant*, if specified, will be called with one of the
+        following strings: ``'-Infinity'``, ``'Infinity'``, ``'NaN'``.  This
+        can be used to raise an exception if invalid JSON numbers are
+        encountered.
+
+        *strict* controls the parser's behavior when it encounters an
+        invalid control character in a string. The default setting of
+        ``True`` means that unescaped control characters are parse errors, if
+        ``False`` then control characters will be allowed in strings.
+
+        """
+        self.encoding = encoding
+        self.object_hook = object_hook
+        self.object_pairs_hook = object_pairs_hook
+        self.parse_float = parse_float or float
+        self.parse_int = parse_int or int
+        self.parse_constant = parse_constant or _CONSTANTS.__getitem__
+        self.strict = strict
+        self.parse_object = JSONObject
+        self.parse_array = JSONArray
+        self.parse_string = scanstring
+        self.memo = {}
+        self.scan_once = make_scanner(self)
+
+    def decode(self, s, _w=WHITESPACE.match):
+        """Return the Python representation of ``s`` (a ``str`` or ``unicode``
+        instance containing a JSON document)
+
+        """
+        obj, end = self.raw_decode(s, idx=_w(s, 0).end())
+        end = _w(s, end).end()
+        if end != len(s):
+            raise JSONDecodeError("Extra data", s, end, len(s))
+        return obj
+
+    def raw_decode(self, s, idx=0):
+        """Decode a JSON document from ``s`` (a ``str`` or ``unicode``
+        beginning with a JSON document) and return a 2-tuple of the Python
+        representation and the index in ``s`` where the document ended.
+
+        This can be used to decode a JSON document from a string that may
+        have extraneous data at the end.
+
+        """
+        try:
+            obj, end = self.scan_once(s, idx)
+        except StopIteration:
+            raise JSONDecodeError("No JSON object could be decoded", s, idx)
+        return obj, end
diff --git a/tablib/packages/simplejson/encoder.py b/tablib/packages/simplejson/encoder.py
new file mode 100644
index 0000000..cab8456
--- /dev/null
+++ b/tablib/packages/simplejson/encoder.py
@@ -0,0 +1,501 @@
+"""Implementation of JSONEncoder
+"""
+import re
+from decimal import Decimal
+
+def _import_speedups():
+    try:
+        from simplejson import _speedups
+        return _speedups.encode_basestring_ascii, _speedups.make_encoder
+    except ImportError:
+        return None, None
+c_encode_basestring_ascii, c_make_encoder = _import_speedups()
+
+from simplejson.decoder import PosInf
+
+ESCAPE = re.compile(r'[\x00-\x1f\\"\b\f\n\r\t]')
+ESCAPE_ASCII = re.compile(r'([\\"]|[^\ -~])')
+HAS_UTF8 = re.compile(r'[\x80-\xff]')
+ESCAPE_DCT = {
+    '\\': '\\\\',
+    '"': '\\"',
+    '\b': '\\b',
+    '\f': '\\f',
+    '\n': '\\n',
+    '\r': '\\r',
+    '\t': '\\t',
+}
+for i in range(0x20):
+    #ESCAPE_DCT.setdefault(chr(i), '\\u{0:04x}'.format(i))
+    ESCAPE_DCT.setdefault(chr(i), '\\u%04x' % (i,))
+
+FLOAT_REPR = repr
+
+def encode_basestring(s):
+    """Return a JSON representation of a Python string
+
+    """
+    if isinstance(s, str) and HAS_UTF8.search(s) is not None:
+        s = s.decode('utf-8')
+    def replace(match):
+        return ESCAPE_DCT[match.group(0)]
+    return u'"' + ESCAPE.sub(replace, s) + u'"'
+
+
+def py_encode_basestring_ascii(s):
+    """Return an ASCII-only JSON representation of a Python string
+
+    """
+    if isinstance(s, str) and HAS_UTF8.search(s) is not None:
+        s = s.decode('utf-8')
+    def replace(match):
+        s = match.group(0)
+        try:
+            return ESCAPE_DCT[s]
+        except KeyError:
+            n = ord(s)
+            if n < 0x10000:
+                #return '\\u{0:04x}'.format(n)
+                return '\\u%04x' % (n,)
+            else:
+                # surrogate pair
+                n -= 0x10000
+                s1 = 0xd800 | ((n >> 10) & 0x3ff)
+                s2 = 0xdc00 | (n & 0x3ff)
+                #return '\\u{0:04x}\\u{1:04x}'.format(s1, s2)
+                return '\\u%04x\\u%04x' % (s1, s2)
+    return '"' + str(ESCAPE_ASCII.sub(replace, s)) + '"'
+
+
+encode_basestring_ascii = (
+    c_encode_basestring_ascii or py_encode_basestring_ascii)
+
+class JSONEncoder(object):
+    """Extensible JSON <http://json.org> encoder for Python data structures.
+
+    Supports the following objects and types by default:
+
+    +-------------------+---------------+
+    | Python            | JSON          |
+    +===================+===============+
+    | dict              | object        |
+    +-------------------+---------------+
+    | list, tuple       | array         |
+    +-------------------+---------------+
+    | str, unicode      | string        |
+    +-------------------+---------------+
+    | int, long, float  | number        |
+    +-------------------+---------------+
+    | True              | true          |
+    +-------------------+---------------+
+    | False             | false         |
+    +-------------------+---------------+
+    | None              | null          |
+    +-------------------+---------------+
+
+    To extend this to recognize other objects, subclass and implement a
+    ``.default()`` method with another method that returns a serializable
+    object for ``o`` if possible, otherwise it should call the superclass
+    implementation (to raise ``TypeError``).
+
+    """
+    item_separator = ', '
+    key_separator = ': '
+    def __init__(self, skipkeys=False, ensure_ascii=True,
+            check_circular=True, allow_nan=True, sort_keys=False,
+            indent=None, separators=None, encoding='utf-8', default=None,
+            use_decimal=False):
+        """Constructor for JSONEncoder, with sensible defaults.
+
+        If skipkeys is false, then it is a TypeError to attempt
+        encoding of keys that are not str, int, long, float or None.  If
+        skipkeys is True, such items are simply skipped.
+
+        If ensure_ascii is true, the output is guaranteed to be str
+        objects with all incoming unicode characters escaped.  If
+        ensure_ascii is false, the output will be unicode object.
+
+        If check_circular is true, then lists, dicts, and custom encoded
+        objects will be checked for circular references during encoding to
+        prevent an infinite recursion (which would cause an OverflowError).
+        Otherwise, no such check takes place.
+
+        If allow_nan is true, then NaN, Infinity, and -Infinity will be
+        encoded as such.  This behavior is not JSON specification compliant,
+        but is consistent with most JavaScript based encoders and decoders.
+        Otherwise, it will be a ValueError to encode such floats.
+
+        If sort_keys is true, then the output of dictionaries will be
+        sorted by key; this is useful for regression tests to ensure
+        that JSON serializations can be compared on a day-to-day basis.
+
+        If indent is a string, then JSON array elements and object members
+        will be pretty-printed with a newline followed by that string repeated
+        for each level of nesting. ``None`` (the default) selects the most compact
+        representation without any newlines. For backwards compatibility with
+        versions of simplejson earlier than 2.1.0, an integer is also accepted
+        and is converted to a string with that many spaces.
+
+        If specified, separators should be a (item_separator, key_separator)
+        tuple.  The default is (', ', ': ').  To get the most compact JSON
+        representation you should specify (',', ':') to eliminate whitespace.
+
+        If specified, default is a function that gets called for objects
+        that can't otherwise be serialized.  It should return a JSON encodable
+        version of the object or raise a ``TypeError``.
+
+        If encoding is not None, then all input strings will be
+        transformed into unicode using that encoding prior to JSON-encoding.
+        The default is UTF-8.
+        
+        If use_decimal is true (not the default), ``decimal.Decimal`` will
+        be supported directly by the encoder. For the inverse, decode JSON
+        with ``parse_float=decimal.Decimal``.
+
+        """
+
+        self.skipkeys = skipkeys
+        self.ensure_ascii = ensure_ascii
+        self.check_circular = check_circular
+        self.allow_nan = allow_nan
+        self.sort_keys = sort_keys
+        self.use_decimal = use_decimal
+        if isinstance(indent, (int, long)):
+            indent = ' ' * indent
+        self.indent = indent
+        if separators is not None:
+            self.item_separator, self.key_separator = separators
+        if default is not None:
+            self.default = default
+        self.encoding = encoding
+
+    def default(self, o):
+        """Implement this method in a subclass such that it returns
+        a serializable object for ``o``, or calls the base implementation
+        (to raise a ``TypeError``).
+
+        For example, to support arbitrary iterators, you could
+        implement default like this::
+
+            def default(self, o):
+                try:
+                    iterable = iter(o)
+                except TypeError:
+                    pass
+                else:
+                    return list(iterable)
+                return JSONEncoder.default(self, o)
+
+        """
+        raise TypeError(repr(o) + " is not JSON serializable")
+
+    def encode(self, o):
+        """Return a JSON string representation of a Python data structure.
+
+        >>> from simplejson import JSONEncoder
+        >>> JSONEncoder().encode({"foo": ["bar", "baz"]})
+        '{"foo": ["bar", "baz"]}'
+
+        """
+        # This is for extremely simple cases and benchmarks.
+        if isinstance(o, basestring):
+            if isinstance(o, str):
+                _encoding = self.encoding
+                if (_encoding is not None
+                        and not (_encoding == 'utf-8')):
+                    o = o.decode(_encoding)
+            if self.ensure_ascii:
+                return encode_basestring_ascii(o)
+            else:
+                return encode_basestring(o)
+        # This doesn't pass the iterator directly to ''.join() because the
+        # exceptions aren't as detailed.  The list call should be roughly
+        # equivalent to the PySequence_Fast that ''.join() would do.
+        chunks = self.iterencode(o, _one_shot=True)
+        if not isinstance(chunks, (list, tuple)):
+            chunks = list(chunks)
+        if self.ensure_ascii:
+            return ''.join(chunks)
+        else:
+            return u''.join(chunks)
+
+    def iterencode(self, o, _one_shot=False):
+        """Encode the given object and yield each string
+        representation as available.
+
+        For example::
+
+            for chunk in JSONEncoder().iterencode(bigobject):
+                mysocket.write(chunk)
+
+        """
+        if self.check_circular:
+            markers = {}
+        else:
+            markers = None
+        if self.ensure_ascii:
+            _encoder = encode_basestring_ascii
+        else:
+            _encoder = encode_basestring
+        if self.encoding != 'utf-8':
+            def _encoder(o, _orig_encoder=_encoder, _encoding=self.encoding):
+                if isinstance(o, str):
+                    o = o.decode(_encoding)
+                return _orig_encoder(o)
+
+        def floatstr(o, allow_nan=self.allow_nan,
+                _repr=FLOAT_REPR, _inf=PosInf, _neginf=-PosInf):
+            # Check for specials. Note that this type of test is processor
+            # and/or platform-specific, so do tests which don't depend on
+            # the internals.
+
+            if o != o:
+                text = 'NaN'
+            elif o == _inf:
+                text = 'Infinity'
+            elif o == _neginf:
+                text = '-Infinity'
+            else:
+                return _repr(o)
+
+            if not allow_nan:
+                raise ValueError(
+                    "Out of range float values are not JSON compliant: " +
+                    repr(o))
+
+            return text
+
+
+        key_memo = {}
+        if (_one_shot and c_make_encoder is not None
+                and not self.indent and not self.sort_keys):
+            _iterencode = c_make_encoder(
+                markers, self.default, _encoder, self.indent,
+                self.key_separator, self.item_separator, self.sort_keys,
+                self.skipkeys, self.allow_nan, key_memo, self.use_decimal)
+        else:
+            _iterencode = _make_iterencode(
+                markers, self.default, _encoder, self.indent, floatstr,
+                self.key_separator, self.item_separator, self.sort_keys,
+                self.skipkeys, _one_shot, self.use_decimal)
+        try:
+            return _iterencode(o, 0)
+        finally:
+            key_memo.clear()
+
+
+class JSONEncoderForHTML(JSONEncoder):
+    """An encoder that produces JSON safe to embed in HTML.
+
+    To embed JSON content in, say, a script tag on a web page, the
+    characters &, < and > should be escaped. They cannot be escaped
+    with the usual entities (e.g. &amp;) because they are not expanded
+    within <script> tags.
+    """
+
+    def encode(self, o):
+        # Override JSONEncoder.encode because it has hacks for
+        # performance that make things more complicated.
+        chunks = self.iterencode(o, True)
+        if self.ensure_ascii:
+            return ''.join(chunks)
+        else:
+            return u''.join(chunks)
+
+    def iterencode(self, o, _one_shot=False):
+        chunks = super(JSONEncoderForHTML, self).iterencode(o, _one_shot)
+        for chunk in chunks:
+            chunk = chunk.replace('&', '\\u0026')
+            chunk = chunk.replace('<', '\\u003c')
+            chunk = chunk.replace('>', '\\u003e')
+            yield chunk
+
+
+def _make_iterencode(markers, _default, _encoder, _indent, _floatstr,
+        _key_separator, _item_separator, _sort_keys, _skipkeys, _one_shot,
+        _use_decimal,
+        ## HACK: hand-optimized bytecode; turn globals into locals
+        False=False,
+        True=True,
+        ValueError=ValueError,
+        basestring=basestring,
+        Decimal=Decimal,
+        dict=dict,
+        float=float,
+        id=id,
+        int=int,
+        isinstance=isinstance,
+        list=list,
+        long=long,
+        str=str,
+        tuple=tuple,
+    ):
+
+    def _iterencode_list(lst, _current_indent_level):
+        if not lst:
+            yield '[]'
+            return
+        if markers is not None:
+            markerid = id(lst)
+            if markerid in markers:
+                raise ValueError("Circular reference detected")
+            markers[markerid] = lst
+        buf = '['
+        if _indent is not None:
+            _current_indent_level += 1
+            newline_indent = '\n' + (_indent * _current_indent_level)
+            separator = _item_separator + newline_indent
+            buf += newline_indent
+        else:
+            newline_indent = None
+            separator = _item_separator
+        first = True
+        for value in lst:
+            if first:
+                first = False
+            else:
+                buf = separator
+            if isinstance(value, basestring):
+                yield buf + _encoder(value)
+            elif value is None:
+                yield buf + 'null'
+            elif value is True:
+                yield buf + 'true'
+            elif value is False:
+                yield buf + 'false'
+            elif isinstance(value, (int, long)):
+                yield buf + str(value)
+            elif isinstance(value, float):
+                yield buf + _floatstr(value)
+            elif _use_decimal and isinstance(value, Decimal):
+                yield buf + str(value)
+            else:
+                yield buf
+                if isinstance(value, (list, tuple)):
+                    chunks = _iterencode_list(value, _current_indent_level)
+                elif isinstance(value, dict):
+                    chunks = _iterencode_dict(value, _current_indent_level)
+                else:
+                    chunks = _iterencode(value, _current_indent_level)
+                for chunk in chunks:
+                    yield chunk
+        if newline_indent is not None:
+            _current_indent_level -= 1
+            yield '\n' + (_indent * _current_indent_level)
+        yield ']'
+        if markers is not None:
+            del markers[markerid]
+
+    def _iterencode_dict(dct, _current_indent_level):
+        if not dct:
+            yield '{}'
+            return
+        if markers is not None:
+            markerid = id(dct)
+            if markerid in markers:
+                raise ValueError("Circular reference detected")
+            markers[markerid] = dct
+        yield '{'
+        if _indent is not None:
+            _current_indent_level += 1
+            newline_indent = '\n' + (_indent * _current_indent_level)
+            item_separator = _item_separator + newline_indent
+            yield newline_indent
+        else:
+            newline_indent = None
+            item_separator = _item_separator
+        first = True
+        if _sort_keys:
+            items = dct.items()
+            items.sort(key=lambda kv: kv[0])
+        else:
+            items = dct.iteritems()
+        for key, value in items:
+            if isinstance(key, basestring):
+                pass
+            # JavaScript is weakly typed for these, so it makes sense to
+            # also allow them.  Many encoders seem to do something like this.
+            elif isinstance(key, float):
+                key = _floatstr(key)
+            elif key is True:
+                key = 'true'
+            elif key is False:
+                key = 'false'
+            elif key is None:
+                key = 'null'
+            elif isinstance(key, (int, long)):
+                key = str(key)
+            elif _skipkeys:
+                continue
+            else:
+                raise TypeError("key " + repr(key) + " is not a string")
+            if first:
+                first = False
+            else:
+                yield item_separator
+            yield _encoder(key)
+            yield _key_separator
+            if isinstance(value, basestring):
+                yield _encoder(value)
+            elif value is None:
+                yield 'null'
+            elif value is True:
+                yield 'true'
+            elif value is False:
+                yield 'false'
+            elif isinstance(value, (int, long)):
+                yield str(value)
+            elif isinstance(value, float):
+                yield _floatstr(value)
+            elif _use_decimal and isinstance(value, Decimal):
+                yield str(value)
+            else:
+                if isinstance(value, (list, tuple)):
+                    chunks = _iterencode_list(value, _current_indent_level)
+                elif isinstance(value, dict):
+                    chunks = _iterencode_dict(value, _current_indent_level)
+                else:
+                    chunks = _iterencode(value, _current_indent_level)
+                for chunk in chunks:
+                    yield chunk
+        if newline_indent is not None:
+            _current_indent_level -= 1
+            yield '\n' + (_indent * _current_indent_level)
+        yield '}'
+        if markers is not None:
+            del markers[markerid]
+
+    def _iterencode(o, _current_indent_level):
+        if isinstance(o, basestring):
+            yield _encoder(o)
+        elif o is None:
+            yield 'null'
+        elif o is True:
+            yield 'true'
+        elif o is False:
+            yield 'false'
+        elif isinstance(o, (int, long)):
+            yield str(o)
+        elif isinstance(o, float):
+            yield _floatstr(o)
+        elif isinstance(o, (list, tuple)):
+            for chunk in _iterencode_list(o, _current_indent_level):
+                yield chunk
+        elif isinstance(o, dict):
+            for chunk in _iterencode_dict(o, _current_indent_level):
+                yield chunk
+        elif _use_decimal and isinstance(o, Decimal):
+            yield str(o)
+        else:
+            if markers is not None:
+                markerid = id(o)
+                if markerid in markers:
+                    raise ValueError("Circular reference detected")
+                markers[markerid] = o
+            o = _default(o)
+            for chunk in _iterencode(o, _current_indent_level):
+                yield chunk
+            if markers is not None:
+                del markers[markerid]
+
+    return _iterencode
diff --git a/tablib/packages/simplejson/ordered_dict.py b/tablib/packages/simplejson/ordered_dict.py
new file mode 100644
index 0000000..87ad888
--- /dev/null
+++ b/tablib/packages/simplejson/ordered_dict.py
@@ -0,0 +1,119 @@
+"""Drop-in replacement for collections.OrderedDict by Raymond Hettinger
+
+http://code.activestate.com/recipes/576693/
+
+"""
+from UserDict import DictMixin
+
+# Modified from original to support Python 2.4, see
+# http://code.google.com/p/simplejson/issues/detail?id=53
+try:
+    all
+except NameError:
+    def all(seq):
+        for elem in seq:
+            if not elem:
+                return False
+        return True
+
+class OrderedDict(dict, DictMixin):
+
+    def __init__(self, *args, **kwds):
+        if len(args) > 1:
+            raise TypeError('expected at most 1 arguments, got %d' % len(args))
+        try:
+            self.__end
+        except AttributeError:
+            self.clear()
+        self.update(*args, **kwds)
+
+    def clear(self):
+        self.__end = end = []
+        end += [None, end, end]         # sentinel node for doubly linked list
+        self.__map = {}                 # key --> [key, prev, next]
+        dict.clear(self)
+
+    def __setitem__(self, key, value):
+        if key not in self:
+            end = self.__end
+            curr = end[1]
+            curr[2] = end[1] = self.__map[key] = [key, curr, end]
+        dict.__setitem__(self, key, value)
+
+    def __delitem__(self, key):
+        dict.__delitem__(self, key)
+        key, prev, next = self.__map.pop(key)
+        prev[2] = next
+        next[1] = prev
+
+    def __iter__(self):
+        end = self.__end
+        curr = end[2]
+        while curr is not end:
+            yield curr[0]
+            curr = curr[2]
+
+    def __reversed__(self):
+        end = self.__end
+        curr = end[1]
+        while curr is not end:
+            yield curr[0]
+            curr = curr[1]
+
+    def popitem(self, last=True):
+        if not self:
+            raise KeyError('dictionary is empty')
+        # Modified from original to support Python 2.4, see
+        # http://code.google.com/p/simplejson/issues/detail?id=53
+        if last:
+            key = reversed(self).next()
+        else:
+            key = iter(self).next()
+        value = self.pop(key)
+        return key, value
+
+    def __reduce__(self):
+        items = [[k, self[k]] for k in self]
+        tmp = self.__map, self.__end
+        del self.__map, self.__end
+        inst_dict = vars(self).copy()
+        self.__map, self.__end = tmp
+        if inst_dict:
+            return (self.__class__, (items,), inst_dict)
+        return self.__class__, (items,)
+
+    def keys(self):
+        return list(self)
+
+    setdefault = DictMixin.setdefault
+    update = DictMixin.update
+    pop = DictMixin.pop
+    values = DictMixin.values
+    items = DictMixin.items
+    iterkeys = DictMixin.iterkeys
+    itervalues = DictMixin.itervalues
+    iteritems = DictMixin.iteritems
+
+    def __repr__(self):
+        if not self:
+            return '%s()' % (self.__class__.__name__,)
+        return '%s(%r)' % (self.__class__.__name__, self.items())
+
+    def copy(self):
+        return self.__class__(self)
+
+    @classmethod
+    def fromkeys(cls, iterable, value=None):
+        d = cls()
+        for key in iterable:
+            d[key] = value
+        return d
+
+    def __eq__(self, other):
+        if isinstance(other, OrderedDict):
+            return len(self)==len(other) and \
+                   all(p==q for p, q in  zip(self.items(), other.items()))
+        return dict.__eq__(self, other)
+
+    def __ne__(self, other):
+        return not self == other
diff --git a/tablib/packages/simplejson/scanner.py b/tablib/packages/simplejson/scanner.py
new file mode 100644
index 0000000..54593a3
--- /dev/null
+++ b/tablib/packages/simplejson/scanner.py
@@ -0,0 +1,77 @@
+"""JSON token scanner
+"""
+import re
+def _import_c_make_scanner():
+    try:
+        from simplejson._speedups import make_scanner
+        return make_scanner
+    except ImportError:
+        return None
+c_make_scanner = _import_c_make_scanner()
+
+__all__ = ['make_scanner']
+
+NUMBER_RE = re.compile(
+    r'(-?(?:0|[1-9]\d*))(\.\d+)?([eE][-+]?\d+)?',
+    (re.VERBOSE | re.MULTILINE | re.DOTALL))
+
+def py_make_scanner(context):
+    parse_object = context.parse_object
+    parse_array = context.parse_array
+    parse_string = context.parse_string
+    match_number = NUMBER_RE.match
+    encoding = context.encoding
+    strict = context.strict
+    parse_float = context.parse_float
+    parse_int = context.parse_int
+    parse_constant = context.parse_constant
+    object_hook = context.object_hook
+    object_pairs_hook = context.object_pairs_hook
+    memo = context.memo
+
+    def _scan_once(string, idx):
+        try:
+            nextchar = string[idx]
+        except IndexError:
+            raise StopIteration
+
+        if nextchar == '"':
+            return parse_string(string, idx + 1, encoding, strict)
+        elif nextchar == '{':
+            return parse_object((string, idx + 1), encoding, strict,
+                _scan_once, object_hook, object_pairs_hook, memo)
+        elif nextchar == '[':
+            return parse_array((string, idx + 1), _scan_once)
+        elif nextchar == 'n' and string[idx:idx + 4] == 'null':
+            return None, idx + 4
+        elif nextchar == 't' and string[idx:idx + 4] == 'true':
+            return True, idx + 4
+        elif nextchar == 'f' and string[idx:idx + 5] == 'false':
+            return False, idx + 5
+
+        m = match_number(string, idx)
+        if m is not None:
+            integer, frac, exp = m.groups()
+            if frac or exp:
+                res = parse_float(integer + (frac or '') + (exp or ''))
+            else:
+                res = parse_int(integer)
+            return res, m.end()
+        elif nextchar == 'N' and string[idx:idx + 3] == 'NaN':
+            return parse_constant('NaN'), idx + 3
+        elif nextchar == 'I' and string[idx:idx + 8] == 'Infinity':
+            return parse_constant('Infinity'), idx + 8
+        elif nextchar == '-' and string[idx:idx + 9] == '-Infinity':
+            return parse_constant('-Infinity'), idx + 9
+        else:
+            raise StopIteration
+
+    def scan_once(string, idx):
+        try:
+            return _scan_once(string, idx)
+        finally:
+            memo.clear()
+
+    return scan_once
+
+make_scanner = c_make_scanner or py_make_scanner
diff --git a/tablib/packages/simplejson/tests/__init__.py b/tablib/packages/simplejson/tests/__init__.py
new file mode 100644
index 0000000..22d8465
--- /dev/null
+++ b/tablib/packages/simplejson/tests/__init__.py
@@ -0,0 +1,63 @@
+import unittest
+import doctest
+
+
+class OptionalExtensionTestSuite(unittest.TestSuite):
+    def run(self, result):
+        import simplejson
+        run = unittest.TestSuite.run
+        run(self, result)
+        simplejson._toggle_speedups(False)
+        run(self, result)
+        simplejson._toggle_speedups(True)
+        return result
+
+
+def additional_tests(suite=None):
+    import simplejson
+    import simplejson.encoder
+    import simplejson.decoder
+    if suite is None:
+        suite = unittest.TestSuite()
+    for mod in (simplejson, simplejson.encoder, simplejson.decoder):
+        suite.addTest(doctest.DocTestSuite(mod))
+    suite.addTest(doctest.DocFileSuite('../../index.rst'))
+    return suite
+
+
+def all_tests_suite():
+    suite = unittest.TestLoader().loadTestsFromNames([
+        'simplejson.tests.test_check_circular',
+        'simplejson.tests.test_decode',
+        'simplejson.tests.test_default',
+        'simplejson.tests.test_dump',
+        'simplejson.tests.test_encode_basestring_ascii',
+        'simplejson.tests.test_encode_for_html',
+        'simplejson.tests.test_fail',
+        'simplejson.tests.test_float',
+        'simplejson.tests.test_indent',
+        'simplejson.tests.test_pass1',
+        'simplejson.tests.test_pass2',
+        'simplejson.tests.test_pass3',
+        'simplejson.tests.test_recursion',
+        'simplejson.tests.test_scanstring',
+        'simplejson.tests.test_separators',
+        'simplejson.tests.test_speedups',
+        'simplejson.tests.test_unicode',
+        'simplejson.tests.test_decimal',
+    ])
+    suite = additional_tests(suite)
+    return OptionalExtensionTestSuite([suite])
+
+
+def main():
+    runner = unittest.TextTestRunner()
+    suite = all_tests_suite()
+    runner.run(suite)
+
+
+if __name__ == '__main__':
+    import os
+    import sys
+    sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__file__)))))
+    main()
diff --git a/tablib/packages/simplejson/tests/test_check_circular.py b/tablib/packages/simplejson/tests/test_check_circular.py
new file mode 100644
index 0000000..af6463d
--- /dev/null
+++ b/tablib/packages/simplejson/tests/test_check_circular.py
@@ -0,0 +1,30 @@
+from unittest import TestCase
+import simplejson as json
+
+def default_iterable(obj):
+    return list(obj)
+
+class TestCheckCircular(TestCase):
+    def test_circular_dict(self):
+        dct = {}
+        dct['a'] = dct
+        self.assertRaises(ValueError, json.dumps, dct)
+
+    def test_circular_list(self):
+        lst = []
+        lst.append(lst)
+        self.assertRaises(ValueError, json.dumps, lst)
+
+    def test_circular_composite(self):
+        dct2 = {}
+        dct2['a'] = []
+        dct2['a'].append(dct2)
+        self.assertRaises(ValueError, json.dumps, dct2)
+
+    def test_circular_default(self):
+        json.dumps([set()], default=default_iterable)
+        self.assertRaises(TypeError, json.dumps, [set()])
+
+    def test_circular_off_default(self):
+        json.dumps([set()], default=default_iterable, check_circular=False)
+        self.assertRaises(TypeError, json.dumps, [set()], check_circular=False)
diff --git a/tablib/packages/simplejson/tests/test_decimal.py b/tablib/packages/simplejson/tests/test_decimal.py
new file mode 100644
index 0000000..a694c7e
--- /dev/null
+++ b/tablib/packages/simplejson/tests/test_decimal.py
@@ -0,0 +1,33 @@
+from decimal import Decimal
+from unittest import TestCase
+
+import simplejson as json
+
+class TestDecimal(TestCase):
+    NUMS = "1.0", "10.00", "1.1", "1234567890.1234567890", "500"
+    def test_decimal_encode(self):
+        for d in map(Decimal, self.NUMS):
+            self.assertEquals(json.dumps(d, use_decimal=True), str(d))
+    
+    def test_decimal_decode(self):
+        for s in self.NUMS:
+            self.assertEquals(json.loads(s, parse_float=Decimal), Decimal(s))
+    
+    def test_decimal_roundtrip(self):
+        for d in map(Decimal, self.NUMS):
+            # The type might not be the same (int and Decimal) but they
+            # should still compare equal.
+            self.assertEquals(
+                json.loads(
+                    json.dumps(d, use_decimal=True), parse_float=Decimal),
+                d)
+            self.assertEquals(
+                json.loads(
+                    json.dumps([d], use_decimal=True), parse_float=Decimal),
+                [d])
+
+    def test_decimal_defaults(self):
+        d = Decimal(1)
+        # use_decimal=False is the default
+        self.assertRaises(TypeError, json.dumps, d, use_decimal=False)
+        self.assertRaises(TypeError, json.dumps, d)
\ No newline at end of file
diff --git a/tablib/packages/simplejson/tests/test_decode.py b/tablib/packages/simplejson/tests/test_decode.py
new file mode 100644
index 0000000..a5a1c48
--- /dev/null
+++ b/tablib/packages/simplejson/tests/test_decode.py
@@ -0,0 +1,73 @@
+import decimal
+from unittest import TestCase
+from StringIO import StringIO
+
+import simplejson as json
+from simplejson import OrderedDict
+
+class TestDecode(TestCase):
+    if not hasattr(TestCase, 'assertIs'):
+        def assertIs(self, a, b):
+            self.assertTrue(a is b, '%r is %r' % (a, b))
+
+    def test_decimal(self):
+        rval = json.loads('1.1', parse_float=decimal.Decimal)
+        self.assertTrue(isinstance(rval, decimal.Decimal))
+        self.assertEquals(rval, decimal.Decimal('1.1'))
+
+    def test_float(self):
+        rval = json.loads('1', parse_int=float)
+        self.assertTrue(isinstance(rval, float))
+        self.assertEquals(rval, 1.0)
+
+    def test_decoder_optimizations(self):
+        # Several optimizations were made that skip over calls to
+        # the whitespace regex, so this test is designed to try and
+        # exercise the uncommon cases. The array cases are already covered.
+        rval = json.loads('{   "key"    :    "value"    ,  "k":"v"    }')
+        self.assertEquals(rval, {"key":"value", "k":"v"})
+
+    def test_empty_objects(self):
+        s = '{}'
+        self.assertEqual(json.loads(s), eval(s))
+        s = '[]'
+        self.assertEqual(json.loads(s), eval(s))
+        s = '""'
+        self.assertEqual(json.loads(s), eval(s))
+
+    def test_object_pairs_hook(self):
+        s = '{"xkd":1, "kcw":2, "art":3, "hxm":4, "qrt":5, "pad":6, "hoy":7}'
+        p = [("xkd", 1), ("kcw", 2), ("art", 3), ("hxm", 4),
+             ("qrt", 5), ("pad", 6), ("hoy", 7)]
+        self.assertEqual(json.loads(s), eval(s))
+        self.assertEqual(json.loads(s, object_pairs_hook=lambda x: x), p)
+        self.assertEqual(json.load(StringIO(s),
+                                   object_pairs_hook=lambda x: x), p)
+        od = json.loads(s, object_pairs_hook=OrderedDict)
+        self.assertEqual(od, OrderedDict(p))
+        self.assertEqual(type(od), OrderedDict)
+        # the object_pairs_hook takes priority over the object_hook
+        self.assertEqual(json.loads(s,
+                                    object_pairs_hook=OrderedDict,
+                                    object_hook=lambda x: None),
+                         OrderedDict(p))
+
+    def check_keys_reuse(self, source, loads):
+        rval = loads(source)
+        (a, b), (c, d) = sorted(rval[0]), sorted(rval[1])
+        self.assertIs(a, c)
+        self.assertIs(b, d)
+
+    def test_keys_reuse_str(self):
+        s = u'[{"a_key": 1, "b_\xe9": 2}, {"a_key": 3, "b_\xe9": 4}]'.encode('utf8')
+        self.check_keys_reuse(s, json.loads)
+
+    def test_keys_reuse_unicode(self):
+        s = u'[{"a_key": 1, "b_\xe9": 2}, {"a_key": 3, "b_\xe9": 4}]'
+        self.check_keys_reuse(s, json.loads)
+
+    def test_empty_strings(self):
+        self.assertEqual(json.loads('""'), "")
+        self.assertEqual(json.loads(u'""'), u"")
+        self.assertEqual(json.loads('[""]'), [""])
+        self.assertEqual(json.loads(u'[""]'), [u""])
diff --git a/tablib/packages/simplejson/tests/test_default.py b/tablib/packages/simplejson/tests/test_default.py
new file mode 100644
index 0000000..139e42b
--- /dev/null
+++ b/tablib/packages/simplejson/tests/test_default.py
@@ -0,0 +1,9 @@
+from unittest import TestCase
+
+import simplejson as json
+
+class TestDefault(TestCase):
+    def test_default(self):
+        self.assertEquals(
+            json.dumps(type, default=repr),
+            json.dumps(repr(type)))
diff --git a/tablib/packages/simplejson/tests/test_dump.py b/tablib/packages/simplejson/tests/test_dump.py
new file mode 100644
index 0000000..8b34004
--- /dev/null
+++ b/tablib/packages/simplejson/tests/test_dump.py
@@ -0,0 +1,27 @@
+from unittest import TestCase
+from cStringIO import StringIO
+
+import simplejson as json
+
+class TestDump(TestCase):
+    def test_dump(self):
+        sio = StringIO()
+        json.dump({}, sio)
+        self.assertEquals(sio.getvalue(), '{}')
+
+    def test_dumps(self):
+        self.assertEquals(json.dumps({}), '{}')
+
+    def test_encode_truefalse(self):
+        self.assertEquals(json.dumps(
+                 {True: False, False: True}, sort_keys=True),
+                 '{"false": true, "true": false}')
+        self.assertEquals(json.dumps(
+                {2: 3.0, 4.0: 5L, False: 1, 6L: True, "7": 0}, sort_keys=True),
+                '{"false": 1, "2": 3.0, "4.0": 5, "6": true, "7": 0}')
+
+    def test_ordered_dict(self):
+        # http://bugs.python.org/issue6105
+        items = [('one', 1), ('two', 2), ('three', 3), ('four', 4), ('five', 5)]
+        s = json.dumps(json.OrderedDict(items))
+        self.assertEqual(s, '{"one": 1, "two": 2, "three": 3, "four": 4, "five": 5}')
\ No newline at end of file
diff --git a/tablib/packages/simplejson/tests/test_encode_basestring_ascii.py b/tablib/packages/simplejson/tests/test_encode_basestring_ascii.py
new file mode 100644
index 0000000..b19631a
--- /dev/null
+++ b/tablib/packages/simplejson/tests/test_encode_basestring_ascii.py
@@ -0,0 +1,41 @@
+from unittest import TestCase
+
+import simplejson.encoder
+
+CASES = [
+    (u'/\\"\ucafe\ubabe\uab98\ufcde\ubcda\uef4a\x08\x0c\n\r\t`1~!@#$%^&*()_+-=[]{}|;:\',./<>?', '"/\\\\\\"\\ucafe\\ubabe\\uab98\\ufcde\\ubcda\\uef4a\\b\\f\\n\\r\\t`1~!@#$%^&*()_+-=[]{}|;:\',./<>?"'),
+    (u'\u0123\u4567\u89ab\ucdef\uabcd\uef4a', '"\\u0123\\u4567\\u89ab\\ucdef\\uabcd\\uef4a"'),
+    (u'controls', '"controls"'),
+    (u'\x08\x0c\n\r\t', '"\\b\\f\\n\\r\\t"'),
+    (u'{"object with 1 member":["array with 1 element"]}', '"{\\"object with 1 member\\":[\\"array with 1 element\\"]}"'),
+    (u' s p a c e d ', '" s p a c e d "'),
+    (u'\U0001d120', '"\\ud834\\udd20"'),
+    (u'\u03b1\u03a9', '"\\u03b1\\u03a9"'),
+    ('\xce\xb1\xce\xa9', '"\\u03b1\\u03a9"'),
+    (u'\u03b1\u03a9', '"\\u03b1\\u03a9"'),
+    ('\xce\xb1\xce\xa9', '"\\u03b1\\u03a9"'),
+    (u'\u03b1\u03a9', '"\\u03b1\\u03a9"'),
+    (u'\u03b1\u03a9', '"\\u03b1\\u03a9"'),
+    (u"`1~!@#$%^&*()_+-={':[,]}|;.</>?", '"`1~!@#$%^&*()_+-={\':[,]}|;.</>?"'),
+    (u'\x08\x0c\n\r\t', '"\\b\\f\\n\\r\\t"'),
+    (u'\u0123\u4567\u89ab\ucdef\uabcd\uef4a', '"\\u0123\\u4567\\u89ab\\ucdef\\uabcd\\uef4a"'),
+]
+
+class TestEncodeBaseStringAscii(TestCase):
+    def test_py_encode_basestring_ascii(self):
+        self._test_encode_basestring_ascii(simplejson.encoder.py_encode_basestring_ascii)
+
+    def test_c_encode_basestring_ascii(self):
+        if not simplejson.encoder.c_encode_basestring_ascii:
+            return
+        self._test_encode_basestring_ascii(simplejson.encoder.c_encode_basestring_ascii)
+
+    def _test_encode_basestring_ascii(self, encode_basestring_ascii):
+        fname = encode_basestring_ascii.__name__
+        for input_string, expect in CASES:
+            result = encode_basestring_ascii(input_string)
+            #self.assertEquals(result, expect,
+            #    '{0!r} != {1!r} for {2}({3!r})'.format(
+            #        result, expect, fname, input_string))
+            self.assertEquals(result, expect,
+                '%r != %r for %s(%r)' % (result, expect, fname, input_string))
diff --git a/tablib/packages/simplejson/tests/test_encode_for_html.py b/tablib/packages/simplejson/tests/test_encode_for_html.py
new file mode 100644
index 0000000..c2d5f80
--- /dev/null
+++ b/tablib/packages/simplejson/tests/test_encode_for_html.py
@@ -0,0 +1,32 @@
+import unittest
+
+import simplejson.decoder
+import simplejson.encoder
+
+
+class TestEncodeForHTML(unittest.TestCase):
+
+    def setUp(self):
+        self.decoder = simplejson.decoder.JSONDecoder()
+        self.encoder = simplejson.encoder.JSONEncoderForHTML()
+
+    def test_basic_encode(self):
+        self.assertEqual(r'"\u0026"', self.encoder.encode('&'))
+        self.assertEqual(r'"\u003c"', self.encoder.encode('<'))
+        self.assertEqual(r'"\u003e"', self.encoder.encode('>'))
+
+    def test_basic_roundtrip(self):
+        for char in '&<>':
+            self.assertEqual(
+                char, self.decoder.decode(
+                    self.encoder.encode(char)))
+
+    def test_prevent_script_breakout(self):
+        bad_string = '</script><script>alert("gotcha")</script>'
+        self.assertEqual(
+            r'"\u003c/script\u003e\u003cscript\u003e'
+            r'alert(\"gotcha\")\u003c/script\u003e"',
+            self.encoder.encode(bad_string))
+        self.assertEqual(
+            bad_string, self.decoder.decode(
+                self.encoder.encode(bad_string)))
diff --git a/tablib/packages/simplejson/tests/test_fail.py b/tablib/packages/simplejson/tests/test_fail.py
new file mode 100644
index 0000000..646c0f4
--- /dev/null
+++ b/tablib/packages/simplejson/tests/test_fail.py
@@ -0,0 +1,91 @@
+from unittest import TestCase
+
+import simplejson as json
+
+# Fri Dec 30 18:57:26 2005
+JSONDOCS = [
+    # http://json.org/JSON_checker/test/fail1.json
+    '"A JSON payload should be an object or array, not a string."',
+    # http://json.org/JSON_checker/test/fail2.json
+    '["Unclosed array"',
+    # http://json.org/JSON_checker/test/fail3.json
+    '{unquoted_key: "keys must be quoted}',
+    # http://json.org/JSON_checker/test/fail4.json
+    '["extra comma",]',
+    # http://json.org/JSON_checker/test/fail5.json
+    '["double extra comma",,]',
+    # http://json.org/JSON_checker/test/fail6.json
+    '[   , "<-- missing value"]',
+    # http://json.org/JSON_checker/test/fail7.json
+    '["Comma after the close"],',
+    # http://json.org/JSON_checker/test/fail8.json
+    '["Extra close"]]',
+    # http://json.org/JSON_checker/test/fail9.json
+    '{"Extra comma": true,}',
+    # http://json.org/JSON_checker/test/fail10.json
+    '{"Extra value after close": true} "misplaced quoted value"',
+    # http://json.org/JSON_checker/test/fail11.json
+    '{"Illegal expression": 1 + 2}',
+    # http://json.org/JSON_checker/test/fail12.json
+    '{"Illegal invocation": alert()}',
+    # http://json.org/JSON_checker/test/fail13.json
+    '{"Numbers cannot have leading zeroes": 013}',
+    # http://json.org/JSON_checker/test/fail14.json
+    '{"Numbers cannot be hex": 0x14}',
+    # http://json.org/JSON_checker/test/fail15.json
+    '["Illegal backslash escape: \\x15"]',
+    # http://json.org/JSON_checker/test/fail16.json
+    '["Illegal backslash escape: \\\'"]',
+    # http://json.org/JSON_checker/test/fail17.json
+    '["Illegal backslash escape: \\017"]',
+    # http://json.org/JSON_checker/test/fail18.json
+    '[[[[[[[[[[[[[[[[[[[["Too deep"]]]]]]]]]]]]]]]]]]]]',
+    # http://json.org/JSON_checker/test/fail19.json
+    '{"Missing colon" null}',
+    # http://json.org/JSON_checker/test/fail20.json
+    '{"Double colon":: null}',
+    # http://json.org/JSON_checker/test/fail21.json
+    '{"Comma instead of colon", null}',
+    # http://json.org/JSON_checker/test/fail22.json
+    '["Colon instead of comma": false]',
+    # http://json.org/JSON_checker/test/fail23.json
+    '["Bad value", truth]',
+    # http://json.org/JSON_checker/test/fail24.json
+    "['single quote']",
+    # http://code.google.com/p/simplejson/issues/detail?id=3
+    u'["A\u001FZ control characters in string"]',
+]
+
+SKIPS = {
+    1: "why not have a string payload?",
+    18: "spec doesn't specify any nesting limitations",
+}
+
+class TestFail(TestCase):
+    def test_failures(self):
+        for idx, doc in enumerate(JSONDOCS):
+            idx = idx + 1
+            if idx in SKIPS:
+                json.loads(doc)
+                continue
+            try:
+                json.loads(doc)
+            except json.JSONDecodeError:
+                pass
+            else:
+                #self.fail("Expected failure for fail{0}.json: {1!r}".format(idx, doc))
+                self.fail("Expected failure for fail%d.json: %r" % (idx, doc))
+
+    def test_array_decoder_issue46(self):
+        # http://code.google.com/p/simplejson/issues/detail?id=46
+        for doc in [u'[,]', '[,]']:
+            try:
+                json.loads(doc)
+            except json.JSONDecodeError, e:
+                self.assertEquals(e.pos, 1)
+                self.assertEquals(e.lineno, 1)
+                self.assertEquals(e.colno, 1)
+            except Exception, e:
+                self.fail("Unexpected exception raised %r %s" % (e, e))
+            else:
+                self.fail("Unexpected success parsing '[,]'")
\ No newline at end of file
diff --git a/tablib/packages/simplejson/tests/test_float.py b/tablib/packages/simplejson/tests/test_float.py
new file mode 100644
index 0000000..94502c6
--- /dev/null
+++ b/tablib/packages/simplejson/tests/test_float.py
@@ -0,0 +1,19 @@
+import math
+from unittest import TestCase
+
+import simplejson as json
+
+class TestFloat(TestCase):
+    def test_floats(self):
+        for num in [1617161771.7650001, math.pi, math.pi**100,
+                    math.pi**-100, 3.1]:
+            self.assertEquals(float(json.dumps(num)), num)
+            self.assertEquals(json.loads(json.dumps(num)), num)
+            self.assertEquals(json.loads(unicode(json.dumps(num))), num)
+
+    def test_ints(self):
+        for num in [1, 1L, 1<<32, 1<<64]:
+            self.assertEquals(json.dumps(num), str(num))
+            self.assertEquals(int(json.dumps(num)), num)
+            self.assertEquals(json.loads(json.dumps(num)), num)
+            self.assertEquals(json.loads(unicode(json.dumps(num))), num)
diff --git a/tablib/packages/simplejson/tests/test_indent.py b/tablib/packages/simplejson/tests/test_indent.py
new file mode 100644
index 0000000..985831b
--- /dev/null
+++ b/tablib/packages/simplejson/tests/test_indent.py
@@ -0,0 +1,53 @@
+from unittest import TestCase
+
+import simplejson as json
+import textwrap
+
+class TestIndent(TestCase):
+    def test_indent(self):
+        h = [['blorpie'], ['whoops'], [], 'd-shtaeou', 'd-nthiouh',
+             'i-vhbjkhnth',
+             {'nifty': 87}, {'field': 'yes', 'morefield': False} ]
+
+        expect = textwrap.dedent("""\
+        [
+        \t[
+        \t\t"blorpie"
+        \t],
+        \t[
+        \t\t"whoops"
+        \t],
+        \t[],
+        \t"d-shtaeou",
+        \t"d-nthiouh",
+        \t"i-vhbjkhnth",
+        \t{
+        \t\t"nifty": 87
+        \t},
+        \t{
+        \t\t"field": "yes",
+        \t\t"morefield": false
+        \t}
+        ]""")
+
+
+        d1 = json.dumps(h)
+        d2 = json.dumps(h, indent='\t', sort_keys=True, separators=(',', ': '))
+        d3 = json.dumps(h, indent='  ', sort_keys=True, separators=(',', ': '))
+        d4 = json.dumps(h, indent=2, sort_keys=True, separators=(',', ': '))
+
+        h1 = json.loads(d1)
+        h2 = json.loads(d2)
+        h3 = json.loads(d3)
+        h4 = json.loads(d4)
+
+        self.assertEquals(h1, h)
+        self.assertEquals(h2, h)
+        self.assertEquals(h3, h)
+        self.assertEquals(h4, h)
+        self.assertEquals(d3, expect.replace('\t', '  '))
+        self.assertEquals(d4, expect.replace('\t', '  '))
+        # NOTE: Python 2.4 textwrap.dedent converts tabs to spaces,
+        #       so the following is expected to fail. Python 2.4 is not a
+        #       supported platform in simplejson 2.1.0+.
+        self.assertEquals(d2, expect)
diff --git a/tablib/packages/simplejson/tests/test_pass1.py b/tablib/packages/simplejson/tests/test_pass1.py
new file mode 100644
index 0000000..c3d6302
--- /dev/null
+++ b/tablib/packages/simplejson/tests/test_pass1.py
@@ -0,0 +1,76 @@
+from unittest import TestCase
+
+import simplejson as json
+
+# from http://json.org/JSON_checker/test/pass1.json
+JSON = r'''
+[
+    "JSON Test Pattern pass1",
+    {"object with 1 member":["array with 1 element"]},
+    {},
+    [],
+    -42,
+    true,
+    false,
+    null,
+    {
+        "integer": 1234567890,
+        "real": -9876.543210,
+        "e": 0.123456789e-12,
+        "E": 1.234567890E+34,
+        "":  23456789012E666,
+        "zero": 0,
+        "one": 1,
+        "space": " ",
+        "quote": "\"",
+        "backslash": "\\",
+        "controls": "\b\f\n\r\t",
+        "slash": "/ & \/",
+        "alpha": "abcdefghijklmnopqrstuvwyz",
+        "ALPHA": "ABCDEFGHIJKLMNOPQRSTUVWYZ",
+        "digit": "0123456789",
+        "special": "`1~!@#$%^&*()_+-={':[,]}|;.</>?",
+        "hex": "\u0123\u4567\u89AB\uCDEF\uabcd\uef4A",
+        "true": true,
+        "false": false,
+        "null": null,
+        "array":[  ],
+        "object":{  },
+        "address": "50 St. James Street",
+        "url": "http://www.JSON.org/",
+        "comment": "// /* <!-- --",
+        "# -- --> */": " ",
+        " s p a c e d " :[1,2 , 3
+
+,
+
+4 , 5        ,          6           ,7        ],
+        "compact": [1,2,3,4,5,6,7],
+        "jsontext": "{\"object with 1 member\":[\"array with 1 element\"]}",
+        "quotes": "&#34; \u0022 %22 0x22 034 &#x22;",
+        "\/\\\"\uCAFE\uBABE\uAB98\uFCDE\ubcda\uef4A\b\f\n\r\t`1~!@#$%^&*()_+-=[]{}|;:',./<>?"
+: "A key can be any string"
+    },
+    0.5 ,98.6
+,
+99.44
+,
+
+1066
+
+
+,"rosebud"]
+'''
+
+class TestPass1(TestCase):
+    def test_parse(self):
+        # test in/out equivalence and parsing
+        res = json.loads(JSON)
+        out = json.dumps(res)
+        self.assertEquals(res, json.loads(out))
+        try:
+            json.dumps(res, allow_nan=False)
+        except ValueError:
+            pass
+        else:
+            self.fail("23456789012E666 should be out of range")
diff --git a/tablib/packages/simplejson/tests/test_pass2.py b/tablib/packages/simplejson/tests/test_pass2.py
new file mode 100644
index 0000000..de4ee00
--- /dev/null
+++ b/tablib/packages/simplejson/tests/test_pass2.py
@@ -0,0 +1,14 @@
+from unittest import TestCase
+import simplejson as json
+
+# from http://json.org/JSON_checker/test/pass2.json
+JSON = r'''
+[[[[[[[[[[[[[[[[[[["Not too deep"]]]]]]]]]]]]]]]]]]]
+'''
+
+class TestPass2(TestCase):
+    def test_parse(self):
+        # test in/out equivalence and parsing
+        res = json.loads(JSON)
+        out = json.dumps(res)
+        self.assertEquals(res, json.loads(out))
diff --git a/tablib/packages/simplejson/tests/test_pass3.py b/tablib/packages/simplejson/tests/test_pass3.py
new file mode 100644
index 0000000..f591aba
--- /dev/null
+++ b/tablib/packages/simplejson/tests/test_pass3.py
@@ -0,0 +1,20 @@
+from unittest import TestCase
+
+import simplejson as json
+
+# from http://json.org/JSON_checker/test/pass3.json
+JSON = r'''
+{
+    "JSON Test Pattern pass3": {
+        "The outermost value": "must be an object or array.",
+        "In this test": "It is an object."
+    }
+}
+'''
+
+class TestPass3(TestCase):
+    def test_parse(self):
+        # test in/out equivalence and parsing
+        res = json.loads(JSON)
+        out = json.dumps(res)
+        self.assertEquals(res, json.loads(out))
diff --git a/tablib/packages/simplejson/tests/test_recursion.py b/tablib/packages/simplejson/tests/test_recursion.py
new file mode 100644
index 0000000..97422a6
--- /dev/null
+++ b/tablib/packages/simplejson/tests/test_recursion.py
@@ -0,0 +1,67 @@
+from unittest import TestCase
+
+import simplejson as json
+
+class JSONTestObject:
+    pass
+
+
+class RecursiveJSONEncoder(json.JSONEncoder):
+    recurse = False
+    def default(self, o):
+        if o is JSONTestObject:
+            if self.recurse:
+                return [JSONTestObject]
+            else:
+                return 'JSONTestObject'
+        return json.JSONEncoder.default(o)
+
+
+class TestRecursion(TestCase):
+    def test_listrecursion(self):
+        x = []
+        x.append(x)
+        try:
+            json.dumps(x)
+        except ValueError:
+            pass
+        else:
+            self.fail("didn't raise ValueError on list recursion")
+        x = []
+        y = [x]
+        x.append(y)
+        try:
+            json.dumps(x)
+        except ValueError:
+            pass
+        else:
+            self.fail("didn't raise ValueError on alternating list recursion")
+        y = []
+        x = [y, y]
+        # ensure that the marker is cleared
+        json.dumps(x)
+
+    def test_dictrecursion(self):
+        x = {}
+        x["test"] = x
+        try:
+            json.dumps(x)
+        except ValueError:
+            pass
+        else:
+            self.fail("didn't raise ValueError on dict recursion")
+        x = {}
+        y = {"a": x, "b": x}
+        # ensure that the marker is cleared
+        json.dumps(x)
+
+    def test_defaultrecursion(self):
+        enc = RecursiveJSONEncoder()
+        self.assertEquals(enc.encode(JSONTestObject), '"JSONTestObject"')
+        enc.recurse = True
+        try:
+            enc.encode(JSONTestObject)
+        except ValueError:
+            pass
+        else:
+            self.fail("didn't raise ValueError on default recursion")
diff --git a/tablib/packages/simplejson/tests/test_scanstring.py b/tablib/packages/simplejson/tests/test_scanstring.py
new file mode 100644
index 0000000..a7fcd46
--- /dev/null
+++ b/tablib/packages/simplejson/tests/test_scanstring.py
@@ -0,0 +1,117 @@
+import sys
+from unittest import TestCase
+
+import simplejson as json
+import simplejson.decoder
+
+class TestScanString(TestCase):
+    def test_py_scanstring(self):
+        self._test_scanstring(simplejson.decoder.py_scanstring)
+
+    def test_c_scanstring(self):
+        if not simplejson.decoder.c_scanstring:
+            return
+        self._test_scanstring(simplejson.decoder.c_scanstring)
+
+    def _test_scanstring(self, scanstring):
+        self.assertEquals(
+            scanstring('"z\\ud834\\udd20x"', 1, None, True),
+            (u'z\U0001d120x', 16))
+
+        if sys.maxunicode == 65535:
+            self.assertEquals(
+                scanstring(u'"z\U0001d120x"', 1, None, True),
+                (u'z\U0001d120x', 6))
+        else:
+            self.assertEquals(
+                scanstring(u'"z\U0001d120x"', 1, None, True),
+                (u'z\U0001d120x', 5))
+
+        self.assertEquals(
+            scanstring('"\\u007b"', 1, None, True),
+            (u'{', 8))
+
+        self.assertEquals(
+            scanstring('"A JSON payload should be an object or array, not a string."', 1, None, True),
+            (u'A JSON payload should be an object or array, not a string.', 60))
+
+        self.assertEquals(
+            scanstring('["Unclosed array"', 2, None, True),
+            (u'Unclosed array', 17))
+
+        self.assertEquals(
+            scanstring('["extra comma",]', 2, None, True),
+            (u'extra comma', 14))
+
+        self.assertEquals(
+            scanstring('["double extra comma",,]', 2, None, True),
+            (u'double extra comma', 21))
+
+        self.assertEquals(
+            scanstring('["Comma after the close"],', 2, None, True),
+            (u'Comma after the close', 24))
+
+        self.assertEquals(
+            scanstring('["Extra close"]]', 2, None, True),
+            (u'Extra close', 14))
+
+        self.assertEquals(
+            scanstring('{"Extra comma": true,}', 2, None, True),
+            (u'Extra comma', 14))
+
+        self.assertEquals(
+            scanstring('{"Extra value after close": true} "misplaced quoted value"', 2, None, True),
+            (u'Extra value after close', 26))
+
+        self.assertEquals(
+            scanstring('{"Illegal expression": 1 + 2}', 2, None, True),
+            (u'Illegal expression', 21))
+
+        self.assertEquals(
+            scanstring('{"Illegal invocation": alert()}', 2, None, True),
+            (u'Illegal invocation', 21))
+
+        self.assertEquals(
+            scanstring('{"Numbers cannot have leading zeroes": 013}', 2, None, True),
+            (u'Numbers cannot have leading zeroes', 37))
+
+        self.assertEquals(
+            scanstring('{"Numbers cannot be hex": 0x14}', 2, None, True),
+            (u'Numbers cannot be hex', 24))
+
+        self.assertEquals(
+            scanstring('[[[[[[[[[[[[[[[[[[[["Too deep"]]]]]]]]]]]]]]]]]]]]', 21, None, True),
+            (u'Too deep', 30))
+
+        self.assertEquals(
+            scanstring('{"Missing colon" null}', 2, None, True),
+            (u'Missing colon', 16))
+
+        self.assertEquals(
+            scanstring('{"Double colon":: null}', 2, None, True),
+            (u'Double colon', 15))
+
+        self.assertEquals(
+            scanstring('{"Comma instead of colon", null}', 2, None, True),
+            (u'Comma instead of colon', 25))
+
+        self.assertEquals(
+            scanstring('["Colon instead of comma": false]', 2, None, True),
+            (u'Colon instead of comma', 25))
+
+        self.assertEquals(
+            scanstring('["Bad value", truth]', 2, None, True),
+            (u'Bad value', 12))
+
+    def test_issue3623(self):
+        self.assertRaises(ValueError, json.decoder.scanstring, "xxx", 1,
+                          "xxx")
+        self.assertRaises(UnicodeDecodeError,
+                          json.encoder.encode_basestring_ascii, "xx\xff")
+
+    def test_overflow(self):
+        # Python 2.5 does not have maxsize
+        maxsize = getattr(sys, 'maxsize', sys.maxint)
+        self.assertRaises(OverflowError, json.decoder.scanstring, "xxx",
+                          maxsize + 1)
+
diff --git a/tablib/packages/simplejson/tests/test_separators.py b/tablib/packages/simplejson/tests/test_separators.py
new file mode 100644
index 0000000..cbda93c
--- /dev/null
+++ b/tablib/packages/simplejson/tests/test_separators.py
@@ -0,0 +1,42 @@
+import textwrap
+from unittest import TestCase
+
+import simplejson as json
+
+
+class TestSeparators(TestCase):
+    def test_separators(self):
+        h = [['blorpie'], ['whoops'], [], 'd-shtaeou', 'd-nthiouh', 'i-vhbjkhnth',
+             {'nifty': 87}, {'field': 'yes', 'morefield': False} ]
+
+        expect = textwrap.dedent("""\
+        [
+          [
+            "blorpie"
+          ] ,
+          [
+            "whoops"
+          ] ,
+          [] ,
+          "d-shtaeou" ,
+          "d-nthiouh" ,
+          "i-vhbjkhnth" ,
+          {
+            "nifty" : 87
+          } ,
+          {
+            "field" : "yes" ,
+            "morefield" : false
+          }
+        ]""")
+
+
+        d1 = json.dumps(h)
+        d2 = json.dumps(h, indent='  ', sort_keys=True, separators=(' ,', ' : '))
+
+        h1 = json.loads(d1)
+        h2 = json.loads(d2)
+
+        self.assertEquals(h1, h)
+        self.assertEquals(h2, h)
+        self.assertEquals(d2, expect)
diff --git a/tablib/packages/simplejson/tests/test_speedups.py b/tablib/packages/simplejson/tests/test_speedups.py
new file mode 100644
index 0000000..4bf0875
--- /dev/null
+++ b/tablib/packages/simplejson/tests/test_speedups.py
@@ -0,0 +1,21 @@
+import decimal
+from unittest import TestCase
+
+from simplejson import decoder, encoder, scanner
+
+def has_speedups():
+    return encoder.c_make_encoder is not None
+
+class TestDecode(TestCase):
+    def test_make_scanner(self):
+        if not has_speedups():
+            return
+        self.assertRaises(AttributeError, scanner.c_make_scanner, 1)
+
+    def test_make_encoder(self):
+        if not has_speedups():
+            return
+        self.assertRaises(TypeError, encoder.c_make_encoder,
+            None,
+            "\xCD\x7D\x3D\x4E\x12\x4C\xF9\x79\xD7\x52\xBA\x82\xF2\x27\x4A\x7D\xA0\xCA\x75",
+            None)
diff --git a/tablib/packages/simplejson/tests/test_unicode.py b/tablib/packages/simplejson/tests/test_unicode.py
new file mode 100644
index 0000000..f73e5bf
--- /dev/null
+++ b/tablib/packages/simplejson/tests/test_unicode.py
@@ -0,0 +1,99 @@
+from unittest import TestCase
+
+import simplejson as json
+
+class TestUnicode(TestCase):
+    def test_encoding1(self):
+        encoder = json.JSONEncoder(encoding='utf-8')
+        u = u'\N{GREEK SMALL LETTER ALPHA}\N{GREEK CAPITAL LETTER OMEGA}'
+        s = u.encode('utf-8')
+        ju = encoder.encode(u)
+        js = encoder.encode(s)
+        self.assertEquals(ju, js)
+
+    def test_encoding2(self):
+        u = u'\N{GREEK SMALL LETTER ALPHA}\N{GREEK CAPITAL LETTER OMEGA}'
+        s = u.encode('utf-8')
+        ju = json.dumps(u, encoding='utf-8')
+        js = json.dumps(s, encoding='utf-8')
+        self.assertEquals(ju, js)
+
+    def test_encoding3(self):
+        u = u'\N{GREEK SMALL LETTER ALPHA}\N{GREEK CAPITAL LETTER OMEGA}'
+        j = json.dumps(u)
+        self.assertEquals(j, '"\\u03b1\\u03a9"')
+
+    def test_encoding4(self):
+        u = u'\N{GREEK SMALL LETTER ALPHA}\N{GREEK CAPITAL LETTER OMEGA}'
+        j = json.dumps([u])
+        self.assertEquals(j, '["\\u03b1\\u03a9"]')
+
+    def test_encoding5(self):
+        u = u'\N{GREEK SMALL LETTER ALPHA}\N{GREEK CAPITAL LETTER OMEGA}'
+        j = json.dumps(u, ensure_ascii=False)
+        self.assertEquals(j, u'"' + u + u'"')
+
+    def test_encoding6(self):
+        u = u'\N{GREEK SMALL LETTER ALPHA}\N{GREEK CAPITAL LETTER OMEGA}'
+        j = json.dumps([u], ensure_ascii=False)
+        self.assertEquals(j, u'["' + u + u'"]')
+
+    def test_big_unicode_encode(self):
+        u = u'\U0001d120'
+        self.assertEquals(json.dumps(u), '"\\ud834\\udd20"')
+        self.assertEquals(json.dumps(u, ensure_ascii=False), u'"\U0001d120"')
+
+    def test_big_unicode_decode(self):
+        u = u'z\U0001d120x'
+        self.assertEquals(json.loads('"' + u + '"'), u)
+        self.assertEquals(json.loads('"z\\ud834\\udd20x"'), u)
+
+    def test_unicode_decode(self):
+        for i in range(0, 0xd7ff):
+            u = unichr(i)
+            #s = '"\\u{0:04x}"'.format(i)
+            s = '"\\u%04x"' % (i,)
+            self.assertEquals(json.loads(s), u)
+
+    def test_object_pairs_hook_with_unicode(self):
+        s = u'{"xkd":1, "kcw":2, "art":3, "hxm":4, "qrt":5, "pad":6, "hoy":7}'
+        p = [(u"xkd", 1), (u"kcw", 2), (u"art", 3), (u"hxm", 4),
+             (u"qrt", 5), (u"pad", 6), (u"hoy", 7)]
+        self.assertEqual(json.loads(s), eval(s))
+        self.assertEqual(json.loads(s, object_pairs_hook=lambda x: x), p)
+        od = json.loads(s, object_pairs_hook=json.OrderedDict)
+        self.assertEqual(od, json.OrderedDict(p))
+        self.assertEqual(type(od), json.OrderedDict)
+        # the object_pairs_hook takes priority over the object_hook
+        self.assertEqual(json.loads(s,
+                                    object_pairs_hook=json.OrderedDict,
+                                    object_hook=lambda x: None),
+                         json.OrderedDict(p))
+
+
+    def test_default_encoding(self):
+        self.assertEquals(json.loads(u'{"a": "\xe9"}'.encode('utf-8')),
+            {'a': u'\xe9'})
+
+    def test_unicode_preservation(self):
+        self.assertEquals(type(json.loads(u'""')), unicode)
+        self.assertEquals(type(json.loads(u'"a"')), unicode)
+        self.assertEquals(type(json.loads(u'["a"]')[0]), unicode)
+
+    def test_ensure_ascii_false_returns_unicode(self):
+        # http://code.google.com/p/simplejson/issues/detail?id=48
+        self.assertEquals(type(json.dumps([], ensure_ascii=False)), unicode)
+        self.assertEquals(type(json.dumps(0, ensure_ascii=False)), unicode)
+        self.assertEquals(type(json.dumps({}, ensure_ascii=False)), unicode)
+        self.assertEquals(type(json.dumps("", ensure_ascii=False)), unicode)
+
+    def test_ensure_ascii_false_bytestring_encoding(self):
+        # http://code.google.com/p/simplejson/issues/detail?id=48
+        doc1 = {u'quux': 'Arr\xc3\xaat sur images'}
+        doc2 = {u'quux': u'Arr\xeat sur images'}
+        doc_ascii = '{"quux": "Arr\\u00eat sur images"}'
+        doc_unicode = u'{"quux": "Arr\xeat sur images"}'
+        self.assertEquals(json.dumps(doc1), doc_ascii)
+        self.assertEquals(json.dumps(doc2), doc_ascii)
+        self.assertEquals(json.dumps(doc1, ensure_ascii=False), doc_unicode)
+        self.assertEquals(json.dumps(doc2, ensure_ascii=False), doc_unicode)
diff --git a/tablib/packages/simplejson/tool.py b/tablib/packages/simplejson/tool.py
new file mode 100644
index 0000000..73370db
--- /dev/null
+++ b/tablib/packages/simplejson/tool.py
@@ -0,0 +1,39 @@
+r"""Command-line tool to validate and pretty-print JSON
+
+Usage::
+
+    $ echo '{"json":"obj"}' | python -m simplejson.tool
+    {
+        "json": "obj"
+    }
+    $ echo '{ 1.2:3.4}' | python -m simplejson.tool
+    Expecting property name: line 1 column 2 (char 2)
+
+"""
+import sys
+import simplejson as json
+
+def main():
+    if len(sys.argv) == 1:
+        infile = sys.stdin
+        outfile = sys.stdout
+    elif len(sys.argv) == 2:
+        infile = open(sys.argv[1], 'rb')
+        outfile = sys.stdout
+    elif len(sys.argv) == 3:
+        infile = open(sys.argv[1], 'rb')
+        outfile = open(sys.argv[2], 'wb')
+    else:
+        raise SystemExit(sys.argv[0] + " [infile [outfile]]")
+    try:
+        obj = json.load(infile,
+                        object_pairs_hook=json.OrderedDict,
+                        use_decimal=True)
+    except ValueError, e:
+        raise SystemExit(e)
+    json.dump(obj, outfile, sort_keys=True, indent='    ', use_decimal=True)
+    outfile.write('\n')
+
+
+if __name__ == '__main__':
+    main()
diff --git a/tablib/packages/xlwt/BIFFRecords.py b/tablib/packages/xlwt/BIFFRecords.py
new file mode 100644
index 0000000..4660c03
--- /dev/null
+++ b/tablib/packages/xlwt/BIFFRecords.py
@@ -0,0 +1,2393 @@
+# -*- coding: cp1252 -*-
+from struct import pack
+from UnicodeUtils import upack1, upack2
+import sys
+
+class SharedStringTable(object):
+    _SST_ID = 0x00FC
+    _CONTINUE_ID = 0x003C
+
+    def __init__(self, encoding):
+        self.encoding = encoding
+        self._str_indexes = {}
+        self._tally = []
+        self._add_calls = 0
+        # Following 3 attrs are used for temporary storage in the
+        # get_biff_record() method and methods called by it. The pseudo-
+        # initialisation here is for documentation purposes only.
+        self._sst_record = None
+        self._continues = None
+        self._current_piece = None
+
+    def add_str(self, s):
+        if self.encoding != 'ascii' and not isinstance(s, unicode):
+            s = unicode(s, self.encoding)
+        self._add_calls += 1
+        if s not in self._str_indexes:
+            idx = len(self._str_indexes)
+            self._str_indexes[s] = idx
+            self._tally.append(1)
+        else:
+            idx = self._str_indexes[s]
+            self._tally[idx] += 1
+        return idx
+
+    def del_str(self, idx):
+        # This is called when we are replacing the contents of a string cell.
+        assert self._tally[idx] > 0
+        self._tally[idx] -= 1
+        self._add_calls -= 1
+
+    def str_index(self, s):
+        return self._str_indexes[s]
+
+    def get_biff_record(self):
+        self._sst_record = ''
+        self._continues = [None, None]
+        self._current_piece = pack('<II', 0, 0)
+        data = [(idx, s) for s, idx in self._str_indexes.iteritems()]
+        data.sort() # in index order
+        for idx, s in data:
+            if self._tally[idx] == 0:
+                s = u''
+            self._add_to_sst(s)
+        del data
+        self._new_piece()
+        self._continues[0] = pack('<2HII', self._SST_ID, len(self._sst_record), self._add_calls, len(self._str_indexes))
+        self._continues[1] = self._sst_record[8:]
+        self._sst_record = None
+        self._current_piece = None
+        result = ''.join(self._continues)
+        self._continues = None
+        return result
+
+
+    def _add_to_sst(self, s):
+        u_str = upack2(s, self.encoding)
+
+        is_unicode_str = u_str[2] == '\x01'
+        if is_unicode_str:
+            atom_len = 5 # 2 byte -- len,
+                         # 1 byte -- options,
+                         # 2 byte -- 1st sym
+        else:
+            atom_len = 4 # 2 byte -- len,
+                         # 1 byte -- options,
+                         # 1 byte -- 1st sym
+
+        self._save_atom(u_str[0:atom_len])
+        self._save_splitted(u_str[atom_len:], is_unicode_str)
+
+    def _new_piece(self):
+        if self._sst_record == '':
+            self._sst_record = self._current_piece
+        else:
+            curr_piece_len = len(self._current_piece)
+            self._continues.append(pack('<2H%ds'%curr_piece_len, self._CONTINUE_ID, curr_piece_len, self._current_piece))
+        self._current_piece = ''
+
+    def _save_atom(self, s):
+        atom_len = len(s)
+        free_space = 0x2020 - len(self._current_piece)
+        if free_space < atom_len:
+            self._new_piece()
+        self._current_piece += s
+
+    def _save_splitted(self, s, is_unicode_str):
+        i = 0
+        str_len = len(s)
+        while i < str_len:
+            piece_len = len(self._current_piece)
+            free_space = 0x2020 - piece_len
+            tail_len = str_len - i
+            need_more_space = free_space < tail_len
+
+            if not need_more_space:
+                atom_len = tail_len
+            else:
+                if is_unicode_str:
+                    atom_len = free_space & 0xFFFE
+                else:
+                    atom_len = free_space
+
+            self._current_piece += s[i:i+atom_len]
+
+            if need_more_space:
+                self._new_piece()
+                if is_unicode_str:
+                    self._current_piece += '\x01'
+                else:
+                    self._current_piece += '\x00'
+
+            i += atom_len
+
+
+class BiffRecord(object):
+
+    _rec_data = '' # class attribute; child classes need to set this.
+
+    # Sheer waste.
+    # def __init__(self):
+    #     self._rec_data = ''
+
+    def get_rec_id(self):
+        return _REC_ID
+
+    def get_rec_header(self):
+        return pack('<2H', self._REC_ID, len(self._rec_data))
+
+    # Not over-ridden by any child classes, never called (except by "get"; see below).
+    # def get_rec_data(self):
+    #     return self._rec_data
+
+    def get(self):
+        # data = self.get_rec_data()
+        data = self._rec_data
+
+        if len(data) > 0x2020: # limit for BIFF7/8
+            chunks = []
+            pos = 0
+            while pos < len(data):
+                chunk_pos = pos + 0x2020
+                chunk = data[pos:chunk_pos]
+                chunks.append(chunk)
+                pos = chunk_pos
+            continues = pack('<2H', self._REC_ID, len(chunks[0])) + chunks[0]
+            for chunk in chunks[1:]:
+                continues += pack('<2H%ds'%len(chunk), 0x003C, len(chunk), chunk)
+                # 0x003C -- CONTINUE record id
+            return continues
+        else:
+            return self.get_rec_header() + data
+
+
+class Biff8BOFRecord(BiffRecord):
+    """
+    Offset Size Contents
+    0      2    Version, contains 0600H for BIFF8 and BIFF8X
+    2      2    Type of the following data:
+                  0005H = Workbook globals
+                  0006H = Visual Basic module
+                  0010H = Worksheet
+                  0020H = Chart
+                  0040H = Macro sheet
+                  0100H = Workspace file
+    4      2    Build identifier
+    6      2    Build year
+    8      4    File history flags
+    12     4    Lowest Excel version that can read all records in this file
+    """
+    _REC_ID      = 0x0809
+    # stream types
+    BOOK_GLOBAL = 0x0005
+    VB_MODULE   = 0x0006
+    WORKSHEET   = 0x0010
+    CHART       = 0x0020
+    MACROSHEET  = 0x0040
+    WORKSPACE   = 0x0100
+
+    def __init__(self, rec_type):
+        version  = 0x0600
+        build    = 0x0DBB
+        year     = 0x07CC
+        file_hist_flags = 0x00L
+        ver_can_read    = 0x06L
+
+        self._rec_data = pack('<4H2I', version, rec_type, build, year, file_hist_flags, ver_can_read)
+
+
+class InteraceHdrRecord(BiffRecord):
+    _REC_ID = 0x00E1
+
+    def __init__(self):
+        self._rec_data = pack('BB', 0xB0, 0x04)
+
+
+class InteraceEndRecord(BiffRecord):
+    _REC_ID = 0x00E2
+
+    def __init__(self):
+        self._rec_data = ''
+
+
+class MMSRecord(BiffRecord):
+    _REC_ID = 0x00C1
+
+    def __init__(self):
+        self._rec_data = pack('<H', 0x00)
+
+
+class WriteAccessRecord(BiffRecord):
+    """
+    This record is part of the file protection. It contains the name of the
+    user  that  has  saved  the  file. The user name is always stored as an
+    equal-sized  string.  All  unused  characters after the name are filled
+    with space characters. It is not required to write the mentioned string
+    length. Every other length will be accepted too.
+    """
+    _REC_ID = 0x005C
+
+    def __init__(self, owner):
+        uowner = owner[0:0x30]
+        uowner_len = len(uowner)
+        self._rec_data = pack('%ds%ds' % (uowner_len, 0x70 - uowner_len), uowner, ' '*(0x70 - uowner_len))
+
+
+class DSFRecord(BiffRecord):
+    """
+    This  record  specifies  if the file contains an additional BIFF5/BIFF7
+    workbook stream.
+    Record DSF, BIFF8:
+    Offset Size Contents
+    0        2     0 = Only the BIFF8 Workbook stream is present
+                   1 = Additional BIFF5/BIFF7 Book stream is in the file
+    A  double  stream file can be read by Excel 5.0 and Excel 95, and still
+    contains  all  new  features  added to BIFF8 (which are left out in the
+    BIFF5/BIFF7 Book stream).
+    """
+    _REC_ID = 0x0161
+
+    def __init__(self):
+        self._rec_data = pack('<H', 0x00)
+
+
+class TabIDRecord(BiffRecord):
+    _REC_ID = 0x013D
+
+    def __init__(self, sheetcount):
+        for i in range(sheetcount):
+            self._rec_data += pack('<H', i+1)
+
+
+class FnGroupCountRecord(BiffRecord):
+    _REC_ID = 0x009C
+
+    def __init__(self):
+        self._rec_data = pack('BB', 0x0E, 0x00)
+
+
+class WindowProtectRecord(BiffRecord):
+    """
+    This record is part of the worksheet/workbook protection. It determines
+    whether  the window configuration of this document is protected. Window
+    protection is not active, if this record is omitted.
+    """
+    _REC_ID = 0x0019
+
+    def __init__(self, wndprotect):
+        self._rec_data = pack('<H', wndprotect)
+
+
+class ObjectProtectRecord(BiffRecord):
+    """
+    This record is part of the worksheet/workbook protection.
+    It determines whether the objects of the current sheet are protected.
+    Object protection is not active, if this record is omitted.
+    """
+    _REC_ID = 0x0063
+
+
+    def __init__(self, objprotect):
+        self._rec_data = pack('<H', objprotect)
+
+
+class ScenProtectRecord(BiffRecord):
+    """
+    This record is part of the worksheet/workbook protection. It
+    determines whether the scenarios of the current sheet are protected.
+    Scenario protection is not active, if this record is omitted.
+    """
+    _REC_ID = 0x00DD
+
+
+    def __init__(self, scenprotect):
+        self._rec_data = pack('<H', scenprotect)
+
+
+class ProtectRecord(BiffRecord):
+    """
+    This  record is part of the worksheet/workbook protection. It specifies
+    whether  a  worksheet  or a workbook is protected against modification.
+    Protection is not active, if this record is omitted.
+    """
+
+    _REC_ID = 0x0012
+
+    def __init__(self, protect):
+        self._rec_data = pack('<H', protect)
+
+
+class PasswordRecord(BiffRecord):
+    """
+    This record is part of the worksheet/workbook protection. It
+    stores a 16-bit hash value, calculated from the worksheet or workbook
+    protection password.
+    """
+    _REC_ID = 0x0013
+    def passwd_hash(self, plaintext):
+        """
+        Based on the algorithm provided by Daniel Rentz of OpenOffice.
+        """
+        if plaintext == "":
+            return 0
+
+        passwd_hash = 0x0000
+        for i, char in enumerate(plaintext):
+            c = ord(char) << (i + 1)
+            low_15 = c & 0x7fff
+            high_15 = c & 0x7fff << 15
+            high_15 = high_15 >> 15
+            c = low_15 | high_15
+            passwd_hash ^= c
+        passwd_hash ^= len(plaintext)
+        passwd_hash ^= 0xCE4B
+        return passwd_hash
+
+    def __init__(self, passwd = ""):
+        self._rec_data = pack('<H', self.passwd_hash(passwd))
+
+
+class Prot4RevRecord(BiffRecord):
+    _REC_ID = 0x01AF
+
+    def __init__(self):
+        self._rec_data = pack('<H', 0x00)
+
+
+class Prot4RevPassRecord(BiffRecord):
+    _REC_ID = 0x01BC
+
+    def __init__(self):
+        self._rec_data = pack('<H', 0x00)
+
+
+class BackupRecord(BiffRecord):
+    """
+    This  record  contains  a Boolean value determining whether Excel makes
+    a backup of the file while saving.
+    """
+    _REC_ID = 0x0040
+
+    def __init__(self, backup):
+        self._rec_data = pack('<H', backup)
+
+class HideObjRecord(BiffRecord):
+    """
+    This record specifies whether and how to show objects in the workbook.
+
+    Record HIDEOBJ, BIFF3-BIFF8:
+    Offset  Size    Contents
+    0       2       Viewing mode for objects:
+                        0 = Show all objects
+                        1 = Show placeholders
+                        2 = Do not show objects
+    """
+    _REC_ID = 0x008D
+
+    def __init__(self):
+        self._rec_data = pack('<H', 0x00)
+
+
+
+class RefreshAllRecord(BiffRecord):
+    """
+    """
+
+    _REC_ID = 0x01B7
+
+    def __init__(self):
+        self._rec_data = pack('<H', 0x00)
+
+
+class BookBoolRecord(BiffRecord):
+    """
+    This record contains a Boolean value determining whether to save values
+    linked  from external workbooks (CRN records and XCT records). In BIFF3
+    and BIFF4 this option is stored in the WSBOOL record.
+
+    Record BOOKBOOL, BIFF5-BIFF8:
+
+    Offset  Size    Contents
+    0       2       0 = Save external linked values;
+                    1 = Do not save external linked values
+    """
+
+    _REC_ID = 0x00DA
+
+    def __init__(self):
+        self._rec_data = pack('<H', 0x00)
+
+
+class CountryRecord(BiffRecord):
+    """
+    This   record   stores  two  Windows  country  identifiers.  The  first
+    represents  the  user  interface language of the Excel version that has
+    saved  the file, and the second represents the system regional settings
+    at the time the file was saved.
+
+    Record COUNTRY, BIFF3-BIFF8:
+
+    Offset  Size    Contents
+    0       2       Windows country identifier of the user interface language of Excel
+    2       2       Windows country identifier of the system regional settings
+
+    The  following  table  shows most of the used country identifiers. Most
+    of  these  identifiers  are  equal to the international country calling
+    codes.
+
+    1   USA
+    2   Canada
+    7   Russia
+    """
+
+    _REC_ID = 0x008C
+
+    def __init__(self, ui_id, sys_settings_id):
+        self._rec_data = pack('<2H', ui_id, sys_settings_id)
+
+
+class UseSelfsRecord(BiffRecord):
+    """
+    This  record  specifies if the formulas in the workbook can use natural
+    language  formulas.  This  type  of  formula can refer to cells by its
+    content or the content of the column or row header cell.
+
+    Record USESELFS, BIFF8:
+
+    Offset  Size    Contents
+    0       2       0 = Do not use natural language formulas
+                    1 = Use natural language formulas
+
+    """
+
+    _REC_ID = 0x0160
+
+    def __init__(self):
+        self._rec_data = pack('<H', 0x01)
+
+
+class EOFRecord(BiffRecord):
+    _REC_ID = 0x000A
+
+    def __init__(self):
+        self._rec_data = ''
+
+
+class DateModeRecord(BiffRecord):
+    """
+    This  record  specifies  the  base date for displaying date values. All
+    dates  are  stored as count of days past this base date. In BIFF2-BIFF4
+    this   record  is  part  of  the  Calculation  Settings  Block.
+    In BIFF5-BIFF8 it is stored in the Workbook Globals Substream.
+
+    Record DATEMODE, BIFF2-BIFF8:
+
+    Offset  Size    Contents
+    0       2       0 = Base is 1899-Dec-31 (the cell = 1 represents 1900-Jan-01)
+                    1 = Base is 1904-Jan-01 (the cell = 1 represents 1904-Jan-02)
+    """
+    _REC_ID = 0x0022
+
+    def __init__(self, from1904):
+        if from1904:
+            self._rec_data = pack('<H', 1)
+        else:
+            self._rec_data = pack('<H', 0)
+
+
+class PrecisionRecord(BiffRecord):
+    """
+    This record stores if formulas use the real cell values for calculation
+    or  the  values  displayed  on  the screen. In BIFF2- BIFF4 this record
+    is  part of the Calculation Settings Block. In BIFF5-BIFF8 it is stored
+    in the Workbook Globals Substream.
+
+    Record PRECISION, BIFF2-BIFF8:
+
+    Offset  Size    Contents
+    0       2       0 = Use displayed values;
+                    1 = Use real cell values
+    """
+    _REC_ID = 0x000E
+
+    def __init__(self, use_real_values):
+        if use_real_values:
+            self._rec_data = pack('<H', 1)
+        else:
+            self._rec_data = pack('<H', 0)
+
+
+class CodepageBiff8Record(BiffRecord):
+    """
+    This record stores the text encoding used to write byte strings, stored
+    as MS Windows code page identifier. The CODEPAGE record in BIFF8 always
+    contains  the  code  page  1200  (UTF-16).  Therefore  it is not
+    possible  to  obtain the encoding used for a protection password (it is
+    not UTF-16).
+
+    Record CODEPAGE, BIFF2-BIFF8:
+
+    Offset  Size    Contents
+    0       2       Code page identifier used for byte string text encoding:
+                      016FH = 367 = ASCII
+                      01B5H = 437 = IBM PC CP-437 (US)
+                      02D0H = 720 = IBM PC CP-720 (OEM Arabic)
+                      02E1H = 737 = IBM PC CP-737 (Greek)
+                      0307H = 775 = IBM PC CP-775 (Baltic)
+                      0352H = 850 = IBM PC CP-850 (Latin I)
+                      0354H = 852 = IBM PC CP-852 (Latin II (Central European))
+                      0357H = 855 = IBM PC CP-855 (Cyrillic)
+                      0359H = 857 = IBM PC CP-857 (Turkish)
+                      035AH = 858 = IBM PC CP-858 (Multilingual Latin I with Euro)
+                      035CH = 860 = IBM PC CP-860 (Portuguese)
+                      035DH = 861 = IBM PC CP-861 (Icelandic)
+                      035EH = 862 = IBM PC CP-862 (Hebrew)
+                      035FH = 863 = IBM PC CP-863 (Canadian (French))
+                      0360H = 864 = IBM PC CP-864 (Arabic)
+                      0361H = 865 = IBM PC CP-865 (Nordic)
+                      0362H = 866 = IBM PC CP-866 (Cyrillic (Russian))
+                      0365H = 869 = IBM PC CP-869 (Greek (Modern))
+                      036AH = 874 = Windows CP-874 (Thai)
+                      03A4H = 932 = Windows CP-932 (Japanese Shift-JIS)
+                      03A8H = 936 = Windows CP-936 (Chinese Simplified GBK)
+                      03B5H = 949 = Windows CP-949 (Korean (Wansung))
+                      03B6H = 950 = Windows CP-950 (Chinese Traditional BIG5)
+                      04B0H = 1200 = UTF-16 (BIFF8)
+                      04E2H = 1250 = Windows CP-1250 (Latin II) (Central European)
+                      04E3H = 1251 = Windows CP-1251 (Cyrillic)
+                      04E4H = 1252 = Windows CP-1252 (Latin I) (BIFF4-BIFF7)
+                      04E5H = 1253 = Windows CP-1253 (Greek)
+                      04E6H = 1254 = Windows CP-1254 (Turkish)
+                      04E7H = 1255 = Windows CP-1255 (Hebrew)
+                      04E8H = 1256 = Windows CP-1256 (Arabic)
+                      04E9H = 1257 = Windows CP-1257 (Baltic)
+                      04EAH = 1258 = Windows CP-1258 (Vietnamese)
+                      0551H = 1361 = Windows CP-1361 (Korean (Johab))
+                      2710H = 10000 = Apple Roman
+                      8000H = 32768 = Apple Roman
+                      8001H = 32769 = Windows CP-1252 (Latin I) (BIFF2-BIFF3)
+    """
+    _REC_ID = 0x0042
+    UTF_16 = 0x04B0
+
+    def __init__(self):
+        self._rec_data = pack('<H', self.UTF_16)
+
+class Window1Record(BiffRecord):
+    """
+    Offset Size Contents
+    0      2    Horizontal position of the document window (in twips = 1/20 of a point)
+    2      2    Vertical position of the document window (in twips = 1/20 of a point)
+    4      2    Width of the document window (in twips = 1/20 of a point)
+    6      2    Height of the document window (in twips = 1/20 of a point)
+    8      2    Option flags:
+                  Bits  Mask  Contents
+                  0     0001H 0 = Window is visible 1 = Window is hidden
+                  1     0002H 0 = Window is open 1 = Window is minimised
+                  3     0008H 0 = Horizontal scroll bar hidden 1 = Horizontal scroll bar visible
+                  4     0010H 0 = Vertical scroll bar hidden 1 = Vertical scroll bar visible
+                  5     0020H 0 = Worksheet tab bar hidden 1 = Worksheet tab bar visible
+    10     2    Index to active (displayed) worksheet
+    12     2    Index of first visible tab in the worksheet tab bar
+    14     2    Number of selected worksheets (highlighted in the worksheet tab bar)
+    16     2    Width of worksheet tab bar (in 1/1000 of window width). The remaining space is used by the
+                horizontal scrollbar.
+    """
+    _REC_ID = 0x003D
+    # flags
+
+    def __init__(self,
+                 hpos_twips, vpos_twips,
+                 width_twips, height_twips,
+                 flags,
+                 active_sheet,
+                 first_tab_index, selected_tabs, tab_width):
+        self._rec_data = pack('<9H', hpos_twips, vpos_twips,
+                                      width_twips, height_twips,
+                                      flags,
+                                      active_sheet,
+                                      first_tab_index, selected_tabs, tab_width)
+
+class FontRecord(BiffRecord):
+    """
+    WARNING
+        The font with index 4 is omitted in all BIFF versions.
+        This means the first four fonts have zero-based indexes, and
+        the fifth font and all following fonts are referenced with one-based
+        indexes.
+
+    Offset Size Contents
+    0      2    Height of the font (in twips = 1/20 of a point)
+    2      2    Option flags:
+                  Bit Mask    Contents
+                  0   0001H   1 = Characters are bold (redundant, see below)
+                  1   0002H   1 = Characters are italic
+                  2   0004H   1 = Characters are underlined (redundant, see below)
+                  3   0008H   1 = Characters are struck out
+                        0010H 1 = Outline
+                        0020H  1 = Shadow
+    4     2     Colour index
+    6     2     Font weight (100-1000).
+                Standard values are 0190H (400) for normal text and 02BCH
+                (700) for bold text.
+    8     2     Escapement type:
+                  0000H = None
+                  0001H = Superscript
+                  0002H = Subscript
+    10    1     Underline type:
+                  00H = None
+                  01H = Single
+                  21H = Single accounting
+                  02H = Double
+                  22H = Double accounting
+    11    1     Font family:
+                  00H = None (unknown or don't care)
+                  01H = Roman (variable width, serifed)
+                  02H = Swiss (variable width, sans-serifed)
+                  03H = Modern (fixed width, serifed or sans-serifed)
+                  04H = Script (cursive)
+                  05H = Decorative (specialised, i.e. Old English, Fraktur)
+    12    1     Character set:
+                  00H = 0 = ANSI Latin
+                  01H = 1 = System default
+                  02H = 2 = Symbol
+                  4DH = 77 = Apple Roman
+                  80H = 128 = ANSI Japanese Shift-JIS
+                  81H = 129 = ANSI Korean (Hangul)
+                  82H = 130 = ANSI Korean (Johab)
+                  86H = 134 = ANSI Chinese Simplified GBK
+                  88H = 136 = ANSI Chinese Traditional BIG5
+                  A1H = 161 = ANSI Greek
+                  A2H = 162 = ANSI Turkish
+                  A3H = 163 = ANSI Vietnamese
+                  B1H = 177 = ANSI Hebrew
+                  B2H = 178 = ANSI Arabic
+                  BAH = 186 = ANSI Baltic
+                  CCH = 204 = ANSI Cyrillic
+                  DEH = 222 = ANSI Thai
+                  EEH = 238 = ANSI Latin II (Central European)
+                  FFH = 255 = OEM Latin I
+    13    1     Not used
+    14    var.  Font name:
+                  BIFF5/BIFF7: Byte string, 8-bit string length
+                  BIFF8: Unicode string, 8-bit string length
+    The boldness and underline flags are still set in the options field,
+    but not used on reading the font. Font weight and underline type
+    are specified in separate fields instead.
+    """
+    _REC_ID = 0x0031
+
+    def __init__(self,
+                    height, options, colour_index, weight, escapement,
+                    underline, family, charset,
+                    name):
+        uname = upack1(name)
+        uname_len = len(uname)
+
+        self._rec_data = pack('<5H4B%ds' % uname_len, height, options, colour_index, weight, escapement,
+                                                underline, family, charset, 0x00,
+                                                uname)
+
+class NumberFormatRecord(BiffRecord):
+    """
+    Record FORMAT, BIFF8:
+    Offset  Size    Contents
+    0       2       Format index used in other records
+    2       var.    Number format string (Unicode string, 16-bit string length)
+
+    From  BIFF5  on,  the built-in number formats will be omitted. The built-in
+    formats  are  dependent  on  the current regional settings of the operating
+    system.  The following table shows which number formats are used by default
+    in  a  US-English  environment.  All indexes from 0 to 163 are reserved for
+    built-in formats. The first user-defined format starts at 164.
+
+    The built-in number formats, BIFF5-BIFF8
+
+    Index   Type        Format string
+    0       General     General
+    1       Decimal     0
+    2       Decimal     0.00
+    3       Decimal     #,##0
+    4       Decimal     #,##0.00
+    5       Currency    "$"#,##0_);("$"#,##
+    6       Currency    "$"#,##0_);[Red]("$"#,##
+    7       Currency    "$"#,##0.00_);("$"#,##
+    8       Currency    "$"#,##0.00_);[Red]("$"#,##
+    9       Percent     0%
+    10      Percent     0.00%
+    11      Scientific  0.00E+00
+    12      Fraction    # ?/?
+    13      Fraction    # ??/??
+    14      Date        M/D/YY
+    15      Date        D-MMM-YY
+    16      Date        D-MMM
+    17      Date        MMM-YY
+    18      Time        h:mm AM/PM
+    19      Time        h:mm:ss AM/PM
+    20      Time        h:mm
+    21      Time        h:mm:ss
+    22      Date/Time   M/D/YY h:mm
+    37      Account     _(#,##0_);(#,##0)
+    38      Account     _(#,##0_);[Red](#,##0)
+    39      Account     _(#,##0.00_);(#,##0.00)
+    40      Account     _(#,##0.00_);[Red](#,##0.00)
+    41      Currency    _("$"* #,##0_);_("$"* (#,##0);_("$"* "-"_);_(@_)
+    42      Currency    _(* #,##0_);_(* (#,##0);_(* "-"_);_(@_)
+    43      Currency    _("$"* #,##0.00_);_("$"* (#,##0.00);_("$"* "-"??_);_(@_)
+    44      Currency    _(* #,##0.00_);_(* (#,##0.00);_(* "-"??_);_(@_)
+    45      Time        mm:ss
+    46      Time        [h]:mm:ss
+    47      Time        mm:ss.0
+    48      Scientific  ##0.0E+0
+    49      Text        @
+    """
+    _REC_ID = 0x041E
+
+    def __init__(self, idx, fmtstr):
+        ufmtstr = upack2(fmtstr)
+        ufmtstr_len = len(ufmtstr)
+
+        self._rec_data = pack('<H%ds' % ufmtstr_len, idx, ufmtstr)
+
+
+class XFRecord(BiffRecord):
+    """
+    XF Substructures
+    -------------------------------------------------------------------------
+    XF_TYPE_PROT  XF Type and Cell Protection (3 Bits), BIFF3-BIFF8
+    These 3 bits are part of a specific data byte.
+    Bit Mask    Contents
+    0   01H     1 = Cell is locked
+    1   02H     1 = Formula is hidden
+    2   04H     0 = Cell XF; 1 = Style XF
+
+    XF_USED_ATTRIB   Attributes   Used  from  Parent  Style  XF  (6  Bits),
+    BIFF3-BIFF8  Each  bit  describes  the  validity  of  a  specific group
+    of  attributes.  In  cell XFs a cleared bit means the attributes of the
+    parent  style XF are used (but only if the attributes are valid there),
+    a  set  bit  means  the  attributes  of  this XF are used. In style XFs
+    a cleared bit means the attribute setting is valid, a set bit means the
+    attribute should be ignored.
+    Bit Mask    Contents
+    0   01H     Flag for number format
+    1   02H     Flag for font
+    2   04H     Flag for horizontal and vertical alignment, text wrap, indentation, orientation, rotation, and
+                text direction
+    3   08H     Flag for border lines
+    4   10H     Flag for background area style
+    5   20H     Flag for cell protection (cell locked and formula hidden)
+
+    XF_HOR_ALIGN  Horizontal Alignment (3 Bits), BIFF2-BIFF8 The horizontal
+    alignment consists of 3 bits and is part of a specific data byte.
+    Value   Horizontal alignment
+    00H     General
+    01H     Left
+    02H     Centred
+    03H     Right
+    04H     Filled
+    05H     Justified (BIFF4-BIFF8X)
+    06H     Centred across selection (BIFF4-BIFF8X)
+    07H     Distributed (BIFF8X)
+
+    XF_VERT_ALIGN Vertical Alignment (2 or 3 Bits), BIFF4-BIFF8
+    The vertical alignment consists of 2 bits (BIFF4) or 3 bits (BIFF5-BIFF8)
+    and is part of a specific data byte. Vertical alignment is not available
+    in BIFF2 and BIFF3.
+    Value   Vertical alignment
+    00H     Top
+    01H     Centred
+    02H     Bottom
+    03H     Justified (BIFF5-BIFF8X)
+    04H     Distributed (BIFF8X)
+
+    XF_ORIENTATION  Text  Orientation  (2  Bits),  BIFF4-BIFF7  In the BIFF
+    versions  BIFF4-BIFF7,  text  can  be  rotated  in  steps of 90 degrees
+    or  stacked.  The  orientation  mode  consists of 2 bits and is part of
+    a specific data byte. In BIFF8 a rotation angle occurs instead of these
+    flags.
+    Value   Text orientation
+    00H     Not rotated
+    01H     Letters are stacked top-to-bottom, but not rotated
+    02H     Text is rotated 90 degrees counterclockwise
+    03H     Text is rotated 90 degrees clockwise
+
+    XF_ROTATION Text Rotation Angle (1 Byte), BIFF8
+    Value   Text rotation
+    0       Not rotated
+    1-90    1 to 90 degrees counterclockwise
+    91-180  1 to 90 degrees clockwise
+    255     Letters are stacked top-to-bottom, but not rotated
+
+    XF_BORDER_34  Cell  Border  Style  (4  Bytes), BIFF3-BIFF4 Cell borders
+    contain a line style and a line colour for each line of the border.
+    Bit     Mask        Contents
+    2-0     00000007H   Top line style
+    7-3     000000F8H   Colour index for top line colour
+    10-8    00000700H   Left line style
+    15-11   0000F800H   Colour index for left line colour
+    18-16   00070000H   Bottom line style
+    23-19   00F80000H   Colour index for bottom line colour
+    26-24   07000000H   Right line style
+    31-27   F8000000H   Colour index for right line colour
+
+    XF_AREA_34  Cell  Background  Area  Style (2 Bytes), BIFF3-BIFF4 A cell
+    background  area  style  contains  an area pattern and a foreground and
+    background colour.
+    Bit     Mask    Contents
+    5-0     003FH   Fill pattern
+    10-6    07C0H   Colour index for pattern colour
+    15-11   F800H   Colour index for pattern background
+ ---------------------------------------------------------------------------------------------
+    Record XF, BIFF8:
+    Offset      Size    Contents
+    0           2       Index to FONT record
+    2           2       Index to FORMAT record
+    4           2       Bit     Mask    Contents
+                        2-0     0007H   XF_TYPE_PROT . XF type, cell protection (see above)
+                        15-4    FFF0H   Index to parent style XF (always FFFH in style XFs)
+    6           1       Bit     Mask    Contents
+                        2-0     07H     XF_HOR_ALIGN . Horizontal alignment (see above)
+                        3       08H     1 = Text is wrapped at right border
+                        6-4     70H     XF_VERT_ALIGN . Vertical alignment (see above)
+    7           1       XF_ROTATION: Text rotation angle (see above)
+    8           1       Bit     Mask    Contents
+                        3-0     0FH     Indent level
+                        4       10H     1 = Shrink content to fit into cell
+                        5               merge
+                        7-6     C0H     Text direction (BIFF8X only)
+                                        00b = According to context
+                                        01b = Left-to-right
+                                        10b = Right-to-left
+    9           1       Bit     Mask    Contents
+                        7-2     FCH     XF_USED_ATTRIB . Used attributes (see above)
+    10          4       Cell border lines and background area:
+                        Bit     Mask      Contents
+                        3-0     0000000FH Left line style
+                        7-4     000000F0H Right line style
+                        11-8    00000F00H Top line style
+                        15-12   0000F000H Bottom line style
+                        22-16   007F0000H Colour index for left line colour
+                        29-23   3F800000H Colour index for right line colour
+                        30      40000000H 1 = Diagonal line from top left to right bottom
+                        31      80000000H 1 = Diagonal line from bottom left to right top
+    14          4       Bit     Mask      Contents
+                        6-0     0000007FH Colour index for top line colour
+                        13-7    00003F80H Colour index for bottom line colour
+                        20-14   001FC000H Colour index for diagonal line colour
+                        24-21   01E00000H Diagonal line style
+                        31-26   FC000000H Fill pattern
+    18          2       Bit     Mask    Contents
+                        6-0     007FH   Colour index for pattern colour
+                        13-7    3F80H   Colour index for pattern background
+
+    """
+    _REC_ID = 0x00E0
+
+    def __init__(self, xf, xftype='cell'):
+        font_xf_idx, fmt_str_xf_idx, alignment, borders, pattern, protection = xf
+        fnt = pack('<H', font_xf_idx)
+        fmt = pack('<H', fmt_str_xf_idx)
+        if xftype == 'cell':
+            prt = pack('<H',
+                ((protection.cell_locked    & 0x01) << 0) |
+                ((protection.formula_hidden & 0x01) << 1)
+            )
+        else:
+            prt = pack('<H', 0xFFF5)
+        aln = pack('B',
+            ((alignment.horz & 0x07) << 0) |
+            ((alignment.wrap & 0x01) << 3) |
+            ((alignment.vert & 0x07) << 4)
+        )
+        rot = pack('B', alignment.rota)
+        txt = pack('B',
+            ((alignment.inde & 0x0F) << 0) |
+            ((alignment.shri & 0x01) << 4) |
+            ((alignment.merg & 0x01) << 5) |
+            ((alignment.dire & 0x03) << 6)
+        )
+        if xftype == 'cell':
+            used_attr = pack('B', 0xF8)
+        else:
+            used_attr = pack('B', 0xF4)
+
+        if borders.left == borders.NO_LINE:
+            borders.left_colour = 0x00
+        if borders.right == borders.NO_LINE:
+            borders.right_colour = 0x00
+        if borders.top == borders.NO_LINE:
+            borders.top_colour = 0x00
+        if borders.bottom == borders.NO_LINE:
+            borders.bottom_colour = 0x00
+        if borders.diag == borders.NO_LINE:
+            borders.diag_colour = 0x00
+        brd1 = pack('<L',
+            ((borders.left          & 0x0F) << 0 ) |
+            ((borders.right         & 0x0F) << 4 ) |
+            ((borders.top           & 0x0F) << 8 ) |
+            ((borders.bottom        & 0x0F) << 12) |
+            ((borders.left_colour   & 0x7F) << 16) |
+            ((borders.right_colour  & 0x7F) << 23) |
+            ((borders.need_diag1    & 0x01) << 30) |
+            ((borders.need_diag2    & 0x01) << 31)
+        )
+        brd2 = pack('<L',
+            ((borders.top_colour    & 0x7F) << 0 ) |
+            ((borders.bottom_colour & 0x7F) << 7 ) |
+            ((borders.diag_colour   & 0x7F) << 14) |
+            ((borders.diag          & 0x0F) << 21) |
+            ((pattern.pattern       & 0x3F) << 26)
+        )
+        pat = pack('<H',
+            ((pattern.pattern_fore_colour & 0x7F) << 0 ) |
+            ((pattern.pattern_back_colour & 0x7F) << 7 )
+        )
+        self._rec_data = fnt + fmt + prt + \
+                        aln + rot + txt + used_attr + \
+                        brd1 + brd2 + \
+                        pat
+
+class StyleRecord(BiffRecord):
+    """
+    STYLE record for user-defined cell styles, BIFF3-BIFF8:
+    Offset  Size    Contents
+    0       2       Bit     Mask    Contents
+                    11-0    0FFFH   Index to style XF record
+                    15      8000H   Always 0 for user-defined styles
+    2       var.    BIFF2-BIFF7: Non-empty byte string, 8-bit string length
+                    BIFF8: Non-empty Unicode string, 16-bit string length
+    STYLE record for built-in cell styles, BIFF3-BIFF8:
+    Offset  Size    Contents
+    0       2       Bit     Mask    Contents
+                    11-0    0FFFH   Index to style XF record
+                    15      8000H   Always 1 for built-in styles
+    2       1       Identifier of the built-in cell style:
+                        00H = Normal
+                        01H = RowLevel_lv (see next field)
+                        02H = ColLevel_lv (see next field)
+                        03H = Comma
+                        04H = Currency
+                        05H = Percent
+                        06H = Comma [0] (BIFF4-BIFF8)
+                        07H = Currency [0] (BIFF4-BIFF8)
+                        08H = Hyperlink (BIFF8)
+                        09H = Followed Hyperlink (BIFF8)
+    3       1       Level for RowLevel or ColLevel style
+                    (zero-based, lv), FFH otherwise
+    The  RowLevel  and  ColLevel  styles specify the formatting of subtotal
+    cells  in  a specific outline level. The level is specified by the last
+    field  in the STYLE record. Valid values are 0-6 for the outline levels
+    1-7.
+    """
+    _REC_ID = 0x0293
+
+    def __init__(self):
+        self._rec_data = pack('<HBB', 0x8000, 0x00, 0xFF)
+        # TODO: implement user-defined styles???
+
+
+class PaletteRecord(BiffRecord):
+    """
+    This  record  contains  the  definition  of  all  user-defined  colours
+    available for cell and object formatting.
+
+    Record PALETTE, BIFF3-BIFF8:
+
+    Offset  Size    Contents
+    0       2       Number of following colours (nm). Contains 16 in BIFF3-BIFF4 and 56 in BIFF5-BIFF8.
+    2       4*nm    List of nm RGB colours
+
+    The following table shows how colour indexes are used in other records:
+
+    Colour index    Resulting colour or internal list index
+    00H             Built-in Black (R = 00H, G = 00H, B = 00H)
+    01H             Built-in White (R = FFH, G = FFH, B = FFH)
+    02H             Built-in Red (R = FFH, G = 00H, B = 00H)
+    03H             Built-in Green (R = 00H, G = FFH, B = 00H)
+    04H             Built-in Blue (R = 00H, G = 00H, B = FFH)
+    05H             Built-in Yellow (R = FFH, G = FFH, B = 00H)
+    06H             Built-in Magenta (R = FFH, G = 00H, B = FFH)
+    07H             Built-in Cyan (R = 00H, G = FFH, B = FFH)
+    08H             First user-defined colour from the PALETTE record (entry 0 from record colour list)
+    .........................
+
+    17H (BIFF3-BIFF4) Last user-defined colour from the PALETTE record (entry 15 or 55 from record colour list)
+    3FH (BIFF5-BIFF8)
+
+    18H (BIFF3-BIFF4) System window text colour for border lines (used in records XF, CF, and
+    40H (BIFF5-BIFF8) WINDOW2 (BIFF8 only))
+
+    19H (BIFF3-BIFF4) System window background colour for pattern background (used in records XF, and CF)
+    41H (BIFF5-BIFF8)
+
+    43H             System face colour (dialogue background colour)
+    4DH             System window text colour for chart border lines
+    4EH             System window background colour for chart areas
+    4FH             Automatic colour for chart border lines (seems to be always Black)
+    50H             System ToolTip background colour (used in note objects)
+    51H             System ToolTip text colour (used in note objects)
+    7FFFH           System window text colour for fonts (used in records FONT, EFONT, and CF)
+
+    """
+    _REC_ID = 0x0092
+
+
+class BoundSheetRecord(BiffRecord):
+    """
+    This  record  is  located  in  the workbook globals area and represents
+    a  sheet  inside  of  the  workbook. For each sheet a BOUNDSHEET record
+    is  written.  It  stores  the sheet name and a stream offset to the BOF
+    record    within   the   workbook   stream.  The  record  is also known
+    as BUNDLESHEET.
+
+    Record BOUNDSHEET, BIFF5-BIFF8:
+    Offset  Size    Contents
+    0       4       Absolute stream position of the BOF record of the sheet represented by this record. This
+                    field is never encrypted in protected files.
+    4       1       Visibility:
+                        00H = Visible
+                        01H = Hidden
+                        02H = Strong hidden
+    5       1       Sheet type:
+                        00H = Worksheet
+                        02H = Chart
+                        06H = Visual Basic module
+    6       var.    Sheet name:
+                        BIFF5/BIFF7: Byte string, 8-bit string length
+                        BIFF8: Unicode string, 8-bit string length
+    """
+    _REC_ID = 0x0085
+
+    def __init__(self, stream_pos, visibility, sheetname, encoding='ascii'):
+        usheetname = upack1(sheetname, encoding)
+        uusheetname_len = len(usheetname)
+
+        self._rec_data = pack('<LBB%ds' % uusheetname_len, stream_pos, visibility, 0x00, usheetname)
+
+
+class ContinueRecord(BiffRecord):
+    """
+    Whenever  the content of a record exceeds the given limits (see table),
+    the  record  must  be  split.  Several  CONTINUE records containing the
+    additional data are added after the parent record.
+
+    BIFF version    Maximum data size of a record
+    BIFF2-BIFF7     2080 bytes (2084 bytes including record header)
+    BIFF8           8224 bytes (8228 bytes including record header) (0x2020)
+
+    Record CONTINUE, BIFF2-BIFF8:
+    Offset  Size    Contents
+    0       var.    Data continuation of the previous record
+
+    Unicode  strings  are  split in a special way. At the beginning of each
+    CONTINUE  record  the option flags byte is repeated. Only the character
+    size  flag  will  be set in this flags byte, the Rich-Text flag and the
+    Far-East  flag  are set to zero. In each CONTINUE record it is possible
+    that  the  character  size  changes  from  8-bit  characters  to 16-bit
+    characters and vice versa.
+
+    Never  a  Unicode  string  is  split  until  and  including  the  first
+    character.  That means, all header fields (string length, option flags,
+    optional Rich-Text size, and optional Far-East data size) and the first
+    character  of  the string have to occur together in the leading record,
+    or  have  to  be  moved completely into the CONTINUE record. Formatting
+    runs cannot be split between their components (character index and FONT
+    record  index).  If  a string is split between two formatting runs, the
+    option flags field will not be repeated in the CONTINUE record.
+    """
+    _REC_ID = 0x003C
+
+
+class SSTRecord(BiffRecord):
+    """
+    This  record  contains  a  list  of  all  strings  used anywhere in the
+    workbook.  Each string occurs only once. The workbook uses indexes into
+    the list to reference the strings.
+
+    Record SST, BIFF8:
+    Offset  Size    Contents
+    0       4       Total number of strings in the workbook (see below)
+    4       4       Number of following strings (nm)
+    8       var.    List of nm Unicode strings, 16-bit string length
+
+    The  first  field  of  the  SST  record  counts  the  total  occurrence
+    of  strings  in  the  workbook.  For  instance,  the string AAA is used
+    3  times  and  the string BBB is used 2 times. The first field contains
+    5 and the second field contains 2, followed by the two strings.
+    """
+    _REC_ID = 0x00FC
+
+
+class ExtSSTRecord(BiffRecord):
+    """
+    This  record  occurs  in  conjunction  with  the SST record. It is used
+    by  Excel  to create a hash table with stream offsets to the SST record
+    to optimise string search operations. Excel may not shorten this record
+    if  strings  are deleted from the shared string table, so the last part
+    might  contain  invalid  data. The stream indexes in this record divide
+    the SST into portions containing a constant number of strings.
+
+    Record EXTSST, BIFF8:
+
+    Offset  Size    Contents
+    0       2       Number of strings in a portion, this number is >=8
+    2       var.    List of OFFSET structures for all portions. Each OFFSET contains the following data:
+                        Offset Size Contents
+                        0       4   Absolute stream position of first string of the portion
+                        4       2   Position of first string of the portion inside of current record,
+                                    including record header. This counter restarts at zero, if the SST
+                                    record is continued with a CONTINUE record.
+                        6       2   Not used
+    """
+    _REC_ID = 0x00FF
+
+    def __init__(self, sst_stream_pos, str_placement, portions_len):
+        extsst = {}
+        abs_stream_pos = sst_stream_pos
+        str_counter = 0
+        portion_counter = 0
+        while str_counter < len(str_placement):
+            str_chunk_num, pos_in_chunk = str_placement[str_counter]
+            if str_chunk_num <> portion_counter:
+                portion_counter = str_chunk_num
+                abs_stream_pos += portions_len[portion_counter-1]
+                #print hex(abs_stream_pos)
+            str_stream_pos = abs_stream_pos + pos_in_chunk + 4 # header
+            extsst[str_counter] = (pos_in_chunk, str_stream_pos)
+            str_counter += 1
+
+        exsst_str_count_delta = max(8, len(str_placement)*8/0x2000) # maybe smth else?
+        self._rec_data = pack('<H', exsst_str_count_delta)
+        str_counter = 0
+        while str_counter < len(str_placement):
+            self._rec_data += pack('<IHH', extsst[str_counter][1], extsst[str_counter][0], 0)
+            str_counter += exsst_str_count_delta
+
+class DimensionsRecord(BiffRecord):
+    """
+    Record DIMENSIONS, BIFF8:
+
+    Offset  Size    Contents
+    0       4       Index to first used row
+    4       4       Index to last used row, increased by 1
+    8       2       Index to first used column
+    10      2       Index to last used column, increased by 1
+    12      2       Not used
+    """
+    _REC_ID = 0x0200
+    def __init__(self, first_used_row, last_used_row, first_used_col, last_used_col):
+        if first_used_row > last_used_row or first_used_col > last_used_col:
+            # Special case: empty worksheet
+            first_used_row = first_used_col = 0
+            last_used_row = last_used_col = -1
+        self._rec_data = pack('<2L3H',
+            first_used_row, last_used_row + 1,
+            first_used_col, last_used_col + 1,
+            0x00)
+
+
+class Window2Record(BiffRecord):
+    """
+    Record WINDOW2, BIFF8:
+
+    Offset  Size Contents
+    0       2 Option flags (see below)
+    2       2 Index to first visible row
+    4       2 Index to first visible column
+    6       2 Colour index of grid line colour. Note that in BIFF2-BIFF7 an RGB colour is
+                written instead.
+    8       2 Not used
+    10      2 Cached magnification factor in page break preview (in percent); 0 = Default (60%)
+    12      2 Cached magnification factor in normal view (in percent); 0 = Default (100%)
+    14      4 Not used
+
+    In  BIFF8  this record stores used magnification factors for page break
+    preview  and  normal  view.  These  values  are  used  to  restore  the
+    magnification,  when the view is changed. The real magnification of the
+    currently  active  view  is  stored  in the SCL record. The type of the
+    active view is stored in the option flags field (see below).
+
+     0 0001H 0 = Show formula results 1 = Show formulas
+     1 0002H 0 = Do not show grid lines 1 = Show grid lines
+     2 0004H 0 = Do not show sheet headers 1 = Show sheet headers
+     3 0008H 0 = Panes are not frozen 1 = Panes are frozen (freeze)
+     4 0010H 0 = Show zero values as empty cells 1 = Show zero values
+     5 0020H 0 = Manual grid line colour 1 = Automatic grid line colour
+     6 0040H 0 = Columns from left to right 1 = Columns from right to left
+     7 0080H 0 = Do not show outline symbols 1 = Show outline symbols
+     8 0100H 0 = Keep splits if pane freeze is removed 1 = Remove splits if pane freeze is removed
+     9 0200H 0 = Sheet not selected 1 = Sheet selected (BIFF5-BIFF8)
+    10 0400H 0 = Sheet not visible 1 = Sheet visible (BIFF5-BIFF8)
+    11 0800H 0 = Show in normal view 1 = Show in page break preview (BIFF8)
+
+    The freeze flag specifies, if a following PANE record describes unfrozen or frozen panes.
+
+    *** This class appends the optional SCL record ***
+
+    Record SCL, BIFF4-BIFF8:
+
+    This record stores the magnification of the active view of the current worksheet.
+    In BIFF8 this can be either the normal view or the page break preview.
+    This is determined in the WINDOW2 record. The SCL record is part of the
+    Sheet View Settings Block.
+
+    Offset  Size    Contents
+    0       2       Numerator of the view magnification fraction (num)
+    2       2       Denumerator [denominator] of the view magnification fraction (den)
+    The magnification is stored as reduced fraction. The magnification results from num/den.
+
+    SJM note: Excel expresses (e.g.) 25% in reduced form i.e. 1/4. Reason unknown. This code
+    writes 25/100, and Excel is happy with that.
+
+    """
+    _REC_ID = 0x023E
+
+    def __init__(self, options, first_visible_row, first_visible_col,
+        grid_colour, preview_magn, normal_magn, scl_magn):
+        self._rec_data = pack('<7HL', options,
+                                    first_visible_row, first_visible_col,
+                                    grid_colour,
+                                    0x00,
+                                    preview_magn, normal_magn,
+                                    0x00L)
+        if scl_magn:
+            self._scl_rec = pack('<4H', 0x00A0, 4, scl_magn, 100)
+        else:
+            self._scl_rec = ''
+
+    def get(self):
+        return self.get_rec_header() + self._rec_data + self._scl_rec
+
+
+class PanesRecord(BiffRecord):
+    """
+    This record stores the position of window panes. It is part of the Sheet
+    View Settings Block. If the sheet does not contain any splits, this
+    record will not occur.
+    A sheet can be split in two different ways, with unfrozen panes or with
+    frozen panes. A flag in the WINDOW2 record specifies, if the panes are
+    frozen, which affects the contents of this record.
+
+    Record PANE, BIFF2-BIFF8:
+    Offset      Size        Contents
+    0           2           Position of the vertical split
+                            (px, 0 = No vertical split):
+                            Unfrozen pane: Width of the left pane(s)
+                            (in twips = 1/20 of a point)
+                            Frozen pane: Number of visible
+                            columns in left pane(s)
+    2           2           Position of the horizontal split
+                            (py, 0 = No horizontal split):
+                            Unfrozen pane: Height of the top pane(s)
+                            (in twips = 1/20 of a point)
+                            Frozen pane: Number of visible
+                            rows in top pane(s)
+    4           2           Index to first visible row
+                            in bottom pane(s)
+    6           2           Index to first visible column
+                            in right pane(s)
+    8           1           Identifier of pane with active
+                            cell cursor
+    [9]         1           Not used (BIFF5-BIFF8 only, not written
+                            in BIFF2-BIFF4)
+
+    If the panes are frozen, pane 0 is always active, regardless
+    of the cursor position. The correct identifiers for all possible
+    combinations of visible panes are shown in the following pictures.
+
+    px = 0, py = 0                  px = 0, py > 0
+    --------------------------      ------------|-------------
+    |                        |      |                        |
+    |                        |      |           3            |
+    |                        |      |                        |
+    -           3            -      --------------------------
+    |                        |      |                        |
+    |                        |      |           2            |
+    |                        |      |                        |
+    --------------------------      ------------|-------------
+
+    px > 0, py = 0                  px > 0, py > 0
+    ------------|-------------      ------------|-------------
+    |           |            |      |           |            |
+    |           |            |      |     3     |      2     |
+    |           |            |      |           |            |
+    -     3     |      1     -      --------------------------
+    |           |            |      |           |            |
+    |           |            |      |     1     |      0     |
+    |           |            |      |           |            |
+    ------------|-------------      ------------|-------------
+    """
+    _REC_ID = 0x0041
+    def __init__(self, px, py, first_row_bottom, first_col_right, active_pane):
+        self._rec_data = pack('<5H',
+                                            px, py,
+                                            first_row_bottom, first_col_right,
+                                            active_pane)
+
+
+class RowRecord(BiffRecord):
+    """
+    This  record  contains  the properties of a single row in a sheet. Rows
+    and cells in a sheet are divided into blocks of 32 rows.
+
+    Record ROW, BIFF3-BIFF8:
+
+    Offset  Size    Contents
+    0       2       Index of this row
+    2       2       Index to column of the first cell which is described by a cell record
+    4       2       Index to column of the last cell which is described by a cell record,
+                    increased by 1
+    6       2       Bit     Mask    Contents
+                    14-0    7FFFH   Height of the row, in twips = 1/20 of a point
+                    15      8000H   0 = Row has custom height; 1 = Row has default height
+    8       2       Not used
+    10      2       In BIFF3-BIFF4 this field contains a relative offset
+                    to calculate stream position of the first cell record
+                    for this row. In BIFF5-BIFF8 this field is not used
+                    anymore, but the DBCELL record instead.
+    12      4       Option flags and default row formatting:
+                    Bit     Mask        Contents
+                    2-0     00000007H   Outline level of the row
+                    4       00000010H   1 = Outline group starts or ends here (depending
+                                        on where the outline buttons are located,
+                                        see WSBOOL record), and is collapsed
+                    5       00000020H   1 = Row is hidden (manually, or by a filter or outline group)
+                    6       00000040H   1 = Row height and default font height do not match
+                    7       00000080H   1 = Row has explicit default format (fl)
+                    8       00000100H   Always 1
+                    27-16   0FFF0000H   If fl=1: Index to default XF record
+                    28      10000000H   1 = Additional space above the row. This flag is set,
+                                        if the upper border of at least one cell in this row
+                                        or if the lower border of at least one cell in the row
+                                        above is formatted with a thick line style.
+                                        Thin and medium line styles are not taken into account.
+                    29      20000000H   1 = Additional space below the row. This flag is set,
+                                        if the lower border of at least one cell in this row
+                                        or if the upper border of at least one cell in the row
+                                        below is formatted with a medium or thick line style.
+                                        Thin line styles are not taken into account.
+    """
+
+    _REC_ID = 0x0208
+
+    def __init__(self, index, first_col, last_col, height_options, options):
+        self._rec_data = pack('<6HL', index, first_col, last_col + 1,
+                                        height_options,
+                                        0x00, 0x00,
+                                        options)
+
+class LabelSSTRecord(BiffRecord):
+    """
+    This record represents a cell that contains a string. It replaces the
+    LABEL record and RSTRING record used in BIFF2-BIFF7.
+    """
+    _REC_ID = 0x00FD
+
+    def __init__(self, row, col, xf_idx, sst_idx):
+        self._rec_data = pack('<3HL', row, col, xf_idx, sst_idx)
+
+
+class MergedCellsRecord(BiffRecord):
+    """
+    This record contains all merged cell ranges of the current sheet.
+
+    Record MERGEDCELLS, BIFF8:
+
+    Offset  Size    Contents
+    0       var.    Cell range address list with all merged ranges
+
+    ------------------------------------------------------------------
+
+    A cell range address list consists of a field with the number of ranges
+    and the list of the range addresses.
+
+    Cell range address list, BIFF8:
+
+    Offset  Size            Contents
+    0       2               Number of following cell range addresses (nm)
+    2       8*nm            List of nm cell range addresses
+
+    ---------------------------------------------------------------------
+    Cell range address, BIFF8:
+
+    Offset  Size    Contents
+    0       2       Index to first row
+    2       2       Index to last row
+    4       2       Index to first column
+    6       2       Index to last column
+
+    """
+    _REC_ID = 0x00E5
+
+    def __init__(self, merged_list):
+        i = len(merged_list) - 1
+        while i >= 0:
+            j = 0
+            merged = ''
+            while (i >= 0) and (j < 0x403):
+                r1, r2, c1, c2 = merged_list[i]
+                merged += pack('<4H', r1, r2, c1, c2)
+                i -= 1
+                j += 1
+            self._rec_data += pack('<3H', self._REC_ID, len(merged) + 2, j) + \
+                                    merged
+
+    # for some reason Excel doesn't use CONTINUE
+    def get(self):
+        return self._rec_data
+
+class MulBlankRecord(BiffRecord):
+    """
+    This  record  represents  a  cell  range  of empty cells. All cells are
+    located in the same row.
+
+    Record MULBLANK, BIFF5-BIFF8:
+
+    Offset  Size    Contents
+    0       2       Index to row
+    2       2       Index to first column (fc)
+    4       2*nc    List of nc=lc-fc+1 16-bit indexes to XF records
+    4+2*nc  2       Index to last column (lc)
+    """
+    _REC_ID = 0x00BE
+
+    def __init__(self, row, first_col, last_col, xf_index):
+        blanks_count = last_col-first_col+1
+        self._rec_data = pack('%dH' % blanks_count, *([xf_index]*blanks_count))
+        self._rec_data = pack('<2H', row, first_col) +  self._rec_data + pack('<H',  last_col)
+
+
+class BlankRecord(BiffRecord):
+    """
+    This  record  represents  an empty cell.
+
+    Record BLANK, BIFF5-BIFF8:
+
+    Offset  Size    Contents
+    0       2       Index to row
+    2       2       Index to first column (fc)
+    4       2       indexes to XF record
+    """
+    _REC_ID = 0x0201
+
+    def __init__(self, row, col, xf_index):
+        self._rec_data = pack('<3H', row, col, xf_index)
+
+
+class RKRecord(BiffRecord):
+    """
+    This record represents a cell that contains an RK value (encoded integer or
+    floating-point value). If a floating-point value cannot be encoded to an RK value,
+    a NUMBER record will be written.
+    """
+    _REC_ID = 0x027E
+
+    def __init__(self, row, col, xf_index, rk_encoded):
+        self._rec_data = pack('<3Hi', row, col, xf_index, rk_encoded)
+
+
+class NumberRecord(BiffRecord):
+    """
+    This record represents a cell that contains an IEEE-754 floating-point value.
+    """
+    _REC_ID = 0x0203
+
+    def __init__(self, row, col, xf_index, number):
+        self._rec_data = pack('<3Hd', row, col, xf_index, number)
+
+class BoolErrRecord(BiffRecord):
+    """
+    This record represents a cell that contains a boolean or error value.
+    """
+    _REC_ID = 0x0205
+
+    def __init__(self, row, col, xf_index, number, is_error):
+        self._rec_data = pack('<3HBB', row, col, xf_index, number, is_error)
+
+
+class FormulaRecord(BiffRecord):
+    """
+    Offset Size Contents
+    0      2    Index to row
+    2      2    Index to column
+    4      2    Index to XF record
+    6      8    Result of the formula
+    14     2    Option flags:
+                Bit Mask    Contents
+                0   0001H   1 = Recalculate always
+                1   0002H   1 = Calculate on open
+                3   0008H   1 = Part of a shared formula
+    16     4    Not used
+    20     var. Formula data (RPN token array)
+
+    """
+    _REC_ID = 0x0006
+
+    def __init__(self, row, col, xf_index, rpn, calc_flags=0):
+        self._rec_data = pack('<3HQHL', row, col, xf_index, 0xFFFF000000000003, calc_flags & 3, 0) + rpn
+
+
+class GutsRecord(BiffRecord):
+    """
+    This record contains information about the layout of outline symbols.
+
+    Record GUTS, BIFF3-BIFF8:
+
+    Offset  Size    Contents
+    0       2       Width of the area to display row outlines (left of the sheet), in pixel
+    2       2       Height of the area to display column outlines (above the sheet), in pixel
+    4       2       Number of visible row outline levels (used row levels + 1; or 0, if not used)
+    6       2       Number of visible column outline levels (used column levels + 1; or 0, if not used)
+
+    """
+
+    _REC_ID = 0x0080
+
+    def __init__(self, row_gut_width, col_gut_height, row_visible_levels, col_visible_levels):
+        self._rec_data = pack('<4H', row_gut_width, col_gut_height, row_visible_levels, col_visible_levels)
+
+class WSBoolRecord(BiffRecord):
+    """
+    This  record stores a 16 bit value with Boolean options for the current
+    sheet.  From BIFF5 on the "Save external linked values" option is moved
+    to the record BOOKBOOL.
+
+    Option flags of record WSBOOL, BIFF3-BIFF8:
+
+    Bit     Mask    Contents
+    0       0001H   0 = Do not show automatic page breaks
+                    1 = Show automatic page breaks
+    4       0010H   0 = Standard sheet
+                    1 = Dialogue sheet (BIFF5-BIFF8)
+    5       0020H   0 = No automatic styles in outlines
+                    1 = Apply automatic styles to outlines
+    6       0040H   0 = Outline buttons above outline group
+                    1 = Outline buttons below outline group
+    7       0080H   0 = Outline buttons left of outline group
+                    1 = Outline buttons right of outline group
+    8       0100H   0 = Scale printout in percent
+                    1 = Fit printout to number of pages
+    9       0200H   0 = Save external linked values (BIFF3?BIFF4 only)
+                    1 = Do not save external linked values (BIFF3?BIFF4 only)
+    10      0400H   0 = Do not show row outline symbols
+                    1 = Show row outline symbols
+    11      0800H   0 = Do not show column outline symbols
+                    1 = Show column outline symbols
+    13-12   3000H   These flags specify the arrangement of windows.
+                    They are stored in BIFF4 only.
+                    00 = Arrange windows tiled
+                    01 = Arrange windows horizontal
+                    10 = Arrange windows vertical112 = Arrange windows cascaded
+    The following flags are valid for BIFF4-BIFF8 only:
+    14      4000H   0 = Standard expression evaluation
+                    1 = Alternative expression evaluation
+    15      8000H   0 = Standard formula entries
+                    1 = Alternative formula entries
+
+    """
+    _REC_ID = 0x0081
+
+    def __init__(self, options):
+        self._rec_data = pack('<H', options)
+
+class ColInfoRecord(BiffRecord):
+    """
+    This record specifies the width for a given range of columns.
+    If a column does not have a corresponding COLINFO record,
+    the width specified in the record STANDARDWIDTH is used. If
+    this record is also not present, the contents of the record
+    DEFCOLWIDTH is used instead.
+    This record also specifies a default XF record to use for
+    cells in the columns that are not described by any cell record
+    (which contain the XF index for that cell). Additionally,
+    the option flags field contains hidden, outline, and collapsed
+    options applied at the columns.
+
+    Record COLINFO, BIFF3-BIFF8:
+
+    Offset  Size    Contents
+    0       2       Index to first column in the range
+    2       2       Index to last column in the range
+    4       2       Width of the columns in 1/256 of the width of the zero character, using default font
+                    (first FONT record in the file)
+    6       2       Index to XF record for default column formatting
+    8       2       Option flags:
+                    Bits    Mask    Contents
+                    0       0001H   1 = Columns are hidden
+                    10-8    0700H   Outline level of the columns (0 = no outline)
+                    12      1000H   1 = Columns are collapsed
+    10      2       Not used
+
+    """
+    _REC_ID = 0x007D
+
+    def __init__(self, first_col, last_col, width, xf_index, options):
+        self._rec_data = pack('<6H', first_col, last_col, width, xf_index, options, 0)
+
+class CalcModeRecord(BiffRecord):
+    """
+    This record is part of the Calculation Settings Block.
+    It specifies whether to calculate formulas manually,
+    automatically or automatically except for multiple table operations.
+
+    Record CALCMODE, BIFF2-BIFF8:
+
+    Offset  Size    Contents
+    0       2       FFFFH = automatic except for multiple table operations
+                    0000H = manually
+                    0001H = automatically (default)
+    """
+    _REC_ID = 0x000D
+
+    def __init__(self, calc_mode):
+        self._rec_data = pack('<h', calc_mode)
+
+
+class CalcCountRecord(BiffRecord):
+    """
+    This record is part of the Calculation Settings Block. It specifies the maximum
+    number of times the formulas should be iteratively calculated. This is a fail-safe
+    against mutually recursive formulas locking up a spreadsheet application.
+
+    Record CALCCOUNT, BIFF2-BIFF8:
+
+    Offset  Size    Contents
+    0       2       Maximum number of iterations allowed in circular references
+    """
+
+    _REC_ID = 0x000C
+
+    def __init__(self, calc_count):
+        self._rec_data = pack('<H', calc_count)
+
+class RefModeRecord(BiffRecord):
+    """
+    This record is part of the Calculation Settings Block.
+    It stores which method is used to show cell addresses in formulas.
+    The “RC” mode uses numeric indexes for rows and columns,
+    i.e. “R(1)C(-1)”, or “R1C1:R2C2”.
+    The “A1” mode uses characters for columns and numbers for rows,
+    i.e. “B1”, or “$A$1:$B$2”.
+
+    Record REFMODE, BIFF2-BIFF8:
+
+    Offset  Size    Contents
+    0       2       0 = RC mode; 1 = A1 mode
+
+    """
+    _REC_ID = 0x00F
+
+    def __init__(self, ref_mode):
+        self._rec_data = pack('<H', ref_mode)
+
+class IterationRecord(BiffRecord):
+    """
+    This record is part of the Calculation Settings Block.
+    It stores if iterations are allowed while calculating recursive formulas.
+
+    Record ITERATION, BIFF2-BIFF8:
+
+    Offset  Size    Contents
+    0       2       0 = Iterations off; 1 = Iterations on
+    """
+    _REC_ID = 0x011
+
+    def __init__(self, iterations_on):
+        self._rec_data = pack('<H', iterations_on)
+
+class DeltaRecord(BiffRecord):
+    """
+    This record is part of the Calculation Settings Block.
+    It stores the maximum change of the result to exit an iteration.
+
+    Record DELTA, BIFF2-BIFF8:
+
+    Offset  Size    Contents
+    0       8       Maximum change in iteration
+                    (IEEE 754 floating-point value,
+                     64bit double precision)
+    """
+    _REC_ID = 0x010
+
+    def __init__(self, delta):
+        self._rec_data = pack('<d', delta)
+
+class SaveRecalcRecord(BiffRecord):
+    """
+    This record is part of the Calculation Settings Block.
+    It contains the “Recalculate before save” option in
+    Excel's calculation settings dialogue.
+
+    Record SAVERECALC, BIFF3-BIFF8:
+
+    Offset  Size    Contents
+    0       2       0 = Do not recalculate;
+                    1 = Recalculate before saving the document
+
+    """
+    _REC_ID = 0x05F
+
+    def __init__(self, recalc):
+        self._rec_data = pack('<H', recalc)
+
+class PrintHeadersRecord(BiffRecord):
+    """
+    This record stores if the row and column headers
+    (the areas with row numbers and column letters) will be printed.
+
+    Record PRINTHEADERS, BIFF2-BIFF8:
+
+    Offset  Size    Contents
+    0       2       0 = Do not print row/column headers;
+                    1 = Print row/column headers
+    """
+    _REC_ID = 0x02A
+
+    def __init__(self, print_headers):
+        self._rec_data = pack('<H', print_headers)
+
+
+class PrintGridLinesRecord(BiffRecord):
+    """
+    This record stores if sheet grid lines will be printed.
+
+    Record PRINTGRIDLINES, BIFF2-BIFF8:
+
+    Offset  Size    Contents
+    0       2       0 = Do not print sheet grid lines;
+                    1 = Print sheet grid lines
+
+    """
+    _REC_ID = 0x02B
+
+    def __init__(self, print_grid):
+        self._rec_data = pack('<H', print_grid)
+
+
+class GridSetRecord(BiffRecord):
+    """
+    This record specifies if the option to print sheet grid lines
+    (record PRINTGRIDLINES) has ever been changed.
+
+    Record GRIDSET, BIFF3-BIFF8:
+
+    Offset  Size    Contents
+    0       2       0 = Print grid lines option never changed
+                    1 = Print grid lines option changed
+    """
+    _REC_ID = 0x082
+
+    def __init__(self, print_grid_changed):
+        self._rec_data = pack('<H', print_grid_changed)
+
+
+class DefaultRowHeightRecord(BiffRecord):
+    """
+    This record specifies the default height and default flags
+    for rows that do not have a corresponding ROW record.
+
+    Record DEFAULTROWHEIGHT, BIFF3-BIFF8:
+
+    Offset  Size    Contents
+    0       2       Option flags:
+                    Bit Mask    Contents
+                    0   0001H   1 = Row height and default font height do not match
+                    1   0002H   1 = Row is hidden
+                    2   0004H   1 = Additional space above the row
+                    3   0008H   1 = Additional space below the row
+    2       2       Default height for unused rows, in twips = 1/20 of a point
+
+    """
+    _REC_ID = 0x0225
+
+    def __init__(self, options, def_height):
+        self._rec_data = pack('<2H', options, def_height)
+
+
+class DefColWidthRecord(BiffRecord):
+    """
+    This record specifies the default column width for columns that
+    do not have a specific width set using the record COLINFO or COLWIDTH.
+    This record has no effect, if a STANDARDWIDTH record is present in the file.
+
+    Record DEFCOLWIDTH, BIFF2-BIFF8:
+
+    Offset  Size    Contents
+    0       2       Column width in characters, using the width of the zero
+                    character from default font (first FONT record in the file)
+    """
+    _REC_ID = 0x0055
+
+    def __init__(self, def_width):
+        self._rec_data = pack('<H', options, def_width)
+
+class HorizontalPageBreaksRecord(BiffRecord):
+    """
+    This  record  is  part  of  the  Page  Settings  Block. It contains all
+    horizontal manual page breaks.
+
+    Record HORIZONTALPAGEBREAKS, BIFF8:
+    Offset  Size  Contents
+    0       2     Number of following row index structures (nm)
+    2       6nm   List of nm row index structures. Each row index
+                  structure contains:
+                    Offset  Size    Contents
+                    0       2       Index to first row below the page break
+                    2       2       Index to first column of this page break
+                    4       2       Index to last column of this page break
+
+    The row indexes in the lists must be ordered ascending.
+    If in BIFF8 a row contains several page breaks, they must be ordered
+    ascending by start column index.
+    """
+    _REC_ID = 0x001B
+
+    def __init__(self, breaks_list):
+        self._rec_data = pack('<H', len(breaks_list))
+        for r, c1, c2 in breaks_list:
+            self._rec_data += pack('<3H', r, c1, c2)
+
+class VerticalPageBreaksRecord(BiffRecord):
+    """
+    This  record  is  part  of  the  Page  Settings  Block. It contains all
+    vertical manual page breaks.
+
+    Record VERTICALPAGEBREAKS, BIFF8:
+    Offset  Size  Contents
+    0       2     Number of following column index structures (nm)
+    2       6nm   List of nm column index structures. Each column index
+                  structure contains:
+                    Offset  Size    Contents
+                    0       2       Index to first column following the page
+                                    break
+                    2       2       Index to first row of this page break
+                    4       2       Index to last row of this page break
+
+    The column indexes in the lists must be ordered ascending.
+    If in BIFF8 a column contains several page breaks, they must be ordered
+    ascending by start row index.
+    """
+    _REC_ID = 0x001A
+
+    def __init__(self, breaks_list):
+        self._rec_data = pack('<H', len(breaks_list))
+        for r, c1, c2 in breaks_list:
+            self._rec_data += pack('<3H', r, c1, c2)
+
+class HeaderRecord(BiffRecord):
+    """
+    This record is part of the Page Settings Block. It specifies the
+    page  header  string  for  the current worksheet. If this record is not
+    present  or  completely  empty  (record  size is 0), the sheet does not
+    contain a page header.
+
+    Record HEADER for non-empty page header, BIFF2-BIFF8:
+    Offset      Size    Contents
+    0           var.    Page header string
+                        BIFF2-BIFF7:    Non-empty byte string, 8bit string
+                        length
+                        BIFF8: Non-empty Unicode string, 16bit string length
+    The  header  string may contain special commands, i.e. placeholders for
+    the  page  number,  current  date, or text formatting attributes. These
+    fields  are  represented  by  single  letters (exception: font name and
+    size,  see  below)  with  a  leading  ampersand ("&"). If the ampersand
+    is  part  of the regular header text, it will be duplicated ("&&"). The
+    page  header is divided into 3 sections: the left, the centred, and the
+    right  section.  Each  section  is introduced by a special command. All
+    text  and all commands following are part of the selected section. Each
+    section  starts  with the text formatting specified in the default font
+    (first  FONT  record  in  the  file). Active formatting attributes from
+    a previous section do not go into the next section.
+
+    The following table shows all available commands:
+
+    Command         Contents
+    &&              The "&" character itself
+    &L              Start of the left section
+    &C              Start of the centred section
+    &R              Start of the right section
+    &P              Current page number
+    &N              Page count
+    &D              Current date
+    &T              Current time
+    &A              Sheet name (BIFF5-BIFF8)
+    &F              File name without path
+    &Z              File path without file name (BIFF8X)
+    &G              Picture (BIFF8X)
+    &B              Bold on/off (BIFF2-BIFF4)
+    &I              Italic on/off (BIFF2-BIFF4)
+    &U              Underlining on/off
+    &E              Double underlining on/off (BIFF5-BIFF8)
+    &S              Strikeout on/off
+    &X              Superscript on/off (BIFF5-BIFF8)
+    &Y              Subscript on/off (BIFF5-BIFF8)
+    &"<fontname>"   Set new font <fontname>
+    &"<fontname>,<fontstyle>"
+                    Set new font with specified style <fontstyle>.
+                    The style <fontstyle> is in most cases one of
+                    "Regular", "Bold", "Italic", or "Bold Italic".
+                    But this setting is dependent on the used font,
+                    it may differ (localised style names, or "Standard",
+                    "Oblique", ...). (BIFF5-BIFF8)
+    &<fontheight>   Set font height in points (<fontheight> is a decimal value).
+                    If this command is followed by a plain number to be printed
+                    in the header, it will be separated from the font height
+                    with a space character.
+
+    """
+    _REC_ID = 0x0014
+
+    def __init__(self, header_str):
+        self._rec_data = upack2(header_str)
+
+class FooterRecord(BiffRecord):
+    """
+    Semantic is equal to HEADER record
+    """
+    _REC_ID = 0x0015
+
+    def __init__(self, footer_str):
+        self._rec_data = upack2(footer_str)
+
+
+class HCenterRecord(BiffRecord):
+    """
+    This  record  is  part  of the Page Settings Block. It specifies if the
+    sheet is centred horizontally when printed.
+
+    Record HCENTER, BIFF3-BIFF8:
+
+    Offset  Size    Contents
+    0       2       0 = Print sheet left aligned
+                    1 = Print sheet centred horizontally
+
+    """
+    _REC_ID = 0x0083
+
+    def __init__(self, is_horz_center):
+        self._rec_data = pack('<H', is_horz_center)
+
+
+class VCenterRecord(BiffRecord):
+    """
+    This  record  is  part  of the Page Settings Block. It specifies if the
+    sheet is centred vertically when printed.
+
+    Record VCENTER, BIFF3-BIFF8:
+
+    Offset  Size    Contents
+    0       2       0 = Print sheet aligned at top page border
+                    1 = Print sheet vertically centred
+
+    """
+    _REC_ID = 0x0084
+
+    def __init__(self, is_vert_center):
+        self._rec_data = pack('<H', is_vert_center)
+
+
+class LeftMarginRecord(BiffRecord):
+    """
+    This  record  is  part of the Page Settings Block. It contains the left
+    page margin of the current worksheet.
+
+    Record LEFTMARGIN, BIFF2-BIFF8:
+
+    Offset  Size    Contents
+    0       8       Left page margin in inches
+                    (IEEE 754 floating-point value, 64bit double precision)
+
+    """
+    _REC_ID = 0x0026
+
+    def __init__(self, margin):
+        self._rec_data = pack('<d', margin)
+
+
+class RightMarginRecord(BiffRecord):
+    """
+    This  record  is  part of the Page Settings Block. It contains the right
+    page margin of the current worksheet.
+
+    Offset  Size    Contents
+    0       8       Right page margin in inches
+                    (IEEE 754 floating-point value, 64?bit double precision)
+
+    """
+    _REC_ID = 0x0027
+
+    def __init__(self, margin):
+        self._rec_data = pack('<d', margin)
+
+class TopMarginRecord(BiffRecord):
+    """
+    This  record  is  part of the Page Settings Block. It contains the top
+    page margin of the current worksheet.
+
+    Offset  Size    Contents
+    0       8       Top page margin in inches
+                    (IEEE 754 floating-point value, 64?bit double precision)
+
+    """
+    _REC_ID = 0x0028
+
+    def __init__(self, margin):
+        self._rec_data = pack('<d', margin)
+
+
+class BottomMarginRecord(BiffRecord):
+    """
+    This  record  is  part of the Page Settings Block. It contains the bottom
+    page margin of the current worksheet.
+
+    Offset  Size    Contents
+    0       8       Bottom page margin in inches
+                    (IEEE 754 floating-point value, 64?bit double precision)
+
+    """
+    _REC_ID = 0x0029
+
+    def __init__(self, margin):
+        self._rec_data = pack('<d', margin)
+
+class SetupPageRecord(BiffRecord):
+    """
+    This   record   is  part of the Page Settings Block. It stores the page
+    format   settings   of   the  current sheet. The pages may be scaled in
+    percent   or  by  using  an  absolute  number of pages. This setting is
+    located   in  the  WSBOOL  record.  If  pages  are  scaled in  percent,
+    the   scaling  factor  in  this  record is used, otherwise the "Fit  to
+    pages"  values. One of the "Fit to pages" values may be 0. In this case
+    the sheet is scaled to fit only to the other value.
+
+    Record SETUP, BIFF5-BIFF8:
+
+    Offset      Size    Contents
+    0           2       Paper size (see below)
+    2           2       Scaling factor in percent
+    4           2       Start page number
+    6           2       Fit worksheet width to this number of pages
+                        (0 = use as many as needed)
+    8           2       Fit worksheet height to this number of pages
+                        (0 = use as many as needed)
+    10          2       Option flags:
+                        Bit     Mask        Contents
+                        0       0001H       0 = Print pages in columns
+                                            1 = Print pages in rows
+                        1       0002H       0 = Landscape
+                                            1 = Portrait
+                        2       0004H       1 = Paper size, scaling factor,
+                                            paper orientation (portrait/landscape),
+                                            print resolution and number of copies
+                                            are not initialised
+                        3       0008H       0 = Print coloured
+                                            1 = Print black and white
+                        4       0010H       0 = Default print quality
+                                            1 = Draft quality
+                        5       0020H       0 = Do not print cell notes
+                                            1 = Print cell notes
+                        6       0040H       0 = Paper orientation setting is valid
+                                            1 = Paper orientation setting not
+                                            initialised
+                        7       0080H       0 = Automatic page numbers
+                                            1 = Use start page number
+                        The following flags are valid for BIFF8 only:
+                        9       0200H       0 = Print notes as displayed
+                                            1 = Print notes at end of sheet
+                        11-10   0C00H       00 = Print errors as displayed
+                                            01 = Do not print errors
+                                            10 = Print errors as "--"
+                                            11 = Print errors as "#N/A!"
+    12          2       Print resolution in dpi
+    14          2       Vertical print resolution in dpi
+    16          8       Header margin (IEEE 754 floating-point value,
+                        64bit double precision)
+    24          8       Footer margin (IEEE 754 floating-point value,
+                        64bit double precision)
+    32          2       Number of copies to print
+
+
+    PAPER TYPES:
+
+    Index   Paper type              Paper size
+    0       Undefined
+    1       Letter                  8 1/2" x 11"
+    2       Letter small            8 1/2" x 11"
+    3       Tabloid                 11" x 17"
+    4       Ledger                  17" x 11"
+    5       Legal                   8 1/2" x 14"
+    6       Statement               5 1/2" x 8 1/2"
+    7       Executive               7 1/4" x 10 1/2"
+    8       A3                      297mm x 420mm
+    9       A4                      210mm x 297mm
+    10      A4 small                210mm x 297mm
+    11      A5                      148mm x 210mm
+    12      B4 (JIS)                257mm x 364mm
+    13      B5 (JIS)                182mm x 257mm
+    14      Folio                   8 1/2" x 13"
+    15      Quarto                  215mm x 275mm
+    16      10x14                   10" x 14"
+    17      11x17                   11" x 17"
+    18      Note                    8 1/2" x 11"
+    19      Envelope #9             3 7/8" x 8 7/8"
+    20      Envelope #10            4 1/8" x 9 1/2"
+    21      Envelope #11            4 1/2" x 10 3/8"
+    22      Envelope #12            4 3/4" x 11"
+    23      Envelope #14            5" x 11 1/2"
+    24      C                       17" x 22"
+    25      D                       22" x 34"
+    26      E                       34" x 44"
+    27      Envelope DL             110mm x 220mm
+    28      Envelope C5             162mm x 229mm
+    29      Envelope C3             324mm x 458mm
+    30      Envelope C4             229mm x 324mm
+    31      Envelope C6             114mm x 162mm
+    32      Envelope C6/C5          114mm x 229mm
+    33      B4 (ISO)                250mm x 353mm
+    34      B5 (ISO)                176mm x 250mm
+    35      B6 (ISO)                125mm x 176mm
+    36      Envelope Italy          110mm x 230mm
+    37      Envelope Monarch        3 7/8" x 7 1/2"
+    38      63/4 Envelope           3 5/8" x 6 1/2"
+    39      US Standard Fanfold     14 7/8" x 11"
+    40      German Std. Fanfold     8 1/2" x 12"
+    41      German Legal Fanfold    8 1/2" x 13"
+    42      B4 (ISO)                250mm x 353mm
+    43      Japanese Postcard       100mm x 148mm
+    44      9x11                    9" x 11"
+    45      10x11                   10" x 11"
+    46      15x11                   15" x 11"
+    47      Envelope Invite         220mm x 220mm
+    48      Undefined
+    49      Undefined
+    50      Letter Extra            9 1/2" x 12"
+    51      Legal Extra             9 1/2" x 15"
+    52      Tabloid Extra           11 11/16" x 18"
+    53      A4 Extra                235mm x 322mm
+    54      Letter Transverse       8 1/2" x 11"
+    55      A4 Transverse           210mm x 297mm
+    56      Letter Extra Transv.    9 1/2" x 12"
+    57      Super A/A4              227mm x 356mm
+    58      Super B/A3              305mm x 487mm
+    59      Letter Plus             8 1/2" x 12 11/16"
+    60      A4 Plus                 210mm x 330mm
+    61      A5 Transverse           148mm x 210mm
+    62      B5 (JIS) Transverse     182mm x 257mm
+    63      A3 Extra                322mm x 445mm
+    64      A5 Extra                174mm x 235mm
+    65      B5 (ISO) Extra          201mm x 276mm
+    66      A2                      420mm x 594mm
+    67      A3 Transverse           297mm x 420mm
+    68      A3 Extra Transverse     322mm x 445mm
+    69      Dbl. Japanese Postcard  200mm x 148mm
+    70      A6                      105mm x 148mm
+    71
+    72
+    73
+    74
+    75      Letter Rotated          11" x 8 1/2"
+    76      A3 Rotated              420mm x 297mm
+    77      A4 Rotated              297mm x 210mm
+    78      A5 Rotated              210mm x 148mm
+    79      B4 (JIS) Rotated        364mm x 257mm
+    80      B5 (JIS) Rotated        257mm x 182mm
+    81      Japanese Postcard Rot.  148mm x 100mm
+    82      Dbl. Jap. Postcard Rot. 148mm x 200mm
+    83      A6 Rotated              148mm x 105mm
+    84
+    85
+    86
+    87
+    88      B6 (JIS)                128mm x 182mm
+    89      B6 (JIS) Rotated        182mm x 128mm
+    90      12x11                   12" x 11"
+
+    """
+    _REC_ID = 0x00A1
+    def __init__(self, paper, scaling, start_num, fit_width_to, fit_height_to,
+                    options,
+                    hres, vres,
+                    header_margin, footer_margin,
+                    num_copies):
+        self._rec_data = pack('<8H2dH', paper, scaling, start_num,
+                                        fit_width_to, fit_height_to, \
+                                        options,
+                                        hres, vres,
+                                        header_margin, footer_margin,
+                                        num_copies)
+
+class NameRecord(BiffRecord):
+    """
+    This record is part of a Link Table. It contains the name and the token
+    array of an internal defined name. Token arrays of defined names
+    contain tokens with aberrant token classes.
+
+    Record NAME, BIFF5/BIFF7:
+    Offset      Size    Contents
+       0          2     Option flags, see below
+       2          1     Keyboard shortcut (only for command macro names, see below)
+       3          1     Length of the name (character count, ln)
+       4          2     Size of the formula data (sz)
+       6          2     0 = Global name, otherwise index to EXTERNSHEET record (one-based)
+       8          2     0 = Global name, otherwise index to sheet (one-based)
+      10          1     Length of menu text (character count, lm)
+      11          1     Length of description text (character count, ld)
+      12          1     Length of help topic text (character count, lh)
+      13          1     Length of status bar text (character count, ls)
+      14         ln     Character array of the name
+    14+ln        sz     Formula data (RPN token array without size field, 4)
+  14+ln+sz       lm     Character array of menu text
+     var.        ld     Character array of description text
+     var.        lh     Character array of help topic text
+     var.        ls     Character array of status bar text
+
+    Record NAME, BIFF8:
+    Offset      Size Contents
+       0          2  Option flags, see below
+       2          1  Keyboard shortcut (only for command macro names, see below)
+       3          1  Length of the name (character count, ln)
+       4          2  Size of the formula data (sz)
+       6          2  Not used
+       8          2  0 = Global name, otherwise index to sheet (one-based)
+      10          1  Length of menu text (character count, lm)
+      11          1  Length of description text (character count, ld)
+      12          1  Length of help topic text (character count, lh)
+      13          1  Length of status bar text (character count, ls)
+      14        var. Name (Unicode string without length field, 3.4)
+     var.        sz  Formula data (RPN token array without size field, 4)
+    [var.]      var. (optional, only if lm > 0) Menu text (Unicode string without length field, 3.4)
+    [var.]      var. (optional, only if ld > 0) Description text (Unicode string without length field, 3.4)
+    [var.]      var. (optional, only if lh > 0) Help topic text (Unicode string without length field, 3.4)
+    [var.]      var. (optional, only if ls > 0) Status bar text (Unicode string without length field, 3.4)
+    """
+    _REC_ID = 0x0018
+
+    def __init__(self, options, keyboard_shortcut, name, sheet_index, rpn, menu_text='', desc_text='', help_text='', status_text=''):
+        if type(name) == int:
+            uname = chr(name)
+        else:
+            uname = upack1(name)[1:]
+        uname_len = len(uname)
+
+        #~ self._rec_data = pack('<HBBHHHBBBB%ds%ds' % (uname_len, len(rpn)), options, keyboard_shortcut, uname_len, len(rpn), 0x0000, sheet_index, len(menu_text), len(desc_text), len(help_text), len(status_text), uname, rpn) + menu_text + desc_text + help_text + status_text
+        self._rec_data = pack('<HBBHHHBBBBB%ds%ds' % (uname_len, len(rpn)), options, keyboard_shortcut, uname_len, len(rpn), 0x0000, sheet_index, 0x00, len(menu_text), len(desc_text), len(help_text), len(status_text), uname, rpn) + menu_text + desc_text + help_text + status_text
+
+# Excel (both 2003 and 2007) don't like refs
+# split over a record boundary, which is what the
+# standard BiffRecord.get method does.
+
+# 8224 max data bytes in a BIFF record
+# 6 bytes per ref
+# 1370 = floor((8224 - 2) / 6.0) max refs in a record
+
+_maxRefPerRecord = 1370
+
+class ExternSheetRecord(BiffRecord):
+    """
+    In BIFF8 the record stores a list with indexes to SUPBOOK
+    records (list of REF structures, 6.100). See 5.10.3 for
+    details about external references in BIFF8.
+
+    Record EXTERNSHEET, BIFF8:
+    Offset          Size      Contents
+       0             2        Number of following REF structures (nm)
+       2           6nm        List of nm REF structures. Each REF contains the following data:
+                              Offset     Size     Contents
+                                 0         2      Index to SUPBOOK record
+                                 2         2      Index to first SUPBOOK sheet
+                                 4         2      Index to last SUPBOOK sheet
+    """
+    _REC_ID = 0x0017
+
+    def __init__(self, refs):
+
+        # do we always need this ref? or only if there are no refs?
+        # (I believe that if there are no refs then we should not generate the link table - Ruben)
+        #refs.insert(0, (0,0,0))
+
+        self.refs = refs
+
+    def get(self):
+        res = []
+        nrefs = len(self.refs)
+        for idx in xrange(0, nrefs, _maxRefPerRecord):
+            chunk = self.refs[idx:idx+_maxRefPerRecord]
+            krefs = len(chunk)
+            if idx: # CONTINUE record
+                header = pack("<HH", 0x003C, 6 * krefs)
+            else: # ExternSheetRecord
+                header = pack("<HHH", self._REC_ID, 6 * krefs + 2, nrefs)
+            res.append(header)
+            res.extend([pack("<HHH", *r) for r in chunk])
+        return ''.join(res)
+
+class SupBookRecord(BiffRecord):
+    """
+    This record mainly stores the URL of an external document
+    and a list of sheet names inside this document. Furthermore
+    it is used to store DDE and OLE object links, or to indicate
+    an internal 3D reference or an add-in function. See 5.10.3
+    for details about external references in BIFF8.
+
+    """
+    _REC_ID = 0x01AE
+
+class InternalReferenceSupBookRecord(SupBookRecord):
+    """
+    In each file occurs a SUPBOOK that is used for internal 3D
+    references. It stores the number of sheets of the own document.
+
+    Record SUPBOOK for 3D references, BIFF8:
+    Offset         Size   Contents
+      0             2     Number of sheets in this document
+      2             2     01H 04H (relict of BIFF5/BIFF7, the byte string "<04H>", see 3.9.1)
+
+    """
+
+    def __init__(self, num_sheets):
+        self._rec_data = pack('<HBB', num_sheets, 0x01, 0x04)
+
+class XcallSupBookRecord(SupBookRecord):
+    """
+    Add-in function names are stored in EXTERNNAME records following this record.
+
+    Offset  Size    Contents
+    0       2       0001H
+    2       2       01H 3AH (relict of BIFF5, the byte string ':', see EXTERNSHEET record, 5.41)
+
+    """
+
+    def __init__(self):
+        self._rec_data = pack('<HBB', 1, 0x01, 0x3A)
+
+
+class ExternnameRecord(BiffRecord):
+    """
+    Record EXTERNNAME for external names and Analysis add-in functions, BIFF5-BIFF8:
+    Offset  Size    Contents
+    0       2       Option flags (see below)
+    2       2       0 for global names, or:
+                    BIFF5: One-based index to EXTERNSHEET record containing the sheet name,
+                    BIFF8: One-based index to sheet list in preceding EXTERNALBOOK record.
+    4       2       Not used
+    6       var.    BIFF5: Name (byte string, 8-bit string length, ?2.5.2).
+                    BIFF8: Name (Unicode string, 8-bit string length, ?2.5.3).
+                    See DEFINEDNAME record (?5.33) for a list of built-in names, if the built-in flag is set
+                    in the option flags above.
+    var.    var.    Formula data (RPN token array, ?3)
+
+    Option flags for external names (BIFF5-BIFF8)
+    Bit     Mask    Contents
+    0       0001H   0 = Standard name; 1 = Built-in name
+    1       0002H   0 = Manual link; 1 = Automatic link (DDE links and OLE links only)
+    2       0004H   1 = Picture link (DDE links and OLE links only)
+    3       0008H   1 = This is the “StdDocumentName” identifier (DDE links only)
+    4       0010H   1 = OLE link
+    14-5    7FE0H   Clipboard format of last successful update (DDE links and OLE links only)
+    15      8000H   1 = Iconified picture link (BIFF8 OLE links only)
+    """
+    _REC_ID = 0x0023
+
+    def __init__(self, options=0, index=0, name=None, fmla=None):
+        self._rec_data = pack('<HHH', options, index, 0) + upack1(name) + fmla
+
diff --git a/tablib/packages/xlwt/Bitmap.py b/tablib/packages/xlwt/Bitmap.py
new file mode 100644
index 0000000..d271665
--- /dev/null
+++ b/tablib/packages/xlwt/Bitmap.py
@@ -0,0 +1,262 @@
+# -*- coding: windows-1251 -*-
+
+#  Portions are Copyright (C) 2005 Roman V. Kiseliov
+#  Portions are Copyright (c) 2004 Evgeny Filatov <fufff@users.sourceforge.net>
+#  Portions are Copyright (c) 2002-2004 John McNamara (Perl Spreadsheet::WriteExcel)
+
+from BIFFRecords import BiffRecord
+from struct import *
+
+
+def _size_col(sheet, col):
+    return sheet.col_width(col)
+
+
+def _size_row(sheet, row):
+    return sheet.row_height(row)
+
+
+def _position_image(sheet, row_start, col_start, x1, y1, width, height):
+    """Calculate the vertices that define the position of the image as required by
+    the OBJ record.
+
+             +------------+------------+
+             |     A      |      B     |
+       +-----+------------+------------+
+       |     |(x1,y1)     |            |
+       |  1  |(A1)._______|______      |
+       |     |    |              |     |
+       |     |    |              |     |
+       +-----+----|    BITMAP    |-----+
+       |     |    |              |     |
+       |  2  |    |______________.     |
+       |     |            |        (B2)|
+       |     |            |     (x2,y2)|
+       +---- +------------+------------+
+
+    Example of a bitmap that covers some of the area from cell A1 to cell B2.
+
+    Based on the width and height of the bitmap we need to calculate 8 vars:
+        col_start, row_start, col_end, row_end, x1, y1, x2, y2.
+    The width and height of the cells are also variable and have to be taken into
+    account.
+    The values of col_start and row_start are passed in from the calling
+    function. The values of col_end and row_end are calculated by subtracting
+    the width and height of the bitmap from the width and height of the
+    underlying cells.
+    The vertices are expressed as a percentage of the underlying cell width as
+    follows (rhs values are in pixels):
+
+           x1 = X / W *1024
+           y1 = Y / H *256
+           x2 = (X-1) / W *1024
+           y2 = (Y-1) / H *256
+
+           Where:  X is distance from the left side of the underlying cell
+                   Y is distance from the top of the underlying cell
+                   W is the width of the cell
+                   H is the height of the cell
+
+    Note: the SDK incorrectly states that the height should be expressed as a
+    percentage of 1024.
+
+    col_start  - Col containing upper left corner of object
+    row_start  - Row containing top left corner of object
+    x1  - Distance to left side of object
+    y1  - Distance to top of object
+    width  - Width of image frame
+    height  - Height of image frame
+
+    """
+    # Adjust start column for offsets that are greater than the col width
+    while x1 >= _size_col(sheet, col_start):
+        x1 -= _size_col(sheet, col_start)
+        col_start += 1
+    # Adjust start row for offsets that are greater than the row height
+    while y1 >= _size_row(sheet, row_start):
+        y1 -= _size_row(sheet, row_start)
+        row_start += 1
+    # Initialise end cell to the same as the start cell
+    row_end = row_start   # Row containing bottom right corner of object
+    col_end = col_start   # Col containing lower right corner of object
+    width = width + x1 - 1
+    height = height + y1 - 1
+    # Subtract the underlying cell widths to find the end cell of the image
+    while (width >= _size_col(sheet, col_end)):
+        width -= _size_col(sheet, col_end)
+        col_end += 1
+    # Subtract the underlying cell heights to find the end cell of the image
+    while (height >= _size_row(sheet, row_end)):
+        height -= _size_row(sheet, row_end)
+        row_end += 1
+    # Bitmap isn't allowed to start or finish in a hidden cell, i.e. a cell
+    # with zero height or width.
+    if ((_size_col(sheet, col_start) == 0) or (_size_col(sheet, col_end) == 0)
+            or (_size_row(sheet, row_start) == 0) or (_size_row(sheet, row_end) == 0)):
+        return
+    # Convert the pixel values to the percentage value expected by Excel
+    x1 = int(float(x1) / _size_col(sheet, col_start) * 1024)
+    y1 = int(float(y1) / _size_row(sheet, row_start) * 256)
+    # Distance to right side of object
+    x2 = int(float(width) / _size_col(sheet, col_end) * 1024)
+    # Distance to bottom of object
+    y2 = int(float(height) / _size_row(sheet, row_end) * 256)
+    return (col_start, x1, row_start, y1, col_end, x2, row_end, y2)
+
+
+class ObjBmpRecord(BiffRecord):
+    _REC_ID = 0x005D    # Record identifier
+
+    def __init__(self, row, col, sheet, im_data_bmp, x, y, scale_x, scale_y):
+        # Scale the frame of the image.
+        width = im_data_bmp.width * scale_x
+        height = im_data_bmp.height * scale_y
+
+        # Calculate the vertices of the image and write the OBJ record
+        coordinates = _position_image(sheet, row, col, x, y, width, height)
+        # print coordinates
+        col_start, x1, row_start, y1, col_end, x2, row_end, y2 = coordinates
+
+        """Store the OBJ record that precedes an IMDATA record. This could be generalise
+        to support other Excel objects.
+
+        """
+        cObj = 0x0001      # Count of objects in file (set to 1)
+        OT = 0x0008        # Object type. 8 = Picture
+        id = 0x0001        # Object ID
+        grbit = 0x0614     # Option flags
+        colL = col_start    # Col containing upper left corner of object
+        dxL = x1            # Distance from left side of cell
+        rwT = row_start     # Row containing top left corner of object
+        dyT = y1            # Distance from top of cell
+        colR = col_end      # Col containing lower right corner of object
+        dxR = x2            # Distance from right of cell
+        rwB = row_end       # Row containing bottom right corner of object
+        dyB = y2            # Distance from bottom of cell
+        cbMacro = 0x0000    # Length of FMLA structure
+        Reserved1 = 0x0000  # Reserved
+        Reserved2 = 0x0000  # Reserved
+        icvBack = 0x09      # Background colour
+        icvFore = 0x09      # Foreground colour
+        fls = 0x00          # Fill pattern
+        fAuto = 0x00        # Automatic fill
+        icv = 0x08          # Line colour
+        lns = 0xff          # Line style
+        lnw = 0x01          # Line weight
+        fAutoB = 0x00       # Automatic border
+        frs = 0x0000        # Frame style
+        cf = 0x0009         # Image format, 9 = bitmap
+        Reserved3 = 0x0000  # Reserved
+        cbPictFmla = 0x0000 # Length of FMLA structure
+        Reserved4 = 0x0000  # Reserved
+        grbit2 = 0x0001     # Option flags
+        Reserved5 = 0x0000  # Reserved
+
+        data = pack("<L", cObj)
+        data += pack("<H", OT)
+        data += pack("<H", id)
+        data += pack("<H", grbit)
+        data += pack("<H", colL)
+        data += pack("<H", dxL)
+        data += pack("<H", rwT)
+        data += pack("<H", dyT)
+        data += pack("<H", colR)
+        data += pack("<H", dxR)
+        data += pack("<H", rwB)
+        data += pack("<H", dyB)
+        data += pack("<H", cbMacro)
+        data += pack("<L", Reserved1)
+        data += pack("<H", Reserved2)
+        data += pack("<B", icvBack)
+        data += pack("<B", icvFore)
+        data += pack("<B", fls)
+        data += pack("<B", fAuto)
+        data += pack("<B", icv)
+        data += pack("<B", lns)
+        data += pack("<B", lnw)
+        data += pack("<B", fAutoB)
+        data += pack("<H", frs)
+        data += pack("<L", cf)
+        data += pack("<H", Reserved3)
+        data += pack("<H", cbPictFmla)
+        data += pack("<H", Reserved4)
+        data += pack("<H", grbit2)
+        data += pack("<L", Reserved5)
+
+        self._rec_data = data
+
+def _process_bitmap(bitmap):
+    """Convert a 24 bit bitmap into the modified internal format used by Windows.
+    This is described in BITMAPCOREHEADER and BITMAPCOREINFO structures in the
+    MSDN library.
+
+    """
+    # Open file and binmode the data in case the platform needs it.
+    fh = file(bitmap, "rb")
+    try:
+        # Slurp the file into a string.
+        data = fh.read()
+    finally:
+        fh.close()
+    # Check that the file is big enough to be a bitmap.
+    if len(data) <= 0x36:
+        raise Exception("bitmap doesn't contain enough data.")
+    # The first 2 bytes are used to identify the bitmap.
+    if (data[:2] != "BM"):
+        raise Exception("bitmap doesn't appear to to be a valid bitmap image.")
+    # Remove bitmap data: ID.
+    data = data[2:]
+    # Read and remove the bitmap size. This is more reliable than reading
+    # the data size at offset 0x22.
+    #
+    size = unpack("<L", data[:4])[0]
+    size -=  0x36   # Subtract size of bitmap header.
+    size +=  0x0C   # Add size of BIFF header.
+    data = data[4:]
+    # Remove bitmap data: reserved, offset, header length.
+    data = data[12:]
+    # Read and remove the bitmap width and height. Verify the sizes.
+    width, height = unpack("<LL", data[:8])
+    data = data[8:]
+    if (width > 0xFFFF):
+        raise Exception("bitmap: largest image width supported is 65k.")
+    if (height > 0xFFFF):
+        raise Exception("bitmap: largest image height supported is 65k.")
+    # Read and remove the bitmap planes and bpp data. Verify them.
+    planes, bitcount = unpack("<HH", data[:4])
+    data = data[4:]
+    if (bitcount != 24):
+        raise Exception("bitmap isn't a 24bit true color bitmap.")
+    if (planes != 1):
+        raise Exception("bitmap: only 1 plane supported in bitmap image.")
+    # Read and remove the bitmap compression. Verify compression.
+    compression = unpack("<L", data[:4])[0]
+    data = data[4:]
+    if (compression != 0):
+        raise Exception("bitmap: compression not supported in bitmap image.")
+    # Remove bitmap data: data size, hres, vres, colours, imp. colours.
+    data = data[20:]
+    # Add the BITMAPCOREHEADER data
+    header = pack("<LHHHH", 0x000c, width, height, 0x01, 0x18)
+    data = header + data
+    return (width, height, size, data)
+
+
+class ImDataBmpRecord(BiffRecord):
+    _REC_ID = 0x007F
+
+    def __init__(self, filename):
+        """Insert a 24bit bitmap image in a worksheet. The main record required is
+        IMDATA but it must be proceeded by a OBJ record to define its position.
+
+        """
+        BiffRecord.__init__(self)
+
+        self.width, self.height, self.size, data = _process_bitmap(filename)
+        # Write the IMDATA record to store the bitmap data
+        cf = 0x09
+        env = 0x01
+        lcb = self.size
+        self._rec_data = pack("<HHL", cf, env, lcb) + data
+
+
diff --git a/tablib/packages/xlwt/Cell.py b/tablib/packages/xlwt/Cell.py
new file mode 100644
index 0000000..23adf8a
--- /dev/null
+++ b/tablib/packages/xlwt/Cell.py
@@ -0,0 +1,243 @@
+# -*- coding: windows-1252 -*-
+
+from struct import unpack, pack
+import BIFFRecords
+
+class StrCell(object):
+    __slots__ = ["rowx", "colx", "xf_idx", "sst_idx"]
+
+    def __init__(self, rowx, colx, xf_idx, sst_idx):
+        self.rowx = rowx
+        self.colx = colx
+        self.xf_idx = xf_idx
+        self.sst_idx = sst_idx
+
+    def get_biff_data(self):
+        # return BIFFRecords.LabelSSTRecord(self.rowx, self.colx, self.xf_idx, self.sst_idx).get()
+        return pack('<5HL', 0x00FD, 10, self.rowx, self.colx, self.xf_idx, self.sst_idx)
+
+class BlankCell(object):
+    __slots__ = ["rowx", "colx", "xf_idx"]
+
+    def __init__(self, rowx, colx, xf_idx):
+        self.rowx = rowx
+        self.colx = colx
+        self.xf_idx = xf_idx
+
+    def get_biff_data(self):
+        # return BIFFRecords.BlankRecord(self.rowx, self.colx, self.xf_idx).get()
+        return pack('<5H', 0x0201, 6, self.rowx, self.colx, self.xf_idx)
+
+class MulBlankCell(object):
+    __slots__ = ["rowx", "colx1", "colx2", "xf_idx"]
+
+    def __init__(self, rowx, colx1, colx2, xf_idx):
+        self.rowx = rowx
+        self.colx1 = colx1
+        self.colx2 = colx2
+        self.xf_idx = xf_idx
+
+    def get_biff_data(self):
+        return BIFFRecords.MulBlankRecord(self.rowx,
+            self.colx1, self.colx2, self.xf_idx).get()
+
+class NumberCell(object):
+    __slots__ = ["rowx", "colx", "xf_idx", "number"]
+
+    def __init__(self, rowx, colx, xf_idx, number):
+        self.rowx = rowx
+        self.colx = colx
+        self.xf_idx = xf_idx
+        self.number = float(number)
+
+    def get_encoded_data(self):
+        rk_encoded = 0
+        num = self.number
+
+        # The four possible kinds of RK encoding are *not* mutually exclusive.
+        # The 30-bit integer variety picks up the most.
+        # In the code below, the four varieties are checked in descending order
+        # of bangs per buck, or not at all.
+        # SJM 2007-10-01
+
+        if -0x20000000 <= num < 0x20000000: # fits in 30-bit *signed* int
+            inum = int(num)
+            if inum == num: # survives round-trip
+                # print "30-bit integer RK", inum, hex(inum)
+                rk_encoded = 2 | (inum << 2)
+                return 1, rk_encoded
+
+        temp = num * 100
+
+        if -0x20000000 <= temp < 0x20000000:
+            # That was step 1: the coded value will fit in
+            # a 30-bit signed integer.
+            itemp = int(round(temp, 0))
+            # That was step 2: "itemp" is the best candidate coded value.
+            # Now for step 3: simulate the decoding,
+            # to check for round-trip correctness.
+            if itemp / 100.0 == num:
+                # print "30-bit integer RK*100", itemp, hex(itemp)
+                rk_encoded = 3 | (itemp << 2)
+                return 1, rk_encoded
+
+        if 0: # Cost of extra pack+unpack not justified by tiny yield.
+            packed = pack('<d', num)
+            w01, w23 = unpack('<2i', packed)
+            if not w01 and not(w23 & 3):
+                # 34 lsb are 0
+                # print "float RK", w23, hex(w23)
+                return 1, w23
+
+            packed100 = pack('<d', temp)
+            w01, w23 = unpack('<2i', packed100)
+            if not w01 and not(w23 & 3):
+                # 34 lsb are 0
+                # print "float RK*100", w23, hex(w23)
+                return 1, w23 | 1
+
+        #print "Number"
+        #print
+        return 0, pack('<5Hd', 0x0203, 14, self.rowx, self.colx, self.xf_idx, num)
+
+    def get_biff_data(self):
+        isRK, value = self.get_encoded_data()
+        if isRK:
+            return pack('<5Hi', 0x27E, 10, self.rowx, self.colx, self.xf_idx, value)
+        return value # NUMBER record already packed
+
+class BooleanCell(object):
+    __slots__ = ["rowx", "colx", "xf_idx", "number"]
+
+    def __init__(self, rowx, colx, xf_idx, number):
+        self.rowx = rowx
+        self.colx = colx
+        self.xf_idx = xf_idx
+        self.number = number
+
+    def get_biff_data(self):
+        return BIFFRecords.BoolErrRecord(self.rowx,
+            self.colx, self.xf_idx, self.number, 0).get()
+
+error_code_map = {
+    0x00:  0, # Intersection of two cell ranges is empty
+    0x07:  7, # Division by zero
+    0x0F: 15, # Wrong type of operand
+    0x17: 23, # Illegal or deleted cell reference
+    0x1D: 29, # Wrong function or range name
+    0x24: 36, # Value range overflow
+    0x2A: 42, # Argument or function not available
+    '#NULL!' :  0, # Intersection of two cell ranges is empty
+    '#DIV/0!':  7, # Division by zero
+    '#VALUE!': 36, # Wrong type of operand
+    '#REF!'  : 23, # Illegal or deleted cell reference
+    '#NAME?' : 29, # Wrong function or range name
+    '#NUM!'  : 36, # Value range overflow
+    '#N/A!'  : 42, # Argument or function not available
+}
+
+class ErrorCell(object):
+    __slots__ = ["rowx", "colx", "xf_idx", "number"]
+
+    def __init__(self, rowx, colx, xf_idx, error_string_or_code):
+        self.rowx = rowx
+        self.colx = colx
+        self.xf_idx = xf_idx
+        try:
+            self.number = error_code_map[error_string_or_code]
+        except KeyError:
+            raise Exception('Illegal error value (%r)' % error_string_or_code)
+
+    def get_biff_data(self):
+        return BIFFRecords.BoolErrRecord(self.rowx,
+            self.colx, self.xf_idx, self.number, 1).get()
+
+class FormulaCell(object):
+    __slots__ = ["rowx", "colx", "xf_idx", "frmla", "calc_flags"]
+
+    def __init__(self, rowx, colx, xf_idx, frmla, calc_flags=0):
+        self.rowx = rowx
+        self.colx = colx
+        self.xf_idx = xf_idx
+        self.frmla = frmla
+        self.calc_flags = calc_flags
+
+    def get_biff_data(self):
+        return BIFFRecords.FormulaRecord(self.rowx,
+            self.colx, self.xf_idx, self.frmla.rpn(), self.calc_flags).get()
+
+# module-level function for *internal* use by the Row module
+
+def _get_cells_biff_data_mul(rowx, cell_items):
+    # Return the BIFF data for all cell records in the row.
+    # Adjacent BLANK|RK records are combined into MUL(BLANK|RK) records.
+    pieces = []
+    nitems = len(cell_items)
+    i = 0
+    while i < nitems:
+        icolx, icell = cell_items[i]
+        if isinstance(icell, NumberCell):
+            isRK, value = icell.get_encoded_data()
+            if not isRK:
+                pieces.append(value) # pre-packed NUMBER record
+                i += 1
+                continue
+            muldata = [(value, icell.xf_idx)]
+            target = NumberCell
+        elif isinstance(icell, BlankCell):
+            muldata = [icell.xf_idx]
+            target = BlankCell
+        else:
+            pieces.append(icell.get_biff_data())
+            i += 1
+            continue
+        lastcolx = icolx
+        j = i
+        packed_record = ''
+        for j in xrange(i+1, nitems):
+            jcolx, jcell = cell_items[j]
+            if jcolx != lastcolx + 1:
+                nexti = j
+                break
+            if not isinstance(jcell, target):
+                nexti = j
+                break
+            if target == NumberCell:
+                isRK, value = jcell.get_encoded_data()
+                if not isRK:
+                    packed_record = value
+                    nexti = j + 1
+                    break
+                muldata.append((value, jcell.xf_idx))
+            else:
+                muldata.append(jcell.xf_idx)
+            lastcolx = jcolx
+        else:
+            nexti = j + 1
+        if target == NumberCell:
+            if lastcolx == icolx:
+                # RK record
+                value, xf_idx = muldata[0]
+                pieces.append(pack('<5Hi', 0x027E, 10, rowx, icolx, xf_idx, value))
+            else:
+                # MULRK record
+                nc = lastcolx - icolx + 1
+                pieces.append(pack('<4H', 0x00BD, 6 * nc + 6, rowx, icolx))
+                pieces.append(''.join([pack('<Hi', xf_idx, value) for value, xf_idx in muldata]))
+                pieces.append(pack('<H', lastcolx))
+        else:
+            if lastcolx == icolx:
+                # BLANK record
+                xf_idx = muldata[0]
+                pieces.append(pack('<5H', 0x0201, 6, rowx, icolx, xf_idx))
+            else:
+                # MULBLANK record
+                nc = lastcolx - icolx + 1
+                pieces.append(pack('<4H', 0x00BE, 2 * nc + 6, rowx, icolx))
+                pieces.append(''.join([pack('<H', xf_idx) for xf_idx in muldata]))
+                pieces.append(pack('<H', lastcolx))
+        if packed_record:
+            pieces.append(packed_record)
+        i = nexti
+    return ''.join(pieces)
+
diff --git a/tablib/packages/xlwt/Column.py b/tablib/packages/xlwt/Column.py
new file mode 100644
index 0000000..aac35bf
--- /dev/null
+++ b/tablib/packages/xlwt/Column.py
@@ -0,0 +1,34 @@
+# -*- coding: windows-1252 -*-
+
+from BIFFRecords import ColInfoRecord
+
+class Column(object):
+    def __init__(self, colx, parent_sheet):
+        if not(isinstance(colx, int) and 0 <= colx <= 255):
+            raise ValueError("column index (%r) not an int in range(256)" % colx)
+        self._index = colx
+        self._parent = parent_sheet
+        self._parent_wb = parent_sheet.get_parent()
+        self._xf_index = 0x0F
+
+        self.width = 0x0B92
+        self.hidden = 0
+        self.level = 0
+        self.collapse = 0
+
+    def set_style(self, style):
+        self._xf_index = self._parent_wb.add_style(style)
+
+    def width_in_pixels(self):
+        # *** Approximation ****
+        return int(round(self.width * 0.0272 + 0.446, 0))
+
+    def get_biff_record(self):
+        options =  (self.hidden & 0x01) << 0
+        options |= (self.level & 0x07) << 8
+        options |= (self.collapse & 0x01) << 12
+
+        return ColInfoRecord(self._index, self._index, self.width, self._xf_index, options).get()
+
+
+
diff --git a/tablib/packages/xlwt/CompoundDoc.py b/tablib/packages/xlwt/CompoundDoc.py
new file mode 100644
index 0000000..f60856b
--- /dev/null
+++ b/tablib/packages/xlwt/CompoundDoc.py
@@ -0,0 +1,516 @@
+# -*- coding: windows-1252 -*-
+
+import sys
+import struct
+
+class Reader:
+    def __init__(self, filename, dump = False):
+        self.dump = dump
+        self.STREAMS = {}
+
+        doc = file(filename, 'rb').read()
+        self.header, self.data = doc[0:512], doc[512:]
+        del doc
+
+        self.__build_header()
+        self.__build_MSAT()
+        self.__build_SAT()
+        self.__build_directory()
+        self.__build_short_sectors_data()
+        
+        if len(self.short_sectors_data) > 0:
+            self.__build_SSAT()
+        else:
+            if self.dump and (self.total_ssat_sectors != 0 or self.ssat_start_sid != -2):
+                print 'NOTE: header says that must be', self.total_ssat_sectors, 'short sectors'
+                print 'NOTE: starting at', self.ssat_start_sid, 'sector'
+                print 'NOTE: but file does not contains data in short sectors'
+            self.ssat_start_sid = -2
+            self.total_ssat_sectors = 0
+            self.SSAT = [-2]
+
+        for dentry in self.dir_entry_list[1:]:
+            (did, 
+             sz, name, 
+             t, c, 
+             did_left, did_right, did_root, 
+             dentry_start_sid, 
+             stream_size
+            ) = dentry
+            stream_data = ''
+            if stream_size > 0:
+                if stream_size >= self.min_stream_size:
+                    args = (self.data, self.SAT, dentry_start_sid, self.sect_size)
+                else:
+                    args = (self.short_sectors_data, self.SSAT, dentry_start_sid, self.short_sect_size)
+                stream_data = self.get_stream_data(*args)
+
+            if name != '':
+                # BAD IDEA: names may be equal. NEED use full paths...
+                self.STREAMS[name] = stream_data
+
+    
+    def __build_header(self):
+        self.doc_magic             = self.header[0:8]
+
+        if self.doc_magic != '\xD0\xCF\x11\xE0\xA1\xB1\x1A\xE1':
+            raise Exception, 'Not an OLE file.'
+
+        self.file_uid              = self.header[8:24]
+        self.rev_num               = self.header[24:26]
+        self.ver_num               = self.header[26:28]
+        self.byte_order            = self.header[28:30]
+        self.log2_sect_size,       = struct.unpack('<H', self.header[30:32])
+        self.log2_short_sect_size, = struct.unpack('<H', self.header[32:34])
+        self.total_sat_sectors,    = struct.unpack('<L', self.header[44:48])
+        self.dir_start_sid,        = struct.unpack('<l', self.header[48:52])
+        self.min_stream_size,      = struct.unpack('<L', self.header[56:60])
+        self.ssat_start_sid,       = struct.unpack('<l', self.header[60:64])
+        self.total_ssat_sectors,   = struct.unpack('<L', self.header[64:68])
+        self.msat_start_sid,       = struct.unpack('<l', self.header[68:72])
+        self.total_msat_sectors,   = struct.unpack('<L', self.header[72:76])
+         
+        self.sect_size        = 1 << self.log2_sect_size
+        self.short_sect_size  = 1 << self.log2_short_sect_size
+
+        if self.dump:
+            print 'file magic: '
+            print_bin_data(self.doc_magic)
+
+            print 'file uid: '
+            print_bin_data(self.file_uid)
+
+            print 'revision number: '
+            print_bin_data(self.rev_num)
+         
+            print 'version number: '
+            print_bin_data(self.ver_num)
+            
+            print 'byte order: '
+            print_bin_data(self.byte_order)
+            
+            print 'sector size                                :', hex(self.sect_size), self.sect_size
+            #print 'total sectors in file                      :', hex(self.total_sectors), self.total_sectors
+            print 'short sector size                          :', hex(self.short_sect_size), self.short_sect_size
+            print 'Total number of sectors used for the SAT   :', hex(self.total_sat_sectors), self.total_sat_sectors
+            print 'SID of first sector of the directory stream:', hex(self.dir_start_sid), self.dir_start_sid
+            print 'Minimum size of a standard stream          :', hex(self.min_stream_size), self.min_stream_size
+            print 'SID of first sector of the SSAT            :', hex(self.ssat_start_sid), self.ssat_start_sid
+            print 'Total number of sectors used for the SSAT  :', hex(self.total_ssat_sectors), self.total_ssat_sectors
+            print 'SID of first additional sector of the MSAT :', hex(self.msat_start_sid), self.msat_start_sid
+            print 'Total number of sectors used for the MSAT  :', hex(self.total_msat_sectors), self.total_msat_sectors
+
+
+    def __build_MSAT(self):
+        self.MSAT = list(struct.unpack('<109l', self.header[76:]))
+        
+        next = self.msat_start_sid
+        while next > 0:
+           msat_sector = struct.unpack('<128l', self.data[next*self.sect_size:(next+1)*self.sect_size])
+           self.MSAT.extend(msat_sector[:127])
+           next = msat_sector[-1]
+
+        if self.dump:
+            print 'MSAT (header part): \n', self.MSAT[:109]
+            print 'additional MSAT sectors: \n', self.MSAT[109:]
+
+
+    def __build_SAT(self):
+        sat_stream = ''.join([self.data[i*self.sect_size:(i+1)*self.sect_size] for i in self.MSAT if i >= 0])
+
+        sat_sids_count = len(sat_stream) >> 2
+        self.SAT = struct.unpack('<%dl' % sat_sids_count, sat_stream) # SIDs tuple
+
+        if self.dump:
+            print 'SAT sid count:\n', sat_sids_count
+            print 'SAT content:\n', self.SAT
+
+
+    def __build_SSAT(self):
+        ssat_stream = self.get_stream_data(self.data, self.SAT, self.ssat_start_sid, self.sect_size)
+
+        ssids_count = len(ssat_stream) >> 2
+        self.SSAT = struct.unpack('<%dl' % ssids_count, ssat_stream)
+
+        if self.dump:
+            print 'SSID count:', ssids_count
+            print 'SSAT content:\n', self.SSAT
+
+
+    def __build_directory(self):
+        dir_stream = self.get_stream_data(self.data, self.SAT, self.dir_start_sid, self.sect_size)
+
+        self.dir_entry_list = []
+
+        i = 0
+        while i < len(dir_stream):
+            dentry = dir_stream[i:i+128] # 128 -- dir entry size
+            i += 128
+            
+            did = len(self.dir_entry_list)
+            sz, = struct.unpack('<H', dentry[64:66])
+            if sz > 0 :
+                name = dentry[0:sz-2].decode('utf_16_le', 'replace')
+            else:
+                name = u''
+            t,  = struct.unpack('B', dentry[66])
+            c,  = struct.unpack('B', dentry[67])
+            did_left ,  = struct.unpack('<l', dentry[68:72])
+            did_right ,  = struct.unpack('<l', dentry[72:76])
+            did_root ,  = struct.unpack('<l', dentry[76:80])
+            dentry_start_sid ,  = struct.unpack('<l', dentry[116:120])
+            stream_size ,  = struct.unpack('<L', dentry[120:124])
+
+            self.dir_entry_list.extend([(did, sz, name, t, c, 
+                                            did_left, did_right, did_root, 
+                                            dentry_start_sid, stream_size)]) 
+
+        if self.dump:
+            dentry_types = {
+                0x00: 'Empty',
+                0x01: 'User storage',
+                0x02: 'User stream',
+                0x03: 'LockBytes',
+                0x04: 'Property',
+                0x05: 'Root storage'
+            }
+            node_colours = {
+                0x00: 'Red',
+                0x01: 'Black'
+            }
+            print 'total directory entries:', len(self.dir_entry_list)
+
+            for dentry in self.dir_entry_list:
+                (did, sz, name, t, c, 
+                 did_left, did_right, did_root, 
+                 dentry_start_sid, stream_size) = dentry
+                print 'DID', did
+                print 'Size of the used area of the character buffer of the name:', sz
+                print 'dir entry name:', repr(name)
+                print 'type of entry:', t, dentry_types[t]
+                print 'entry colour:', c, node_colours[c]
+                print 'left child DID :', did_left
+                print 'right child DID:', did_right
+                print 'root DID       :', did_root
+                print 'start SID       :', dentry_start_sid
+                print 'stream size     :', stream_size
+                if stream_size == 0:
+                    print 'stream is empty'
+                elif stream_size >= self.min_stream_size:
+                    print 'stream stored as normal stream'
+                else:
+                    print 'stream stored as short-stream'
+
+    
+    def __build_short_sectors_data(self):
+        (did, sz, name, t, c, 
+         did_left, did_right, did_root, 
+         dentry_start_sid, stream_size) = self.dir_entry_list[0]
+        assert t == 0x05 # Short-Stream Container Stream (SSCS) resides in Root Storage
+        if stream_size == 0:
+            self.short_sectors_data = ''
+        else:
+            self.short_sectors_data = self.get_stream_data(self.data, self.SAT, dentry_start_sid, self.sect_size)
+
+
+    def get_stream_data(self, data, SAT, start_sid, sect_size):
+        sid = start_sid
+        chunks = [(sid, sid)]
+        stream_data = ''
+
+        while SAT[sid] >= 0:
+            next_in_chain = SAT[sid]
+            last_chunk_start, last_chunk_finish = chunks[-1]
+            if next_in_chain == last_chunk_finish + 1:
+                chunks[-1] = last_chunk_start, next_in_chain
+            else:
+                chunks.extend([(next_in_chain, next_in_chain)]) 
+            sid = next_in_chain
+        for s, f in chunks:
+            stream_data += data[s*sect_size:(f+1)*sect_size]
+        #print chunks
+        return stream_data
+
+        
+def print_bin_data(data):
+    i = 0
+    while i < len(data):
+        j = 0
+        while (i < len(data)) and (j < 16):
+            c = '0x%02X' % ord(data[i])
+            sys.stdout.write(c)
+            sys.stdout.write(' ')
+            i += 1
+            j += 1
+        print
+    if i == 0:
+        print '<NO DATA>'
+
+
+
+# This implementation writes only 'Root Entry', 'Workbook' streams
+# and 2 empty streams for aligning directory stream on sector boundary
+# 
+# LAYOUT:
+# 0         header
+# 76                MSAT (1st part: 109 SID)
+# 512       workbook stream
+# ...       additional MSAT sectors if streams' size > about 7 Mb == (109*512 * 128)
+# ...       SAT
+# ...       directory stream
+#
+# NOTE: this layout is "ad hoc". It can be more general. RTFM
+
+class XlsDoc:
+    SECTOR_SIZE = 0x0200
+    MIN_LIMIT   = 0x1000
+
+    SID_FREE_SECTOR  = -1
+    SID_END_OF_CHAIN = -2
+    SID_USED_BY_SAT  = -3
+    SID_USED_BY_MSAT = -4
+
+    def __init__(self):
+        #self.book_stream = ''                # padded
+        self.book_stream_sect = []
+
+        self.dir_stream = ''
+        self.dir_stream_sect = []
+
+        self.packed_SAT = ''
+        self.SAT_sect = []
+
+        self.packed_MSAT_1st = ''
+        self.packed_MSAT_2nd = ''
+        self.MSAT_sect_2nd = []
+
+        self.header = ''
+
+    def __build_directory(self): # align on sector boundary
+        self.dir_stream = ''
+
+        dentry_name      = '\x00'.join('Root Entry\x00') + '\x00'
+        dentry_name_sz   = len(dentry_name)
+        dentry_name_pad  = '\x00'*(64 - dentry_name_sz)
+        dentry_type      = 0x05 # root storage
+        dentry_colour    = 0x01 # black
+        dentry_did_left  = -1
+        dentry_did_right = -1
+        dentry_did_root  = 1
+        dentry_start_sid = -2
+        dentry_stream_sz = 0
+
+        self.dir_stream += struct.pack('<64s H 2B 3l 9L l L L',
+           dentry_name + dentry_name_pad,
+           dentry_name_sz,
+           dentry_type,
+           dentry_colour,
+           dentry_did_left, 
+           dentry_did_right,
+           dentry_did_root,
+           0, 0, 0, 0, 0, 0, 0, 0, 0,
+           dentry_start_sid,
+           dentry_stream_sz,
+           0
+        )
+
+        dentry_name      = '\x00'.join('Workbook\x00') + '\x00'
+        dentry_name_sz   = len(dentry_name)
+        dentry_name_pad  = '\x00'*(64 - dentry_name_sz)
+        dentry_type      = 0x02 # user stream
+        dentry_colour    = 0x01 # black
+        dentry_did_left  = -1
+        dentry_did_right = -1
+        dentry_did_root  = -1
+        dentry_start_sid = 0     
+        dentry_stream_sz = self.book_stream_len
+
+        self.dir_stream += struct.pack('<64s H 2B 3l 9L l L L',
+           dentry_name + dentry_name_pad,
+           dentry_name_sz,
+           dentry_type,
+           dentry_colour,
+           dentry_did_left, 
+           dentry_did_right,
+           dentry_did_root,
+           0, 0, 0, 0, 0, 0, 0, 0, 0, 
+           dentry_start_sid,
+           dentry_stream_sz,
+           0
+        )
+        
+        # padding
+        dentry_name      = ''
+        dentry_name_sz   = len(dentry_name)
+        dentry_name_pad  = '\x00'*(64 - dentry_name_sz)
+        dentry_type      = 0x00 # empty
+        dentry_colour    = 0x01 # black
+        dentry_did_left  = -1
+        dentry_did_right = -1
+        dentry_did_root  = -1
+        dentry_start_sid = -2
+        dentry_stream_sz = 0
+
+        self.dir_stream += struct.pack('<64s H 2B 3l 9L l L L',
+           dentry_name + dentry_name_pad,
+           dentry_name_sz,
+           dentry_type,
+           dentry_colour,
+           dentry_did_left, 
+           dentry_did_right,
+           dentry_did_root,
+           0, 0, 0, 0, 0, 0, 0, 0, 0,
+           dentry_start_sid,
+           dentry_stream_sz,
+           0
+        ) * 2
+    
+    def __build_sat(self):
+        # Build SAT
+        book_sect_count = self.book_stream_len >> 9
+        dir_sect_count  = len(self.dir_stream) >> 9
+        
+        total_sect_count     = book_sect_count + dir_sect_count
+        SAT_sect_count       = 0
+        MSAT_sect_count      = 0
+        SAT_sect_count_limit = 109
+        while total_sect_count > 128*SAT_sect_count or SAT_sect_count > SAT_sect_count_limit:
+            SAT_sect_count   += 1
+            total_sect_count += 1
+            if SAT_sect_count > SAT_sect_count_limit:
+                MSAT_sect_count      += 1
+                total_sect_count     += 1
+                SAT_sect_count_limit += 127
+
+
+        SAT = [self.SID_FREE_SECTOR]*128*SAT_sect_count
+
+        sect = 0
+        while sect < book_sect_count - 1:
+            self.book_stream_sect.append(sect)
+            SAT[sect] = sect + 1
+            sect += 1
+        self.book_stream_sect.append(sect)
+        SAT[sect] = self.SID_END_OF_CHAIN
+        sect += 1
+
+        while sect < book_sect_count + MSAT_sect_count:
+            self.MSAT_sect_2nd.append(sect)
+            SAT[sect] = self.SID_USED_BY_MSAT
+            sect += 1
+
+        while sect < book_sect_count + MSAT_sect_count + SAT_sect_count:
+            self.SAT_sect.append(sect)            
+            SAT[sect] = self.SID_USED_BY_SAT
+            sect += 1
+
+        while sect < book_sect_count + MSAT_sect_count + SAT_sect_count + dir_sect_count - 1:
+            self.dir_stream_sect.append(sect)
+            SAT[sect] = sect + 1
+            sect += 1
+        self.dir_stream_sect.append(sect)
+        SAT[sect] = self.SID_END_OF_CHAIN
+        sect += 1
+
+        self.packed_SAT = struct.pack('<%dl' % (SAT_sect_count*128), *SAT)
+
+        MSAT_1st = [self.SID_FREE_SECTOR]*109
+        for i, SAT_sect_num in zip(range(0, 109), self.SAT_sect):
+            MSAT_1st[i] = SAT_sect_num
+        self.packed_MSAT_1st = struct.pack('<109l', *MSAT_1st)
+
+        MSAT_2nd = [self.SID_FREE_SECTOR]*128*MSAT_sect_count
+        if MSAT_sect_count > 0:
+            MSAT_2nd[- 1] = self.SID_END_OF_CHAIN
+
+        i = 109
+        msat_sect = 0
+        sid_num = 0
+        while i < SAT_sect_count:
+            if (sid_num + 1) % 128 == 0:
+                #print 'link: ',
+                msat_sect += 1
+                if msat_sect < len(self.MSAT_sect_2nd):
+                    MSAT_2nd[sid_num] = self.MSAT_sect_2nd[msat_sect]
+            else:
+                #print 'sid: ',
+                MSAT_2nd[sid_num] = self.SAT_sect[i]
+                i += 1
+            #print sid_num, MSAT_2nd[sid_num]
+            sid_num += 1
+
+        self.packed_MSAT_2nd = struct.pack('<%dl' % (MSAT_sect_count*128), *MSAT_2nd)
+
+        #print vars()
+        #print zip(range(0, sect), SAT)
+        #print self.book_stream_sect
+        #print self.MSAT_sect_2nd
+        #print MSAT_2nd
+        #print self.SAT_sect
+        #print self.dir_stream_sect
+
+
+    def __build_header(self):
+        doc_magic             = '\xD0\xCF\x11\xE0\xA1\xB1\x1A\xE1'
+        file_uid              = '\x00'*16
+        rev_num               = '\x3E\x00'
+        ver_num               = '\x03\x00'
+        byte_order            = '\xFE\xFF'
+        log_sect_size         = struct.pack('<H', 9)
+        log_short_sect_size   = struct.pack('<H', 6)
+        not_used0             = '\x00'*10
+        total_sat_sectors     = struct.pack('<L', len(self.SAT_sect))
+        dir_start_sid         = struct.pack('<l', self.dir_stream_sect[0])
+        not_used1             = '\x00'*4        
+        min_stream_size       = struct.pack('<L', 0x1000)
+        ssat_start_sid        = struct.pack('<l', -2)
+        total_ssat_sectors    = struct.pack('<L', 0)
+
+        if len(self.MSAT_sect_2nd) == 0:
+            msat_start_sid        = struct.pack('<l', -2)
+        else:
+            msat_start_sid        = struct.pack('<l', self.MSAT_sect_2nd[0])
+
+        total_msat_sectors    = struct.pack('<L', len(self.MSAT_sect_2nd))
+
+        self.header =       ''.join([  doc_magic,
+                                        file_uid,
+                                        rev_num,
+                                        ver_num,
+                                        byte_order,
+                                        log_sect_size,
+                                        log_short_sect_size,
+                                        not_used0,
+                                        total_sat_sectors,
+                                        dir_start_sid,
+                                        not_used1,
+                                        min_stream_size,
+                                        ssat_start_sid,
+                                        total_ssat_sectors,
+                                        msat_start_sid,
+                                        total_msat_sectors
+                                    ])
+                                        
+
+    def save(self, file_name_or_filelike_obj, stream):
+        # 1. Align stream on 0x1000 boundary (and therefore on sector boundary)
+        padding = '\x00' * (0x1000 - (len(stream) % 0x1000))
+        self.book_stream_len = len(stream) + len(padding)
+
+        self.__build_directory()
+        self.__build_sat()
+        self.__build_header()
+        
+        f = file_name_or_filelike_obj
+        we_own_it = not hasattr(f, 'write')
+        if we_own_it:
+            f = open(file_name_or_filelike_obj, 'wb')
+        f.write(self.header)
+        f.write(self.packed_MSAT_1st)
+        f.write(stream)
+        f.write(padding)
+        f.write(self.packed_MSAT_2nd)
+        f.write(self.packed_SAT)
+        f.write(self.dir_stream)
+        if we_own_it:
+            f.close()
diff --git a/tablib/packages/xlwt/ExcelFormula.py b/tablib/packages/xlwt/ExcelFormula.py
new file mode 100644
index 0000000..698d970
--- /dev/null
+++ b/tablib/packages/xlwt/ExcelFormula.py
@@ -0,0 +1,43 @@
+# -*- coding: windows-1252 -*-
+
+import ExcelFormulaParser, ExcelFormulaLexer
+import struct
+from antlr import ANTLRException
+
+
+class Formula(object):
+    __slots__ = ["__init__",  "__s", "__parser", "__sheet_refs", "__xcall_refs"]
+
+
+    def __init__(self, s):
+        try:
+            self.__s = s
+            lexer = ExcelFormulaLexer.Lexer(s)
+            self.__parser = ExcelFormulaParser.Parser(lexer)
+            self.__parser.formula()
+            self.__sheet_refs = self.__parser.sheet_references
+            self.__xcall_refs = self.__parser.xcall_references
+        except ANTLRException, e:
+            # print e
+            raise ExcelFormulaParser.FormulaParseException, "can't parse formula " + s
+
+    def get_references(self):
+        return self.__sheet_refs, self.__xcall_refs
+
+    def patch_references(self, patches):
+        for offset, idx in patches:
+            self.__parser.rpn = self.__parser.rpn[:offset] + struct.pack('<H', idx) + self.__parser.rpn[offset+2:]
+
+    def text(self):
+        return self.__s
+
+    def rpn(self):
+        '''
+        Offset    Size    Contents
+        0         2       Size of the following formula data (sz)
+        2         sz      Formula data (RPN token array)
+        [2+sz]    var.    (optional) Additional data for specific tokens
+
+        '''
+        return struct.pack("<H", len(self.__parser.rpn)) + self.__parser.rpn
+
diff --git a/tablib/packages/xlwt/ExcelFormulaLexer.py b/tablib/packages/xlwt/ExcelFormulaLexer.py
new file mode 100644
index 0000000..91d999f
--- /dev/null
+++ b/tablib/packages/xlwt/ExcelFormulaLexer.py
@@ -0,0 +1,128 @@
+# -*- coding: windows-1252 -*-
+
+import sys
+from antlr import EOF, CommonToken as Tok, TokenStream, TokenStreamException
+import struct
+import ExcelFormulaParser
+from re import compile as recompile, match, LOCALE, UNICODE, IGNORECASE, VERBOSE
+
+
+int_const_pattern = r"\d+\b"
+flt_const_pattern = r"""
+    (?:
+        (?: \d* \. \d+ ) # .1 .12 .123 etc 9.1 etc 98.1 etc
+        |
+        (?: \d+ \. ) # 1. 12. 123. etc
+    )
+    # followed by optional exponent part
+    (?: [Ee] [+-]? \d+ ) ?
+    """
+str_const_pattern = r'"(?:[^"]|"")*"'
+#range2d_pattern   = recompile(r"\$?[A-I]?[A-Z]\$?\d+:\$?[A-I]?[A-Z]\$?\d+"
+ref2d_r1c1_pattern = r"[Rr]0*[1-9][0-9]*[Cc]0*[1-9][0-9]*"
+ref2d_pattern     = r"\$?[A-I]?[A-Z]\$?0*[1-9][0-9]*"
+true_pattern      = r"TRUE\b"
+false_pattern     = r"FALSE\b"
+if_pattern        = r"IF\b"
+choose_pattern    = r"CHOOSE\b"
+name_pattern      = r"\w[\.\w]*"
+quotename_pattern = r"'(?:[^']|'')*'" #### It's essential that this bracket be non-grouping.
+ne_pattern        = r"<>"
+ge_pattern        = r">="
+le_pattern        = r"<="
+
+pattern_type_tuples = (
+    (flt_const_pattern, ExcelFormulaParser.NUM_CONST),
+    (int_const_pattern, ExcelFormulaParser.INT_CONST),
+    (str_const_pattern, ExcelFormulaParser.STR_CONST),
+#    (range2d_pattern  , ExcelFormulaParser.RANGE2D),
+    (ref2d_r1c1_pattern, ExcelFormulaParser.REF2D_R1C1),
+    (ref2d_pattern    , ExcelFormulaParser.REF2D),
+    (true_pattern     , ExcelFormulaParser.TRUE_CONST),
+    (false_pattern    , ExcelFormulaParser.FALSE_CONST),
+    (if_pattern       , ExcelFormulaParser.FUNC_IF),
+    (choose_pattern   , ExcelFormulaParser.FUNC_CHOOSE),
+    (name_pattern     , ExcelFormulaParser.NAME),
+    (quotename_pattern, ExcelFormulaParser.QUOTENAME),
+    (ne_pattern,        ExcelFormulaParser.NE),
+    (ge_pattern,        ExcelFormulaParser.GE),
+    (le_pattern,        ExcelFormulaParser.LE),
+)
+
+_re = recompile(
+    '(' + ')|('.join([i[0] for i in pattern_type_tuples]) + ')',
+    VERBOSE+LOCALE+IGNORECASE)
+
+_toktype = [None] + [i[1] for i in pattern_type_tuples]
+# need dummy at start because re.MatchObject.lastindex counts from 1
+
+single_char_lookup = {
+    '=': ExcelFormulaParser.EQ,
+    '<': ExcelFormulaParser.LT,
+    '>': ExcelFormulaParser.GT,
+    '+': ExcelFormulaParser.ADD,
+    '-': ExcelFormulaParser.SUB,
+    '*': ExcelFormulaParser.MUL,
+    '/': ExcelFormulaParser.DIV,
+    ':': ExcelFormulaParser.COLON,
+    ';': ExcelFormulaParser.SEMICOLON,
+    ',': ExcelFormulaParser.COMMA,
+    '(': ExcelFormulaParser.LP,
+    ')': ExcelFormulaParser.RP,
+    '&': ExcelFormulaParser.CONCAT,
+    '%': ExcelFormulaParser.PERCENT,
+    '^': ExcelFormulaParser.POWER,
+    '!': ExcelFormulaParser.BANG,
+    }
+
+class Lexer(TokenStream):
+    def __init__(self, text):
+        self._text = text[:]
+        self._pos = 0
+        self._line = 0
+
+    def isEOF(self):
+        return len(self._text) <= self._pos
+
+    def curr_ch(self):
+        return self._text[self._pos]
+
+    def next_ch(self, n = 1):
+        self._pos += n
+
+    def is_whitespace(self):
+        return self.curr_ch() in " \t\n\r\f\v"
+
+    def match_pattern(self):
+        m = _re.match(self._text, self._pos)
+        if not m:
+            return None
+        self._pos = m.end(0)
+        return Tok(type = _toktype[m.lastindex], text = m.group(0), col = m.start(0) + 1)
+
+    def nextToken(self):
+        # skip whitespace
+        while not self.isEOF() and self.is_whitespace():
+            self.next_ch()
+        if self.isEOF():
+            return Tok(type = EOF)
+        # first, try to match token with 2 or more chars
+        t = self.match_pattern()
+        if t:
+            return t
+        # second, we want 1-char tokens
+        te = self.curr_ch()
+        try:
+            ty = single_char_lookup[te]
+        except KeyError:
+            raise TokenStreamException(
+                "Unexpected char %r in column %u." % (self.curr_ch(), self._pos))
+        self.next_ch()
+        return Tok(type=ty, text=te, col=self._pos)
+
+if __name__ == '__main__':
+    try:
+        for t in Lexer(""" 1.23 456 "abcd" R2C2 a1 iv65536 true false if choose a_name 'qname' <> >= <= """):
+            print t
+    except TokenStreamException, e:
+        print "error:", e
diff --git a/tablib/packages/xlwt/ExcelFormulaParser.py b/tablib/packages/xlwt/ExcelFormulaParser.py
new file mode 100644
index 0000000..000a8a0
--- /dev/null
+++ b/tablib/packages/xlwt/ExcelFormulaParser.py
@@ -0,0 +1,677 @@
+### $ANTLR 2.7.7 (20060930): "xlwt/excel-formula.g" -> "ExcelFormulaParser.py"$
+### import antlr and other modules ..
+import sys
+import antlr
+
+version = sys.version.split()[0]
+if version < '2.2.1':
+    False = 0
+if version < '2.3':
+    True = not False
+### header action >>>
+import struct
+import Utils
+from UnicodeUtils import upack1
+from ExcelMagic import *
+
+_RVAdelta =     {"R": 0, "V": 0x20, "A": 0x40}
+_RVAdeltaRef =  {"R": 0, "V": 0x20, "A": 0x40, "D": 0x20}
+_RVAdeltaArea = {"R": 0, "V": 0x20, "A": 0x40, "D": 0}
+
+
+class FormulaParseException(Exception):
+   """
+   An exception indicating that a Formula could not be successfully parsed.
+   """
+### header action <<<
+### preamble action>>>
+
+### preamble action <<<
+
+### import antlr.Token
+from antlr import Token
+### >>>The Known Token Types <<<
+SKIP                = antlr.SKIP
+INVALID_TYPE        = antlr.INVALID_TYPE
+EOF_TYPE            = antlr.EOF_TYPE
+EOF                 = antlr.EOF
+NULL_TREE_LOOKAHEAD = antlr.NULL_TREE_LOOKAHEAD
+MIN_USER_TYPE       = antlr.MIN_USER_TYPE
+TRUE_CONST = 4
+FALSE_CONST = 5
+STR_CONST = 6
+NUM_CONST = 7
+INT_CONST = 8
+FUNC_IF = 9
+FUNC_CHOOSE = 10
+NAME = 11
+QUOTENAME = 12
+EQ = 13
+NE = 14
+GT = 15
+LT = 16
+GE = 17
+LE = 18
+ADD = 19
+SUB = 20
+MUL = 21
+DIV = 22
+POWER = 23
+PERCENT = 24
+LP = 25
+RP = 26
+LB = 27
+RB = 28
+COLON = 29
+COMMA = 30
+SEMICOLON = 31
+REF2D = 32
+REF2D_R1C1 = 33
+BANG = 34
+CONCAT = 35
+
+class Parser(antlr.LLkParser):
+    ### user action >>>
+    ### user action <<<
+
+    def __init__(self, *args, **kwargs):
+        antlr.LLkParser.__init__(self, *args, **kwargs)
+        self.tokenNames = _tokenNames
+        ### __init__ header action >>>
+        self.rpn = ""
+        self.sheet_references = []
+        self.xcall_references = []
+        ### __init__ header action <<<
+
+    def formula(self):
+
+        pass
+        self.expr("V")
+
+    def expr(self,
+        arg_type
+    ):
+
+        pass
+        self.prec0_expr(arg_type)
+        while True:
+            if ((self.LA(1) >= EQ and self.LA(1) <= LE)):
+                pass
+                la1 = self.LA(1)
+                if False:
+                    pass
+                elif la1 and la1 in [EQ]:
+                    pass
+                    self.match(EQ)
+                    op = struct.pack('B', ptgEQ)
+                elif la1 and la1 in [NE]:
+                    pass
+                    self.match(NE)
+                    op = struct.pack('B', ptgNE)
+                elif la1 and la1 in [GT]:
+                    pass
+                    self.match(GT)
+                    op = struct.pack('B', ptgGT)
+                elif la1 and la1 in [LT]:
+                    pass
+                    self.match(LT)
+                    op = struct.pack('B', ptgLT)
+                elif la1 and la1 in [GE]:
+                    pass
+                    self.match(GE)
+                    op = struct.pack('B', ptgGE)
+                elif la1 and la1 in [LE]:
+                    pass
+                    self.match(LE)
+                    op = struct.pack('B', ptgLE)
+                else:
+                        raise antlr.NoViableAltException(self.LT(1), self.getFilename())
+
+                self.prec0_expr(arg_type)
+                self.rpn += op
+            else:
+                break
+
+
+    def prec0_expr(self,
+        arg_type
+    ):
+
+        pass
+        self.prec1_expr(arg_type)
+        while True:
+            if (self.LA(1)==CONCAT):
+                pass
+                pass
+                self.match(CONCAT)
+                op = struct.pack('B', ptgConcat)
+                self.prec1_expr(arg_type)
+                self.rpn += op
+            else:
+                break
+
+
+    def prec1_expr(self,
+        arg_type
+    ):
+
+        pass
+        self.prec2_expr(arg_type)
+        while True:
+            if (self.LA(1)==ADD or self.LA(1)==SUB):
+                pass
+                la1 = self.LA(1)
+                if False:
+                    pass
+                elif la1 and la1 in [ADD]:
+                    pass
+                    self.match(ADD)
+                    op = struct.pack('B', ptgAdd)
+                elif la1 and la1 in [SUB]:
+                    pass
+                    self.match(SUB)
+                    op = struct.pack('B', ptgSub)
+                else:
+                        raise antlr.NoViableAltException(self.LT(1), self.getFilename())
+
+                self.prec2_expr(arg_type)
+                self.rpn += op;
+                          # print "**prec1_expr4 %s" % arg_type
+            else:
+                break
+
+
+    def prec2_expr(self,
+        arg_type
+    ):
+
+        pass
+        self.prec3_expr(arg_type)
+        while True:
+            if (self.LA(1)==MUL or self.LA(1)==DIV):
+                pass
+                la1 = self.LA(1)
+                if False:
+                    pass
+                elif la1 and la1 in [MUL]:
+                    pass
+                    self.match(MUL)
+                    op = struct.pack('B', ptgMul)
+                elif la1 and la1 in [DIV]:
+                    pass
+                    self.match(DIV)
+                    op = struct.pack('B', ptgDiv)
+                else:
+                        raise antlr.NoViableAltException(self.LT(1), self.getFilename())
+
+                self.prec3_expr(arg_type)
+                self.rpn += op
+            else:
+                break
+
+
+    def prec3_expr(self,
+        arg_type
+    ):
+
+        pass
+        self.prec4_expr(arg_type)
+        while True:
+            if (self.LA(1)==POWER):
+                pass
+                pass
+                self.match(POWER)
+                op = struct.pack('B', ptgPower)
+                self.prec4_expr(arg_type)
+                self.rpn += op
+            else:
+                break
+
+
+    def prec4_expr(self,
+        arg_type
+    ):
+
+        pass
+        self.prec5_expr(arg_type)
+        la1 = self.LA(1)
+        if False:
+            pass
+        elif la1 and la1 in [PERCENT]:
+            pass
+            self.match(PERCENT)
+            self.rpn += struct.pack('B', ptgPercent)
+        elif la1 and la1 in [EOF,EQ,NE,GT,LT,GE,LE,ADD,SUB,MUL,DIV,POWER,RP,COMMA,SEMICOLON,CONCAT]:
+            pass
+        else:
+                raise antlr.NoViableAltException(self.LT(1), self.getFilename())
+
+
+    def prec5_expr(self,
+        arg_type
+    ):
+
+        la1 = self.LA(1)
+        if False:
+            pass
+        elif la1 and la1 in [TRUE_CONST,FALSE_CONST,STR_CONST,NUM_CONST,INT_CONST,FUNC_IF,FUNC_CHOOSE,NAME,QUOTENAME,LP,REF2D]:
+            pass
+            self.primary(arg_type)
+        elif la1 and la1 in [SUB]:
+            pass
+            self.match(SUB)
+            self.primary(arg_type)
+            self.rpn += struct.pack('B', ptgUminus)
+        else:
+                raise antlr.NoViableAltException(self.LT(1), self.getFilename())
+
+
+    def primary(self,
+        arg_type
+    ):
+
+        str_tok = None
+        int_tok = None
+        num_tok = None
+        ref2d_tok = None
+        ref2d1_tok = None
+        ref2d2_tok = None
+        ref3d_ref2d = None
+        ref3d_ref2d2 = None
+        name_tok = None
+        func_tok = None
+        la1 = self.LA(1)
+        if False:
+            pass
+        elif la1 and la1 in [TRUE_CONST]:
+            pass
+            self.match(TRUE_CONST)
+            self.rpn += struct.pack("2B", ptgBool, 1)
+        elif la1 and la1 in [FALSE_CONST]:
+            pass
+            self.match(FALSE_CONST)
+            self.rpn += struct.pack("2B", ptgBool, 0)
+        elif la1 and la1 in [STR_CONST]:
+            pass
+            str_tok = self.LT(1)
+            self.match(STR_CONST)
+            self.rpn += struct.pack("B", ptgStr) + upack1(str_tok.text[1:-1].replace("\"\"", "\""))
+        elif la1 and la1 in [NUM_CONST]:
+            pass
+            num_tok = self.LT(1)
+            self.match(NUM_CONST)
+            self.rpn += struct.pack("<Bd", ptgNum, float(num_tok.text))
+        elif la1 and la1 in [FUNC_IF]:
+            pass
+            self.match(FUNC_IF)
+            self.match(LP)
+            self.expr("V")
+            la1 = self.LA(1)
+            if False:
+                pass
+            elif la1 and la1 in [SEMICOLON]:
+                pass
+                self.match(SEMICOLON)
+            elif la1 and la1 in [COMMA]:
+                pass
+                self.match(COMMA)
+            else:
+                    raise antlr.NoViableAltException(self.LT(1), self.getFilename())
+
+            self.rpn += struct.pack("<BBH", ptgAttr, 0x02, 0) # tAttrIf
+            pos0 = len(self.rpn) - 2
+            self.expr(arg_type)
+            la1 = self.LA(1)
+            if False:
+                pass
+            elif la1 and la1 in [SEMICOLON]:
+                pass
+                self.match(SEMICOLON)
+            elif la1 and la1 in [COMMA]:
+                pass
+                self.match(COMMA)
+            else:
+                    raise antlr.NoViableAltException(self.LT(1), self.getFilename())
+
+            self.rpn += struct.pack("<BBH", ptgAttr, 0x08, 0) # tAttrSkip
+            pos1 = len(self.rpn) - 2
+            self.rpn = self.rpn[:pos0] + struct.pack("<H", pos1-pos0) + self.rpn[pos0+2:]
+            self.expr(arg_type)
+            self.match(RP)
+            self.rpn += struct.pack("<BBH", ptgAttr, 0x08, 3) # tAttrSkip
+            self.rpn += struct.pack("<BBH", ptgFuncVarR, 3, 1) # 3 = nargs, 1 = IF func
+            pos2 = len(self.rpn)
+            self.rpn = self.rpn[:pos1] + struct.pack("<H", pos2-(pos1+2)-1) + self.rpn[pos1+2:]
+        elif la1 and la1 in [FUNC_CHOOSE]:
+            pass
+            self.match(FUNC_CHOOSE)
+            arg_type = "R"
+            rpn_chunks = []
+            self.match(LP)
+            self.expr("V")
+            rpn_start = len(self.rpn)
+            ref_markers = [len(self.sheet_references)]
+            while True:
+                if (self.LA(1)==COMMA or self.LA(1)==SEMICOLON):
+                    pass
+                    la1 = self.LA(1)
+                    if False:
+                        pass
+                    elif la1 and la1 in [SEMICOLON]:
+                        pass
+                        self.match(SEMICOLON)
+                    elif la1 and la1 in [COMMA]:
+                        pass
+                        self.match(COMMA)
+                    else:
+                            raise antlr.NoViableAltException(self.LT(1), self.getFilename())
+
+                    mark = len(self.rpn)
+                    la1 = self.LA(1)
+                    if False:
+                        pass
+                    elif la1 and la1 in [TRUE_CONST,FALSE_CONST,STR_CONST,NUM_CONST,INT_CONST,FUNC_IF,FUNC_CHOOSE,NAME,QUOTENAME,SUB,LP,REF2D]:
+                        pass
+                        self.expr(arg_type)
+                    elif la1 and la1 in [RP,COMMA,SEMICOLON]:
+                        pass
+                        self.rpn += struct.pack("B", ptgMissArg)
+                    else:
+                            raise antlr.NoViableAltException(self.LT(1), self.getFilename())
+
+                    rpn_chunks.append(self.rpn[mark:])
+                    ref_markers.append(len(self.sheet_references))
+                else:
+                    break
+
+            self.match(RP)
+            self.rpn = self.rpn[:rpn_start]
+            nc = len(rpn_chunks)
+            chunklens = [len(chunk) for chunk in rpn_chunks]
+            skiplens = [0] * nc
+            skiplens[-1] = 3
+            for ic in xrange(nc-1, 0, -1):
+               skiplens[ic-1] = skiplens[ic] + chunklens[ic] + 4
+            jump_pos = [2 * nc + 2]
+            for ic in xrange(nc):
+               jump_pos.append(jump_pos[-1] + chunklens[ic] + 4)
+            chunk_shift = 2 * nc + 6 # size of tAttrChoose
+            for ic in xrange(nc):
+               for refx in xrange(ref_markers[ic], ref_markers[ic+1]):
+                   ref = self.sheet_references[refx]
+                   self.sheet_references[refx] = (ref[0], ref[1], ref[2] + chunk_shift)
+               chunk_shift += 4 # size of tAttrSkip
+            choose_rpn = []
+            choose_rpn.append(struct.pack("<BBH", ptgAttr, 0x04, nc)) # 0x04 is tAttrChoose
+            choose_rpn.append(struct.pack("<%dH" % (nc+1), *jump_pos))
+            for ic in xrange(nc):
+               choose_rpn.append(rpn_chunks[ic])
+               choose_rpn.append(struct.pack("<BBH", ptgAttr, 0x08, skiplens[ic])) # 0x08 is tAttrSkip
+            choose_rpn.append(struct.pack("<BBH", ptgFuncVarV, nc+1, 100)) # 100 is CHOOSE fn
+            self.rpn += "".join(choose_rpn)
+        elif la1 and la1 in [LP]:
+            pass
+            self.match(LP)
+            self.expr(arg_type)
+            self.match(RP)
+            self.rpn += struct.pack("B", ptgParen)
+        else:
+            if (self.LA(1)==INT_CONST) and (_tokenSet_0.member(self.LA(2))):
+                pass
+                int_tok = self.LT(1)
+                self.match(INT_CONST)
+                # print "**int_const", int_tok.text
+                int_value = int(int_tok.text)
+                if int_value <= 65535:
+                   self.rpn += struct.pack("<BH", ptgInt, int_value)
+                else:
+                   self.rpn += struct.pack("<Bd", ptgNum, float(int_value))
+            elif (self.LA(1)==REF2D) and (_tokenSet_0.member(self.LA(2))):
+                pass
+                ref2d_tok = self.LT(1)
+                self.match(REF2D)
+                # print "**ref2d %s %s" % (ref2d_tok.text, arg_type)
+                r, c = Utils.cell_to_packed_rowcol(ref2d_tok.text)
+                ptg = ptgRefR + _RVAdeltaRef[arg_type]
+                self.rpn += struct.pack("<B2H", ptg, r, c)
+            elif (self.LA(1)==REF2D) and (self.LA(2)==COLON):
+                pass
+                ref2d1_tok = self.LT(1)
+                self.match(REF2D)
+                self.match(COLON)
+                ref2d2_tok = self.LT(1)
+                self.match(REF2D)
+                r1, c1 = Utils.cell_to_packed_rowcol(ref2d1_tok.text)
+                r2, c2 = Utils.cell_to_packed_rowcol(ref2d2_tok.text)
+                ptg = ptgAreaR + _RVAdeltaArea[arg_type]
+                self.rpn += struct.pack("<B4H", ptg, r1, r2, c1, c2)
+            elif (self.LA(1)==INT_CONST or self.LA(1)==NAME or self.LA(1)==QUOTENAME) and (self.LA(2)==COLON or self.LA(2)==BANG):
+                pass
+                sheet1=self.sheet()
+                sheet2 = sheet1
+                la1 = self.LA(1)
+                if False:
+                    pass
+                elif la1 and la1 in [COLON]:
+                    pass
+                    self.match(COLON)
+                    sheet2=self.sheet()
+                elif la1 and la1 in [BANG]:
+                    pass
+                else:
+                        raise antlr.NoViableAltException(self.LT(1), self.getFilename())
+
+                self.match(BANG)
+                ref3d_ref2d = self.LT(1)
+                self.match(REF2D)
+                ptg = ptgRef3dR + _RVAdeltaRef[arg_type]
+                rpn_ref2d = ""
+                r1, c1 = Utils.cell_to_packed_rowcol(ref3d_ref2d.text)
+                rpn_ref2d = struct.pack("<3H", 0x0000, r1, c1)
+                la1 = self.LA(1)
+                if False:
+                    pass
+                elif la1 and la1 in [COLON]:
+                    pass
+                    self.match(COLON)
+                    ref3d_ref2d2 = self.LT(1)
+                    self.match(REF2D)
+                    ptg = ptgArea3dR + _RVAdeltaArea[arg_type]
+                    r2, c2 = Utils.cell_to_packed_rowcol(ref3d_ref2d2.text)
+                    rpn_ref2d = struct.pack("<5H", 0x0000, r1, r2, c1, c2)
+                elif la1 and la1 in [EOF,EQ,NE,GT,LT,GE,LE,ADD,SUB,MUL,DIV,POWER,PERCENT,RP,COMMA,SEMICOLON,CONCAT]:
+                    pass
+                else:
+                        raise antlr.NoViableAltException(self.LT(1), self.getFilename())
+
+                self.rpn += struct.pack("<B", ptg)
+                self.sheet_references.append((sheet1, sheet2, len(self.rpn)))
+                self.rpn += rpn_ref2d
+            elif (self.LA(1)==NAME) and (_tokenSet_0.member(self.LA(2))):
+                pass
+                name_tok = self.LT(1)
+                self.match(NAME)
+                raise Exception("[formula] found unexpected NAME token (%r)" % name_tok.txt)
+                # #### TODO: handle references to defined names here
+            elif (self.LA(1)==NAME) and (self.LA(2)==LP):
+                pass
+                func_tok = self.LT(1)
+                self.match(NAME)
+                func_toku = func_tok.text.upper()
+                if func_toku in all_funcs_by_name:
+                   (opcode,
+                   min_argc,
+                   max_argc,
+                   func_type,
+                   arg_type_str) = all_funcs_by_name[func_toku]
+                   arg_type_list = list(arg_type_str)
+                else:
+                   raise Exception("[formula] unknown function (%s)" % func_tok.text)
+                # print "**func_tok1 %s %s" % (func_toku, func_type)
+                xcall = opcode < 0
+                if xcall:
+                   # The name of the add-in function is passed as the 1st arg
+                   # of the hidden XCALL function
+                   self.xcall_references.append((func_toku, len(self.rpn) + 1))
+                   self.rpn += struct.pack("<BHHH",
+                       ptgNameXR,
+                       0xadde, # ##PATCHME## index to REF entry in EXTERNSHEET record
+                       0xefbe, # ##PATCHME## one-based index to EXTERNNAME record
+                       0x0000) # unused
+                self.match(LP)
+                arg_count=self.expr_list(arg_type_list, min_argc, max_argc)
+                self.match(RP)
+                if arg_count > max_argc or arg_count < min_argc:
+                   raise Exception, "%d parameters for function: %s" % (arg_count, func_tok.text)
+                if xcall:
+                   func_ptg = ptgFuncVarR + _RVAdelta[func_type]
+                   self.rpn += struct.pack("<2BH", func_ptg, arg_count + 1, 255) # 255 is magic XCALL function
+                elif min_argc == max_argc:
+                   func_ptg = ptgFuncR + _RVAdelta[func_type]
+                   self.rpn += struct.pack("<BH", func_ptg, opcode)
+                elif arg_count == 1 and func_tok.text.upper() == "SUM":
+                   self.rpn += struct.pack("<BBH", ptgAttr, 0x10, 0) # tAttrSum
+                else:
+                   func_ptg = ptgFuncVarR + _RVAdelta[func_type]
+                   self.rpn += struct.pack("<2BH", func_ptg, arg_count, opcode)
+            else:
+                raise antlr.NoViableAltException(self.LT(1), self.getFilename())
+
+
+    def sheet(self):
+        ref = None
+
+        sheet_ref_name = None
+        sheet_ref_int = None
+        sheet_ref_quote = None
+        la1 = self.LA(1)
+        if False:
+            pass
+        elif la1 and la1 in [NAME]:
+            pass
+            sheet_ref_name = self.LT(1)
+            self.match(NAME)
+            ref = sheet_ref_name.text
+        elif la1 and la1 in [INT_CONST]:
+            pass
+            sheet_ref_int = self.LT(1)
+            self.match(INT_CONST)
+            ref = sheet_ref_int.text
+        elif la1 and la1 in [QUOTENAME]:
+            pass
+            sheet_ref_quote = self.LT(1)
+            self.match(QUOTENAME)
+            ref = sheet_ref_quote.text[1:-1].replace("''", "'")
+        else:
+                raise antlr.NoViableAltException(self.LT(1), self.getFilename())
+
+        return ref
+
+    def expr_list(self,
+        arg_type_list, min_argc, max_argc
+    ):
+        arg_cnt = None
+
+        arg_cnt = 0
+        arg_type = arg_type_list[arg_cnt]
+        # print "**expr_list1[%d] req=%s" % (arg_cnt, arg_type)
+        la1 = self.LA(1)
+        if False:
+            pass
+        elif la1 and la1 in [TRUE_CONST,FALSE_CONST,STR_CONST,NUM_CONST,INT_CONST,FUNC_IF,FUNC_CHOOSE,NAME,QUOTENAME,SUB,LP,REF2D]:
+            pass
+            self.expr(arg_type)
+            arg_cnt += 1
+            while True:
+                if (self.LA(1)==COMMA or self.LA(1)==SEMICOLON):
+                    pass
+                    if arg_cnt < len(arg_type_list):
+                       arg_type = arg_type_list[arg_cnt]
+                    else:
+                       arg_type = arg_type_list[-1]
+                    if arg_type == "+":
+                       arg_type = arg_type_list[-2]
+                    # print "**expr_list2[%d] req=%s" % (arg_cnt, arg_type)
+                    la1 = self.LA(1)
+                    if False:
+                        pass
+                    elif la1 and la1 in [SEMICOLON]:
+                        pass
+                        self.match(SEMICOLON)
+                    elif la1 and la1 in [COMMA]:
+                        pass
+                        self.match(COMMA)
+                    else:
+                            raise antlr.NoViableAltException(self.LT(1), self.getFilename())
+
+                    la1 = self.LA(1)
+                    if False:
+                        pass
+                    elif la1 and la1 in [TRUE_CONST,FALSE_CONST,STR_CONST,NUM_CONST,INT_CONST,FUNC_IF,FUNC_CHOOSE,NAME,QUOTENAME,SUB,LP,REF2D]:
+                        pass
+                        self.expr(arg_type)
+                    elif la1 and la1 in [RP,COMMA,SEMICOLON]:
+                        pass
+                        self.rpn += struct.pack("B", ptgMissArg)
+                    else:
+                            raise antlr.NoViableAltException(self.LT(1), self.getFilename())
+
+                    arg_cnt += 1
+                else:
+                    break
+
+        elif la1 and la1 in [RP]:
+            pass
+        else:
+                raise antlr.NoViableAltException(self.LT(1), self.getFilename())
+
+        return arg_cnt
+
+
+_tokenNames = [
+    "<0>",
+    "EOF",
+    "<2>",
+    "NULL_TREE_LOOKAHEAD",
+    "TRUE_CONST",
+    "FALSE_CONST",
+    "STR_CONST",
+    "NUM_CONST",
+    "INT_CONST",
+    "FUNC_IF",
+    "FUNC_CHOOSE",
+    "NAME",
+    "QUOTENAME",
+    "EQ",
+    "NE",
+    "GT",
+    "LT",
+    "GE",
+    "LE",
+    "ADD",
+    "SUB",
+    "MUL",
+    "DIV",
+    "POWER",
+    "PERCENT",
+    "LP",
+    "RP",
+    "LB",
+    "RB",
+    "COLON",
+    "COMMA",
+    "SEMICOLON",
+    "REF2D",
+    "REF2D_R1C1",
+    "BANG",
+    "CONCAT"
+]
+
+
+### generate bit set
+def mk_tokenSet_0():
+    ### var1
+    data = [ 37681618946L, 0L]
+    return data
+_tokenSet_0 = antlr.BitSet(mk_tokenSet_0())
+
diff --git a/tablib/packages/xlwt/ExcelMagic.py b/tablib/packages/xlwt/ExcelMagic.py
new file mode 100644
index 0000000..a49ae1f
--- /dev/null
+++ b/tablib/packages/xlwt/ExcelMagic.py
@@ -0,0 +1,862 @@
+# -*- coding: ascii -*-
+"""
+lots of Excel Magic Numbers
+"""
+
+# Boundaries BIFF8+
+
+MAX_ROW = 65536
+MAX_COL = 256
+
+
+biff_records = {
+    0x0000: "DIMENSIONS",
+    0x0001: "BLANK",
+    0x0002: "INTEGER",
+    0x0003: "NUMBER",
+    0x0004: "LABEL",
+    0x0005: "BOOLERR",
+    0x0006: "FORMULA",
+    0x0007: "STRING",
+    0x0008: "ROW",
+    0x0009: "BOF",
+    0x000A: "EOF",
+    0x000B: "INDEX",
+    0x000C: "CALCCOUNT",
+    0x000D: "CALCMODE",
+    0x000E: "PRECISION",
+    0x000F: "REFMODE",
+    0x0010: "DELTA",
+    0x0011: "ITERATION",
+    0x0012: "PROTECT",
+    0x0013: "PASSWORD",
+    0x0014: "HEADER",
+    0x0015: "FOOTER",
+    0x0016: "EXTERNCOUNT",
+    0x0017: "EXTERNSHEET",
+    0x0018: "NAME",
+    0x0019: "WINDOWPROTECT",
+    0x001A: "VERTICALPAGEBREAKS",
+    0x001B: "HORIZONTALPAGEBREAKS",
+    0x001C: "NOTE",
+    0x001D: "SELECTION",
+    0x001E: "FORMAT",
+    0x001F: "FORMATCOUNT",
+    0x0020: "COLUMNDEFAULT",
+    0x0021: "ARRAY",
+    0x0022: "1904",
+    0x0023: "EXTERNNAME",
+    0x0024: "COLWIDTH",
+    0x0025: "DEFAULTROWHEIGHT",
+    0x0026: "LEFTMARGIN",
+    0x0027: "RIGHTMARGIN",
+    0x0028: "TOPMARGIN",
+    0x0029: "BOTTOMMARGIN",
+    0x002A: "PRINTHEADERS",
+    0x002B: "PRINTGRIDLINES",
+    0x002F: "FILEPASS",
+    0x0031: "FONT",
+    0x0036: "TABLE",
+    0x003C: "CONTINUE",
+    0x003D: "WINDOW1",
+    0x003E: "WINDOW2",
+    0x0040: "BACKUP",
+    0x0041: "PANE",
+    0x0042: "CODEPAGE",
+    0x0043: "XF",
+    0x0044: "IXFE",
+    0x0045: "EFONT",
+    0x004D: "PLS",
+    0x0050: "DCON",
+    0x0051: "DCONREF",
+    0x0053: "DCONNAME",
+    0x0055: "DEFCOLWIDTH",
+    0x0056: "BUILTINFMTCNT",
+    0x0059: "XCT",
+    0x005A: "CRN",
+    0x005B: "FILESHARING",
+    0x005C: "WRITEACCESS",
+    0x005D: "OBJ",
+    0x005E: "UNCALCED",
+    0x005F: "SAFERECALC",
+    0x0060: "TEMPLATE",
+    0x0063: "OBJPROTECT",
+    0x007D: "COLINFO",
+    0x007E: "RK",
+    0x007F: "IMDATA",
+    0x0080: "GUTS",
+    0x0081: "WSBOOL",
+    0x0082: "GRIDSET",
+    0x0083: "HCENTER",
+    0x0084: "VCENTER",
+    0x0085: "BOUNDSHEET",
+    0x0086: "WRITEPROT",
+    0x0087: "ADDIN",
+    0x0088: "EDG",
+    0x0089: "PUB",
+    0x008C: "COUNTRY",
+    0x008D: "HIDEOBJ",
+    0x008E: "BUNDLESOFFSET",
+    0x008F: "BUNDLEHEADER",
+    0x0090: "SORT",
+    0x0091: "SUB",
+    0x0092: "PALETTE",
+    0x0093: "STYLE",
+    0x0094: "LHRECORD",
+    0x0095: "LHNGRAPH",
+    0x0096: "SOUND",
+    0x0098: "LPR",
+    0x0099: "STANDARDWIDTH",
+    0x009A: "FNGROUPNAME",
+    0x009B: "FILTERMODE",
+    0x009C: "FNGROUPCOUNT",
+    0x009D: "AUTOFILTERINFO",
+    0x009E: "AUTOFILTER",
+    0x00A0: "SCL",
+    0x00A1: "SETUP",
+    0x00A9: "COORDLIST",
+    0x00AB: "GCW",
+    0x00AE: "SCENMAN",
+    0x00AF: "SCENARIO",
+    0x00B0: "SXVIEW",
+    0x00B1: "SXVD",
+    0x00B2: "SXVI",
+    0x00B4: "SXIVD",
+    0x00B5: "SXLI",
+    0x00B6: "SXPI",
+    0x00B8: "DOCROUTE",
+    0x00B9: "RECIPNAME",
+    0x00BC: "SHRFMLA",
+    0x00BD: "MULRK",
+    0x00BE: "MULBLANK",
+    0x00C1: "MMS",
+    0x00C2: "ADDMENU",
+    0x00C3: "DELMENU",
+    0x00C5: "SXDI",
+    0x00C6: "SXDB",
+    0x00C7: "SXFIELD",
+    0x00C8: "SXINDEXLIST",
+    0x00C9: "SXDOUBLE",
+    0x00CD: "SXSTRING",
+    0x00CE: "SXDATETIME",
+    0x00D0: "SXTBL",
+    0x00D1: "SXTBRGITEM",
+    0x00D2: "SXTBPG",
+    0x00D3: "OBPROJ",
+    0x00D5: "SXIDSTM",
+    0x00D6: "RSTRING",
+    0x00D7: "DBCELL",
+    0x00DA: "BOOKBOOL",
+    0x00DC: "SXEXT|PARAMQRY",
+    0x00DD: "SCENPROTECT",
+    0x00DE: "OLESIZE",
+    0x00DF: "UDDESC",
+    0x00E0: "XF",
+    0x00E1: "INTERFACEHDR",
+    0x00E2: "INTERFACEEND",
+    0x00E3: "SXVS",
+    0x00E5: "MERGEDCELLS",
+    0x00E9: "BITMAP",
+    0x00EB: "MSODRAWINGGROUP",
+    0x00EC: "MSODRAWING",
+    0x00ED: "MSODRAWINGSELECTION",
+    0x00F0: "SXRULE",
+    0x00F1: "SXEX",
+    0x00F2: "SXFILT",
+    0x00F6: "SXNAME",
+    0x00F7: "SXSELECT",
+    0x00F8: "SXPAIR",
+    0x00F9: "SXFMLA",
+    0x00FB: "SXFORMAT",
+    0x00FC: "SST",
+    0x00FD: "LABELSST",
+    0x00FF: "EXTSST",
+    0x0100: "SXVDEX",
+    0x0103: "SXFORMULA",
+    0x0122: "SXDBEX",
+    0x0137: "CHTRINSERT",
+    0x0138: "CHTRINFO",
+    0x013B: "CHTRCELLCONTENT",
+    0x013D: "TABID",
+    0x0140: "CHTRMOVERANGE",
+    0x014D: "CHTRINSERTTAB",
+    0x015F: "LABELRANGES",
+    0x0160: "USESELFS",
+    0x0161: "DSF",
+    0x0162: "XL5MODIFY",
+    0x0196: "CHTRHEADER",
+    0x01A9: "USERBVIEW",
+    0x01AA: "USERSVIEWBEGIN",
+    0x01AB: "USERSVIEWEND",
+    0x01AD: "QSI",
+    0x01AE: "SUPBOOK",
+    0x01AF: "PROT4REV",
+    0x01B0: "CONDFMT",
+    0x01B1: "CF",
+    0x01B2: "DVAL",
+    0x01B5: "DCONBIN",
+    0x01B6: "TXO",
+    0x01B7: "REFRESHALL",
+    0x01B8: "HLINK",
+    0x01BA: "CODENAME",
+    0x01BB: "SXFDBTYPE",
+    0x01BC: "PROT4REVPASS",
+    0x01BE: "DV",
+    0x01C0: "XL9FILE",
+    0x01C1: "RECALCID",
+    0x0200: "DIMENSIONS",
+    0x0201: "BLANK",
+    0x0203: "NUMBER",
+    0x0204: "LABEL",
+    0x0205: "BOOLERR",
+    0x0206: "FORMULA",
+    0x0207: "STRING",
+    0x0208: "ROW",
+    0x0209: "BOF",
+    0x020B: "INDEX",
+    0x0218: "NAME",
+    0x0221: "ARRAY",
+    0x0223: "EXTERNNAME",
+    0x0225: "DEFAULTROWHEIGHT",
+    0x0231: "FONT",
+    0x0236: "TABLE",
+    0x023E: "WINDOW2",
+    0x0243: "XF",
+    0x027E: "RK",
+    0x0293: "STYLE",
+    0x0406: "FORMULA",
+    0x0409: "BOF",
+    0x041E: "FORMAT",
+    0x0443: "XF",
+    0x04BC: "SHRFMLA",
+    0x0800: "SCREENTIP",
+    0x0803: "WEBQRYSETTINGS",
+    0x0804: "WEBQRYTABLES",
+    0x0809: "BOF",
+    0x0862: "SHEETLAYOUT",
+    0x0867: "SHEETPROTECTION",
+    0x1001: "UNITS",
+    0x1002: "ChartChart",
+    0x1003: "ChartSeries",
+    0x1006: "ChartDataformat",
+    0x1007: "ChartLineformat",
+    0x1009: "ChartMarkerformat",
+    0x100A: "ChartAreaformat",
+    0x100B: "ChartPieformat",
+    0x100C: "ChartAttachedlabel",
+    0x100D: "ChartSeriestext",
+    0x1014: "ChartChartformat",
+    0x1015: "ChartLegend",
+    0x1016: "ChartSerieslist",
+    0x1017: "ChartBar",
+    0x1018: "ChartLine",
+    0x1019: "ChartPie",
+    0x101A: "ChartArea",
+    0x101B: "ChartScatter",
+    0x101C: "ChartChartline",
+    0x101D: "ChartAxis",
+    0x101E: "ChartTick",
+    0x101F: "ChartValuerange",
+    0x1020: "ChartCatserrange",
+    0x1021: "ChartAxislineformat",
+    0x1022: "ChartFormatlink",
+    0x1024: "ChartDefaulttext",
+    0x1025: "ChartText",
+    0x1026: "ChartFontx",
+    0x1027: "ChartObjectLink",
+    0x1032: "ChartFrame",
+    0x1033: "BEGIN",
+    0x1034: "END",
+    0x1035: "ChartPlotarea",
+    0x103A: "Chart3D",
+    0x103C: "ChartPicf",
+    0x103D: "ChartDropbar",
+    0x103E: "ChartRadar",
+    0x103F: "ChartSurface",
+    0x1040: "ChartRadararea",
+    0x1041: "ChartAxisparent",
+    0x1043: "ChartLegendxn",
+    0x1044: "ChartShtprops",
+    0x1045: "ChartSertocrt",
+    0x1046: "ChartAxesused",
+    0x1048: "ChartSbaseref",
+    0x104A: "ChartSerparent",
+    0x104B: "ChartSerauxtrend",
+    0x104E: "ChartIfmt",
+    0x104F: "ChartPos",
+    0x1050: "ChartAlruns",
+    0x1051: "ChartAI",
+    0x105B: "ChartSerauxerrbar",
+    0x105D: "ChartSerfmt",
+    0x105F: "Chart3DDataFormat",
+    0x1060: "ChartFbi",
+    0x1061: "ChartBoppop",
+    0x1062: "ChartAxcext",
+    0x1063: "ChartDat",
+    0x1064: "ChartPlotgrowth",
+    0x1065: "ChartSiindex",
+    0x1066: "ChartGelframe",
+    0x1067: "ChartBoppcustom",
+    0xFFFF: ""
+}
+
+
+all_funcs_by_name = {
+    # Includes Analysis ToolPak aka ATP aka add-in aka xcall functions,
+    # distinguished by -ve opcode.
+    # name: (opcode, min # args, max # args, func return type, func arg types)
+    # + in func arg types means more of the same.
+    'ABS'         : ( 24, 1,  1, 'V', 'V'),
+    'ACCRINT'     : ( -1, 6,  7, 'V', 'VVVVVVV'),
+    'ACCRINTM'    : ( -1, 3,  5, 'V', 'VVVVV'),
+    'ACOS'        : ( 99, 1,  1, 'V', 'V'),
+    'ACOSH'       : (233, 1,  1, 'V', 'V'),
+    'ADDRESS'     : (219, 2,  5, 'V', 'VVVVV'),
+    'AMORDEGRC'   : ( -1, 7,  7, 'V', 'VVVVVVV'),
+    'AMORLINC'    : ( -1, 7,  7, 'V', 'VVVVVVV'),
+    'AND'         : ( 36, 1, 30, 'V', 'D+'),
+    'AREAS'       : ( 75, 1,  1, 'V', 'R'),
+    'ASC'         : (214, 1,  1, 'V', 'V'),
+    'ASIN'        : ( 98, 1,  1, 'V', 'V'),
+    'ASINH'       : (232, 1,  1, 'V', 'V'),
+    'ATAN'        : ( 18, 1,  1, 'V', 'V'),
+    'ATAN2'       : ( 97, 2,  2, 'V', 'VV'),
+    'ATANH'       : (234, 1,  1, 'V', 'V'),
+    'AVEDEV'      : (269, 1, 30, 'V', 'D+'),
+    'AVERAGE'     : (  5, 1, 30, 'V', 'D+'),
+    'AVERAGEA'    : (361, 1, 30, 'V', 'D+'),
+    'BAHTTEXT'    : (368, 1,  1, 'V', 'V'),
+    'BESSELI'     : ( -1, 2,  2, 'V', 'VV'),
+    'BESSELJ'     : ( -1, 2,  2, 'V', 'VV'),
+    'BESSELK'     : ( -1, 2,  2, 'V', 'VV'),
+    'BESSELY'     : ( -1, 2,  2, 'V', 'VV'),
+    'BETADIST'    : (270, 3,  5, 'V', 'VVVVV'),
+    'BETAINV'     : (272, 3,  5, 'V', 'VVVVV'),
+    'BIN2DEC'     : ( -1, 1,  1, 'V', 'V'),
+    'BIN2HEX'     : ( -1, 1,  2, 'V', 'VV'),
+    'BIN2OCT'     : ( -1, 1,  2, 'V', 'VV'),
+    'BINOMDIST'   : (273, 4,  4, 'V', 'VVVV'),
+    'CEILING'     : (288, 2,  2, 'V', 'VV'),
+    'CELL'        : (125, 1,  2, 'V', 'VR'),
+    'CHAR'        : (111, 1,  1, 'V', 'V'),
+    'CHIDIST'     : (274, 2,  2, 'V', 'VV'),
+    'CHIINV'      : (275, 2,  2, 'V', 'VV'),
+    'CHITEST'     : (306, 2,  2, 'V', 'AA'),
+    'CHOOSE'      : (100, 2, 30, 'R', 'VR+'),
+    'CLEAN'       : (162, 1,  1, 'V', 'V'),
+    'CODE'        : (121, 1,  1, 'V', 'V'),
+    'COLUMN'      : (  9, 0,  1, 'V', 'R'),
+    'COLUMNS'     : ( 77, 1,  1, 'V', 'R'),
+    'COMBIN'      : (276, 2,  2, 'V', 'VV'),
+    'COMPLEX'     : ( -1, 2,  3, 'V', 'VVV'),
+    'CONCATENATE' : (336, 1, 30, 'V', 'V+'),
+    'CONFIDENCE'  : (277, 3,  3, 'V', 'VVV'),
+    'CONVERT'     : ( -1, 3,  3, 'V', 'VVV'),
+    'CORREL'      : (307, 2,  2, 'V', 'AA'),
+    'COS'         : ( 16, 1,  1, 'V', 'V'),
+    'COSH'        : (230, 1,  1, 'V', 'V'),
+    'COUNT'       : (  0, 1, 30, 'V', 'D+'),
+    'COUNTA'      : (169, 1, 30, 'V', 'D+'),
+    'COUNTBLANK'  : (347, 1,  1, 'V', 'R'),
+    'COUNTIF'     : (346, 2,  2, 'V', 'RV'),
+    'COUPDAYBS'   : ( -1, 3,  5, 'V', 'VVVVV'),
+    'COUPDAYS'    : ( -1, 3,  5, 'V', 'VVVVV'),
+    'COUPDAYSNC'  : ( -1, 3,  5, 'V', 'VVVVV'),
+    'COUPNCD'     : ( -1, 3,  5, 'V', 'VVVVV'),
+    'COUPNUM'     : ( -1, 3,  5, 'V', 'VVVVV'),
+    'COUPPCD'     : ( -1, 3,  5, 'V', 'VVVVV'),
+    'COVAR'       : (308, 2,  2, 'V', 'AA'),
+    'CRITBINOM'   : (278, 3,  3, 'V', 'VVV'),
+    'CUMIPMT'     : ( -1, 6,  6, 'V', 'VVVVVV'),
+    'CUMPRINC'    : ( -1, 6,  6, 'V', 'VVVVVV'),
+    'DATE'        : ( 65, 3,  3, 'V', 'VVV'),
+    'DATEDIF'     : (351, 3,  3, 'V', 'VVV'),
+    'DATEVALUE'   : (140, 1,  1, 'V', 'V'),
+    'DAVERAGE'    : ( 42, 3,  3, 'V', 'RRR'),
+    'DAY'         : ( 67, 1,  1, 'V', 'V'),
+    'DAYS360'     : (220, 2,  3, 'V', 'VVV'),
+    'DB'          : (247, 4,  5, 'V', 'VVVVV'),
+    'DBCS'        : (215, 1,  1, 'V', 'V'),
+    'DCOUNT'      : ( 40, 3,  3, 'V', 'RRR'),
+    'DCOUNTA'     : (199, 3,  3, 'V', 'RRR'),
+    'DDB'         : (144, 4,  5, 'V', 'VVVVV'),
+    'DEC2BIN'     : ( -1, 1,  2, 'V', 'VV'),
+    'DEC2HEX'     : ( -1, 1,  2, 'V', 'VV'),
+    'DEC2OCT'     : ( -1, 1,  2, 'V', 'VV'),
+    'DEGREES'     : (343, 1,  1, 'V', 'V'),
+    'DELTA'       : ( -1, 1,  2, 'V', 'VV'),
+    'DEVSQ'       : (318, 1, 30, 'V', 'D+'),
+    'DGET'        : (235, 3,  3, 'V', 'RRR'),
+    'DISC'        : ( -1, 4,  5, 'V', 'VVVVV'),
+    'DMAX'        : ( 44, 3,  3, 'V', 'RRR'),
+    'DMIN'        : ( 43, 3,  3, 'V', 'RRR'),
+    'DOLLAR'      : ( 13, 1,  2, 'V', 'VV'),
+    'DOLLARDE'    : ( -1, 2,  2, 'V', 'VV'),
+    'DOLLARFR'    : ( -1, 2,  2, 'V', 'VV'),
+    'DPRODUCT'    : (189, 3,  3, 'V', 'RRR'),
+    'DSTDEV'      : ( 45, 3,  3, 'V', 'RRR'),
+    'DSTDEVP'     : (195, 3,  3, 'V', 'RRR'),
+    'DSUM'        : ( 41, 3,  3, 'V', 'RRR'),
+    'DURATION'    : ( -1, 5,  6, 'V', 'VVVVVV'),
+    'DVAR'        : ( 47, 3,  3, 'V', 'RRR'),
+    'DVARP'       : (196, 3,  3, 'V', 'RRR'),
+    'EDATE'       : ( -1, 2,  2, 'V', 'VV'),
+    'EFFECT'      : ( -1, 2,  2, 'V', 'VV'),
+    'EOMONTH'     : ( -1, 1,  2, 'V', 'VV'),
+    'ERF'         : ( -1, 1,  2, 'V', 'VV'),
+    'ERFC'        : ( -1, 1,  1, 'V', 'V'),
+    'ERROR.TYPE'  : (261, 1,  1, 'V', 'V'),
+    'EVEN'        : (279, 1,  1, 'V', 'V'),
+    'EXACT'       : (117, 2,  2, 'V', 'VV'),
+    'EXP'         : ( 21, 1,  1, 'V', 'V'),
+    'EXPONDIST'   : (280, 3,  3, 'V', 'VVV'),
+    'FACT'        : (184, 1,  1, 'V', 'V'),
+    'FACTDOUBLE'  : ( -1, 1,  1, 'V', 'V'),
+    'FALSE'       : ( 35, 0,  0, 'V', '-'),
+    'FDIST'       : (281, 3,  3, 'V', 'VVV'),
+    'FIND'        : (124, 2,  3, 'V', 'VVV'),
+    'FINDB'       : (205, 2,  3, 'V', 'VVV'),
+    'FINV'        : (282, 3,  3, 'V', 'VVV'),
+    'FISHER'      : (283, 1,  1, 'V', 'V'),
+    'FISHERINV'   : (284, 1,  1, 'V', 'V'),
+    'FIXED'       : ( 14, 2,  3, 'V', 'VVV'),
+    'FLOOR'       : (285, 2,  2, 'V', 'VV'),
+    'FORECAST'    : (309, 3,  3, 'V', 'VAA'),
+    'FREQUENCY'   : (252, 2,  2, 'A', 'RR'),
+    'FTEST'       : (310, 2,  2, 'V', 'AA'),
+    'FV'          : ( 57, 3,  5, 'V', 'VVVVV'),
+    'FVSCHEDULE'  : ( -1, 2,  2, 'V', 'VA'),
+    'GAMMADIST'   : (286, 4,  4, 'V', 'VVVV'),
+    'GAMMAINV'    : (287, 3,  3, 'V', 'VVV'),
+    'GAMMALN'     : (271, 1,  1, 'V', 'V'),
+    'GCD'         : ( -1, 1, 29, 'V', 'V+'),
+    'GEOMEAN'     : (319, 1, 30, 'V', 'D+'),
+    'GESTEP'      : ( -1, 1,  2, 'V', 'VV'),
+    'GETPIVOTDATA': (358, 2, 30, 'A', 'VAV+'),
+    'GROWTH'      : ( 52, 1,  4, 'A', 'RRRV'),
+    'HARMEAN'     : (320, 1, 30, 'V', 'D+'),
+    'HEX2BIN'     : ( -1, 1,  2, 'V', 'VV'),
+    'HEX2DEC'     : ( -1, 1,  1, 'V', 'V'),
+    'HEX2OCT'     : ( -1, 1,  2, 'V', 'VV'),
+    'HLOOKUP'     : (101, 3,  4, 'V', 'VRRV'),
+    'HOUR'        : ( 71, 1,  1, 'V', 'V'),
+    'HYPERLINK'   : (359, 1,  2, 'V', 'VV'),
+    'HYPGEOMDIST' : (289, 4,  4, 'V', 'VVVV'),
+    'IF'          : (  1, 2,  3, 'R', 'VRR'),
+    'IMABS'       : ( -1, 1,  1, 'V', 'V'),
+    'IMAGINARY'   : ( -1, 1,  1, 'V', 'V'),
+    'IMARGUMENT'  : ( -1, 1,  1, 'V', 'V'),
+    'IMCONJUGATE' : ( -1, 1,  1, 'V', 'V'),
+    'IMCOS'       : ( -1, 1,  1, 'V', 'V'),
+    'IMDIV'       : ( -1, 2,  2, 'V', 'VV'),
+    'IMEXP'       : ( -1, 1,  1, 'V', 'V'),
+    'IMLN'        : ( -1, 1,  1, 'V', 'V'),
+    'IMLOG10'     : ( -1, 1,  1, 'V', 'V'),
+    'IMLOG2'      : ( -1, 1,  1, 'V', 'V'),
+    'IMPOWER'     : ( -1, 2,  2, 'V', 'VV'),
+    'IMPRODUCT'   : ( -1, 2,  2, 'V', 'VV'),
+    'IMREAL'      : ( -1, 1,  1, 'V', 'V'),
+    'IMSIN'       : ( -1, 1,  1, 'V', 'V'),
+    'IMSQRT'      : ( -1, 1,  1, 'V', 'V'),
+    'IMSUB'       : ( -1, 2,  2, 'V', 'VV'),
+    'IMSUM'       : ( -1, 1, 29, 'V', 'V+'),
+    'INDEX'       : ( 29, 2,  4, 'R', 'RVVV'),
+    'INDIRECT'    : (148, 1,  2, 'R', 'VV'),
+    'INFO'        : (244, 1,  1, 'V', 'V'),
+    'INT'         : ( 25, 1,  1, 'V', 'V'),
+    'INTERCEPT'   : (311, 2,  2, 'V', 'AA'),
+    'INTRATE'     : ( -1, 4,  5, 'V', 'VVVVV'),
+    'IPMT'        : (167, 4,  6, 'V', 'VVVVVV'),
+    'IRR'         : ( 62, 1,  2, 'V', 'RV'),
+    'ISBLANK'     : (129, 1,  1, 'V', 'V'),
+    'ISERR'       : (126, 1,  1, 'V', 'V'),
+    'ISERROR'     : (  3, 1,  1, 'V', 'V'),
+    'ISEVEN'      : ( -1, 1,  1, 'V', 'V'),
+    'ISLOGICAL'   : (198, 1,  1, 'V', 'V'),
+    'ISNA'        : (  2, 1,  1, 'V', 'V'),
+    'ISNONTEXT'   : (190, 1,  1, 'V', 'V'),
+    'ISNUMBER'    : (128, 1,  1, 'V', 'V'),
+    'ISODD'       : ( -1, 1,  1, 'V', 'V'),
+    'ISPMT'       : (350, 4,  4, 'V', 'VVVV'),
+    'ISREF'       : (105, 1,  1, 'V', 'R'),
+    'ISTEXT'      : (127, 1,  1, 'V', 'V'),
+    'KURT'        : (322, 1, 30, 'V', 'D+'),
+    'LARGE'       : (325, 2,  2, 'V', 'RV'),
+    'LCM'         : ( -1, 1, 29, 'V', 'V+'),
+    'LEFT'        : (115, 1,  2, 'V', 'VV'),
+    'LEFTB'       : (208, 1,  2, 'V', 'VV'),
+    'LEN'         : ( 32, 1,  1, 'V', 'V'),
+    'LENB'        : (211, 1,  1, 'V', 'V'),
+    'LINEST'      : ( 49, 1,  4, 'A', 'RRVV'),
+    'LN'          : ( 22, 1,  1, 'V', 'V'),
+    'LOG'         : (109, 1,  2, 'V', 'VV'),
+    'LOG10'       : ( 23, 1,  1, 'V', 'V'),
+    'LOGEST'      : ( 51, 1,  4, 'A', 'RRVV'),
+    'LOGINV'      : (291, 3,  3, 'V', 'VVV'),
+    'LOGNORMDIST' : (290, 3,  3, 'V', 'VVV'),
+    'LOOKUP'      : ( 28, 2,  3, 'V', 'VRR'),
+    'LOWER'       : (112, 1,  1, 'V', 'V'),
+    'MATCH'       : ( 64, 2,  3, 'V', 'VRR'),
+    'MAX'         : (  7, 1, 30, 'V', 'D+'),
+    'MAXA'        : (362, 1, 30, 'V', 'D+'),
+    'MDETERM'     : (163, 1,  1, 'V', 'A'),
+    'MDURATION'   : ( -1, 5,  6, 'V', 'VVVVVV'),
+    'MEDIAN'      : (227, 1, 30, 'V', 'D+'),
+    'MID'         : ( 31, 3,  3, 'V', 'VVV'),
+    'MIDB'        : (210, 3,  3, 'V', 'VVV'),
+    'MIN'         : (  6, 1, 30, 'V', 'D+'),
+    'MINA'        : (363, 1, 30, 'V', 'D+'),
+    'MINUTE'      : ( 72, 1,  1, 'V', 'V'),
+    'MINVERSE'    : (164, 1,  1, 'A', 'A'),
+    'MIRR'        : ( 61, 3,  3, 'V', 'RVV'),
+    'MMULT'       : (165, 2,  2, 'A', 'AA'),
+    'MOD'         : ( 39, 2,  2, 'V', 'VV'),
+    'MODE'        : (330, 1, 30, 'V', 'A+'), ################ weird #################
+    'MONTH'       : ( 68, 1,  1, 'V', 'V'),
+    'MROUND'      : ( -1, 2,  2, 'V', 'VV'),
+    'MULTINOMIAL' : ( -1, 1, 29, 'V', 'V+'),
+    'N'           : (131, 1,  1, 'V', 'R'),
+    'NA'          : ( 10, 0,  0, 'V', '-'),
+    'NEGBINOMDIST': (292, 3,  3, 'V', 'VVV'),
+    'NETWORKDAYS' : ( -1, 2,  3, 'V', 'VVR'),
+    'NOMINAL'     : ( -1, 2,  2, 'V', 'VV'),
+    'NORMDIST'    : (293, 4,  4, 'V', 'VVVV'),
+    'NORMINV'     : (295, 3,  3, 'V', 'VVV'),
+    'NORMSDIST'   : (294, 1,  1, 'V', 'V'),
+    'NORMSINV'    : (296, 1,  1, 'V', 'V'),
+    'NOT'         : ( 38, 1,  1, 'V', 'V'),
+    'NOW'         : ( 74, 0,  0, 'V', '-'),
+    'NPER'        : ( 58, 3,  5, 'V', 'VVVVV'),
+    'NPV'         : ( 11, 2, 30, 'V', 'VD+'),
+    'OCT2BIN'     : ( -1, 1,  2, 'V', 'VV'),
+    'OCT2DEC'     : ( -1, 1,  1, 'V', 'V'),
+    'OCT2HEX'     : ( -1, 1,  2, 'V', 'VV'),
+    'ODD'         : (298, 1,  1, 'V', 'V'),
+    'ODDFPRICE'   : ( -1, 9,  9, 'V', 'VVVVVVVVV'),
+    'ODDFYIELD'   : ( -1, 9,  9, 'V', 'VVVVVVVVV'),
+    'ODDLPRICE'   : ( -1, 8,  8, 'V', 'VVVVVVVV'),
+    'ODDLYIELD'   : ( -1, 8,  8, 'V', 'VVVVVVVV'),
+    'OFFSET'      : ( 78, 3,  5, 'R', 'RVVVV'),
+    'OR'          : ( 37, 1, 30, 'V', 'D+'),
+    'PEARSON'     : (312, 2,  2, 'V', 'AA'),
+    'PERCENTILE'  : (328, 2,  2, 'V', 'RV'),
+    'PERCENTRANK' : (329, 2,  3, 'V', 'RVV'),
+    'PERMUT'      : (299, 2,  2, 'V', 'VV'),
+    'PHONETIC'    : (360, 1,  1, 'V', 'R'),
+    'PI'          : ( 19, 0,  0, 'V', '-'),
+    'PMT'         : ( 59, 3,  5, 'V', 'VVVVV'),
+    'POISSON'     : (300, 3,  3, 'V', 'VVV'),
+    'POWER'       : (337, 2,  2, 'V', 'VV'),
+    'PPMT'        : (168, 4,  6, 'V', 'VVVVVV'),
+    'PRICE'       : ( -1, 6,  7, 'V', 'VVVVVVV'),
+    'PRICEDISC'   : ( -1, 4,  5, 'V', 'VVVVV'),
+    'PRICEMAT'    : ( -1, 5,  6, 'V', 'VVVVVV'),
+    'PROB'        : (317, 3,  4, 'V', 'AAVV'),
+    'PRODUCT'     : (183, 1, 30, 'V', 'D+'),
+    'PROPER'      : (114, 1,  1, 'V', 'V'),
+    'PV'          : ( 56, 3,  5, 'V', 'VVVVV'),
+    'QUARTILE'    : (327, 2,  2, 'V', 'RV'),
+    'QUOTIENT'    : ( -1, 2,  2, 'V', 'VV'),
+    'RADIANS'     : (342, 1,  1, 'V', 'V'),
+    'RAND'        : ( 63, 0,  0, 'V', '-'),
+    'RANDBETWEEN' : ( -1, 2,  2, 'V', 'VV'),
+    'RANK'        : (216, 2,  3, 'V', 'VRV'),
+    'RATE'        : ( 60, 3,  6, 'V', 'VVVVVV'),
+    'RECEIVED'    : ( -1, 4,  5, 'V', 'VVVVV'),
+    'REPLACE'     : (119, 4,  4, 'V', 'VVVV'),
+    'REPLACEB'    : (207, 4,  4, 'V', 'VVVV'),
+    'REPT'        : ( 30, 2,  2, 'V', 'VV'),
+    'RIGHT'       : (116, 1,  2, 'V', 'VV'),
+    'RIGHTB'      : (209, 1,  2, 'V', 'VV'),
+    'ROMAN'       : (354, 1,  2, 'V', 'VV'),
+    'ROUND'       : ( 27, 2,  2, 'V', 'VV'),
+    'ROUNDDOWN'   : (213, 2,  2, 'V', 'VV'),
+    'ROUNDUP'     : (212, 2,  2, 'V', 'VV'),
+    'ROW'         : (  8, 0,  1, 'V', 'R'),
+    'ROWS'        : ( 76, 1,  1, 'V', 'R'),
+    'RSQ'         : (313, 2,  2, 'V', 'AA'),
+    'RTD'         : (379, 3, 30, 'A', 'VVV+'),
+    'SEARCH'      : ( 82, 2,  3, 'V', 'VVV'),
+    'SEARCHB'     : (206, 2,  3, 'V', 'VVV'),
+    'SECOND'      : ( 73, 1,  1, 'V', 'V'),
+    'SERIESSUM'   : ( -1, 4,  4, 'V', 'VVVA'),
+    'SIGN'        : ( 26, 1,  1, 'V', 'V'),
+    'SIN'         : ( 15, 1,  1, 'V', 'V'),
+    'SINH'        : (229, 1,  1, 'V', 'V'),
+    'SKEW'        : (323, 1, 30, 'V', 'D+'),
+    'SLN'         : (142, 3,  3, 'V', 'VVV'),
+    'SLOPE'       : (315, 2,  2, 'V', 'AA'),
+    'SMALL'       : (326, 2,  2, 'V', 'RV'),
+    'SQRT'        : ( 20, 1,  1, 'V', 'V'),
+    'SQRTPI'      : ( -1, 1,  1, 'V', 'V'),
+    'STANDARDIZE' : (297, 3,  3, 'V', 'VVV'),
+    'STDEV'       : ( 12, 1, 30, 'V', 'D+'),
+    'STDEVA'      : (366, 1, 30, 'V', 'D+'),
+    'STDEVP'      : (193, 1, 30, 'V', 'D+'),
+    'STDEVPA'     : (364, 1, 30, 'V', 'D+'),
+    'STEYX'       : (314, 2,  2, 'V', 'AA'),
+    'SUBSTITUTE'  : (120, 3,  4, 'V', 'VVVV'),
+    'SUBTOTAL'    : (344, 2, 30, 'V', 'VR+'),
+    'SUM'         : (  4, 1, 30, 'V', 'D+'),
+    'SUMIF'       : (345, 2,  3, 'V', 'RVR'),
+    'SUMPRODUCT'  : (228, 1, 30, 'V', 'A+'),
+    'SUMSQ'       : (321, 1, 30, 'V', 'D+'),
+    'SUMX2MY2'    : (304, 2,  2, 'V', 'AA'),
+    'SUMX2PY2'    : (305, 2,  2, 'V', 'AA'),
+    'SUMXMY2'     : (303, 2,  2, 'V', 'AA'),
+    'SYD'         : (143, 4,  4, 'V', 'VVVV'),
+    'T'           : (130, 1,  1, 'V', 'R'),
+    'TAN'         : ( 17, 1,  1, 'V', 'V'),
+    'TANH'        : (231, 1,  1, 'V', 'V'),
+    'TBILLEQ'     : ( -1, 3,  3, 'V', 'VVV'),
+    'TBILLPRICE'  : ( -1, 3,  3, 'V', 'VVV'),
+    'TBILLYIELD'  : ( -1, 3,  3, 'V', 'VVV'),
+    'TDIST'       : (301, 3,  3, 'V', 'VVV'),
+    'TEXT'        : ( 48, 2,  2, 'V', 'VV'),
+    'TIME'        : ( 66, 3,  3, 'V', 'VVV'),
+    'TIMEVALUE'   : (141, 1,  1, 'V', 'V'),
+    'TINV'        : (332, 2,  2, 'V', 'VV'),
+    'TODAY'       : (221, 0,  0, 'V', '-'),
+    'TRANSPOSE'   : ( 83, 1,  1, 'A', 'A'),
+    'TREND'       : ( 50, 1,  4, 'A', 'RRRV'),
+    'TRIM'        : (118, 1,  1, 'V', 'V'),
+    'TRIMMEAN'    : (331, 2,  2, 'V', 'RV'),
+    'TRUE'        : ( 34, 0,  0, 'V', '-'),
+    'TRUNC'       : (197, 1,  2, 'V', 'VV'),
+    'TTEST'       : (316, 4,  4, 'V', 'AAVV'),
+    'TYPE'        : ( 86, 1,  1, 'V', 'V'),
+    'UPPER'       : (113, 1,  1, 'V', 'V'),
+    'USDOLLAR'    : (204, 1,  2, 'V', 'VV'),
+    'VALUE'       : ( 33, 1,  1, 'V', 'V'),
+    'VAR'         : ( 46, 1, 30, 'V', 'D+'),
+    'VARA'        : (367, 1, 30, 'V', 'D+'),
+    'VARP'        : (194, 1, 30, 'V', 'D+'),
+    'VARPA'       : (365, 1, 30, 'V', 'D+'),
+    'VDB'         : (222, 5,  7, 'V', 'VVVVVVV'),
+    'VLOOKUP'     : (102, 3,  4, 'V', 'VRRV'),
+    'WEEKDAY'     : ( 70, 1,  2, 'V', 'VV'),
+    'WEEKNUM'     : ( -1, 1,  2, 'V', 'VV'),
+    'WEIBULL'     : (302, 4,  4, 'V', 'VVVV'),
+    'WORKDAY'     : ( -1, 2,  3, 'V', 'VVR'),
+    'XIRR'        : ( -1, 2,  3, 'V', 'AAV'),
+    'XNPV'        : ( -1, 3,  3, 'V', 'VAA'),
+    'YEAR'        : ( 69, 1,  1, 'V', 'V'),
+    'YEARFRAC'    : ( -1, 2,  3, 'V', 'VVV'),
+    'YIELD'       : ( -1, 6,  7, 'V', 'VVVVVVV'),
+    'YIELDDISC'   : ( -1, 4,  5, 'V', 'VVVVV'),
+    'YIELDMAT'    : ( -1, 5,  6, 'V', 'VVVVVV'),
+    'ZTEST'       : (324, 2,  3, 'V', 'RVV'),
+    }
+
+# Formulas Parse things
+
+ptgExp          = 0x01
+ptgTbl          = 0x02
+ptgAdd          = 0x03
+ptgSub          = 0x04
+ptgMul          = 0x05
+ptgDiv          = 0x06
+ptgPower        = 0x07
+ptgConcat       = 0x08
+ptgLT           = 0x09
+ptgLE           = 0x0a
+ptgEQ           = 0x0b
+ptgGE           = 0x0c
+ptgGT           = 0x0d
+ptgNE           = 0x0e
+ptgIsect        = 0x0f
+ptgUnion        = 0x10
+ptgRange        = 0x11
+ptgUplus        = 0x12
+ptgUminus       = 0x13
+ptgPercent      = 0x14
+ptgParen        = 0x15
+ptgMissArg      = 0x16
+ptgStr          = 0x17
+ptgExtend       = 0x18
+ptgAttr         = 0x19
+ptgSheet        = 0x1a
+ptgEndSheet     = 0x1b
+ptgErr          = 0x1c
+ptgBool         = 0x1d
+ptgInt          = 0x1e
+ptgNum          = 0x1f
+
+ptgArrayR       = 0x20
+ptgFuncR        = 0x21
+ptgFuncVarR     = 0x22
+ptgNameR        = 0x23
+ptgRefR         = 0x24
+ptgAreaR        = 0x25
+ptgMemAreaR     = 0x26
+ptgMemErrR      = 0x27
+ptgMemNoMemR    = 0x28
+ptgMemFuncR     = 0x29
+ptgRefErrR      = 0x2a
+ptgAreaErrR     = 0x2b
+ptgRefNR        = 0x2c
+ptgAreaNR       = 0x2d
+ptgMemAreaNR    = 0x2e
+ptgMemNoMemNR   = 0x2f
+ptgNameXR       = 0x39
+ptgRef3dR       = 0x3a
+ptgArea3dR      = 0x3b
+ptgRefErr3dR    = 0x3c
+ptgAreaErr3dR   = 0x3d
+
+ptgArrayV       = 0x40
+ptgFuncV        = 0x41
+ptgFuncVarV     = 0x42
+ptgNameV        = 0x43
+ptgRefV         = 0x44
+ptgAreaV        = 0x45
+ptgMemAreaV     = 0x46
+ptgMemErrV      = 0x47
+ptgMemNoMemV    = 0x48
+ptgMemFuncV     = 0x49
+ptgRefErrV      = 0x4a
+ptgAreaErrV     = 0x4b
+ptgRefNV        = 0x4c
+ptgAreaNV       = 0x4d
+ptgMemAreaNV    = 0x4e
+ptgMemNoMemNV   = 0x4f
+ptgFuncCEV      = 0x58
+ptgNameXV       = 0x59
+ptgRef3dV       = 0x5a
+ptgArea3dV      = 0x5b
+ptgRefErr3dV    = 0x5c
+ptgAreaErr3dV   = 0x5d
+
+ptgArrayA       = 0x60
+ptgFuncA        = 0x61
+ptgFuncVarA     = 0x62
+ptgNameA        = 0x63
+ptgRefA         = 0x64
+ptgAreaA        = 0x65
+ptgMemAreaA     = 0x66
+ptgMemErrA      = 0x67
+ptgMemNoMemA    = 0x68
+ptgMemFuncA     = 0x69
+ptgRefErrA      = 0x6a
+ptgAreaErrA     = 0x6b
+ptgRefNA        = 0x6c
+ptgAreaNA       = 0x6d
+ptgMemAreaNA    = 0x6e
+ptgMemNoMemNA   = 0x6f
+ptgFuncCEA      = 0x78
+ptgNameXA       = 0x79
+ptgRef3dA       = 0x7a
+ptgArea3dA      = 0x7b
+ptgRefErr3dA    = 0x7c
+ptgAreaErr3dA   = 0x7d
+
+
+PtgNames = {
+    ptgExp         : "ptgExp",
+    ptgTbl         : "ptgTbl",
+    ptgAdd         : "ptgAdd",
+    ptgSub         : "ptgSub",
+    ptgMul         : "ptgMul",
+    ptgDiv         : "ptgDiv",
+    ptgPower       : "ptgPower",
+    ptgConcat      : "ptgConcat",
+    ptgLT          : "ptgLT",
+    ptgLE          : "ptgLE",
+    ptgEQ          : "ptgEQ",
+    ptgGE          : "ptgGE",
+    ptgGT          : "ptgGT",
+    ptgNE          : "ptgNE",
+    ptgIsect       : "ptgIsect",
+    ptgUnion       : "ptgUnion",
+    ptgRange       : "ptgRange",
+    ptgUplus       : "ptgUplus",
+    ptgUminus      : "ptgUminus",
+    ptgPercent     : "ptgPercent",
+    ptgParen       : "ptgParen",
+    ptgMissArg     : "ptgMissArg",
+    ptgStr         : "ptgStr",
+    ptgExtend      : "ptgExtend",
+    ptgAttr        : "ptgAttr",
+    ptgSheet       : "ptgSheet",
+    ptgEndSheet    : "ptgEndSheet",
+    ptgErr         : "ptgErr",
+    ptgBool        : "ptgBool",
+    ptgInt         : "ptgInt",
+    ptgNum         : "ptgNum",
+    ptgArrayR      : "ptgArrayR",
+    ptgFuncR       : "ptgFuncR",
+    ptgFuncVarR    : "ptgFuncVarR",
+    ptgNameR       : "ptgNameR",
+    ptgRefR        : "ptgRefR",
+    ptgAreaR       : "ptgAreaR",
+    ptgMemAreaR    : "ptgMemAreaR",
+    ptgMemErrR     : "ptgMemErrR",
+    ptgMemNoMemR   : "ptgMemNoMemR",
+    ptgMemFuncR    : "ptgMemFuncR",
+    ptgRefErrR     : "ptgRefErrR",
+    ptgAreaErrR    : "ptgAreaErrR",
+    ptgRefNR       : "ptgRefNR",
+    ptgAreaNR      : "ptgAreaNR",
+    ptgMemAreaNR   : "ptgMemAreaNR",
+    ptgMemNoMemNR  : "ptgMemNoMemNR",
+    ptgNameXR      : "ptgNameXR",
+    ptgRef3dR      : "ptgRef3dR",
+    ptgArea3dR     : "ptgArea3dR",
+    ptgRefErr3dR   : "ptgRefErr3dR",
+    ptgAreaErr3dR  : "ptgAreaErr3dR",
+    ptgArrayV      : "ptgArrayV",
+    ptgFuncV       : "ptgFuncV",
+    ptgFuncVarV    : "ptgFuncVarV",
+    ptgNameV       : "ptgNameV",
+    ptgRefV        : "ptgRefV",
+    ptgAreaV       : "ptgAreaV",
+    ptgMemAreaV    : "ptgMemAreaV",
+    ptgMemErrV     : "ptgMemErrV",
+    ptgMemNoMemV   : "ptgMemNoMemV",
+    ptgMemFuncV    : "ptgMemFuncV",
+    ptgRefErrV     : "ptgRefErrV",
+    ptgAreaErrV    : "ptgAreaErrV",
+    ptgRefNV       : "ptgRefNV",
+    ptgAreaNV      : "ptgAreaNV",
+    ptgMemAreaNV   : "ptgMemAreaNV",
+    ptgMemNoMemNV  : "ptgMemNoMemNV",
+    ptgFuncCEV     : "ptgFuncCEV",
+    ptgNameXV      : "ptgNameXV",
+    ptgRef3dV      : "ptgRef3dV",
+    ptgArea3dV     : "ptgArea3dV",
+    ptgRefErr3dV   : "ptgRefErr3dV",
+    ptgAreaErr3dV  : "ptgAreaErr3dV",
+    ptgArrayA      : "ptgArrayA",
+    ptgFuncA       : "ptgFuncA",
+    ptgFuncVarA    : "ptgFuncVarA",
+    ptgNameA       : "ptgNameA",
+    ptgRefA        : "ptgRefA",
+    ptgAreaA       : "ptgAreaA",
+    ptgMemAreaA    : "ptgMemAreaA",
+    ptgMemErrA     : "ptgMemErrA",
+    ptgMemNoMemA   : "ptgMemNoMemA",
+    ptgMemFuncA    : "ptgMemFuncA",
+    ptgRefErrA     : "ptgRefErrA",
+    ptgAreaErrA    : "ptgAreaErrA",
+    ptgRefNA       : "ptgRefNA",
+    ptgAreaNA      : "ptgAreaNA",
+    ptgMemAreaNA   : "ptgMemAreaNA",
+    ptgMemNoMemNA  : "ptgMemNoMemNA",
+    ptgFuncCEA     : "ptgFuncCEA",
+    ptgNameXA      : "ptgNameXA",
+    ptgRef3dA      : "ptgRef3dA",
+    ptgArea3dA     : "ptgArea3dA",
+    ptgRefErr3dA   : "ptgRefErr3dA",
+    ptgAreaErr3dA  : "ptgAreaErr3dA"
+}
+
+
+error_msg_by_code = {
+    0x00: u"#NULL!",  # intersection of two cell ranges is empty
+    0x07: u"#DIV/0!", # division by zero
+    0x0F: u"#VALUE!", # wrong type of operand
+    0x17: u"#REF!",   # illegal or deleted cell reference
+    0x1D: u"#NAME?",  # wrong function or range name
+    0x24: u"#NUM!",   # value range overflow
+    0x2A: u"#N/A!"    # argument or function not available
+}
diff --git a/tablib/packages/xlwt/Formatting.py b/tablib/packages/xlwt/Formatting.py
new file mode 100644
index 0000000..76b8e8f
--- /dev/null
+++ b/tablib/packages/xlwt/Formatting.py
@@ -0,0 +1,261 @@
+#!/usr/bin/env python
+'''
+The  XF  record is able to store explicit cell formatting attributes or the
+attributes  of  a cell style. Explicit formatting includes the reference to
+a  cell  style  XF  record. This allows to extend a defined cell style with
+some  explicit  attributes.  The  formatting  attributes  are  divided into
+6 groups:
+
+Group           Attributes
+-------------------------------------
+Number format   Number format index (index to FORMAT record)
+Font            Font index (index to FONT record)
+Alignment       Horizontal and vertical alignment, text wrap, indentation,
+                orientation/rotation, text direction
+Border          Border line styles and colours
+Background      Background area style and colours
+Protection      Cell locked, formula hidden
+
+For  each  group  a flag in the cell XF record specifies whether to use the
+attributes  contained  in  that  XF  record  or  in  the  referenced  style
+XF  record. In style XF records, these flags specify whether the attributes
+will  overwrite  explicit  cell  formatting  when  the  style is applied to
+a  cell. Changing a cell style (without applying this style to a cell) will
+change  all  cells which already use that style and do not contain explicit
+cell  attributes for the changed style attributes. If a cell XF record does
+not  contain  explicit  attributes  in a group (if the attribute group flag
+is not set), it repeats the attributes of its style XF record.
+
+'''
+
+import BIFFRecords
+
+class Font(object):
+
+    ESCAPEMENT_NONE         = 0x00
+    ESCAPEMENT_SUPERSCRIPT  = 0x01
+    ESCAPEMENT_SUBSCRIPT    = 0x02
+
+    UNDERLINE_NONE          = 0x00
+    UNDERLINE_SINGLE        = 0x01
+    UNDERLINE_SINGLE_ACC    = 0x21
+    UNDERLINE_DOUBLE        = 0x02
+    UNDERLINE_DOUBLE_ACC    = 0x22
+
+    FAMILY_NONE         = 0x00
+    FAMILY_ROMAN        = 0x01
+    FAMILY_SWISS        = 0x02
+    FAMILY_MODERN       = 0x03
+    FAMILY_SCRIPT       = 0x04
+    FAMILY_DECORATIVE   = 0x05
+
+    CHARSET_ANSI_LATIN          = 0x00
+    CHARSET_SYS_DEFAULT         = 0x01
+    CHARSET_SYMBOL              = 0x02
+    CHARSET_APPLE_ROMAN         = 0x4D
+    CHARSET_ANSI_JAP_SHIFT_JIS  = 0x80
+    CHARSET_ANSI_KOR_HANGUL     = 0x81
+    CHARSET_ANSI_KOR_JOHAB      = 0x82
+    CHARSET_ANSI_CHINESE_GBK    = 0x86
+    CHARSET_ANSI_CHINESE_BIG5   = 0x88
+    CHARSET_ANSI_GREEK          = 0xA1
+    CHARSET_ANSI_TURKISH        = 0xA2
+    CHARSET_ANSI_VIETNAMESE     = 0xA3
+    CHARSET_ANSI_HEBREW         = 0xB1
+    CHARSET_ANSI_ARABIC         = 0xB2
+    CHARSET_ANSI_BALTIC         = 0xBA
+    CHARSET_ANSI_CYRILLIC       = 0xCC
+    CHARSET_ANSI_THAI           = 0xDE
+    CHARSET_ANSI_LATIN_II       = 0xEE
+    CHARSET_OEM_LATIN_I         = 0xFF
+
+    def __init__(self):
+        # twip = 1/20 of a point = 1/1440 of a inch
+        # usually resolution == 96 pixels per 1 inch
+        # (rarely 120 pixels per 1 inch or another one)
+
+        self.height = 0x00C8 # 200: this is font with height 10 points
+        self.italic = False
+        self.struck_out = False
+        self.outline = False
+        self.shadow = False
+        self.colour_index = 0x7FFF
+        self.bold = False
+        self._weight = 0x0190 # 0x02BC gives bold font
+        self.escapement = self.ESCAPEMENT_NONE
+        self.underline = self.UNDERLINE_NONE
+        self.family = self.FAMILY_NONE
+        self.charset = self.CHARSET_SYS_DEFAULT
+        self.name = 'Arial'
+
+    def get_biff_record(self):
+        height = self.height
+
+        options = 0x00
+        if self.bold:
+            options |= 0x01
+            self._weight = 0x02BC
+        if self.italic:
+            options |= 0x02
+        if self.underline != self.UNDERLINE_NONE:
+            options |= 0x04
+        if self.struck_out:
+            options |= 0x08
+        if self.outline:
+            options |= 0x010
+        if self.shadow:
+            options |= 0x020
+
+        colour_index = self.colour_index
+        weight = self._weight
+        escapement = self.escapement
+        underline = self.underline
+        family = self.family
+        charset = self.charset
+        name = self.name
+
+        return BIFFRecords.FontRecord(height, options, colour_index, weight, escapement,
+                    underline, family, charset,
+                    name)
+
+    def _search_key(self):
+        return (
+            self.height,
+            self.italic,
+            self.struck_out,
+            self.outline,
+            self.shadow,
+            self.colour_index,
+            self.bold,
+            self._weight,
+            self.escapement,
+            self.underline,
+            self.family,
+            self.charset,
+            self.name,
+            )
+
+class Alignment(object):
+    HORZ_GENERAL                = 0x00
+    HORZ_LEFT                   = 0x01
+    HORZ_CENTER                 = 0x02
+    HORZ_RIGHT                  = 0x03
+    HORZ_FILLED                 = 0x04
+    HORZ_JUSTIFIED              = 0x05 # BIFF4-BIFF8X
+    HORZ_CENTER_ACROSS_SEL      = 0x06 # Centred across selection (BIFF4-BIFF8X)
+    HORZ_DISTRIBUTED            = 0x07 # Distributed (BIFF8X)
+
+    VERT_TOP                    = 0x00
+    VERT_CENTER                 = 0x01
+    VERT_BOTTOM                 = 0x02
+    VERT_JUSTIFIED              = 0x03 # Justified (BIFF5-BIFF8X)
+    VERT_DISTRIBUTED            = 0x04 # Distributed (BIFF8X)
+
+    DIRECTION_GENERAL           = 0x00 # BIFF8X
+    DIRECTION_LR                = 0x01
+    DIRECTION_RL                = 0x02
+
+    ORIENTATION_NOT_ROTATED     = 0x00
+    ORIENTATION_STACKED         = 0x01
+    ORIENTATION_90_CC           = 0x02
+    ORIENTATION_90_CW           = 0x03
+
+    ROTATION_0_ANGLE            = 0x00
+    ROTATION_STACKED            = 0xFF
+
+    WRAP_AT_RIGHT               = 0x01
+    NOT_WRAP_AT_RIGHT           = 0x00
+
+    SHRINK_TO_FIT               = 0x01
+    NOT_SHRINK_TO_FIT           = 0x00
+
+    def __init__(self):
+        self.horz = self.HORZ_GENERAL
+        self.vert = self.VERT_BOTTOM
+        self.dire = self.DIRECTION_GENERAL
+        self.orie = self.ORIENTATION_NOT_ROTATED
+        self.rota = self.ROTATION_0_ANGLE
+        self.wrap = self.NOT_WRAP_AT_RIGHT
+        self.shri = self.NOT_SHRINK_TO_FIT
+        self.inde = 0
+        self.merg = 0
+
+    def _search_key(self):
+        return (
+            self.horz, self.vert, self.dire, self.orie, self.rota,
+            self.wrap, self.shri, self.inde, self.merg,
+            )
+
+class Borders(object):
+    NO_LINE = 0x00
+    THIN    = 0x01
+    MEDIUM  = 0x02
+    DASHED  = 0x03
+    DOTTED  = 0x04
+    THICK   = 0x05
+    DOUBLE  = 0x06
+    HAIR    = 0x07
+    #The following for BIFF8
+    MEDIUM_DASHED               = 0x08
+    THIN_DASH_DOTTED            = 0x09
+    MEDIUM_DASH_DOTTED          = 0x0A
+    THIN_DASH_DOT_DOTTED        = 0x0B
+    MEDIUM_DASH_DOT_DOTTED      = 0x0C
+    SLANTED_MEDIUM_DASH_DOTTED  = 0x0D
+
+    NEED_DIAG1      = 0x01
+    NEED_DIAG2      = 0x01
+    NO_NEED_DIAG1   = 0x00
+    NO_NEED_DIAG2   = 0x00
+
+    def __init__(self):
+        self.left   = self.NO_LINE
+        self.right  = self.NO_LINE
+        self.top    = self.NO_LINE
+        self.bottom = self.NO_LINE
+        self.diag   = self.NO_LINE
+
+        self.left_colour   = 0x40
+        self.right_colour  = 0x40
+        self.top_colour    = 0x40
+        self.bottom_colour = 0x40
+        self.diag_colour   = 0x40
+
+        self.need_diag1 = self.NO_NEED_DIAG1
+        self.need_diag2 = self.NO_NEED_DIAG2
+
+    def _search_key(self):
+        return (
+             self.left, self.right, self.top, self.bottom, self.diag,
+             self.left_colour, self.right_colour, self.top_colour,
+             self.bottom_colour, self.diag_colour,
+             self.need_diag1, self.need_diag2,
+            )
+
+class Pattern(object):
+    # patterns 0x00 - 0x12
+    NO_PATTERN      = 0x00
+    SOLID_PATTERN   = 0x01
+
+    def __init__(self):
+        self.pattern = self.NO_PATTERN
+        self.pattern_fore_colour = 0x40
+        self.pattern_back_colour = 0x41
+
+    def _search_key(self):
+        return (
+            self.pattern,
+            self.pattern_fore_colour,
+            self.pattern_back_colour,
+            )
+
+class Protection(object):
+    def __init__(self):
+        self.cell_locked = 1
+        self.formula_hidden = 0
+
+    def _search_key(self):
+        return (
+            self.cell_locked,
+            self.formula_hidden,
+            )
diff --git a/tablib/packages/xlwt/Row.py b/tablib/packages/xlwt/Row.py
new file mode 100644
index 0000000..a834ea1
--- /dev/null
+++ b/tablib/packages/xlwt/Row.py
@@ -0,0 +1,253 @@
+# -*- coding: windows-1252 -*-
+
+import BIFFRecords
+import Style
+from Cell import StrCell, BlankCell, NumberCell, FormulaCell, MulBlankCell, BooleanCell, ErrorCell, \
+    _get_cells_biff_data_mul
+import ExcelFormula
+import datetime as dt
+try:
+    from decimal import Decimal
+except ImportError:
+    # Python 2.3: decimal not supported; create dummy Decimal class
+    class Decimal(object):
+        pass
+
+
+class Row(object):
+    __slots__ = [# private variables
+                 "__idx",
+                 "__parent",
+                 "__parent_wb",
+                 "__cells",
+                 "__min_col_idx",
+                 "__max_col_idx",
+                 "__xf_index",
+                 "__has_default_xf_index",
+                 "__height_in_pixels",
+                 # public variables
+                 "height",
+                 "has_default_height",
+                 "height_mismatch",
+                 "level",
+                 "collapse",
+                 "hidden",
+                 "space_above",
+                 "space_below"]
+
+    def __init__(self, rowx, parent_sheet):
+        if not (isinstance(rowx, int) and 0 <= rowx <= 65535):
+            raise ValueError("row index (%r) not an int in range(65536)" % rowx)
+        self.__idx = rowx
+        self.__parent = parent_sheet
+        self.__parent_wb = parent_sheet.get_parent()
+        self.__cells = {}
+        self.__min_col_idx = 0
+        self.__max_col_idx = 0
+        self.__xf_index = 0x0F
+        self.__has_default_xf_index = 0
+        self.__height_in_pixels = 0x11
+
+        self.height = 0x00FF
+        self.has_default_height = 0x00
+        self.height_mismatch = 0
+        self.level = 0
+        self.collapse = 0
+        self.hidden = 0
+        self.space_above = 0
+        self.space_below = 0
+
+
+    def __adjust_height(self, style):
+        twips = style.font.height
+        points = float(twips)/20.0
+        # Cell height in pixels can be calcuted by following approx. formula:
+        # cell height in pixels = font height in points * 83/50 + 2/5
+        # It works when screen resolution is 96 dpi
+        pix = int(round(points*83.0/50.0 + 2.0/5.0))
+        if pix > self.__height_in_pixels:
+            self.__height_in_pixels = pix
+
+
+    def __adjust_bound_col_idx(self, *args):
+        for arg in args:
+            iarg = int(arg)
+            if not ((0 <= iarg <= 255) and arg == iarg):
+                raise ValueError("column index (%r) not an int in range(256)" % arg)
+            sheet = self.__parent
+            if iarg < self.__min_col_idx:
+                self.__min_col_idx = iarg
+            if iarg > self.__max_col_idx:
+                self.__max_col_idx = iarg
+            if iarg < sheet.first_used_col:
+                sheet.first_used_col = iarg
+            if iarg > sheet.last_used_col:
+                sheet.last_used_col = iarg
+
+    def __excel_date_dt(self, date):
+        if isinstance(date, dt.date) and (not isinstance(date, dt.datetime)):
+            epoch = dt.date(1899, 12, 31)
+        elif isinstance(date, dt.time):
+            date = dt.datetime.combine(dt.datetime(1900, 1, 1), date)
+            epoch = dt.datetime(1900, 1, 1, 0, 0, 0)
+        else:
+            epoch = dt.datetime(1899, 12, 31, 0, 0, 0)
+        delta = date - epoch
+        xldate = delta.days + float(delta.seconds) / (24*60*60)
+        # Add a day for Excel's missing leap day in 1900
+        if xldate > 59:
+            xldate += 1
+        return xldate
+
+    def get_height_in_pixels(self):
+        return self.__height_in_pixels
+
+
+    def set_style(self, style):
+        self.__adjust_height(style)
+        self.__xf_index = self.__parent_wb.add_style(style)
+        self.__has_default_xf_index = 1
+
+
+    def get_xf_index(self):
+        return self.__xf_index
+
+
+    def get_cells_count(self):
+        return len(self.__cells)
+
+
+    def get_min_col(self):
+        return self.__min_col_idx
+
+
+    def get_max_col(self):
+        return self.__max_col_idx
+
+
+    def get_row_biff_data(self):
+        height_options = (self.height & 0x07FFF)
+        height_options |= (self.has_default_height & 0x01) << 15
+
+        options =  (self.level & 0x07) << 0
+        options |= (self.collapse & 0x01) << 4
+        options |= (self.hidden & 0x01) << 5
+        options |= (self.height_mismatch & 0x01) << 6
+        options |= (self.__has_default_xf_index & 0x01) << 7
+        options |= (0x01 & 0x01) << 8
+        options |= (self.__xf_index & 0x0FFF) << 16
+        options |= (self.space_above & 1) << 28
+        options |= (self.space_below & 1) << 29
+
+        return BIFFRecords.RowRecord(self.__idx, self.__min_col_idx,
+            self.__max_col_idx, height_options, options).get()
+
+    def insert_cell(self, col_index, cell_obj):
+        if col_index in self.__cells:
+            if not self.__parent._cell_overwrite_ok:
+                msg = "Attempt to overwrite cell: sheetname=%r rowx=%d colx=%d" \
+                    % (self.__parent.name, self.__idx, col_index)
+                raise Exception(msg)
+            prev_cell_obj = self.__cells[col_index]
+            sst_idx = getattr(prev_cell_obj, 'sst_idx', None)
+            if sst_idx is not None:
+                self.__parent_wb.del_str(sst_idx)
+        self.__cells[col_index] = cell_obj
+
+    def insert_mulcells(self, colx1, colx2, cell_obj):
+        self.insert_cell(colx1, cell_obj)
+        for col_index in xrange(colx1+1, colx2+1):
+            self.insert_cell(col_index, None)
+
+    def get_cells_biff_data(self):
+        cell_items = [item for item in self.__cells.iteritems() if item[1] is not None]
+        cell_items.sort() # in column order
+        return _get_cells_biff_data_mul(self.__idx, cell_items)
+        # previously:
+        # return ''.join([cell.get_biff_data() for colx, cell in cell_items])
+
+    def get_index(self):
+        return self.__idx
+
+    def set_cell_text(self, colx, value, style=Style.default_style):
+        self.__adjust_height(style)
+        self.__adjust_bound_col_idx(colx)
+        xf_index = self.__parent_wb.add_style(style)
+        self.insert_cell(colx, StrCell(self.__idx, colx, xf_index, self.__parent_wb.add_str(value)))
+
+    def set_cell_blank(self, colx, style=Style.default_style):
+        self.__adjust_height(style)
+        self.__adjust_bound_col_idx(colx)
+        xf_index = self.__parent_wb.add_style(style)
+        self.insert_cell(colx, BlankCell(self.__idx, colx, xf_index))
+
+    def set_cell_mulblanks(self, first_colx, last_colx, style=Style.default_style):
+        assert 0 <= first_colx <= last_colx <= 255
+        self.__adjust_height(style)
+        self.__adjust_bound_col_idx(first_colx, last_colx)
+        xf_index = self.__parent_wb.add_style(style)
+        # ncols = last_colx - first_colx + 1
+        self.insert_mulcells(first_colx, last_colx, MulBlankCell(self.__idx, first_colx, last_colx, xf_index))
+
+    def set_cell_number(self, colx, number, style=Style.default_style):
+        self.__adjust_height(style)
+        self.__adjust_bound_col_idx(colx)
+        xf_index = self.__parent_wb.add_style(style)
+        self.insert_cell(colx, NumberCell(self.__idx, colx, xf_index, number))
+
+    def set_cell_date(self, colx, datetime_obj, style=Style.default_style):
+        self.__adjust_height(style)
+        self.__adjust_bound_col_idx(colx)
+        xf_index = self.__parent_wb.add_style(style)
+        self.insert_cell(colx,
+            NumberCell(self.__idx, colx, xf_index, self.__excel_date_dt(datetime_obj)))
+
+    def set_cell_formula(self, colx, formula, style=Style.default_style, calc_flags=0):
+        self.__adjust_height(style)
+        self.__adjust_bound_col_idx(colx)
+        xf_index = self.__parent_wb.add_style(style)
+        self.__parent_wb.add_sheet_reference(formula)
+        self.insert_cell(colx, FormulaCell(self.__idx, colx, xf_index, formula, calc_flags=0))
+
+    def set_cell_boolean(self, colx, value, style=Style.default_style):
+        self.__adjust_height(style)
+        self.__adjust_bound_col_idx(colx)
+        xf_index = self.__parent_wb.add_style(style)
+        self.insert_cell(colx, BooleanCell(self.__idx, colx, xf_index, bool(value)))
+
+    def set_cell_error(self, colx, error_string_or_code, style=Style.default_style):
+        self.__adjust_height(style)
+        self.__adjust_bound_col_idx(colx)
+        xf_index = self.__parent_wb.add_style(style)
+        self.insert_cell(colx, ErrorCell(self.__idx, colx, xf_index, error_string_or_code))
+
+    def write(self, col, label, style=Style.default_style):
+        self.__adjust_height(style)
+        self.__adjust_bound_col_idx(col)
+        style_index = self.__parent_wb.add_style(style)
+        if isinstance(label, basestring):
+            if len(label) > 0:
+                self.insert_cell(col,
+                    StrCell(self.__idx, col, style_index, self.__parent_wb.add_str(label))
+                    )
+            else:
+                self.insert_cell(col, BlankCell(self.__idx, col, style_index))
+        elif isinstance(label, bool): # bool is subclass of int; test bool first
+            self.insert_cell(col, BooleanCell(self.__idx, col, style_index, label))
+        elif isinstance(label, (float, int, long, Decimal)):
+            self.insert_cell(col, NumberCell(self.__idx, col, style_index, label))
+        elif isinstance(label, (dt.datetime, dt.date, dt.time)):
+            date_number = self.__excel_date_dt(label)
+            self.insert_cell(col, NumberCell(self.__idx, col, style_index, date_number))
+        elif label is None:
+            self.insert_cell(col, BlankCell(self.__idx, col, style_index))
+        elif isinstance(label, ExcelFormula.Formula):
+            self.__parent_wb.add_sheet_reference(label)
+            self.insert_cell(col, FormulaCell(self.__idx, col, style_index, label))
+        else:
+            raise Exception("Unexpected data type %r" % type(label))
+
+    write_blanks = set_cell_mulblanks
+
+
+
diff --git a/tablib/packages/xlwt/Style.py b/tablib/packages/xlwt/Style.py
new file mode 100644
index 0000000..bf5fb4c
--- /dev/null
+++ b/tablib/packages/xlwt/Style.py
@@ -0,0 +1,592 @@
+# -*- coding: windows-1252 -*-
+
+import Formatting
+from BIFFRecords import *
+
+FIRST_USER_DEFINED_NUM_FORMAT_IDX = 164
+
+class XFStyle(object):
+
+    def __init__(self):
+        self.num_format_str  = 'General'
+        self.font            = Formatting.Font()
+        self.alignment       = Formatting.Alignment()
+        self.borders         = Formatting.Borders()
+        self.pattern         = Formatting.Pattern()
+        self.protection      = Formatting.Protection()
+
+default_style = XFStyle()
+
+class StyleCollection(object):
+    _std_num_fmt_list = [
+            'general',
+            '0',
+            '0.00',
+            '#,##0',
+            '#,##0.00',
+            '"$"#,##0_);("$"#,##',
+            '"$"#,##0_);[Red]("$"#,##',
+            '"$"#,##0.00_);("$"#,##',
+            '"$"#,##0.00_);[Red]("$"#,##',
+            '0%',
+            '0.00%',
+            '0.00E+00',
+            '# ?/?',
+            '# ??/??',
+            'M/D/YY',
+            'D-MMM-YY',
+            'D-MMM',
+            'MMM-YY',
+            'h:mm AM/PM',
+            'h:mm:ss AM/PM',
+            'h:mm',
+            'h:mm:ss',
+            'M/D/YY h:mm',
+            '_(#,##0_);(#,##0)',
+            '_(#,##0_);[Red](#,##0)',
+            '_(#,##0.00_);(#,##0.00)',
+            '_(#,##0.00_);[Red](#,##0.00)',
+            '_("$"* #,##0_);_("$"* (#,##0);_("$"* "-"_);_(@_)',
+            '_(* #,##0_);_(* (#,##0);_(* "-"_);_(@_)',
+            '_("$"* #,##0.00_);_("$"* (#,##0.00);_("$"* "-"??_);_(@_)',
+            '_(* #,##0.00_);_(* (#,##0.00);_(* "-"??_);_(@_)',
+            'mm:ss',
+            '[h]:mm:ss',
+            'mm:ss.0',
+            '##0.0E+0',
+            '@'
+    ]
+
+    def __init__(self, style_compression=0):
+        self.style_compression = style_compression
+        self.stats = [0, 0, 0, 0, 0, 0]
+        self._font_id2x = {}
+        self._font_x2id = {}
+        self._font_val2x = {}
+
+        for x in (0, 1, 2, 3, 5): # The font with index 4 is omitted in all BIFF versions
+            font = Formatting.Font()
+            search_key = font._search_key()
+            self._font_id2x[font] = x
+            self._font_x2id[x] = font
+            self._font_val2x[search_key] = x
+
+        self._xf_id2x = {}
+        self._xf_x2id = {}
+        self._xf_val2x = {}
+
+        self._num_formats = {}
+        for fmtidx, fmtstr in zip(range(0, 23), StyleCollection._std_num_fmt_list[0:23]):
+            self._num_formats[fmtstr] = fmtidx
+        for fmtidx, fmtstr in zip(range(37, 50), StyleCollection._std_num_fmt_list[23:]):
+            self._num_formats[fmtstr] = fmtidx
+
+        self.default_style = XFStyle()
+        self._default_xf = self._add_style(self.default_style)[0]
+
+    def add(self, style):
+        if style == None:
+            return 0x10
+        return self._add_style(style)[1]
+
+    def _add_style(self, style):
+        num_format_str = style.num_format_str
+        if num_format_str in self._num_formats:
+            num_format_idx = self._num_formats[num_format_str]
+        else:
+            num_format_idx = (
+                FIRST_USER_DEFINED_NUM_FORMAT_IDX
+                + len(self._num_formats)
+                - len(StyleCollection._std_num_fmt_list)
+                )
+            self._num_formats[num_format_str] = num_format_idx
+
+        font = style.font
+        if font in self._font_id2x:
+            font_idx = self._font_id2x[font]
+            self.stats[0] += 1
+        elif self.style_compression:
+            search_key = font._search_key()
+            font_idx = self._font_val2x.get(search_key)
+            if font_idx is not None:
+                self._font_id2x[font] = font_idx
+                self.stats[1] += 1
+            else:
+                font_idx = len(self._font_x2id) + 1 # Why plus 1? Font 4 is missing
+                self._font_id2x[font] = font_idx
+                self._font_val2x[search_key] = font_idx
+                self._font_x2id[font_idx] = font
+                self.stats[2] += 1
+        else:
+            font_idx = len(self._font_id2x) + 1
+            self._font_id2x[font] = font_idx
+            self.stats[2] += 1
+
+        gof = (style.alignment, style.borders, style.pattern, style.protection)
+        xf = (font_idx, num_format_idx) + gof
+        if xf in self._xf_id2x:
+            xf_index = self._xf_id2x[xf]
+            self.stats[3] += 1
+        elif self.style_compression == 2:
+            xf_key = (font_idx, num_format_idx) + tuple([obj._search_key() for obj in gof])
+            xf_index = self._xf_val2x.get(xf_key)
+            if xf_index is not None:
+                self._xf_id2x[xf] = xf_index
+                self.stats[4] += 1
+            else:
+                xf_index = 0x10 + len(self._xf_x2id)
+                self._xf_id2x[xf] = xf_index
+                self._xf_val2x[xf_key] = xf_index
+                self._xf_x2id[xf_index] = xf
+                self.stats[5] += 1
+        else:
+            xf_index = 0x10 + len(self._xf_id2x)
+            self._xf_id2x[xf] = xf_index
+            self.stats[5] += 1
+
+        if xf_index >= 0xFFF:
+            # 12 bits allowed, 0xFFF is a sentinel value
+            raise ValueError("More than 4094 XFs (styles)")
+
+        return xf, xf_index
+
+    def get_biff_data(self):
+        result = ''
+        result += self._all_fonts()
+        result += self._all_num_formats()
+        result += self._all_cell_styles()
+        result += self._all_styles()
+        return result
+
+    def _all_fonts(self):
+        result = ''
+        if self.style_compression:
+            alist = self._font_x2id.items()
+        else:
+            alist = [(x, o) for o, x in self._font_id2x.items()]
+        alist.sort()
+        for font_idx, font in alist:
+            result += font.get_biff_record().get()
+        return result
+
+    def _all_num_formats(self):
+        result = ''
+        alist = [
+            (v, k)
+            for k, v in self._num_formats.items()
+            if v >= FIRST_USER_DEFINED_NUM_FORMAT_IDX
+            ]
+        alist.sort()
+        for fmtidx, fmtstr in alist:
+            result += NumberFormatRecord(fmtidx, fmtstr).get()
+        return result
+
+    def _all_cell_styles(self):
+        result = ''
+        for i in range(0, 16):
+            result += XFRecord(self._default_xf, 'style').get()
+        if self.style_compression == 2:
+            alist = self._xf_x2id.items()
+        else:
+            alist = [(x, o) for o, x in self._xf_id2x.items()]
+        alist.sort()
+        for xf_idx, xf in alist:
+            result += XFRecord(xf).get()
+        return result
+
+    def _all_styles(self):
+        return StyleRecord().get()
+
+# easyxf and its supporting objects ###################################
+
+class EasyXFException(Exception):
+    pass
+
+class EasyXFCallerError(EasyXFException):
+    pass
+
+class EasyXFAuthorError(EasyXFException):
+    pass
+
+class IntULim(object):
+    # If astring represents a valid unsigned integer ('123', '0xabcd', etc)
+    # and it is <= limit, return the int value; otherwise return None.
+
+    def __init__(self, limit):
+        self.limit = limit
+
+    def __call__(self, astring):
+        try:
+            value = int(astring, 0)
+        except ValueError:
+            return None
+        if not 0 <= value <= self.limit:
+            return None
+        return value
+
+bool_map = {
+    # Text values for all Boolean attributes
+    '1': 1, 'yes': 1, 'true':  1, 'on':  1,
+    '0': 0, 'no':  0, 'false': 0, 'off': 0,
+    }
+
+border_line_map = {
+    # Text values for these borders attributes:
+    # left, right, top, bottom and diag
+    'no_line':  0x00,
+    'thin':     0x01,
+    'medium':   0x02,
+    'dashed':   0x03,
+    'dotted':   0x04,
+    'thick':    0x05,
+    'double':   0x06,
+    'hair':     0x07,
+    'medium_dashed':                0x08,
+    'thin_dash_dotted':             0x09,
+    'medium_dash_dotted':           0x0a,
+    'thin_dash_dot_dotted':         0x0b,
+    'medium_dash_dot_dotted':       0x0c,
+    'slanted_medium_dash_dotted':   0x0d,
+    }
+
+charset_map = {
+    # Text values for font.charset
+    'ansi_latin':           0x00,
+    'sys_default':          0x01,
+    'symbol':               0x02,
+    'apple_roman':          0x4d,
+    'ansi_jap_shift_jis':   0x80,
+    'ansi_kor_hangul':      0x81,
+    'ansi_kor_johab':       0x82,
+    'ansi_chinese_gbk':     0x86,
+    'ansi_chinese_big5':    0x88,
+    'ansi_greek':           0xa1,
+    'ansi_turkish':         0xa2,
+    'ansi_vietnamese':      0xa3,
+    'ansi_hebrew':          0xb1,
+    'ansi_arabic':          0xb2,
+    'ansi_baltic':          0xba,
+    'ansi_cyrillic':        0xcc,
+    'ansi_thai':            0xde,
+    'ansi_latin_ii':        0xee,
+    'oem_latin_i':          0xff,
+    }
+
+
+# Text values for colour indices. "grey" is a synonym of "gray".
+# The names are those given by Microsoft Excel 2003 to the colours
+# in the default palette. There is no great correspondence with
+# any W3C name-to-RGB mapping.
+_colour_map_text = """\
+aqua 0x31
+black 0x08
+blue 0x0C
+blue_gray 0x36
+bright_green 0x0B
+brown 0x3C
+coral 0x1D
+cyan_ega 0x0F
+dark_blue 0x12
+dark_blue_ega 0x12
+dark_green 0x3A
+dark_green_ega 0x11
+dark_purple 0x1C
+dark_red 0x10
+dark_red_ega 0x10
+dark_teal 0x38
+dark_yellow 0x13
+gold 0x33
+gray_ega 0x17
+gray25 0x16
+gray40 0x37
+gray50 0x17
+gray80 0x3F
+green 0x11
+ice_blue 0x1F
+indigo 0x3E
+ivory 0x1A
+lavender 0x2E
+light_blue 0x30
+light_green 0x2A
+light_orange 0x34
+light_turquoise 0x29
+light_yellow 0x2B
+lime 0x32
+magenta_ega 0x0E
+ocean_blue 0x1E
+olive_ega 0x13
+olive_green 0x3B
+orange 0x35
+pale_blue 0x2C
+periwinkle 0x18
+pink 0x0E
+plum 0x3D
+purple_ega 0x14
+red 0x0A
+rose 0x2D
+sea_green 0x39
+silver_ega 0x16
+sky_blue 0x28
+tan 0x2F
+teal 0x15
+teal_ega 0x15
+turquoise 0x0F
+violet 0x14
+white 0x09
+yellow 0x0D"""
+
+colour_map = {}
+for _line in _colour_map_text.splitlines():
+    _name, _num = _line.split()
+    _num = int(_num, 0)
+    colour_map[_name] = _num
+    if 'gray' in _name:
+        colour_map[_name.replace('gray', 'grey')] = _num
+del _colour_map_text, _line, _name, _num
+
+
+pattern_map = {
+    # Text values for pattern.pattern
+    # xlwt/doc/pattern_examples.xls showcases all of these patterns.
+    'no_fill':              0,
+    'none':                 0,
+    'solid':                1,
+    'solid_fill':           1,
+    'solid_pattern':        1,
+    'fine_dots':            2,
+    'alt_bars':             3,
+    'sparse_dots':          4,
+    'thick_horz_bands':     5,
+    'thick_vert_bands':     6,
+    'thick_backward_diag':  7,
+    'thick_forward_diag':   8,
+    'big_spots':            9,
+    'bricks':               10,
+    'thin_horz_bands':      11,
+    'thin_vert_bands':      12,
+    'thin_backward_diag':   13,
+    'thin_forward_diag':    14,
+    'squares':              15,
+    'diamonds':             16,
+    }
+
+def any_str_func(s):
+    return s.strip()
+
+def colour_index_func(s, maxval=0x7F):
+    try:
+        value = int(s, 0)
+    except ValueError:
+        return None
+    if not (0 <= value <= maxval):
+        return None
+    return value
+
+colour_index_func_7 = colour_index_func
+
+def colour_index_func_15(s):
+    return colour_index_func(s, maxval=0x7FFF)
+
+def rotation_func(s):
+    try:
+        value = int(s, 0)
+    except ValueError:
+        return None
+    if not (-90 <= value <= 90):
+        raise EasyXFCallerError("rotation %d: should be -90 to +90 degrees" % value)
+    if value < 0:
+        value = 90 - value # encode as 91 to 180 (clockwise)
+    return value
+
+xf_dict = {
+    'align': 'alignment', # synonym
+    'alignment': {
+        'dire': {
+            'general': 0,
+            'lr': 1,
+            'rl': 2,
+            },
+        'direction': 'dire',
+        'horiz': 'horz',
+        'horizontal': 'horz',
+        'horz': {
+            'general': 0,
+            'left': 1,
+            'center': 2,
+            'centre': 2, # "align: horiz centre" means xf.alignment.horz is set to 2
+            'right': 3,
+            'filled': 4,
+            'justified': 5,
+            'center_across_selection': 6,
+            'centre_across_selection': 6,
+            'distributed': 7,
+            },
+        'inde': IntULim(15), # restriction: 0 <= value <= 15
+        'indent': 'inde',
+        'rota': [{'stacked': 255, 'none': 0, }, rotation_func],
+        'rotation': 'rota',
+        'shri': bool_map,
+        'shrink': 'shri',
+        'shrink_to_fit': 'shri',
+        'vert': {
+            'top': 0,
+            'center': 1,
+            'centre': 1,
+            'bottom': 2,
+            'justified': 3,
+            'distributed': 4,
+            },
+         'vertical': 'vert',
+         'wrap': bool_map,
+         },
+    'border': 'borders',
+    'borders': {
+        'left':     [border_line_map, IntULim(0x0d)],
+        'right':    [border_line_map, IntULim(0x0d)],
+        'top':      [border_line_map, IntULim(0x0d)],
+        'bottom':   [border_line_map, IntULim(0x0d)],
+        'diag':     [border_line_map, IntULim(0x0d)],
+        'top_colour':       [colour_map, colour_index_func_7],
+        'bottom_colour':    [colour_map, colour_index_func_7],
+        'left_colour':      [colour_map, colour_index_func_7],
+        'right_colour':     [colour_map, colour_index_func_7],
+        'diag_colour':      [colour_map, colour_index_func_7],
+        'top_color':        'top_colour',
+        'bottom_color':     'bottom_colour',
+        'left_color':       'left_colour',
+        'right_color':      'right_colour',
+        'diag_color':       'diag-colour',
+        'need_diag_1':  bool_map,
+        'need_diag_2':  bool_map,
+        },
+    'font': {
+        'bold': bool_map,
+        'charset': charset_map,
+        'color':  'colour_index',
+        'color_index':  'colour_index',
+        'colour':  'colour_index',
+        'colour_index': [colour_map, colour_index_func_15],
+        'escapement': {'none': 0, 'superscript': 1, 'subscript': 2},
+        'family': {'none': 0, 'roman': 1, 'swiss': 2, 'modern': 3, 'script': 4, 'decorative': 5, },
+        'height': IntULim(0xFFFF), # practical limits are much narrower e.g. 160 to 1440 (8pt to 72pt)
+        'italic': bool_map,
+        'name': any_str_func,
+        'outline': bool_map,
+        'shadow': bool_map,
+        'struck_out': bool_map,
+        'underline': [bool_map, {'none': 0, 'single': 1, 'single_acc': 0x21, 'double': 2, 'double_acc': 0x22, }],
+        },
+    'pattern': {
+        'back_color':   'pattern_back_colour',
+        'back_colour':  'pattern_back_colour',
+        'fore_color':   'pattern_fore_colour',
+        'fore_colour':  'pattern_fore_colour',
+        'pattern': [pattern_map, IntULim(16)],
+        'pattern_back_color':   'pattern_back_colour',
+        'pattern_back_colour':  [colour_map, colour_index_func_7],
+        'pattern_fore_color':   'pattern_fore_colour',
+        'pattern_fore_colour':  [colour_map, colour_index_func_7],
+        },
+    'protection': {
+        'cell_locked' :   bool_map,
+        'formula_hidden': bool_map,
+        },
+    }
+
+def _esplit(s, split_char, esc_char="\\"):
+    escaped = False
+    olist = ['']
+    for c in s:
+        if escaped:
+            olist[-1] += c
+            escaped = False
+        elif c == esc_char:
+            escaped = True
+        elif c == split_char:
+            olist.append('')
+        else:
+            olist[-1] += c
+    return olist
+
+def _parse_strg_to_obj(strg, obj, parse_dict,
+    field_sep=",", line_sep=";", intro_sep=":", esc_char="\\", debug=False):
+    for line in _esplit(strg, line_sep, esc_char):
+        line = line.strip()
+        if not line:
+            break
+        split_line = _esplit(line, intro_sep, esc_char)
+        if len(split_line) != 2:
+            raise EasyXFCallerError('line %r should have exactly 1 "%c"' % (line, intro_sep))
+        section, item_str = split_line
+        section = section.strip().lower()
+        for counter in range(2):
+            result = parse_dict.get(section)
+            if result is None:
+                raise EasyXFCallerError('section %r is unknown' % section)
+            if isinstance(result, dict):
+                break
+            if not isinstance(result, str):
+                raise EasyXFAuthorError(
+                    'section %r should map to dict or str object; found %r' % (section, type(result)))
+            # synonym
+            old_section = section
+            section = result
+        else:
+            raise EasyXFAuthorError('Attempt to define synonym of synonym (%r: %r)' % (old_section, result))
+        section_dict = result
+        section_obj = getattr(obj, section, None)
+        if section_obj is None:
+            raise EasyXFAuthorError('instance of %s class has no attribute named %s' % (obj.__class__.__name__, section))
+        for kv_str in _esplit(item_str, field_sep, esc_char):
+            guff = kv_str.split()
+            if not guff:
+                continue
+            k = guff[0].lower().replace('-', '_')
+            v = ' '.join(guff[1:])
+            if not v:
+                raise EasyXFCallerError("no value supplied for %s.%s" % (section, k))
+            for counter in xrange(2):
+                result = section_dict.get(k)
+                if result is None:
+                    raise EasyXFCallerError('%s.%s is not a known attribute' % (section, k))
+                if not isinstance(result, basestring):
+                    break
+                # synonym
+                old_k = k
+                k = result
+            else:
+                raise EasyXFAuthorError('Attempt to define synonym of synonym (%r: %r)' % (old_k, result))
+            value_info = result
+            if not isinstance(value_info, list):
+                value_info = [value_info]
+            for value_rule in value_info:
+                if isinstance(value_rule, dict):
+                    # dict maps strings to integer field values
+                    vl = v.lower().replace('-', '_')
+                    if vl in value_rule:
+                        value = value_rule[vl]
+                        break
+                elif callable(value_rule):
+                    value = value_rule(v)
+                    if value is not None:
+                        break
+                else:
+                    raise EasyXFAuthorError("unknown value rule for attribute %r: %r" % (k, value_rule))
+            else:
+                raise EasyXFCallerError("unexpected value %r for %s.%s" % (v, section, k))
+            try:
+                orig = getattr(section_obj, k)
+            except AttributeError:
+                raise EasyXFAuthorError('%s.%s in dictionary but not in supplied object' % (section, k))
+            if debug: print "+++ %s.%s = %r # %s; was %r" % (section, k, value, v, orig)
+            setattr(section_obj, k, value)
+
+def easyxf(strg_to_parse="", num_format_str=None,
+    field_sep=",", line_sep=";", intro_sep=":", esc_char="\\", debug=False):
+    xfobj = XFStyle()
+    if num_format_str is not None:
+        xfobj.num_format_str = num_format_str
+    if strg_to_parse:
+        _parse_strg_to_obj(strg_to_parse, xfobj, xf_dict,
+            field_sep=field_sep, line_sep=line_sep, intro_sep=intro_sep, esc_char=esc_char, debug=debug)
+    return xfobj
diff --git a/tablib/packages/xlwt/UnicodeUtils.py b/tablib/packages/xlwt/UnicodeUtils.py
new file mode 100644
index 0000000..630c259
--- /dev/null
+++ b/tablib/packages/xlwt/UnicodeUtils.py
@@ -0,0 +1,81 @@
+# -*- coding: windows-1252 -*-
+
+'''
+From BIFF8 on, strings are always stored using UTF-16LE  text encoding. The
+character  array  is  a  sequence  of  16-bit  values4.  Additionally it is
+possible  to  use  a  compressed  format, which omits the high bytes of all
+characters, if they are all zero.
+
+The following tables describe the standard format of the entire string, but
+in many records the strings differ from this format. This will be mentioned
+separately. It is possible (but not required) to store Rich-Text formatting
+information  and  Asian  phonetic information inside a Unicode string. This
+results  in  four  different  ways  to  store a string. The character array
+is not zero-terminated.
+
+The  string  consists  of  the  character count (as usual an 8-bit value or
+a  16-bit value), option flags, the character array and optional formatting
+information.  If the string is empty, sometimes the option flags field will
+not occur. This is mentioned at the respective place.
+
+Offset  Size    Contents
+0       1 or 2  Length of the string (character count, ln)
+1 or 2  1       Option flags:
+                  Bit   Mask Contents
+                  0     01H  Character compression (ccompr):
+                               0 = Compressed (8-bit characters)
+                               1 = Uncompressed (16-bit characters)
+                  2     04H  Asian phonetic settings (phonetic):
+                               0 = Does not contain Asian phonetic settings
+                               1 = Contains Asian phonetic settings
+                  3     08H  Rich-Text settings (richtext):
+                               0 = Does not contain Rich-Text settings
+                               1 = Contains Rich-Text settings
+[2 or 3] 2      (optional, only if richtext=1) Number of Rich-Text formatting runs (rt)
+[var.]   4      (optional, only if phonetic=1) Size of Asian phonetic settings block (in bytes, sz)
+var.     ln or 
+         2·ln   Character array (8-bit characters or 16-bit characters, dependent on ccompr)
+[var.]   4·rt   (optional, only if richtext=1) List of rt formatting runs 
+[var.]   sz     (optional, only if phonetic=1) Asian Phonetic Settings Block 
+'''
+
+
+from struct import pack
+
+def upack2(s, encoding='ascii'):
+    # If not unicode, make it so.
+    if isinstance(s, unicode):
+        us = s
+    else:
+        us = unicode(s, encoding)
+    # Limit is based on number of content characters
+    # (not on number of bytes in packed result)
+    len_us = len(us)
+    if len_us > 65535:
+        raise Exception('String longer than 65535 characters')
+    try:
+        encs = us.encode('latin1')
+        # Success here means all chars are in U+0000 to U+00FF
+        # inclusive, meaning that we can use "compressed format".
+        flag = 0
+    except UnicodeEncodeError:
+        encs = us.encode('utf_16_le')
+        flag = 1
+    return pack('<HB', len_us, flag) + encs
+
+def upack1(s, encoding='ascii'):
+    # Same as upack2(), but with a one-byte length field.
+    if isinstance(s, unicode):
+        us = s
+    else:
+        us = unicode(s, encoding)
+    len_us = len(us)
+    if len_us > 255:
+        raise Exception('String longer than 255 characters')
+    try:
+        encs = us.encode('latin1')
+        flag = 0
+    except UnicodeEncodeError:
+        encs = us.encode('utf_16_le')
+        flag = 1
+    return pack('<BB', len_us, flag) + encs
diff --git a/tablib/packages/xlwt/Utils.py b/tablib/packages/xlwt/Utils.py
new file mode 100644
index 0000000..19e8d21
--- /dev/null
+++ b/tablib/packages/xlwt/Utils.py
@@ -0,0 +1,196 @@
+# pyXLWriter: A library for generating Excel Spreadsheets
+# Copyright (c) 2004 Evgeny Filatov <fufff@users.sourceforge.net>
+# Copyright (c) 2002-2004 John McNamara (Perl Spreadsheet::WriteExcel)
+#
+# This library is free software; you can redistribute it and/or modify it
+# under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation; either version 2.1 of the License, or
+# (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser
+# General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this library; if not, write to the Free Software Foundation,
+# Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+#----------------------------------------------------------------------------
+# This module was written/ported from PERL Spreadsheet::WriteExcel module
+# The author of the PERL Spreadsheet::WriteExcel module is John McNamara
+# <jmcnamara@cpan.org>
+#----------------------------------------------------------------------------
+# See the README.txt distributed with pyXLWriter for more details.
+
+# Portions are (C) Roman V. Kiseliov, 2005
+
+
+# Utilities for work with reference to cells and with sheetnames
+
+
+__rev_id__ = """$Id: Utils.py 3844 2009-05-20 01:02:54Z sjmachin $"""
+
+import re
+from struct import pack
+from ExcelMagic import MAX_ROW, MAX_COL
+
+
+_re_cell_ex = re.compile(r"(\$?)([A-I]?[A-Z])(\$?)(\d+)", re.IGNORECASE)
+_re_row_range = re.compile(r"\$?(\d+):\$?(\d+)")
+_re_col_range = re.compile(r"\$?([A-I]?[A-Z]):\$?([A-I]?[A-Z])", re.IGNORECASE)
+_re_cell_range = re.compile(r"\$?([A-I]?[A-Z]\$?\d+):\$?([A-I]?[A-Z]\$?\d+)", re.IGNORECASE)
+_re_cell_ref = re.compile(r"\$?([A-I]?[A-Z]\$?\d+)", re.IGNORECASE)
+
+
+def col_by_name(colname):
+    """
+    """
+    col = 0
+    pow = 1
+    for i in xrange(len(colname)-1, -1, -1):
+        ch = colname[i]
+        col += (ord(ch) - ord('A') + 1) * pow
+        pow *= 26
+    return col - 1
+
+
+def cell_to_rowcol(cell):
+    """Convert an Excel cell reference string in A1 notation
+    to numeric row/col notation.
+
+    Returns: row, col, row_abs, col_abs
+
+    """
+    m = _re_cell_ex.match(cell)
+    if not m:
+        raise Exception("Ill-formed single_cell reference: %s" % cell)
+    col_abs, col, row_abs, row = m.groups()
+    row_abs = bool(row_abs)
+    col_abs = bool(col_abs)
+    row = int(row) - 1
+    col = col_by_name(col.upper())
+    return row, col, row_abs, col_abs
+
+
+def cell_to_rowcol2(cell):
+    """Convert an Excel cell reference string in A1 notation
+    to numeric row/col notation.
+
+    Returns: row, col
+
+    """
+    m = _re_cell_ex.match(cell)
+    if not m:
+        raise Exception("Error in cell format")
+    col_abs, col, row_abs, row = m.groups()
+    # Convert base26 column string to number
+    # All your Base are belong to us.
+    row = int(row) - 1
+    col = col_by_name(col.upper())
+    return row, col
+
+
+def rowcol_to_cell(row, col, row_abs=False, col_abs=False):
+    """Convert numeric row/col notation to an Excel cell reference string in
+    A1 notation.
+
+    """
+    assert 0 <= row < MAX_ROW # MAX_ROW counts from 1
+    assert 0 <= col < MAX_COL # MAX_COL counts from 1
+    d = col // 26
+    m = col % 26
+    chr1 = ""    # Most significant character in AA1
+    if row_abs:
+        row_abs = '$'
+    else:
+        row_abs = ''
+    if col_abs:
+        col_abs = '$'
+    else:
+        col_abs = ''
+    if d > 0:
+        chr1 = chr(ord('A') + d  - 1)
+    chr2 = chr(ord('A') + m)
+    # Zero index to 1-index
+    return col_abs + chr1 + chr2 + row_abs + str(row + 1)
+
+def rowcol_pair_to_cellrange(row1, col1, row2, col2,
+    row1_abs=False, col1_abs=False, row2_abs=False, col2_abs=False):
+    """Convert two (row,column) pairs
+    into a cell range string in A1:B2 notation.
+
+    Returns: cell range string
+    """
+    assert row1 <= row2
+    assert col1 <= col2
+    return (
+        rowcol_to_cell(row1, col1, row1_abs, col1_abs)
+        + ":"
+        + rowcol_to_cell(row2, col2, row2_abs, col2_abs)
+        )
+
+def cellrange_to_rowcol_pair(cellrange):
+    """Convert cell range string in A1 notation to numeric row/col
+    pair.
+
+    Returns: row1, col1, row2, col2
+
+    """
+    cellrange = cellrange.upper()
+    # Convert a row range: '1:3'
+    res = _re_row_range.match(cellrange)
+    if res:
+        row1 = int(res.group(1)) - 1
+        col1 = 0
+        row2 = int(res.group(2)) - 1
+        col2 = -1
+        return row1, col1, row2, col2
+    # Convert a column range: 'A:A' or 'B:G'.
+    # A range such as A:A is equivalent to A1:A16384, so add rows as required
+    res = _re_col_range.match(cellrange)
+    if res:
+        col1 = col_by_name(res.group(1).upper())
+        row1 = 0
+        col2 = col_by_name(res.group(2).upper())
+        row2 = -1
+        return row1, col1, row2, col2
+    # Convert a cell range: 'A1:B7'
+    res = _re_cell_range.match(cellrange)
+    if res:
+        row1, col1 = cell_to_rowcol2(res.group(1))
+        row2, col2 = cell_to_rowcol2(res.group(2))
+        return row1, col1, row2, col2
+    # Convert a cell reference: 'A1' or 'AD2000'
+    res = _re_cell_ref.match(cellrange)
+    if res:
+        row1, col1 = cell_to_rowcol2(res.group(1))
+        return row1, col1, row1, col1
+    raise Exception("Unknown cell reference %s" % (cell))
+
+
+def cell_to_packed_rowcol(cell):
+    """ pack row and column into the required 4 byte format """
+    row, col, row_abs, col_abs = cell_to_rowcol(cell)
+    if col >= MAX_COL:
+        raise Exception("Column %s greater than IV in formula" % cell)
+    if row >= MAX_ROW: # this for BIFF8. for BIFF7 available 2^14
+        raise Exception("Row %s greater than %d in formula" % (cell, MAX_ROW))
+    col |= int(not row_abs) << 15
+    col |= int(not col_abs) << 14
+    return row, col
+
+# === sheetname functions ===
+
+def valid_sheet_name(sheet_name):
+    if sheet_name == u"" or sheet_name[0] == u"'" or len(sheet_name) > 31:
+        return False
+    for c in sheet_name:
+        if c in u"[]:\\?/*\x00":
+            return False
+    return True
+
+def quote_sheet_name(unquoted_sheet_name):
+    if not valid_sheet_name(unquoted_sheet_name):
+        raise Exception(
+            'attempt to quote an invalid worksheet name %r' % unquoted_sheet_name)
+    return u"'" + unquoted_sheet_name.replace(u"'", u"''") + u"'"
diff --git a/tablib/packages/xlwt/Workbook.py b/tablib/packages/xlwt/Workbook.py
new file mode 100644
index 0000000..b24282b
--- /dev/null
+++ b/tablib/packages/xlwt/Workbook.py
@@ -0,0 +1,636 @@
+# -*- coding: windows-1252 -*-
+'''
+Record Order in BIFF8
+  Workbook Globals Substream
+      BOF Type = workbook globals
+      Interface Header
+      MMS
+      Interface End
+      WRITEACCESS
+      CODEPAGE
+      DSF
+      TABID
+      FNGROUPCOUNT
+      Workbook Protection Block
+            WINDOWPROTECT
+            PROTECT
+            PASSWORD
+            PROT4REV
+            PROT4REVPASS
+      BACKUP
+      HIDEOBJ
+      WINDOW1
+      DATEMODE
+      PRECISION
+      REFRESHALL
+      BOOKBOOL
+      FONT +
+      FORMAT *
+      XF +
+      STYLE +
+    ? PALETTE
+      USESELFS
+
+      BOUNDSHEET +
+
+      COUNTRY
+    ? Link Table
+      SST
+      ExtSST
+      EOF
+'''
+
+import BIFFRecords
+import Style
+
+class Workbook(object):
+
+    #################################################################
+    ## Constructor
+    #################################################################
+    def __init__(self, encoding='ascii', style_compression=0):
+        self.encoding = encoding
+        self.__owner = 'None'
+        self.__country_code = None # 0x07 is Russia :-)
+        self.__wnd_protect = 0
+        self.__obj_protect = 0
+        self.__protect = 0
+        self.__backup_on_save = 0
+        # for WINDOW1 record
+        self.__hpos_twips = 0x01E0
+        self.__vpos_twips = 0x005A
+        self.__width_twips = 0x3FCF
+        self.__height_twips = 0x2A4E
+
+        self.__active_sheet = 0
+        self.__first_tab_index = 0
+        self.__selected_tabs = 0x01
+        self.__tab_width_twips = 0x0258
+
+        self.__wnd_hidden = 0
+        self.__wnd_mini = 0
+        self.__hscroll_visible = 1
+        self.__vscroll_visible = 1
+        self.__tabs_visible = 1
+
+        self.__styles = Style.StyleCollection(style_compression)
+
+        self.__dates_1904 = 0
+        self.__use_cell_values = 1
+
+        self.__sst = BIFFRecords.SharedStringTable(self.encoding)
+
+        self.__worksheets = []
+        self.__worksheet_idx_from_name = {}
+        self.__sheet_refs = {}
+        self._supbook_xref = {}
+        self._xcall_xref = {}
+        self._ownbook_supbookx = None
+        self._ownbook_supbook_ref = None
+        self._xcall_supbookx = None
+        self._xcall_supbook_ref = None
+
+
+
+    #################################################################
+    ## Properties, "getters", "setters"
+    #################################################################
+
+    def get_style_stats(self):
+        return self.__styles.stats[:]
+
+    def set_owner(self, value):
+        self.__owner = value
+
+    def get_owner(self):
+        return self.__owner
+
+    owner = property(get_owner, set_owner)
+
+    #################################################################
+
+    def set_country_code(self, value):
+        self.__country_code = value
+
+    def get_country_code(self):
+        return self.__country_code
+
+    country_code = property(get_country_code, set_country_code)
+
+    #################################################################
+
+    def set_wnd_protect(self, value):
+        self.__wnd_protect = int(value)
+
+    def get_wnd_protect(self):
+        return bool(self.__wnd_protect)
+
+    wnd_protect = property(get_wnd_protect, set_wnd_protect)
+
+    #################################################################
+
+    def set_obj_protect(self, value):
+        self.__obj_protect = int(value)
+
+    def get_obj_protect(self):
+        return bool(self.__obj_protect)
+
+    obj_protect = property(get_obj_protect, set_obj_protect)
+
+    #################################################################
+
+    def set_protect(self, value):
+        self.__protect = int(value)
+
+    def get_protect(self):
+        return bool(self.__protect)
+
+    protect = property(get_protect, set_protect)
+
+    #################################################################
+
+    def set_backup_on_save(self, value):
+        self.__backup_on_save = int(value)
+
+    def get_backup_on_save(self):
+        return bool(self.__backup_on_save)
+
+    backup_on_save = property(get_backup_on_save, set_backup_on_save)
+
+    #################################################################
+
+    def set_hpos(self, value):
+        self.__hpos_twips = value & 0xFFFF
+
+    def get_hpos(self):
+        return self.__hpos_twips
+
+    hpos = property(get_hpos, set_hpos)
+
+    #################################################################
+
+    def set_vpos(self, value):
+        self.__vpos_twips = value & 0xFFFF
+
+    def get_vpos(self):
+        return self.__vpos_twips
+
+    vpos = property(get_vpos, set_vpos)
+
+    #################################################################
+
+    def set_width(self, value):
+        self.__width_twips = value & 0xFFFF
+
+    def get_width(self):
+        return self.__width_twips
+
+    width = property(get_width, set_width)
+
+    #################################################################
+
+    def set_height(self, value):
+        self.__height_twips = value & 0xFFFF
+
+    def get_height(self):
+        return self.__height_twips
+
+    height = property(get_height, set_height)
+
+    #################################################################
+
+    def set_active_sheet(self, value):
+        self.__active_sheet = value & 0xFFFF
+        self.__first_tab_index = self.__active_sheet
+
+    def get_active_sheet(self):
+        return self.__active_sheet
+
+    active_sheet = property(get_active_sheet, set_active_sheet)
+
+    #################################################################
+
+    def set_tab_width(self, value):
+        self.__tab_width_twips = value & 0xFFFF
+
+    def get_tab_width(self):
+        return self.__tab_width_twips
+
+    tab_width = property(get_tab_width, set_tab_width)
+
+    #################################################################
+
+    def set_wnd_visible(self, value):
+        self.__wnd_hidden = int(not value)
+
+    def get_wnd_visible(self):
+        return not bool(self.__wnd_hidden)
+
+    wnd_visible = property(get_wnd_visible, set_wnd_visible)
+
+    #################################################################
+
+    def set_wnd_mini(self, value):
+        self.__wnd_mini = int(value)
+
+    def get_wnd_mini(self):
+        return bool(self.__wnd_mini)
+
+    wnd_mini = property(get_wnd_mini, set_wnd_mini)
+
+    #################################################################
+
+    def set_hscroll_visible(self, value):
+        self.__hscroll_visible = int(value)
+
+    def get_hscroll_visible(self):
+        return bool(self.__hscroll_visible)
+
+    hscroll_visible = property(get_hscroll_visible, set_hscroll_visible)
+
+    #################################################################
+
+    def set_vscroll_visible(self, value):
+        self.__vscroll_visible = int(value)
+
+    def get_vscroll_visible(self):
+        return bool(self.__vscroll_visible)
+
+    vscroll_visible = property(get_vscroll_visible, set_vscroll_visible)
+
+    #################################################################
+
+    def set_tabs_visible(self, value):
+        self.__tabs_visible = int(value)
+
+    def get_tabs_visible(self):
+        return bool(self.__tabs_visible)
+
+    tabs_visible = property(get_tabs_visible, set_tabs_visible)
+
+    #################################################################
+
+    def set_dates_1904(self, value):
+        self.__dates_1904 = int(value)
+
+    def get_dates_1904(self):
+        return bool(self.__dates_1904)
+
+    dates_1904 = property(get_dates_1904, set_dates_1904)
+
+    #################################################################
+
+    def set_use_cell_values(self, value):
+        self.__use_cell_values = int(value)
+
+    def get_use_cell_values(self):
+        return bool(self.__use_cell_values)
+
+    use_cell_values = property(get_use_cell_values, set_use_cell_values)
+
+    #################################################################
+
+    def get_default_style(self):
+        return self.__styles.default_style
+
+    default_style = property(get_default_style)
+
+    ##################################################################
+    ## Methods
+    ##################################################################
+
+    def add_style(self, style):
+        return self.__styles.add(style)
+
+    def add_str(self, s):
+        return self.__sst.add_str(s)
+
+    def del_str(self, sst_idx):
+        self.__sst.del_str(sst_idx)
+
+    def str_index(self, s):
+        return self.__sst.str_index(s)
+
+    def add_sheet(self, sheetname, cell_overwrite_ok=False):
+        import Worksheet, Utils
+        if not isinstance(sheetname, unicode):
+            sheetname = sheetname.decode(self.encoding)
+        if not Utils.valid_sheet_name(sheetname):
+            raise Exception("invalid worksheet name %r" % sheetname)
+        lower_name = sheetname.lower()
+        if lower_name in self.__worksheet_idx_from_name:
+            raise Exception("duplicate worksheet name %r" % sheetname)
+        self.__worksheet_idx_from_name[lower_name] = len(self.__worksheets)
+        self.__worksheets.append(Worksheet.Worksheet(sheetname, self, cell_overwrite_ok))
+        return self.__worksheets[-1]
+
+    def get_sheet(self, sheetnum):
+        return self.__worksheets[sheetnum]
+
+    def raise_bad_sheetname(self, sheetname):
+        raise Exception("Formula: unknown sheet name %s" % sheetname)
+
+    def convert_sheetindex(self, strg_ref, n_sheets):
+        idx = int(strg_ref)
+        if 0 <= idx < n_sheets:
+            return idx
+        msg = "Formula: sheet index (%s) >= number of sheets (%d)" % (strg_ref, n_sheets)
+        raise Exception(msg)
+
+    def _get_supbook_index(self, tag):
+        if tag in self._supbook_xref:
+            return self._supbook_xref[tag]
+        self._supbook_xref[tag] = idx = len(self._supbook_xref)
+        return idx
+
+    def setup_ownbook(self):
+        self._ownbook_supbookx = self._get_supbook_index(('ownbook', 0))
+        self._ownbook_supbook_ref = None
+        reference = (self._ownbook_supbookx, 0xFFFE, 0xFFFE)
+        if reference in self.__sheet_refs:
+            raise Exception("can't happen")
+        self.__sheet_refs[reference] = self._ownbook_supbook_ref = len(self.__sheet_refs)
+
+    def setup_xcall(self):
+        self._xcall_supbookx = self._get_supbook_index(('xcall', 0))
+        self._xcall_supbook_ref = None
+        reference = (self._xcall_supbookx, 0xFFFE, 0xFFFE)
+        if reference in self.__sheet_refs:
+            raise Exception("can't happen")
+        self.__sheet_refs[reference] = self._xcall_supbook_ref = len(self.__sheet_refs)
+
+    def add_sheet_reference(self, formula):
+        patches = []
+        n_sheets = len(self.__worksheets)
+        sheet_refs, xcall_refs = formula.get_references()
+
+        for ref0, ref1, offset in sheet_refs:
+            if not ref0.isdigit():
+                try:
+                    ref0n = self.__worksheet_idx_from_name[ref0.lower()]
+                except KeyError:
+                    self.raise_bad_sheetname(ref0)
+            else:
+                ref0n = self.convert_sheetindex(ref0, n_sheets)
+            if ref1 == ref0:
+                ref1n = ref0n
+            elif not ref1.isdigit():
+                try:
+                    ref1n = self.__worksheet_idx_from_name[ref1.lower()]
+                except KeyError:
+                    self.raise_bad_sheetname(ref1)
+            else:
+                ref1n = self.convert_sheetindex(ref1, n_sheets)
+            if ref1n < ref0n:
+                msg = "Formula: sheets out of order; %r:%r -> (%d, %d)" \
+                    % (ref0, ref1, ref0n, ref1n)
+                raise Exception(msg)
+            if self._ownbook_supbookx is None:
+                self.setup_ownbook()
+            reference = (self._ownbook_supbookx, ref0n, ref1n)
+            if reference in self.__sheet_refs:
+                patches.append((offset, self.__sheet_refs[reference]))
+            else:
+                nrefs = len(self.__sheet_refs)
+                if nrefs > 65535:
+                    raise Exception('More than 65536 inter-sheet references')
+                self.__sheet_refs[reference] = nrefs
+                patches.append((offset, nrefs))
+
+        for funcname, offset in xcall_refs:
+            if self._ownbook_supbookx is None:
+                self.setup_ownbook()
+            if self._xcall_supbookx is None:
+                self.setup_xcall()
+            # print funcname, self._supbook_xref
+            patches.append((offset, self._xcall_supbook_ref))
+            if not isinstance(funcname, unicode):
+                funcname = funcname.decode(self.encoding)
+            if funcname in self._xcall_xref:
+                idx = self._xcall_xref[funcname]
+            else:
+                self._xcall_xref[funcname] = idx = len(self._xcall_xref)
+            patches.append((offset + 2, idx + 1))
+
+        formula.patch_references(patches)
+
+    ##################################################################
+    ## BIFF records generation
+    ##################################################################
+
+    def __bof_rec(self):
+        return BIFFRecords.Biff8BOFRecord(BIFFRecords.Biff8BOFRecord.BOOK_GLOBAL).get()
+
+    def __eof_rec(self):
+        return BIFFRecords.EOFRecord().get()
+
+    def __intf_hdr_rec(self):
+        return BIFFRecords.InteraceHdrRecord().get()
+
+    def __intf_end_rec(self):
+        return BIFFRecords.InteraceEndRecord().get()
+
+    def __intf_mms_rec(self):
+        return BIFFRecords.MMSRecord().get()
+
+    def __write_access_rec(self):
+        return BIFFRecords.WriteAccessRecord(self.__owner).get()
+
+    def __wnd_protect_rec(self):
+        return BIFFRecords.WindowProtectRecord(self.__wnd_protect).get()
+
+    def __obj_protect_rec(self):
+        return BIFFRecords.ObjectProtectRecord(self.__obj_protect).get()
+
+    def __protect_rec(self):
+        return BIFFRecords.ProtectRecord(self.__protect).get()
+
+    def __password_rec(self):
+        return BIFFRecords.PasswordRecord().get()
+
+    def __prot4rev_rec(self):
+        return BIFFRecords.Prot4RevRecord().get()
+
+    def __prot4rev_pass_rec(self):
+        return BIFFRecords.Prot4RevPassRecord().get()
+
+    def __backup_rec(self):
+        return BIFFRecords.BackupRecord(self.__backup_on_save).get()
+
+    def __hide_obj_rec(self):
+        return BIFFRecords.HideObjRecord().get()
+
+    def __window1_rec(self):
+        flags = 0
+        flags |= (self.__wnd_hidden) << 0
+        flags |= (self.__wnd_mini) << 1
+        flags |= (self.__hscroll_visible) << 3
+        flags |= (self.__vscroll_visible) << 4
+        flags |= (self.__tabs_visible) << 5
+
+        return BIFFRecords.Window1Record(self.__hpos_twips, self.__vpos_twips,
+                                self.__width_twips, self.__height_twips,
+                                flags,
+                                self.__active_sheet, self.__first_tab_index,
+                                self.__selected_tabs, self.__tab_width_twips).get()
+
+    def __codepage_rec(self):
+        return BIFFRecords.CodepageBiff8Record().get()
+
+    def __country_rec(self):
+        if not self.__country_code:
+            return ''
+        return BIFFRecords.CountryRecord(self.__country_code, self.__country_code).get()
+
+    def __dsf_rec(self):
+        return BIFFRecords.DSFRecord().get()
+
+    def __tabid_rec(self):
+        return BIFFRecords.TabIDRecord(len(self.__worksheets)).get()
+
+    def __fngroupcount_rec(self):
+        return BIFFRecords.FnGroupCountRecord().get()
+
+    def __datemode_rec(self):
+        return BIFFRecords.DateModeRecord(self.__dates_1904).get()
+
+    def __precision_rec(self):
+        return BIFFRecords.PrecisionRecord(self.__use_cell_values).get()
+
+    def __refresh_all_rec(self):
+        return BIFFRecords.RefreshAllRecord().get()
+
+    def __bookbool_rec(self):
+        return BIFFRecords.BookBoolRecord().get()
+
+    def __all_fonts_num_formats_xf_styles_rec(self):
+        return self.__styles.get_biff_data()
+
+    def __palette_rec(self):
+        result = ''
+        return result
+
+    def __useselfs_rec(self):
+        return BIFFRecords.UseSelfsRecord().get()
+
+    def __boundsheets_rec(self, data_len_before, data_len_after, sheet_biff_lens):
+        #  .................................
+        # BOUNDSEHEET0
+        # BOUNDSEHEET1
+        # BOUNDSEHEET2
+        # ..................................
+        # WORKSHEET0
+        # WORKSHEET1
+        # WORKSHEET2
+        boundsheets_len = 0
+        for sheet in self.__worksheets:
+            boundsheets_len += len(BIFFRecords.BoundSheetRecord(
+                0x00L, sheet.visibility, sheet.name, self.encoding
+                ).get())
+
+        start = data_len_before + boundsheets_len + data_len_after
+
+        result = ''
+        for sheet_biff_len,  sheet in zip(sheet_biff_lens, self.__worksheets):
+            result += BIFFRecords.BoundSheetRecord(
+                start, sheet.visibility, sheet.name, self.encoding
+                ).get()
+            start += sheet_biff_len
+        return result
+
+    def __all_links_rec(self):
+        pieces = []
+        temp = [(idx, tag) for tag, idx in self._supbook_xref.items()]
+        temp.sort()
+        for idx, tag in temp:
+            stype, snum = tag
+            if stype == 'ownbook':
+                rec = BIFFRecords.InternalReferenceSupBookRecord(len(self.__worksheets)).get()
+                pieces.append(rec)
+            elif stype == 'xcall':
+                rec = BIFFRecords.XcallSupBookRecord().get()
+                pieces.append(rec)
+                temp = [(idx, name) for name, idx in self._xcall_xref.items()]
+                temp.sort()
+                for idx, name in temp:
+                    rec = BIFFRecords.ExternnameRecord(
+                        options=0, index=0, name=name, fmla='\x02\x00\x1c\x17').get()
+                    pieces.append(rec)
+            else:
+                raise Exception('unknown supbook stype %r' % stype)
+        if len(self.__sheet_refs) > 0:
+            # get references in index order
+            temp = [(idx, ref) for ref, idx in self.__sheet_refs.items()]
+            temp.sort()
+            temp = [ref for idx, ref in temp]
+            externsheet_record = BIFFRecords.ExternSheetRecord(temp).get()
+            pieces.append(externsheet_record)
+        return ''.join(pieces)
+
+    def __sst_rec(self):
+        return self.__sst.get_biff_record()
+
+    def __ext_sst_rec(self, abs_stream_pos):
+        return ''
+        #return BIFFRecords.ExtSSTRecord(abs_stream_pos, self.sst_record.str_placement,
+        #self.sst_record.portions_len).get()
+
+    def get_biff_data(self):
+        before = ''
+        before += self.__bof_rec()
+        before += self.__intf_hdr_rec()
+        before += self.__intf_mms_rec()
+        before += self.__intf_end_rec()
+        before += self.__write_access_rec()
+        before += self.__codepage_rec()
+        before += self.__dsf_rec()
+        before += self.__tabid_rec()
+        before += self.__fngroupcount_rec()
+        before += self.__wnd_protect_rec()
+        before += self.__protect_rec()
+        before += self.__obj_protect_rec()
+        before += self.__password_rec()
+        before += self.__prot4rev_rec()
+        before += self.__prot4rev_pass_rec()
+        before += self.__backup_rec()
+        before += self.__hide_obj_rec()
+        before += self.__window1_rec()
+        before += self.__datemode_rec()
+        before += self.__precision_rec()
+        before += self.__refresh_all_rec()
+        before += self.__bookbool_rec()
+        before += self.__all_fonts_num_formats_xf_styles_rec()
+        before += self.__palette_rec()
+        before += self.__useselfs_rec()
+
+        country            = self.__country_rec()
+        all_links          = self.__all_links_rec()
+
+        shared_str_table   = self.__sst_rec()
+        after = country + all_links + shared_str_table
+
+        ext_sst = self.__ext_sst_rec(0) # need fake cause we need calc stream pos
+        eof = self.__eof_rec()
+
+        self.__worksheets[self.__active_sheet].selected = True
+        sheets = ''
+        sheet_biff_lens = []
+        for sheet in self.__worksheets:
+            data = sheet.get_biff_data()
+            sheets += data
+            sheet_biff_lens.append(len(data))
+
+        bundlesheets = self.__boundsheets_rec(len(before), len(after)+len(ext_sst)+len(eof), sheet_biff_lens)
+
+        sst_stream_pos = len(before) + len(bundlesheets) + len(country)  + len(all_links)
+        ext_sst = self.__ext_sst_rec(sst_stream_pos)
+
+        return before + bundlesheets + after + ext_sst + eof + sheets
+
+    def save(self, filename):
+        import CompoundDoc
+
+        doc = CompoundDoc.XlsDoc()
+        doc.save(filename, self.get_biff_data())
+
+
diff --git a/tablib/packages/xlwt/Worksheet.py b/tablib/packages/xlwt/Worksheet.py
new file mode 100644
index 0000000..ff36f1d
--- /dev/null
+++ b/tablib/packages/xlwt/Worksheet.py
@@ -0,0 +1,1297 @@
+# -*- coding: windows-1252 -*-
+'''
+            BOF
+            UNCALCED
+            INDEX
+            Calculation Settings Block
+            PRINTHEADERS
+            PRINTGRIDLINES
+            GRIDSET
+            GUTS
+            DEFAULTROWHEIGHT
+            WSBOOL
+            Page Settings Block
+            Worksheet Protection Block
+            DEFCOLWIDTH
+            COLINFO
+            SORT
+            DIMENSIONS
+            Row Blocks
+            WINDOW2
+            SCL
+            PANE
+            SELECTION
+            STANDARDWIDTH
+            MERGEDCELLS
+            LABELRANGES
+            PHONETIC
+            Conditional Formatting Table
+            Hyperlink Table
+            Data Validity Table
+            SHEETLAYOUT (BIFF8X only)
+            SHEETPROTECTION (BIFF8X only)
+            RANGEPROTECTION (BIFF8X only)
+            EOF
+'''
+
+import BIFFRecords
+import Bitmap
+import Formatting
+import Style
+import tempfile
+
+
+class Worksheet(object):
+    from Workbook import Workbook
+
+    #################################################################
+    ## Constructor
+    #################################################################
+    def __init__(self, sheetname, parent_book, cell_overwrite_ok=False):
+        import Row
+        self.Row = Row.Row
+
+        import Column
+        self.Column = Column.Column
+
+        self.__name = sheetname
+        self.__parent = parent_book
+        self._cell_overwrite_ok = cell_overwrite_ok
+
+        self.__rows = {}
+        self.__cols = {}
+        self.__merged_ranges = []
+        self.__bmp_rec = ''
+
+        self.__show_formulas = 0
+        self.__show_grid = 1
+        self.__show_headers = 1
+        self.__panes_frozen = 0
+        ### self.__show_empty_as_zero = 1 ### deprecated with extreme prejudice 2009-05-19
+        self.show_zero_values = 1
+        self.__auto_colour_grid = 1
+        self.__cols_right_to_left = 0
+        self.__show_outline = 1
+        self.__remove_splits = 0
+        self.__selected = 0
+        # RED HERRING ALERT: "sheet_visible" is a clone of the "selected" attribute.
+        # Typically a workbook created by the Excel UI will have one sheet
+        # (the sheet that was selected when the user saved it)
+        # with both bits set to 1, and all other sheets will have both
+        # bits set to 0. The true visibility of the sheet is found in the "visibility"
+        # attribute obtained from the BOUNDSHEET record.
+        self.__sheet_visible = 0
+        self.__page_preview = 0
+
+        self.__first_visible_row = 0
+        self.__first_visible_col = 0
+        self.__grid_colour = 0x40
+        self.__preview_magn = 60 # percent
+        self.__normal_magn = 100 # percent
+
+        self.visibility = 0 # from/to BOUNDSHEET record.
+
+        self.__vert_split_pos = None
+        self.__horz_split_pos = None
+        self.__vert_split_first_visible = None
+        self.__horz_split_first_visible = None
+        self.__split_active_pane = None
+
+        self.__row_gut_width = 0
+        self.__col_gut_height = 0
+
+        self.__show_auto_page_breaks = 1
+        self.__dialogue_sheet = 0
+        self.__auto_style_outline = 0
+        self.__outline_below = 0
+        self.__outline_right = 0
+        self.__fit_num_pages = 0
+        self.__show_row_outline = 1
+        self.__show_col_outline = 1
+        self.__alt_expr_eval = 0
+        self.__alt_formula_entries = 0
+
+        self.__row_default_height = 0x00FF
+        self.row_default_height_mismatch = 0
+        self.row_default_hidden = 0
+        self.row_default_space_above = 0
+        self.row_default_space_below = 0
+
+        self.__col_default_width = 0x0008
+
+        self.__calc_mode = 1
+        self.__calc_count = 0x0064
+        self.__RC_ref_mode = 1
+        self.__iterations_on = 0
+        self.__delta = 0.001
+        self.__save_recalc = 0
+
+        self.__print_headers = 0
+        self.__print_grid = 0
+        self.__grid_set = 1
+        self.__vert_page_breaks = []
+        self.__horz_page_breaks = []
+        self.__header_str = '&P'
+        self.__footer_str = '&F'
+        self.__print_centered_vert = 0
+        self.__print_centered_horz = 1
+        self.__left_margin = 0.3 #0.5
+        self.__right_margin = 0.3 #0.5
+        self.__top_margin = 0.61 #1.0
+        self.__bottom_margin = 0.37 #1.0
+        self.__paper_size_code = 9 # A4
+        self.__print_scaling = 100
+        self.__start_page_number = 1
+        self.__fit_width_to_pages = 1
+        self.__fit_height_to_pages = 1
+        self.__print_in_rows = 1
+        self.__portrait = 1
+        self.__print_not_colour = 0
+        self.__print_draft = 0
+        self.__print_notes = 0
+        self.__print_notes_at_end = 0
+        self.__print_omit_errors = 0
+        self.__print_hres = 0x012C # 300 dpi
+        self.__print_vres = 0x012C # 300 dpi
+        self.__header_margin = 0.1
+        self.__footer_margin = 0.1
+        self.__copies_num = 1
+
+        self.__wnd_protect = 0
+        self.__obj_protect = 0
+        self.__protect = 0
+        self.__scen_protect = 0
+        self.__password = ''
+
+        self.last_used_row = 0
+        self.first_used_row = 65535
+        self.last_used_col = 0
+        self.first_used_col = 255
+        self.row_tempfile = None
+        self.__flushed_rows = {}
+        self.__row_visible_levels = 0
+
+    #################################################################
+    ## Properties, "getters", "setters"
+    #################################################################
+
+    def set_name(self, value):
+        self.__name = value
+
+    def get_name(self):
+        return self.__name
+
+    name = property(get_name, set_name)
+
+    #################################################################
+
+    def get_parent(self):
+        return self.__parent
+
+    parent = property(get_parent)
+
+    #################################################################
+
+    def get_rows(self):
+        return self.__rows
+
+    rows = property(get_rows)
+
+    #################################################################
+
+    def get_cols(self):
+        return self.__cols
+
+    cols = property(get_cols)
+
+    #################################################################
+
+    def get_merged_ranges(self):
+        return self.__merged_ranges
+
+    merged_ranges = property(get_merged_ranges)
+
+    #################################################################
+
+    def get_bmp_rec(self):
+        return self.__bmp_rec
+
+    bmp_rec = property(get_bmp_rec)
+
+    #################################################################
+
+    def set_show_formulas(self, value):
+        self.__show_formulas = int(value)
+
+    def get_show_formulas(self):
+        return bool(self.__show_formulas)
+
+    show_formulas = property(get_show_formulas, set_show_formulas)
+
+    #################################################################
+
+    def set_show_grid(self, value):
+        self.__show_grid = int(value)
+
+    def get_show_grid(self):
+        return bool(self.__show_grid)
+
+    show_grid = property(get_show_grid, set_show_grid)
+
+    #################################################################
+
+    def set_show_headers(self, value):
+        self.__show_headers = int(value)
+
+    def get_show_headers(self):
+        return bool(self.__show_headers)
+
+    show_headers = property(get_show_headers, set_show_headers)
+
+    #################################################################
+
+    def set_panes_frozen(self, value):
+        self.__panes_frozen = int(value)
+
+    def get_panes_frozen(self):
+        return bool(self.__panes_frozen)
+
+    panes_frozen = property(get_panes_frozen, set_panes_frozen)
+
+    #################################################################
+
+    ### def set_show_empty_as_zero(self, value):
+    ###     self.__show_empty_as_zero = int(value)
+
+    ### def get_show_empty_as_zero(self):
+    ###     return bool(self.__show_empty_as_zero)
+
+    ### show_empty_as_zero = property(get_show_empty_as_zero, set_show_empty_as_zero)
+
+    #################################################################
+
+    def set_auto_colour_grid(self, value):
+        self.__auto_colour_grid = int(value)
+
+    def get_auto_colour_grid(self):
+        return bool(self.__auto_colour_grid)
+
+    auto_colour_grid = property(get_auto_colour_grid, set_auto_colour_grid)
+
+    #################################################################
+
+    def set_cols_right_to_left(self, value):
+        self.__cols_right_to_left = int(value)
+
+    def get_cols_right_to_left(self):
+        return bool(self.__cols_right_to_left)
+
+    cols_right_to_left = property(get_cols_right_to_left, set_cols_right_to_left)
+
+    #################################################################
+
+    def set_show_outline(self, value):
+        self.__show_outline = int(value)
+
+    def get_show_outline(self):
+        return bool(self.__show_outline)
+
+    show_outline = property(get_show_outline, set_show_outline)
+
+    #################################################################
+
+    def set_remove_splits(self, value):
+        self.__remove_splits = int(value)
+
+    def get_remove_splits(self):
+        return bool(self.__remove_splits)
+
+    remove_splits = property(get_remove_splits, set_remove_splits)
+
+    #################################################################
+
+    def set_selected(self, value):
+        self.__selected = int(value)
+
+    def get_selected(self):
+        return bool(self.__selected)
+
+    selected = property(get_selected, set_selected)
+
+    #################################################################
+
+    def set_sheet_visible(self, value):
+        self.__sheet_visible = int(value)
+
+    def get_sheet_visible(self):
+        return bool(self.__sheet_visible)
+
+    sheet_visible = property(get_sheet_visible, set_sheet_visible)
+
+    #################################################################
+
+    def set_page_preview(self, value):
+        self.__page_preview = int(value)
+
+    def get_page_preview(self):
+        return bool(self.__page_preview)
+
+    page_preview = property(get_page_preview, set_page_preview)
+
+    #################################################################
+
+    def set_first_visible_row(self, value):
+        self.__first_visible_row = value
+
+    def get_first_visible_row(self):
+        return self.__first_visible_row
+
+    first_visible_row = property(get_first_visible_row, set_first_visible_row)
+
+    #################################################################
+
+    def set_first_visible_col(self, value):
+        self.__first_visible_col = value
+
+    def get_first_visible_col(self):
+        return self.__first_visible_col
+
+    first_visible_col = property(get_first_visible_col, set_first_visible_col)
+
+    #################################################################
+
+    def set_grid_colour(self, value):
+        self.__grid_colour = value
+
+    def get_grid_colour(self):
+        return self.__grid_colour
+
+    grid_colour = property(get_grid_colour, set_grid_colour)
+
+    #################################################################
+
+    def set_preview_magn(self, value):
+        self.__preview_magn = value
+
+    def get_preview_magn(self):
+        return self.__preview_magn
+
+    preview_magn = property(get_preview_magn, set_preview_magn)
+
+    #################################################################
+
+    def set_normal_magn(self, value):
+        self.__normal_magn = value
+
+    def get_normal_magn(self):
+        return self.__normal_magn
+
+    normal_magn = property(get_normal_magn, set_normal_magn)
+
+    #################################################################
+
+    def set_vert_split_pos(self, value):
+        self.__vert_split_pos = abs(value)
+
+    def get_vert_split_pos(self):
+        return self.__vert_split_pos
+
+    vert_split_pos = property(get_vert_split_pos, set_vert_split_pos)
+
+    #################################################################
+
+    def set_horz_split_pos(self, value):
+        self.__horz_split_pos = abs(value)
+
+    def get_horz_split_pos(self):
+        return self.__horz_split_pos
+
+    horz_split_pos = property(get_horz_split_pos, set_horz_split_pos)
+
+    #################################################################
+
+    def set_vert_split_first_visible(self, value):
+        self.__vert_split_first_visible = abs(value)
+
+    def get_vert_split_first_visible(self):
+        return self.__vert_split_first_visible
+
+    vert_split_first_visible = property(get_vert_split_first_visible, set_vert_split_first_visible)
+
+    #################################################################
+
+    def set_horz_split_first_visible(self, value):
+        self.__horz_split_first_visible = abs(value)
+
+    def get_horz_split_first_visible(self):
+        return self.__horz_split_first_visible
+
+    horz_split_first_visible = property(get_horz_split_first_visible, set_horz_split_first_visible)
+
+    #################################################################
+
+    #def set_split_active_pane(self, value):
+    #    self.__split_active_pane = abs(value) & 0x03
+    #
+    #def get_split_active_pane(self):
+    #    return self.__split_active_pane
+    #
+    #split_active_pane = property(get_split_active_pane, set_split_active_pane)
+
+    #################################################################
+
+    #def set_row_gut_width(self, value):
+    #    self.__row_gut_width = value
+    #
+    #def get_row_gut_width(self):
+    #    return self.__row_gut_width
+    #
+    #row_gut_width = property(get_row_gut_width, set_row_gut_width)
+    #
+    #################################################################
+    #
+    #def set_col_gut_height(self, value):
+    #    self.__col_gut_height = value
+    #
+    #def get_col_gut_height(self):
+    #    return self.__col_gut_height
+    #
+    #col_gut_height = property(get_col_gut_height, set_col_gut_height)
+    #
+    #################################################################
+
+    def set_show_auto_page_breaks(self, value):
+        self.__show_auto_page_breaks = int(value)
+
+    def get_show_auto_page_breaks(self):
+        return bool(self.__show_auto_page_breaks)
+
+    show_auto_page_breaks = property(get_show_auto_page_breaks, set_show_auto_page_breaks)
+
+    #################################################################
+
+    def set_dialogue_sheet(self, value):
+        self.__dialogue_sheet = int(value)
+
+    def get_dialogue_sheet(self):
+        return bool(self.__dialogue_sheet)
+
+    dialogue_sheet = property(get_dialogue_sheet, set_dialogue_sheet)
+
+    #################################################################
+
+    def set_auto_style_outline(self, value):
+        self.__auto_style_outline = int(value)
+
+    def get_auto_style_outline(self):
+        return bool(self.__auto_style_outline)
+
+    auto_style_outline = property(get_auto_style_outline, set_auto_style_outline)
+
+    #################################################################
+
+    def set_outline_below(self, value):
+        self.__outline_below = int(value)
+
+    def get_outline_below(self):
+        return bool(self.__outline_below)
+
+    outline_below = property(get_outline_below, set_outline_below)
+
+    #################################################################
+
+    def set_outline_right(self, value):
+        self.__outline_right = int(value)
+
+    def get_outline_right(self):
+        return bool(self.__outline_right)
+
+    outline_right = property(get_outline_right, set_outline_right)
+
+    #################################################################
+
+    def set_fit_num_pages(self, value):
+        self.__fit_num_pages = value
+
+    def get_fit_num_pages(self):
+        return self.__fit_num_pages
+
+    fit_num_pages = property(get_fit_num_pages, set_fit_num_pages)
+
+    #################################################################
+
+    def set_show_row_outline(self, value):
+        self.__show_row_outline = int(value)
+
+    def get_show_row_outline(self):
+        return bool(self.__show_row_outline)
+
+    show_row_outline = property(get_show_row_outline, set_show_row_outline)
+
+    #################################################################
+
+    def set_show_col_outline(self, value):
+        self.__show_col_outline = int(value)
+
+    def get_show_col_outline(self):
+        return bool(self.__show_col_outline)
+
+    show_col_outline = property(get_show_col_outline, set_show_col_outline)
+
+    #################################################################
+
+    def set_alt_expr_eval(self, value):
+        self.__alt_expr_eval = int(value)
+
+    def get_alt_expr_eval(self):
+        return bool(self.__alt_expr_eval)
+
+    alt_expr_eval = property(get_alt_expr_eval, set_alt_expr_eval)
+
+    #################################################################
+
+    def set_alt_formula_entries(self, value):
+        self.__alt_formula_entries = int(value)
+
+    def get_alt_formula_entries(self):
+        return bool(self.__alt_formula_entries)
+
+    alt_formula_entries = property(get_alt_formula_entries, set_alt_formula_entries)
+
+    #################################################################
+
+    def set_row_default_height(self, value):
+        self.__row_default_height = value
+
+    def get_row_default_height(self):
+        return self.__row_default_height
+
+    row_default_height = property(get_row_default_height, set_row_default_height)
+
+    #################################################################
+
+    def set_col_default_width(self, value):
+        self.__col_default_width = value
+
+    def get_col_default_width(self):
+        return self.__col_default_width
+
+    col_default_width = property(get_col_default_width, set_col_default_width)
+
+    #################################################################
+
+    def set_calc_mode(self, value):
+        self.__calc_mode = value & 0x03
+
+    def get_calc_mode(self):
+        return self.__calc_mode
+
+    calc_mode = property(get_calc_mode, set_calc_mode)
+
+    #################################################################
+
+    def set_calc_count(self, value):
+        self.__calc_count = value
+
+    def get_calc_count(self):
+        return self.__calc_count
+
+    calc_count = property(get_calc_count, set_calc_count)
+
+    #################################################################
+
+    def set_RC_ref_mode(self, value):
+        self.__RC_ref_mode = int(value)
+
+    def get_RC_ref_mode(self):
+        return bool(self.__RC_ref_mode)
+
+    RC_ref_mode = property(get_RC_ref_mode, set_RC_ref_mode)
+
+    #################################################################
+
+    def set_iterations_on(self, value):
+        self.__iterations_on = int(value)
+
+    def get_iterations_on(self):
+        return bool(self.__iterations_on)
+
+    iterations_on = property(get_iterations_on, set_iterations_on)
+
+    #################################################################
+
+    def set_delta(self, value):
+        self.__delta = value
+
+    def get_delta(self):
+        return self.__delta
+
+    delta = property(get_delta, set_delta)
+
+    #################################################################
+
+    def set_save_recalc(self, value):
+        self.__save_recalc = int(value)
+
+    def get_save_recalc(self):
+        return bool(self.__save_recalc)
+
+    save_recalc = property(get_save_recalc, set_save_recalc)
+
+    #################################################################
+
+    def set_print_headers(self, value):
+        self.__print_headers = int(value)
+
+    def get_print_headers(self):
+        return bool(self.__print_headers)
+
+    print_headers = property(get_print_headers, set_print_headers)
+
+    #################################################################
+
+    def set_print_grid(self, value):
+        self.__print_grid = int(value)
+
+    def get_print_grid(self):
+        return bool(self.__print_grid)
+
+    print_grid = property(get_print_grid, set_print_grid)
+
+    #################################################################
+    #
+    #def set_grid_set(self, value):
+    #    self.__grid_set = int(value)
+    #
+    #def get_grid_set(self):
+    #    return bool(self.__grid_set)
+    #
+    #grid_set = property(get_grid_set, set_grid_set)
+    #
+    #################################################################
+
+    def set_vert_page_breaks(self, value):
+        self.__vert_page_breaks = value
+
+    def get_vert_page_breaks(self):
+        return self.__vert_page_breaks
+
+    vert_page_breaks = property(get_vert_page_breaks, set_vert_page_breaks)
+
+    #################################################################
+
+    def set_horz_page_breaks(self, value):
+        self.__horz_page_breaks = value
+
+    def get_horz_page_breaks(self):
+        return self.__horz_page_breaks
+
+    horz_page_breaks = property(get_horz_page_breaks, set_horz_page_breaks)
+
+    #################################################################
+
+    def set_header_str(self, value):
+        if isinstance(value, str):
+            value = unicode(value, self.__parent.encoding)
+        self.__header_str = value
+
+    def get_header_str(self):
+        return self.__header_str
+
+    header_str = property(get_header_str, set_header_str)
+
+    #################################################################
+
+    def set_footer_str(self, value):
+        if isinstance(value, str):
+            value = unicode(value, self.__parent.encoding)
+        self.__footer_str = value
+
+    def get_footer_str(self):
+        return self.__footer_str
+
+    footer_str = property(get_footer_str, set_footer_str)
+
+    #################################################################
+
+    def set_print_centered_vert(self, value):
+        self.__print_centered_vert = int(value)
+
+    def get_print_centered_vert(self):
+        return bool(self.__print_centered_vert)
+
+    print_centered_vert = property(get_print_centered_vert, set_print_centered_vert)
+
+    #################################################################
+
+    def set_print_centered_horz(self, value):
+        self.__print_centered_horz = int(value)
+
+    def get_print_centered_horz(self):
+        return bool(self.__print_centered_horz)
+
+    print_centered_horz = property(get_print_centered_horz, set_print_centered_horz)
+
+    #################################################################
+
+    def set_left_margin(self, value):
+        self.__left_margin = value
+
+    def get_left_margin(self):
+        return self.__left_margin
+
+    left_margin = property(get_left_margin, set_left_margin)
+
+    #################################################################
+
+    def set_right_margin(self, value):
+        self.__right_margin = value
+
+    def get_right_margin(self):
+        return self.__right_margin
+
+    right_margin = property(get_right_margin, set_right_margin)
+
+    #################################################################
+
+    def set_top_margin(self, value):
+        self.__top_margin = value
+
+    def get_top_margin(self):
+        return self.__top_margin
+
+    top_margin = property(get_top_margin, set_top_margin)
+
+    #################################################################
+
+    def set_bottom_margin(self, value):
+        self.__bottom_margin = value
+
+    def get_bottom_margin(self):
+        return self.__bottom_margin
+
+    bottom_margin = property(get_bottom_margin, set_bottom_margin)
+
+    #################################################################
+
+    def set_paper_size_code(self, value):
+        self.__paper_size_code = value
+
+    def get_paper_size_code(self):
+        return self.__paper_size_code
+
+    paper_size_code = property(get_paper_size_code, set_paper_size_code)
+
+    #################################################################
+
+    def set_print_scaling(self, value):
+        self.__print_scaling = value
+
+    def get_print_scaling(self):
+        return self.__print_scaling
+
+    print_scaling = property(get_print_scaling, set_print_scaling)
+
+    #################################################################
+
+    def set_start_page_number(self, value):
+        self.__start_page_number = value
+
+    def get_start_page_number(self):
+        return self.__start_page_number
+
+    start_page_number = property(get_start_page_number, set_start_page_number)
+
+    #################################################################
+
+    def set_fit_width_to_pages(self, value):
+        self.__fit_width_to_pages = value
+
+    def get_fit_width_to_pages(self):
+        return self.__fit_width_to_pages
+
+    fit_width_to_pages = property(get_fit_width_to_pages, set_fit_width_to_pages)
+
+    #################################################################
+
+    def set_fit_height_to_pages(self, value):
+        self.__fit_height_to_pages = value
+
+    def get_fit_height_to_pages(self):
+        return self.__fit_height_to_pages
+
+    fit_height_to_pages = property(get_fit_height_to_pages, set_fit_height_to_pages)
+
+    #################################################################
+
+    def set_print_in_rows(self, value):
+        self.__print_in_rows = int(value)
+
+    def get_print_in_rows(self):
+        return bool(self.__print_in_rows)
+
+    print_in_rows = property(get_print_in_rows, set_print_in_rows)
+
+    #################################################################
+
+    def set_portrait(self, value):
+        self.__portrait = int(value)
+
+    def get_portrait(self):
+        return bool(self.__portrait)
+
+    portrait = property(get_portrait, set_portrait)
+
+    #################################################################
+
+    def set_print_colour(self, value):
+        self.__print_not_colour = int(not value)
+
+    def get_print_colour(self):
+        return not bool(self.__print_not_colour)
+
+    print_colour = property(get_print_colour, set_print_colour)
+
+    #################################################################
+
+    def set_print_draft(self, value):
+        self.__print_draft = int(value)
+
+    def get_print_draft(self):
+        return bool(self.__print_draft)
+
+    print_draft = property(get_print_draft, set_print_draft)
+
+    #################################################################
+
+    def set_print_notes(self, value):
+        self.__print_notes = int(value)
+
+    def get_print_notes(self):
+        return bool(self.__print_notes)
+
+    print_notes = property(get_print_notes, set_print_notes)
+
+    #################################################################
+
+    def set_print_notes_at_end(self, value):
+        self.__print_notes_at_end = int(value)
+
+    def get_print_notes_at_end(self):
+        return bool(self.__print_notes_at_end)
+
+    print_notes_at_end = property(get_print_notes_at_end, set_print_notes_at_end)
+
+    #################################################################
+
+    def set_print_omit_errors(self, value):
+        self.__print_omit_errors = int(value)
+
+    def get_print_omit_errors(self):
+        return bool(self.__print_omit_errors)
+
+    print_omit_errors = property(get_print_omit_errors, set_print_omit_errors)
+
+    #################################################################
+
+    def set_print_hres(self, value):
+        self.__print_hres = value
+
+    def get_print_hres(self):
+        return self.__print_hres
+
+    print_hres = property(get_print_hres, set_print_hres)
+
+    #################################################################
+
+    def set_print_vres(self, value):
+        self.__print_vres = value
+
+    def get_print_vres(self):
+        return self.__print_vres
+
+    print_vres = property(get_print_vres, set_print_vres)
+
+    #################################################################
+
+    def set_header_margin(self, value):
+        self.__header_margin = value
+
+    def get_header_margin(self):
+        return self.__header_margin
+
+    header_margin = property(get_header_margin, set_header_margin)
+
+    #################################################################
+
+    def set_footer_margin(self, value):
+        self.__footer_margin = value
+
+    def get_footer_margin(self):
+        return self.__footer_margin
+
+    footer_margin = property(get_footer_margin, set_footer_margin)
+
+    #################################################################
+
+    def set_copies_num(self, value):
+        self.__copies_num = value
+
+    def get_copies_num(self):
+        return self.__copies_num
+
+    copies_num = property(get_copies_num, set_copies_num)
+
+    ##################################################################
+
+    def set_wnd_protect(self, value):
+        self.__wnd_protect = int(value)
+
+    def get_wnd_protect(self):
+        return bool(self.__wnd_protect)
+
+    wnd_protect = property(get_wnd_protect, set_wnd_protect)
+
+    #################################################################
+
+    def set_obj_protect(self, value):
+        self.__obj_protect = int(value)
+
+    def get_obj_protect(self):
+        return bool(self.__obj_protect)
+
+    obj_protect = property(get_obj_protect, set_obj_protect)
+
+    #################################################################
+
+    def set_protect(self, value):
+        self.__protect = int(value)
+
+    def get_protect(self):
+        return bool(self.__protect)
+
+    protect = property(get_protect, set_protect)
+
+    #################################################################
+
+    def set_scen_protect(self, value):
+        self.__scen_protect = int(value)
+
+    def get_scen_protect(self):
+        return bool(self.__scen_protect)
+
+    scen_protect = property(get_scen_protect, set_scen_protect)
+
+    #################################################################
+
+    def set_password(self, value):
+        self.__password = value
+
+    def get_password(self):
+        return self.__password
+
+    password = property(get_password, set_password)
+
+    ##################################################################
+    ## Methods
+    ##################################################################
+
+    def get_parent(self):
+        return self.__parent
+
+    def write(self, r, c, label="", style=Style.default_style):
+        self.row(r).write(c, label, style)
+
+    def merge(self, r1, r2, c1, c2, style=Style.default_style):
+        # Stand-alone merge of previously written cells.
+        # Problems: (1) style to be used should be existing style of
+        # the top-left cell, not an arg.
+        # (2) should ensure that any previous data value in
+        # non-top-left cells is nobbled.
+        # Note: if a cell is set by a data record then later
+        # is referenced by a [MUL]BLANK record, Excel will blank
+        # out the cell on the screen, but OOo & Gnu will not
+        # blank it out. Need to do something better than writing
+        # multiple records. In the meantime, avoid this method and use
+        # write_merge() instead.
+        if c2 > c1:
+            self.row(r1).write_blanks(c1 + 1, c2,  style)
+        for r in range(r1+1, r2+1):
+            self.row(r).write_blanks(c1, c2,  style)
+        self.__merged_ranges.append((r1, r2, c1, c2))
+
+    def write_merge(self, r1, r2, c1, c2, label="", style=Style.default_style):
+        assert 0 <= c1 <= c2 <= 255
+        assert 0 <= r1 <= r2 <= 65535
+        self.write(r1, c1, label, style)
+        if c2 > c1:
+            self.row(r1).write_blanks(c1 + 1, c2,  style) # skip (r1, c1)
+        for r in range(r1+1, r2+1):
+            self.row(r).write_blanks(c1, c2,  style)
+        self.__merged_ranges.append((r1, r2, c1, c2))
+
+    def insert_bitmap(self, filename, row, col, x = 0, y = 0, scale_x = 1, scale_y = 1):
+        bmp = Bitmap.ImDataBmpRecord(filename)
+        obj = Bitmap.ObjBmpRecord(row, col, self, bmp, x, y, scale_x, scale_y)
+
+        self.__bmp_rec += obj.get() + bmp.get()
+
+    def col(self, indx):
+        if indx not in self.__cols:
+            self.__cols[indx] = self.Column(indx, self)
+        return self.__cols[indx]
+
+    def row(self, indx):
+        if indx not in self.__rows:
+            if indx in self.__flushed_rows:
+                raise Exception("Attempt to reuse row index %d of sheet %r after flushing" % (indx, self.__name))
+            self.__rows[indx] = self.Row(indx, self)
+            if indx > self.last_used_row:
+                self.last_used_row = indx
+            if indx < self.first_used_row:
+                self.first_used_row = indx
+        return self.__rows[indx]
+
+    def row_height(self, row): # in pixels
+        if row in self.__rows:
+            return self.__rows[row].get_height_in_pixels()
+        else:
+            return 17
+
+    def col_width(self, col): # in pixels
+        if col in self.__cols:
+            return self.__cols[col].width_in_pixels()
+        else:
+            return 64
+
+
+    ##################################################################
+    ## BIFF records generation
+    ##################################################################
+
+    def __bof_rec(self):
+        return BIFFRecords.Biff8BOFRecord(BIFFRecords.Biff8BOFRecord.WORKSHEET).get()
+
+    def __update_row_visible_levels(self):
+        if self.__rows:
+            temp = max([self.__rows[r].level for r in self.__rows]) + 1
+            self.__row_visible_levels = max(temp, self.__row_visible_levels)
+
+    def __guts_rec(self):
+        self.__update_row_visible_levels()
+        col_visible_levels = 0
+        if len(self.__cols) != 0:
+            col_visible_levels = max([self.__cols[c].level for c in self.__cols]) + 1
+        return BIFFRecords.GutsRecord(
+            self.__row_gut_width, self.__col_gut_height, self.__row_visible_levels, col_visible_levels).get()
+
+    def __defaultrowheight_rec(self):
+        options = 0x0000
+        options |= (self.row_default_height_mismatch & 1) << 0
+        options |= (self.row_default_hidden & 1) << 1
+        options |= (self.row_default_space_above & 1) << 2
+        options |= (self.row_default_space_below & 1) << 3
+        defht = self.__row_default_height
+        return BIFFRecords.DefaultRowHeightRecord(options, defht).get()
+
+    def __wsbool_rec(self):
+        options = 0x00
+        options |= (self.__show_auto_page_breaks & 0x01) << 0
+        options |= (self.__dialogue_sheet & 0x01) << 4
+        options |= (self.__auto_style_outline & 0x01) << 5
+        options |= (self.__outline_below & 0x01) << 6
+        options |= (self.__outline_right & 0x01) << 7
+        options |= (self.__fit_num_pages & 0x01) << 8
+        options |= (self.__show_row_outline & 0x01) << 10
+        options |= (self.__show_col_outline & 0x01) << 11
+        options |= (self.__alt_expr_eval & 0x01) << 14
+        options |= (self.__alt_formula_entries & 0x01) << 15
+
+        return BIFFRecords.WSBoolRecord(options).get()
+
+    def __eof_rec(self):
+        return BIFFRecords.EOFRecord().get()
+
+    def __colinfo_rec(self):
+        result = ''
+        for col in self.__cols:
+            result += self.__cols[col].get_biff_record()
+        return result
+
+    def __dimensions_rec(self):
+        return BIFFRecords.DimensionsRecord(
+            self.first_used_row, self.last_used_row,
+            self.first_used_col, self.last_used_col
+            ).get()
+
+    def __window2_rec(self):
+        # Appends SCL record.
+        options = 0
+        options |= (self.__show_formulas        & 0x01) << 0
+        options |= (self.__show_grid            & 0x01) << 1
+        options |= (self.__show_headers         & 0x01) << 2
+        options |= (self.__panes_frozen         & 0x01) << 3
+        options |= (self.show_zero_values       & 0x01) << 4
+        options |= (self.__auto_colour_grid     & 0x01) << 5
+        options |= (self.__cols_right_to_left   & 0x01) << 6
+        options |= (self.__show_outline         & 0x01) << 7
+        options |= (self.__remove_splits        & 0x01) << 8
+        options |= (self.__selected             & 0x01) << 9
+        options |= (self.__sheet_visible        & 0x01) << 10
+        options |= (self.__page_preview         & 0x01) << 11
+        if self.__page_preview:
+            scl_magn = self.__preview_magn
+        else:
+            scl_magn = self.__normal_magn
+        return BIFFRecords.Window2Record(
+            options, self.__first_visible_row, self.__first_visible_col,
+            self.__grid_colour,
+            self.__preview_magn, self.__normal_magn, scl_magn).get()
+
+    def __panes_rec(self):
+        if self.__vert_split_pos is None and self.__horz_split_pos is None:
+            return ""
+
+        if self.__vert_split_pos is None:
+            self.__vert_split_pos = 0
+        if self.__horz_split_pos is None:
+            self.__horz_split_pos = 0
+
+        if self.__panes_frozen:
+            if self.__vert_split_first_visible is None:
+                self.__vert_split_first_visible = self.__vert_split_pos
+            if self.__horz_split_first_visible is None:
+                self.__horz_split_first_visible = self.__horz_split_pos
+        else:
+            if self.__vert_split_first_visible is None:
+                self.__vert_split_first_visible = 0
+            if self.__horz_split_first_visible is None:
+                self.__horz_split_first_visible = 0
+            # inspired by pyXLWriter
+            self.__horz_split_pos = 20*self.__horz_split_pos + 255
+            self.__vert_split_pos = 113.879*self.__vert_split_pos + 390
+
+        if self.__vert_split_pos > 0 and self.__horz_split_pos > 0:
+            self.__split_active_pane = 0
+        elif self.__vert_split_pos > 0 and self.__horz_split_pos == 0:
+            self.__split_active_pane = 1
+        elif self.__vert_split_pos == 0 and self.__horz_split_pos > 0:
+            self.__split_active_pane = 2
+        else:
+            self.__split_active_pane = 3
+
+        result = BIFFRecords.PanesRecord(self.__vert_split_pos,
+                                         self.__horz_split_pos,
+                                         self.__horz_split_first_visible,
+                                         self.__vert_split_first_visible,
+                                         self.__split_active_pane).get()
+        return result
+
+    def __row_blocks_rec(self):
+        result = []
+        for row in self.__rows.itervalues():
+            result.append(row.get_row_biff_data())
+            result.append(row.get_cells_biff_data())
+        return ''.join(result)
+
+    def __merged_rec(self):
+        return BIFFRecords.MergedCellsRecord(self.__merged_ranges).get()
+
+    def __bitmaps_rec(self):
+        return self.__bmp_rec
+
+    def __calc_settings_rec(self):
+        result = ''
+        result += BIFFRecords.CalcModeRecord(self.__calc_mode & 0x01).get()
+        result += BIFFRecords.CalcCountRecord(self.__calc_count & 0xFFFF).get()
+        result += BIFFRecords.RefModeRecord(self.__RC_ref_mode & 0x01).get()
+        result += BIFFRecords.IterationRecord(self.__iterations_on & 0x01).get()
+        result += BIFFRecords.DeltaRecord(self.__delta).get()
+        result += BIFFRecords.SaveRecalcRecord(self.__save_recalc & 0x01).get()
+        return result
+
+    def __print_settings_rec(self):
+        result = ''
+        result += BIFFRecords.PrintHeadersRecord(self.__print_headers).get()
+        result += BIFFRecords.PrintGridLinesRecord(self.__print_grid).get()
+        result += BIFFRecords.GridSetRecord(self.__grid_set).get()
+        result += BIFFRecords.HorizontalPageBreaksRecord(self.__horz_page_breaks).get()
+        result += BIFFRecords.VerticalPageBreaksRecord(self.__vert_page_breaks).get()
+        result += BIFFRecords.HeaderRecord(self.__header_str).get()
+        result += BIFFRecords.FooterRecord(self.__footer_str).get()
+        result += BIFFRecords.HCenterRecord(self.__print_centered_horz).get()
+        result += BIFFRecords.VCenterRecord(self.__print_centered_vert).get()
+        result += BIFFRecords.LeftMarginRecord(self.__left_margin).get()
+        result += BIFFRecords.RightMarginRecord(self.__right_margin).get()
+        result += BIFFRecords.TopMarginRecord(self.__top_margin).get()
+        result += BIFFRecords.BottomMarginRecord(self.__bottom_margin).get()
+
+        setup_page_options =  (self.__print_in_rows & 0x01) << 0
+        setup_page_options |=  (self.__portrait & 0x01) << 1
+        setup_page_options |=  (0x00 & 0x01) << 2
+        setup_page_options |=  (self.__print_not_colour & 0x01) << 3
+        setup_page_options |=  (self.__print_draft & 0x01) << 4
+        setup_page_options |=  (self.__print_notes & 0x01) << 5
+        setup_page_options |=  (0x00 & 0x01) << 6
+        setup_page_options |=  (0x01 & 0x01) << 7
+        setup_page_options |=  (self.__print_notes_at_end & 0x01) << 9
+        setup_page_options |=  (self.__print_omit_errors & 0x03) << 10
+
+        result += BIFFRecords.SetupPageRecord(self.__paper_size_code,
+                                self.__print_scaling,
+                                self.__start_page_number,
+                                self.__fit_width_to_pages,
+                                self.__fit_height_to_pages,
+                                setup_page_options,
+                                self.__print_hres,
+                                self.__print_vres,
+                                self.__header_margin,
+                                self.__footer_margin,
+                                self.__copies_num).get()
+        return result
+
+    def __protection_rec(self):
+        result = ''
+        result += BIFFRecords.ProtectRecord(self.__protect).get()
+        result += BIFFRecords.ScenProtectRecord(self.__scen_protect).get()
+        result += BIFFRecords.WindowProtectRecord(self.__wnd_protect).get()
+        result += BIFFRecords.ObjectProtectRecord(self.__obj_protect).get()
+        result += BIFFRecords.PasswordRecord(self.__password).get()
+        return result
+
+    def get_biff_data(self):
+        result = [
+            self.__bof_rec(),
+            self.__calc_settings_rec(),
+            self.__guts_rec(),
+            self.__defaultrowheight_rec(),
+            self.__wsbool_rec(),
+            self.__colinfo_rec(),
+            self.__dimensions_rec(),
+            self.__print_settings_rec(),
+            self.__protection_rec(),
+            ]
+        if self.row_tempfile:
+            self.row_tempfile.flush()
+            self.row_tempfile.seek(0)
+            result.append(self.row_tempfile.read())
+        result.extend([
+            self.__row_blocks_rec(),
+            self.__merged_rec(),
+            self.__bitmaps_rec(),
+            self.__window2_rec(),
+            self.__panes_rec(),
+            self.__eof_rec(),
+            ])
+        return ''.join(result)
+
+    def flush_row_data(self):
+        if self.row_tempfile is None:
+            self.row_tempfile = tempfile.TemporaryFile()
+        self.row_tempfile.write(self.__row_blocks_rec())
+        for rowx in self.__rows:
+            self.__flushed_rows[rowx] = 1
+        self.__update_row_visible_levels()
+        self.__rows = {}
+
+
diff --git a/tablib/packages/xlwt/__init__.py b/tablib/packages/xlwt/__init__.py
new file mode 100644
index 0000000..dcc23f0
--- /dev/null
+++ b/tablib/packages/xlwt/__init__.py
@@ -0,0 +1,16 @@
+# -*- coding: windows-1252 -*-
+
+__VERSION__ = '0.7.2'
+
+import sys
+if sys.version_info[:2] < (2, 3):
+    print >> sys.stderr, "Sorry, xlwt requires Python 2.3 or later"
+    sys.exit(1)
+
+from Workbook import Workbook
+from Worksheet import Worksheet
+from Row import Row
+from Column import Column
+from Formatting import Font, Alignment, Borders, Pattern, Protection
+from Style import XFStyle, easyxf
+from ExcelFormula import *
diff --git a/tablib/packages/xlwt/antlr.py b/tablib/packages/xlwt/antlr.py
new file mode 100644
index 0000000..aaad447
--- /dev/null
+++ b/tablib/packages/xlwt/antlr.py
@@ -0,0 +1,2874 @@
+## This file is part of PyANTLR. See LICENSE.txt for license
+## details..........Copyright (C) Wolfgang Haefelinger, 2004.
+
+## This file was copied for use with xlwt from the 2.7.7 ANTLR distribution. Yes, it
+## says 2.7.5 below. The 2.7.5 distribution version didn't have a
+## version in it.
+
+## Here is the contents of the ANTLR 2.7.7 LICENSE.txt referred to above.
+
+# SOFTWARE RIGHTS
+#
+# ANTLR 1989-2006 Developed by Terence Parr
+# Partially supported by University of San Francisco & jGuru.com
+#
+# We reserve no legal rights to the ANTLR--it is fully in the
+# public domain. An individual or company may do whatever
+# they wish with source code distributed with ANTLR or the
+# code generated by ANTLR, including the incorporation of
+# ANTLR, or its output, into commerical software.
+#
+# We encourage users to develop software with ANTLR. However,
+# we do ask that credit is given to us for developing
+# ANTLR. By "credit", we mean that if you use ANTLR or
+# incorporate any source code into one of your programs
+# (commercial product, research project, or otherwise) that
+# you acknowledge this fact somewhere in the documentation,
+# research report, etc... If you like ANTLR and have
+# developed a nice tool with the output, please mention that
+# you developed it using ANTLR. In addition, we ask that the
+# headers remain intact in our source code. As long as these
+# guidelines are kept, we expect to continue enhancing this
+# system and expect to make other tools available as they are
+# completed.
+#
+# The primary ANTLR guy:
+#
+# Terence Parr
+# parrt@cs.usfca.edu
+# parrt@antlr.org
+
+## End of contents of the ANTLR 2.7.7 LICENSE.txt ########################
+
+## get sys module
+import sys
+
+version = sys.version.split()[0]
+if version < '2.2.1':
+    False = 0
+if version < '2.3':
+    True = not False
+
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+###                     global symbols                             ###
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+
+### ANTLR Standard Tokens
+SKIP                = -1
+INVALID_TYPE        = 0
+EOF_TYPE            = 1
+EOF                 = 1
+NULL_TREE_LOOKAHEAD = 3
+MIN_USER_TYPE       = 4
+
+### ANTLR's EOF Symbol
+EOF_CHAR            = ''
+
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+###                    general functions                           ###
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+
+## Version should be automatically derived from configure.in. For now,
+## we need to bump it ourselfs. Don't remove the <version> tags.
+## <version>
+def version():
+    r = {
+        'major'  : '2',
+        'minor'  : '7',
+        'micro'  : '5',
+        'patch'  : '' ,
+        'version': '2.7.5'
+        }
+    return r
+## </version>
+
+def error(fmt,*args):
+    if fmt:
+        print "error: ", fmt % tuple(args)
+
+def ifelse(cond,_then,_else):
+    if cond :
+        r = _then
+    else:
+        r = _else
+    return r
+
+def is_string_type(x):
+    # return  (isinstance(x,str) or isinstance(x,unicode))
+    # Simplify; xlwt doesn't support Python < 2.3
+    return isinstance(basestring)
+
+def assert_string_type(x):
+    assert is_string_type(x)
+    pass
+
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+###                     ANTLR Exceptions                           ###
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+
+class ANTLRException(Exception):
+
+    def __init__(self, *args):
+        Exception.__init__(self, *args)
+
+
+class RecognitionException(ANTLRException):
+
+    def __init__(self, *args):
+        ANTLRException.__init__(self, *args)
+        self.fileName = None
+        self.line = -1
+        self.column = -1
+        if len(args) >= 2:
+            self.fileName = args[1]
+        if len(args) >= 3:
+            self.line = args[2]
+        if len(args) >= 4:
+            self.column = args[3]
+
+    def __str__(self):
+        buf = ['']
+        if self.fileName:
+            buf.append(self.fileName + ":")
+        if self.line != -1:
+            if not self.fileName:
+                buf.append("line ")
+            buf.append(str(self.line))
+            if self.column != -1:
+                buf.append(":" + str(self.column))
+            buf.append(":")
+        buf.append(" ")
+        return str('').join(buf)
+
+    __repr__ = __str__
+
+
+class NoViableAltException(RecognitionException):
+
+    def __init__(self, *args):
+        RecognitionException.__init__(self, *args)
+        self.token = None
+        self.node  = None
+        if isinstance(args[0],AST):
+            self.node = args[0]
+        elif isinstance(args[0],Token):
+            self.token = args[0]
+        else:
+            raise TypeError("NoViableAltException requires Token or AST argument")
+
+    def __str__(self):
+        if self.token:
+            line = self.token.getLine()
+            col  = self.token.getColumn()
+            text = self.token.getText()
+            return "unexpected symbol at line %s (column %s): \"%s\"" % (line,col,text)
+        if self.node == ASTNULL:
+            return "unexpected end of subtree"
+        assert self.node
+        ### hackish, we assume that an AST contains method getText
+        return "unexpected node: %s" % (self.node.getText())
+
+    __repr__ = __str__
+
+
+class NoViableAltForCharException(RecognitionException):
+
+    def __init__(self, *args):
+        self.foundChar = None
+        if len(args) == 2:
+            self.foundChar = args[0]
+            scanner = args[1]
+            RecognitionException.__init__(self, "NoViableAlt",
+                                          scanner.getFilename(),
+                                          scanner.getLine(),
+                                          scanner.getColumn())
+        elif len(args) == 4:
+            self.foundChar = args[0]
+            fileName = args[1]
+            line = args[2]
+            column = args[3]
+            RecognitionException.__init__(self, "NoViableAlt",
+                                          fileName, line, column)
+        else:
+            RecognitionException.__init__(self, "NoViableAlt",
+                                          '', -1, -1)
+
+    def __str__(self):
+        mesg = "unexpected char: "
+        if self.foundChar >= ' ' and self.foundChar <= '~':
+            mesg += "'" + self.foundChar + "'"
+        elif self.foundChar:
+            mesg += "0x" + hex(ord(self.foundChar)).upper()[2:]
+        else:
+            mesg += "<None>"
+        return mesg
+
+    __repr__ = __str__
+
+
+class SemanticException(RecognitionException):
+
+    def __init__(self, *args):
+        RecognitionException.__init__(self, *args)
+
+
+class MismatchedCharException(RecognitionException):
+
+    NONE = 0
+    CHAR = 1
+    NOT_CHAR = 2
+    RANGE = 3
+    NOT_RANGE = 4
+    SET = 5
+    NOT_SET = 6
+
+    def __init__(self, *args):
+        self.args = args
+        if len(args) == 5:
+            # Expected range / not range
+            if args[3]:
+                self.mismatchType = MismatchedCharException.NOT_RANGE
+            else:
+                self.mismatchType = MismatchedCharException.RANGE
+            self.foundChar = args[0]
+            self.expecting = args[1]
+            self.upper = args[2]
+            self.scanner = args[4]
+            RecognitionException.__init__(self, "Mismatched char range",
+                                          self.scanner.getFilename(),
+                                          self.scanner.getLine(),
+                                          self.scanner.getColumn())
+        elif len(args) == 4 and is_string_type(args[1]):
+            # Expected char / not char
+            if args[2]:
+                self.mismatchType = MismatchedCharException.NOT_CHAR
+            else:
+                self.mismatchType = MismatchedCharException.CHAR
+            self.foundChar = args[0]
+            self.expecting = args[1]
+            self.scanner = args[3]
+            RecognitionException.__init__(self, "Mismatched char",
+                                          self.scanner.getFilename(),
+                                          self.scanner.getLine(),
+                                          self.scanner.getColumn())
+        elif len(args) == 4 and isinstance(args[1], BitSet):
+            # Expected BitSet / not BitSet
+            if args[2]:
+                self.mismatchType = MismatchedCharException.NOT_SET
+            else:
+                self.mismatchType = MismatchedCharException.SET
+            self.foundChar = args[0]
+            self.set = args[1]
+            self.scanner = args[3]
+            RecognitionException.__init__(self, "Mismatched char set",
+                                          self.scanner.getFilename(),
+                                          self.scanner.getLine(),
+                                          self.scanner.getColumn())
+        else:
+            self.mismatchType = MismatchedCharException.NONE
+            RecognitionException.__init__(self, "Mismatched char")
+
+    ## Append a char to the msg buffer.  If special,
+    #  then show escaped version
+    #
+    def appendCharName(self, sb, c):
+        if not c or c == 65535:
+            # 65535 = (char) -1 = EOF
+            sb.append("'<EOF>'")
+        elif c == '\n':
+            sb.append("'\\n'")
+        elif c == '\r':
+            sb.append("'\\r'");
+        elif c == '\t':
+            sb.append("'\\t'")
+        else:
+            sb.append('\'' + c + '\'')
+
+    ##
+    # Returns an error message with line number/column information
+    #
+    def __str__(self):
+        sb = ['']
+        sb.append(RecognitionException.__str__(self))
+
+        if self.mismatchType == MismatchedCharException.CHAR:
+            sb.append("expecting ")
+            self.appendCharName(sb, self.expecting)
+            sb.append(", found ")
+            self.appendCharName(sb, self.foundChar)
+        elif self.mismatchType == MismatchedCharException.NOT_CHAR:
+            sb.append("expecting anything but '")
+            self.appendCharName(sb, self.expecting)
+            sb.append("'; got it anyway")
+        elif self.mismatchType in [MismatchedCharException.RANGE, MismatchedCharException.NOT_RANGE]:
+            sb.append("expecting char ")
+            if self.mismatchType == MismatchedCharException.NOT_RANGE:
+                sb.append("NOT ")
+            sb.append("in range: ")
+            appendCharName(sb, self.expecting)
+            sb.append("..")
+            appendCharName(sb, self.upper)
+            sb.append(", found ")
+            appendCharName(sb, self.foundChar)
+        elif self.mismatchType in [MismatchedCharException.SET, MismatchedCharException.NOT_SET]:
+            sb.append("expecting ")
+            if self.mismatchType == MismatchedCharException.NOT_SET:
+                sb.append("NOT ")
+            sb.append("one of (")
+            for i in range(len(self.set)):
+                self.appendCharName(sb, self.set[i])
+            sb.append("), found ")
+            self.appendCharName(sb, self.foundChar)
+
+        return str().join(sb).strip()
+
+    __repr__ = __str__
+
+
+class MismatchedTokenException(RecognitionException):
+
+    NONE = 0
+    TOKEN = 1
+    NOT_TOKEN = 2
+    RANGE = 3
+    NOT_RANGE = 4
+    SET = 5
+    NOT_SET = 6
+
+    def __init__(self, *args):
+        self.args =  args
+        self.tokenNames = []
+        self.token = None
+        self.tokenText = ''
+        self.node =  None
+        if len(args) == 6:
+            # Expected range / not range
+            if args[3]:
+                self.mismatchType = MismatchedTokenException.NOT_RANGE
+            else:
+                self.mismatchType = MismatchedTokenException.RANGE
+            self.tokenNames = args[0]
+            self.expecting = args[2]
+            self.upper = args[3]
+            self.fileName = args[5]
+
+        elif len(args) == 4 and isinstance(args[2], int):
+            # Expected token / not token
+            if args[3]:
+                self.mismatchType = MismatchedTokenException.NOT_TOKEN
+            else:
+                self.mismatchType = MismatchedTokenException.TOKEN
+            self.tokenNames = args[0]
+            self.expecting = args[2]
+
+        elif len(args) == 4 and isinstance(args[2], BitSet):
+            # Expected BitSet / not BitSet
+            if args[3]:
+                self.mismatchType = MismatchedTokenException.NOT_SET
+            else:
+                self.mismatchType = MismatchedTokenException.SET
+            self.tokenNames = args[0]
+            self.set = args[2]
+
+        else:
+            self.mismatchType = MismatchedTokenException.NONE
+            RecognitionException.__init__(self, "Mismatched Token: expecting any AST node", "<AST>", -1, -1)
+
+        if len(args) >= 2:
+            if isinstance(args[1],Token):
+                self.token = args[1]
+                self.tokenText = self.token.getText()
+                RecognitionException.__init__(self, "Mismatched Token",
+                                              self.fileName,
+                                              self.token.getLine(),
+                                              self.token.getColumn())
+            elif isinstance(args[1],AST):
+                self.node = args[1]
+                self.tokenText = str(self.node)
+                RecognitionException.__init__(self, "Mismatched Token",
+                                              "<AST>",
+                                              self.node.getLine(),
+                                              self.node.getColumn())
+            else:
+                self.tokenText = "<empty tree>"
+                RecognitionException.__init__(self, "Mismatched Token",
+                                              "<AST>", -1, -1)
+
+    def appendTokenName(self, sb, tokenType):
+        if tokenType == INVALID_TYPE:
+            sb.append("<Set of tokens>")
+        elif tokenType < 0 or tokenType >= len(self.tokenNames):
+            sb.append("<" + str(tokenType) + ">")
+        else:
+            sb.append(self.tokenNames[tokenType])
+
+    ##
+    # Returns an error message with line number/column information
+    #
+    def __str__(self):
+        sb = ['']
+        sb.append(RecognitionException.__str__(self))
+
+        if self.mismatchType == MismatchedTokenException.TOKEN:
+            sb.append("expecting ")
+            self.appendTokenName(sb, self.expecting)
+            sb.append(", found " + self.tokenText)
+        elif self.mismatchType == MismatchedTokenException.NOT_TOKEN:
+            sb.append("expecting anything but '")
+            self.appendTokenName(sb, self.expecting)
+            sb.append("'; got it anyway")
+        elif self.mismatchType in [MismatchedTokenException.RANGE, MismatchedTokenException.NOT_RANGE]:
+            sb.append("expecting token ")
+            if self.mismatchType == MismatchedTokenException.NOT_RANGE:
+                sb.append("NOT ")
+            sb.append("in range: ")
+            appendTokenName(sb, self.expecting)
+            sb.append("..")
+            appendTokenName(sb, self.upper)
+            sb.append(", found " + self.tokenText)
+        elif self.mismatchType in [MismatchedTokenException.SET, MismatchedTokenException.NOT_SET]:
+            sb.append("expecting ")
+            if self.mismatchType == MismatchedTokenException.NOT_SET:
+                sb.append("NOT ")
+            sb.append("one of (")
+            for i in range(len(self.set)):
+                self.appendTokenName(sb, self.set[i])
+            sb.append("), found " + self.tokenText)
+
+        return str().join(sb).strip()
+
+    __repr__ = __str__
+
+
+class TokenStreamException(ANTLRException):
+
+    def __init__(self, *args):
+        ANTLRException.__init__(self, *args)
+
+
+# Wraps an Exception in a TokenStreamException
+class TokenStreamIOException(TokenStreamException):
+
+    def __init__(self, *args):
+        if args and isinstance(args[0], Exception):
+            io = args[0]
+            TokenStreamException.__init__(self, str(io))
+            self.io = io
+        else:
+            TokenStreamException.__init__(self, *args)
+            self.io = self
+
+
+# Wraps a RecognitionException in a TokenStreamException
+class TokenStreamRecognitionException(TokenStreamException):
+
+    def __init__(self, *args):
+        if args and isinstance(args[0], RecognitionException):
+            recog = args[0]
+            TokenStreamException.__init__(self, str(recog))
+            self.recog = recog
+        else:
+            raise TypeError("TokenStreamRecognitionException requires RecognitionException argument")
+
+    def __str__(self):
+        return str(self.recog)
+
+    __repr__ = __str__
+
+
+class TokenStreamRetryException(TokenStreamException):
+
+    def __init__(self, *args):
+        TokenStreamException.__init__(self, *args)
+
+
+class CharStreamException(ANTLRException):
+
+    def __init__(self, *args):
+        ANTLRException.__init__(self, *args)
+
+
+# Wraps an Exception in a CharStreamException
+class CharStreamIOException(CharStreamException):
+
+    def __init__(self, *args):
+        if args and isinstance(args[0], Exception):
+            io = args[0]
+            CharStreamException.__init__(self, str(io))
+            self.io = io
+        else:
+            CharStreamException.__init__(self, *args)
+            self.io = self
+
+
+class TryAgain(Exception):
+    pass
+
+
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+###                       Token                                    ###
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+
+class Token(object):
+    SKIP                = -1
+    INVALID_TYPE        = 0
+    EOF_TYPE            = 1
+    EOF                 = 1
+    NULL_TREE_LOOKAHEAD = 3
+    MIN_USER_TYPE       = 4
+
+    def __init__(self,**argv):
+        try:
+            self.type = argv['type']
+        except:
+            self.type = INVALID_TYPE
+        try:
+            self.text = argv['text']
+        except:
+            self.text = "<no text>"
+
+    def isEOF(self):
+        return (self.type == EOF_TYPE)
+
+    def getColumn(self):
+        return 0
+
+    def getLine(self):
+        return 0
+
+    def getFilename(self):
+        return None
+
+    def setFilename(self,name):
+        return self
+
+    def getText(self):
+        return "<no text>"
+
+    def setText(self,text):
+        if is_string_type(text):
+            pass
+        else:
+            raise TypeError("Token.setText requires string argument")
+        return self
+
+    def setColumn(self,column):
+        return self
+
+    def setLine(self,line):
+        return self
+
+    def getType(self):
+        return self.type
+
+    def setType(self,type):
+        if isinstance(type,int):
+            self.type = type
+        else:
+            raise TypeError("Token.setType requires integer argument")
+        return self
+
+    def toString(self):
+        ## not optimal
+        type_ = self.type
+        if type_ == 3:
+            tval = 'NULL_TREE_LOOKAHEAD'
+        elif type_ == 1:
+            tval = 'EOF_TYPE'
+        elif type_ == 0:
+            tval = 'INVALID_TYPE'
+        elif type_ == -1:
+            tval = 'SKIP'
+        else:
+            tval = type_
+        return '["%s",<%s>]' % (self.getText(),tval)
+
+    __str__ = toString
+    __repr__ = toString
+
+### static attribute ..
+Token.badToken = Token( type=INVALID_TYPE, text="<no text>")
+
+if __name__ == "__main__":
+    print "testing .."
+    T = Token.badToken
+    print T
+
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+###                       CommonToken                              ###
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+
+class CommonToken(Token):
+
+    def __init__(self,**argv):
+        Token.__init__(self,**argv)
+        self.line = 0
+        self.col  = 0
+        try:
+            self.line = argv['line']
+        except:
+            pass
+        try:
+            self.col = argv['col']
+        except:
+            pass
+
+    def getLine(self):
+        return self.line
+
+    def getText(self):
+        return self.text
+
+    def getColumn(self):
+        return self.col
+
+    def setLine(self,line):
+        self.line = line
+        return self
+
+    def setText(self,text):
+        self.text = text
+        return self
+
+    def setColumn(self,col):
+        self.col = col
+        return self
+
+    def toString(self):
+        ## not optimal
+        type_ = self.type
+        if type_ == 3:
+            tval = 'NULL_TREE_LOOKAHEAD'
+        elif type_ == 1:
+            tval = 'EOF_TYPE'
+        elif type_ == 0:
+            tval = 'INVALID_TYPE'
+        elif type_ == -1:
+            tval = 'SKIP'
+        else:
+            tval = type_
+        d = {
+           'text' : self.text,
+           'type' : tval,
+           'line' : self.line,
+           'colm' : self.col
+           }
+
+        fmt = '["%(text)s",<%(type)s>,line=%(line)s,col=%(colm)s]'
+        return fmt % d
+
+    __str__ = toString
+    __repr__ = toString
+
+
+if __name__ == '__main__' :
+    T = CommonToken()
+    print T
+    T = CommonToken(col=15,line=1,text="some text", type=5)
+    print T
+    T = CommonToken()
+    T.setLine(1).setColumn(15).setText("some text").setType(5)
+    print T
+    print T.getLine()
+    print T.getColumn()
+    print T.getText()
+    print T.getType()
+
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+###                    CommonHiddenStreamToken                     ###
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+
+class CommonHiddenStreamToken(CommonToken):
+    def __init__(self,*args):
+        CommonToken.__init__(self,*args)
+        self.hiddenBefore = None
+        self.hiddenAfter  = None
+
+    def getHiddenAfter(self):
+        return self.hiddenAfter
+
+    def getHiddenBefore(self):
+        return self.hiddenBefore
+
+    def setHiddenAfter(self,t):
+        self.hiddenAfter = t
+
+    def setHiddenBefore(self, t):
+        self.hiddenBefore = t
+
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+###                       Queue                                    ###
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+
+## Shall be a circular buffer on tokens ..
+class Queue(object):
+
+    def __init__(self):
+        self.buffer = [] # empty list
+
+    def append(self,item):
+        self.buffer.append(item)
+
+    def elementAt(self,index):
+        return self.buffer[index]
+
+    def reset(self):
+        self.buffer = []
+
+    def removeFirst(self):
+        self.buffer.pop(0)
+
+    def length(self):
+        return len(self.buffer)
+
+    def __str__(self):
+        return str(self.buffer)
+
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+###                       InputBuffer                              ###
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+
+class InputBuffer(object):
+    def __init__(self):
+        self.nMarkers = 0
+        self.markerOffset = 0
+        self.numToConsume = 0
+        self.queue = Queue()
+
+    def __str__(self):
+        return "(%s,%s,%s,%s)" % (
+           self.nMarkers,
+           self.markerOffset,
+           self.numToConsume,
+           self.queue)
+
+    def __repr__(self):
+        return str(self)
+
+    def commit(self):
+        self.nMarkers -= 1
+
+    def consume(self) :
+        self.numToConsume += 1
+
+    ## probably better to return a list of items
+    ## because of unicode. Or return a unicode
+    ## string ..
+    def getLAChars(self) :
+        i = self.markerOffset
+        n = self.queue.length()
+        s = ''
+        while i<n:
+            s += self.queue.elementAt(i)
+        return s
+
+    ## probably better to return a list of items
+    ## because of unicode chars
+    def getMarkedChars(self) :
+        s = ''
+        i = 0
+        n = self.markerOffset
+        while i<n:
+            s += self.queue.elementAt(i)
+        return s
+
+    def isMarked(self) :
+        return self.nMarkers != 0
+
+    def fill(self,k):
+        ### abstract method
+        raise NotImplementedError()
+
+    def LA(self,k) :
+        self.fill(k)
+        return self.queue.elementAt(self.markerOffset + k - 1)
+
+    def mark(self) :
+        self.syncConsume()
+        self.nMarkers += 1
+        return self.markerOffset
+
+    def rewind(self,mark) :
+        self.syncConsume()
+        self.markerOffset = mark
+        self.nMarkers -= 1
+
+    def reset(self) :
+        self.nMarkers = 0
+        self.markerOffset = 0
+        self.numToConsume = 0
+        self.queue.reset()
+
+    def syncConsume(self) :
+        while self.numToConsume > 0:
+            if self.nMarkers > 0:
+                # guess mode -- leave leading characters and bump offset.
+                self.markerOffset += 1
+            else:
+                # normal mode -- remove first character
+                self.queue.removeFirst()
+            self.numToConsume -= 1
+
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+###                       CharBuffer                               ###
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+
+class CharBuffer(InputBuffer):
+    def __init__(self,reader):
+        ##assert isinstance(reader,file)
+        super(CharBuffer,self).__init__()
+        ## a reader is supposed to be anything that has
+        ## a method 'read(int)'.
+        self.input = reader
+
+    def __str__(self):
+        base = super(CharBuffer,self).__str__()
+        return "CharBuffer{%s,%s" % (base,str(input))
+
+    def fill(self,amount):
+        try:
+            self.syncConsume()
+            while self.queue.length() < (amount + self.markerOffset) :
+                ## retrieve just one char - what happend at end
+                ## of input?
+                c = self.input.read(1)
+                ### python's behaviour is to return the empty string  on
+                ### EOF, ie. no exception whatsoever is thrown. An empty
+                ### python  string  has  the  nice feature that it is of
+                ### type 'str' and  "not ''" would return true. Contrary,
+                ### one can't  do  this: '' in 'abc'. This should return
+                ### false,  but all we  get  is  then  a TypeError as an
+                ### empty string is not a character.
+
+                ### Let's assure then that we have either seen a
+                ### character or an empty string (EOF).
+                assert len(c) == 0 or len(c) == 1
+
+                ### And it shall be of type string (ASCII or UNICODE).
+                assert is_string_type(c)
+
+                ### Just append EOF char to buffer. Note that buffer may
+                ### contain then just more than one EOF char ..
+
+                ### use unicode chars instead of ASCII ..
+                self.queue.append(c)
+        except Exception,e:
+            raise CharStreamIOException(e)
+        ##except: # (mk) Cannot happen ...
+            ##error ("unexpected exception caught ..")
+            ##assert 0
+
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+###                       LexerSharedInputState                    ###
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+
+class LexerSharedInputState(object):
+    def __init__(self,ibuf):
+        assert isinstance(ibuf,InputBuffer)
+        self.input = ibuf
+        self.column = 1
+        self.line = 1
+        self.tokenStartColumn = 1
+        self.tokenStartLine = 1
+        self.guessing = 0
+        self.filename = None
+
+    def reset(self):
+        self.column = 1
+        self.line = 1
+        self.tokenStartColumn = 1
+        self.tokenStartLine = 1
+        self.guessing = 0
+        self.filename = None
+        self.input.reset()
+
+    def LA(self,k):
+        return self.input.LA(k)
+
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+###                    TokenStream                                 ###
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+
+class TokenStream(object):
+    def nextToken(self):
+        pass
+
+    def __iter__(self):
+        return TokenStreamIterator(self)
+
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+###                    TokenStreamIterator                                 ###
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+
+class TokenStreamIterator(object):
+    def __init__(self,inst):
+        if isinstance(inst,TokenStream):
+            self.inst = inst
+            return
+        raise TypeError("TokenStreamIterator requires TokenStream object")
+
+    def next(self):
+        assert self.inst
+        item = self.inst.nextToken()
+        if not item or item.isEOF():
+            raise StopIteration()
+        return item
+
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+###                    TokenStreamSelector                        ###
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+
+class TokenStreamSelector(TokenStream):
+
+    def __init__(self):
+        self._input = None
+        self._stmap = {}
+        self._stack = []
+
+    def addInputStream(self,stream,key):
+        self._stmap[key] = stream
+
+    def getCurrentStream(self):
+        return self._input
+
+    def getStream(self,sname):
+        try:
+            stream = self._stmap[sname]
+        except:
+            raise ValueError("TokenStream " + sname + " not found");
+        return stream;
+
+    def nextToken(self):
+        while 1:
+            try:
+                return self._input.nextToken()
+            except TokenStreamRetryException,r:
+                ### just retry "forever"
+                pass
+
+    def pop(self):
+        stream = self._stack.pop();
+        self.select(stream);
+        return stream;
+
+    def push(self,arg):
+        self._stack.append(self._input);
+        self.select(arg)
+
+    def retry(self):
+        raise TokenStreamRetryException()
+
+    def select(self,arg):
+        if isinstance(arg,TokenStream):
+            self._input = arg
+            return
+        if is_string_type(arg):
+            self._input = self.getStream(arg)
+            return
+        raise TypeError("TokenStreamSelector.select requires " +
+                        "TokenStream or string argument")
+
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+###                      TokenStreamBasicFilter                    ###
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+
+class TokenStreamBasicFilter(TokenStream):
+
+    def __init__(self,input):
+
+        self.input = input;
+        self.discardMask = BitSet()
+
+    def discard(self,arg):
+        if isinstance(arg,int):
+            self.discardMask.add(arg)
+            return
+        if isinstance(arg,BitSet):
+            self.discardMark = arg
+            return
+        raise TypeError("TokenStreamBasicFilter.discard requires" +
+                        "integer or BitSet argument")
+
+    def nextToken(self):
+        tok = self.input.nextToken()
+        while tok and self.discardMask.member(tok.getType()):
+            tok = self.input.nextToken()
+        return tok
+
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+###                      TokenStreamHiddenTokenFilter              ###
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+
+class TokenStreamHiddenTokenFilter(TokenStreamBasicFilter):
+
+    def __init__(self,input):
+        TokenStreamBasicFilter.__init__(self,input)
+        self.hideMask = BitSet()
+        self.nextMonitoredToken = None
+        self.lastHiddenToken = None
+        self.firstHidden = None
+
+    def consume(self):
+        self.nextMonitoredToken = self.input.nextToken()
+
+    def consumeFirst(self):
+        self.consume()
+
+        p = None;
+        while self.hideMask.member(self.LA(1).getType()) or \
+              self.discardMask.member(self.LA(1).getType()):
+            if self.hideMask.member(self.LA(1).getType()):
+                if not p:
+                    p = self.LA(1)
+                else:
+                    p.setHiddenAfter(self.LA(1))
+                    self.LA(1).setHiddenBefore(p)
+                    p = self.LA(1)
+                self.lastHiddenToken = p
+                if not self.firstHidden:
+                    self.firstHidden = p
+            self.consume()
+
+    def getDiscardMask(self):
+        return self.discardMask
+
+    def getHiddenAfter(self,t):
+        return t.getHiddenAfter()
+
+    def getHiddenBefore(self,t):
+        return t.getHiddenBefore()
+
+    def getHideMask(self):
+        return self.hideMask
+
+    def getInitialHiddenToken(self):
+        return self.firstHidden
+
+    def hide(self,m):
+        if isinstance(m,int):
+            self.hideMask.add(m)
+            return
+        if isinstance(m.BitMask):
+            self.hideMask = m
+            return
+
+    def LA(self,i):
+        return self.nextMonitoredToken
+
+    def nextToken(self):
+        if not self.LA(1):
+            self.consumeFirst()
+
+        monitored = self.LA(1)
+
+        monitored.setHiddenBefore(self.lastHiddenToken)
+        self.lastHiddenToken = None
+
+        self.consume()
+        p = monitored
+
+        while self.hideMask.member(self.LA(1).getType()) or \
+              self.discardMask.member(self.LA(1).getType()):
+            if self.hideMask.member(self.LA(1).getType()):
+                p.setHiddenAfter(self.LA(1))
+                if p != monitored:
+                    self.LA(1).setHiddenBefore(p)
+                p = self.lastHiddenToken = self.LA(1)
+            self.consume()
+        return monitored
+
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+###                       StringBuffer                             ###
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+
+class StringBuffer:
+    def __init__(self,string=None):
+        if string:
+            self.text = list(string)
+        else:
+            self.text = []
+
+    def setLength(self,sz):
+        if not sz :
+            self.text = []
+            return
+        assert sz>0
+        if sz >= self.length():
+            return
+        ### just reset to empty buffer
+        self.text = self.text[0:sz]
+
+    def length(self):
+        return len(self.text)
+
+    def append(self,c):
+        self.text.append(c)
+
+    ### return buffer as string. Arg 'a' is  used  as index
+    ## into the buffer and 2nd argument shall be the length.
+    ## If 2nd args is absent, we return chars till end of
+    ## buffer starting with 'a'.
+    def getString(self,a=None,length=None):
+        if not a :
+            a = 0
+        assert a>=0
+        if a>= len(self.text) :
+            return ""
+
+        if not length:
+            ## no second argument
+            L = self.text[a:]
+        else:
+            assert (a+length) <= len(self.text)
+            b = a + length
+            L = self.text[a:b]
+        s = ""
+        for x in L : s += x
+        return s
+
+    toString = getString ## alias
+
+    def __str__(self):
+        return str(self.text)
+
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+###                       Reader                                   ###
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+
+## When reading Japanese chars, it happens that a stream returns a
+## 'char' of length 2. This looks like  a  bug  in the appropriate
+## codecs - but I'm  rather  unsure about this. Anyway, if this is
+## the case, I'm going to  split  this string into a list of chars
+## and put them  on  hold, ie. on a  buffer. Next time when called
+## we read from buffer until buffer is empty.
+## wh: nov, 25th -> problem does not appear in Python 2.4.0.c1.
+
+class Reader(object):
+    def __init__(self,stream):
+        self.cin = stream
+        self.buf = []
+
+    def read(self,num):
+        assert num==1
+
+        if len(self.buf):
+            return self.buf.pop()
+
+        ## Read a char - this may return a string.
+        ## Is this a bug in codecs/Python?
+        c = self.cin.read(1)
+
+        if not c or len(c)==1:
+            return c
+
+        L = list(c)
+        L.reverse()
+        for x in L:
+            self.buf.append(x)
+
+        ## read one char ..
+        return self.read(1)
+
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+###                       CharScanner                              ###
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+
+class CharScanner(TokenStream):
+    ## class members
+    NO_CHAR = 0
+    EOF_CHAR = ''  ### EOF shall be the empty string.
+
+    def __init__(self, *argv, **kwargs):
+        super(CharScanner, self).__init__()
+        self.saveConsumedInput = True
+        self.tokenClass = None
+        self.caseSensitive = True
+        self.caseSensitiveLiterals = True
+        self.literals = None
+        self.tabsize = 8
+        self._returnToken = None
+        self.commitToPath = False
+        self.traceDepth = 0
+        self.text = StringBuffer()
+        self.hashString = hash(self)
+        self.setTokenObjectClass(CommonToken)
+        self.setInput(*argv)
+
+    def __iter__(self):
+        return CharScannerIterator(self)
+
+    def setInput(self,*argv):
+        ## case 1:
+        ## if there's no arg we default to read from
+        ## standard input
+        if not argv:
+            import sys
+            self.setInput(sys.stdin)
+            return
+
+        ## get 1st argument
+        arg1 = argv[0]
+
+        ## case 2:
+        ## if arg1 is a string,  we assume it's a file name
+        ## and  open  a  stream  using 2nd argument as open
+        ## mode. If there's no 2nd argument we fall back to
+        ## mode '+rb'.
+        if is_string_type(arg1):
+            f = open(arg1,"rb")
+            self.setInput(f)
+            self.setFilename(arg1)
+            return
+
+        ## case 3:
+        ## if arg1 is a file we wrap it by a char buffer (
+        ## some additional checks?? No, can't do this in
+        ## general).
+        if isinstance(arg1,file):
+            self.setInput(CharBuffer(arg1))
+            return
+
+        ## case 4:
+        ## if arg1 is of type SharedLexerInputState we use
+        ## argument as is.
+        if isinstance(arg1,LexerSharedInputState):
+            self.inputState = arg1
+            return
+
+        ## case 5:
+        ## check whether argument type is of type input
+        ## buffer. If so create a SharedLexerInputState and
+        ## go ahead.
+        if isinstance(arg1,InputBuffer):
+            self.setInput(LexerSharedInputState(arg1))
+            return
+
+        ## case 6:
+        ## check whether argument type has a method read(int)
+        ## If so create CharBuffer ...
+        try:
+            if arg1.read:
+                rd = Reader(arg1)
+                cb = CharBuffer(rd)
+                ss = LexerSharedInputState(cb)
+                self.inputState = ss
+            return
+        except:
+            pass
+
+        ## case 7:
+        ## raise wrong argument exception
+        raise TypeError(argv)
+
+    def setTabSize(self,size) :
+        self.tabsize = size
+
+    def getTabSize(self) :
+        return self.tabsize
+
+    def setCaseSensitive(self,t) :
+        self.caseSensitive = t
+
+    def setCommitToPath(self,commit) :
+        self.commitToPath = commit
+
+    def setFilename(self,f) :
+        self.inputState.filename = f
+
+    def setLine(self,line) :
+        self.inputState.line = line
+
+    def setText(self,s) :
+        self.resetText()
+        self.text.append(s)
+
+    def getCaseSensitive(self) :
+        return self.caseSensitive
+
+    def getCaseSensitiveLiterals(self) :
+        return self.caseSensitiveLiterals
+
+    def getColumn(self) :
+        return self.inputState.column
+
+    def setColumn(self,c) :
+        self.inputState.column = c
+
+    def getCommitToPath(self) :
+        return self.commitToPath
+
+    def getFilename(self) :
+        return self.inputState.filename
+
+    def getInputBuffer(self) :
+        return self.inputState.input
+
+    def getInputState(self) :
+        return self.inputState
+
+    def setInputState(self,state) :
+        assert isinstance(state,LexerSharedInputState)
+        self.inputState = state
+
+    def getLine(self) :
+        return self.inputState.line
+
+    def getText(self) :
+        return str(self.text)
+
+    def getTokenObject(self) :
+        return self._returnToken
+
+    def LA(self,i) :
+        c = self.inputState.input.LA(i)
+        if not self.caseSensitive:
+            ### E0006
+            c = c.__class__.lower(c)
+        return c
+
+    def makeToken(self,type) :
+        try:
+            ## dynamically load a class
+            assert self.tokenClass
+            tok = self.tokenClass()
+            tok.setType(type)
+            tok.setColumn(self.inputState.tokenStartColumn)
+            tok.setLine(self.inputState.tokenStartLine)
+            return tok
+        except:
+            self.panic("unable to create new token")
+        return Token.badToken
+
+    def mark(self) :
+        return self.inputState.input.mark()
+
+    def _match_bitset(self,b) :
+        if b.member(self.LA(1)):
+            self.consume()
+        else:
+            raise MismatchedCharException(self.LA(1), b, False, self)
+
+    def _match_string(self,s) :
+        for c in s:
+            if self.LA(1) == c:
+                self.consume()
+            else:
+                raise MismatchedCharException(self.LA(1), c, False, self)
+
+    def match(self,item):
+        if is_string_type(item):
+            return self._match_string(item)
+        else:
+            return self._match_bitset(item)
+
+    def matchNot(self,c) :
+        if self.LA(1) != c:
+            self.consume()
+        else:
+            raise MismatchedCharException(self.LA(1), c, True, self)
+
+    def matchRange(self,c1,c2) :
+        if self.LA(1) < c1 or self.LA(1) > c2 :
+            raise MismatchedCharException(self.LA(1), c1, c2, False, self)
+        else:
+            self.consume()
+
+    def newline(self) :
+        self.inputState.line += 1
+        self.inputState.column = 1
+
+    def tab(self) :
+        c = self.getColumn()
+        nc = ( ((c-1)/self.tabsize) + 1) * self.tabsize + 1
+        self.setColumn(nc)
+
+    def panic(self,s='') :
+        print "CharScanner: panic: " + s
+        sys.exit(1)
+
+    def reportError(self,ex) :
+        print ex
+
+    def reportError(self,s) :
+        if not self.getFilename():
+            print "error: " + str(s)
+        else:
+            print self.getFilename() + ": error: " + str(s)
+
+    def reportWarning(self,s) :
+        if not self.getFilename():
+            print "warning: " + str(s)
+        else:
+            print self.getFilename() + ": warning: " + str(s)
+
+    def resetText(self) :
+        self.text.setLength(0)
+        self.inputState.tokenStartColumn = self.inputState.column
+        self.inputState.tokenStartLine = self.inputState.line
+
+    def rewind(self,pos) :
+        self.inputState.input.rewind(pos)
+
+    def setTokenObjectClass(self,cl):
+        self.tokenClass = cl
+
+    def testForLiteral(self,token):
+        if not token:
+            return
+        assert isinstance(token,Token)
+
+        _type = token.getType()
+
+        ## special tokens can't be literals
+        if _type in [SKIP,INVALID_TYPE,EOF_TYPE,NULL_TREE_LOOKAHEAD] :
+            return
+
+        _text = token.getText()
+        if not _text:
+            return
+
+        assert is_string_type(_text)
+        _type = self.testLiteralsTable(_text,_type)
+        token.setType(_type)
+        return _type
+
+    def testLiteralsTable(self,*args):
+        if is_string_type(args[0]):
+            s = args[0]
+            i = args[1]
+        else:
+            s = self.text.getString()
+            i = args[0]
+
+        ## check whether integer has been given
+        if not isinstance(i,int):
+            assert isinstance(i,int)
+
+        ## check whether we have a dict
+        assert isinstance(self.literals,dict)
+        try:
+            ## E0010
+            if not self.caseSensitiveLiterals:
+                s = s.__class__.lower(s)
+            i = self.literals[s]
+        except:
+            pass
+        return i
+
+    def toLower(self,c):
+        return c.__class__.lower()
+
+    def traceIndent(self):
+        print ' ' * self.traceDepth
+
+    def traceIn(self,rname):
+        self.traceDepth += 1
+        self.traceIndent()
+        print "> lexer %s c== %s" % (rname,self.LA(1))
+
+    def traceOut(self,rname):
+        self.traceIndent()
+        print "< lexer %s c== %s" % (rname,self.LA(1))
+        self.traceDepth -= 1
+
+    def uponEOF(self):
+        pass
+
+    def append(self,c):
+        if self.saveConsumedInput :
+            self.text.append(c)
+
+    def commit(self):
+        self.inputState.input.commit()
+
+    def consume(self):
+        if not self.inputState.guessing:
+            c = self.LA(1)
+            if self.caseSensitive:
+                self.append(c)
+            else:
+                # use input.LA(), not LA(), to get original case
+                # CharScanner.LA() would toLower it.
+                c =  self.inputState.input.LA(1)
+                self.append(c)
+
+            if c and c in "\t":
+                self.tab()
+            else:
+                self.inputState.column += 1
+        self.inputState.input.consume()
+
+    ## Consume chars until one matches the given char
+    def consumeUntil_char(self,c):
+        while self.LA(1) != EOF_CHAR and self.LA(1) != c:
+            self.consume()
+
+    ## Consume chars until one matches the given set
+    def consumeUntil_bitset(self,bitset):
+        while self.LA(1) != EOF_CHAR and not self.set.member(self.LA(1)):
+            self.consume()
+
+    ### If symbol seen is EOF then generate and set token, otherwise
+    ### throw exception.
+    def default(self,la1):
+        if not la1 :
+            self.uponEOF()
+            self._returnToken = self.makeToken(EOF_TYPE)
+        else:
+            self.raise_NoViableAlt(la1)
+
+    def filterdefault(self,la1,*args):
+        if not la1:
+            self.uponEOF()
+            self._returnToken = self.makeToken(EOF_TYPE)
+            return
+
+        if not args:
+            self.consume()
+            raise TryAgain()
+        else:
+            ### apply filter object
+            self.commit();
+            try:
+                func=args[0]
+                args=args[1:]
+                apply(func,args)
+            except RecognitionException, e:
+                ## catastrophic failure
+                self.reportError(e);
+                self.consume();
+            raise TryAgain()
+
+    def raise_NoViableAlt(self,la1=None):
+        if not la1: la1 = self.LA(1)
+        fname = self.getFilename()
+        line  = self.getLine()
+        col   = self.getColumn()
+        raise NoViableAltForCharException(la1,fname,line,col)
+
+    def set_return_token(self,_create,_token,_ttype,_offset):
+        if _create and not _token and (not _ttype == SKIP):
+            string = self.text.getString(_offset)
+            _token = self.makeToken(_ttype)
+            _token.setText(string)
+        self._returnToken = _token
+        return _token
+
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+###                   CharScannerIterator                          ###
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+
+class CharScannerIterator:
+
+    def __init__(self,inst):
+        if isinstance(inst,CharScanner):
+            self.inst = inst
+            return
+        raise TypeError("CharScannerIterator requires CharScanner object")
+
+    def next(self):
+        assert self.inst
+        item = self.inst.nextToken()
+        if not item or item.isEOF():
+            raise StopIteration()
+        return item
+
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+###                       BitSet                                   ###
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+
+### I'm assuming here that a long is 64bits. It appears however, that
+### a long is of any size. That means we can use a single long as the
+### bitset (!), ie. Python would do almost all the work (TBD).
+
+class BitSet(object):
+    BITS     = 64
+    NIBBLE   = 4
+    LOG_BITS = 6
+    MOD_MASK = BITS -1
+
+    def __init__(self,data=None):
+        if not data:
+            BitSet.__init__(self,[long(0)])
+            return
+        if isinstance(data,int):
+            BitSet.__init__(self,[long(data)])
+            return
+        if isinstance(data,long):
+            BitSet.__init__(self,[data])
+            return
+        if not isinstance(data,list):
+            raise TypeError("BitSet requires integer, long, or " +
+                            "list argument")
+        for x in data:
+            if not isinstance(x,long):
+                raise TypeError(self,"List argument item is " +
+                                "not a long: %s" % (x))
+        self.data = data
+
+    def __str__(self):
+        bits = len(self.data) * BitSet.BITS
+        s = ""
+        for i in xrange(0,bits):
+            if self.at(i):
+                s += "1"
+            else:
+                s += "o"
+            if not ((i+1) % 10):
+                s += '|%s|' % (i+1)
+        return s
+
+    def __repr__(self):
+        return str(self)
+
+    def member(self,item):
+        if not item:
+            return False
+
+        if isinstance(item,int):
+            return self.at(item)
+
+        if not is_string_type(item):
+            raise TypeError(self,"char or unichar expected: %s" % (item))
+
+        ## char is a (unicode) string with at most lenght 1, ie.
+        ## a char.
+
+        if len(item) != 1:
+            raise TypeError(self,"char expected: %s" % (item))
+
+        ### handle ASCII/UNICODE char
+        num = ord(item)
+
+        ### check whether position num is in bitset
+        return self.at(num)
+
+    def wordNumber(self,bit):
+        return bit >> BitSet.LOG_BITS
+
+    def bitMask(self,bit):
+        pos = bit & BitSet.MOD_MASK  ## bit mod BITS
+        return (1L << pos)
+
+    def set(self,bit,on=True):
+        # grow bitset as required (use with care!)
+        i = self.wordNumber(bit)
+        mask = self.bitMask(bit)
+        if i>=len(self.data):
+            d = i - len(self.data) + 1
+            for x in xrange(0,d):
+                self.data.append(0L)
+            assert len(self.data) == i+1
+        if on:
+            self.data[i] |=  mask
+        else:
+            self.data[i] &= (~mask)
+
+    ### make add an alias for set
+    add = set
+
+    def off(self,bit,off=True):
+        self.set(bit,not off)
+
+    def at(self,bit):
+        i = self.wordNumber(bit)
+        v = self.data[i]
+        m = self.bitMask(bit)
+        return v & m
+
+
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+###                      some further funcs                        ###
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+
+def illegalarg_ex(func):
+    raise ValueError(
+       "%s is only valid if parser is built for debugging" %
+       (func.func_name))
+
+def runtime_ex(func):
+    raise RuntimeException(
+       "%s is only valid if parser is built for debugging" %
+       (func.func_name))
+
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+###                       TokenBuffer                              ###
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+
+class TokenBuffer(object):
+    def __init__(self,stream):
+        self.input = stream
+        self.nMarkers = 0
+        self.markerOffset = 0
+        self.numToConsume = 0
+        self.queue = Queue()
+
+    def reset(self) :
+        self.nMarkers = 0
+        self.markerOffset = 0
+        self.numToConsume = 0
+        self.queue.reset()
+
+    def consume(self) :
+        self.numToConsume += 1
+
+    def fill(self, amount):
+        self.syncConsume()
+        while self.queue.length() < (amount + self.markerOffset):
+            self.queue.append(self.input.nextToken())
+
+    def getInput(self):
+        return self.input
+
+    def LA(self,k) :
+        self.fill(k)
+        return self.queue.elementAt(self.markerOffset + k - 1).type
+
+    def LT(self,k) :
+        self.fill(k)
+        return self.queue.elementAt(self.markerOffset + k - 1)
+
+    def mark(self) :
+        self.syncConsume()
+        self.nMarkers += 1
+        return self.markerOffset
+
+    def rewind(self,mark) :
+        self.syncConsume()
+        self.markerOffset = mark
+        self.nMarkers -= 1
+
+    def syncConsume(self) :
+        while self.numToConsume > 0:
+            if self.nMarkers > 0:
+                # guess mode -- leave leading characters and bump offset.
+                self.markerOffset += 1
+            else:
+                # normal mode -- remove first character
+                self.queue.removeFirst()
+            self.numToConsume -= 1
+
+    def __str__(self):
+        return "(%s,%s,%s,%s,%s)" % (
+           self.input,
+           self.nMarkers,
+           self.markerOffset,
+           self.numToConsume,
+           self.queue)
+
+    def __repr__(self):
+        return str(self)
+
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+###                       ParserSharedInputState                   ###
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+
+class ParserSharedInputState(object):
+
+    def __init__(self):
+        self.input = None
+        self.reset()
+
+    def reset(self):
+        self.guessing = 0
+        self.filename = None
+        if self.input:
+            self.input.reset()
+
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+###                       Parser                                   ###
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+
+class Parser(object):
+
+    def __init__(self, *args, **kwargs):
+        self.tokenNames = None
+        self.returnAST  = None
+        self.astFactory = None
+        self.tokenTypeToASTClassMap = {}
+        self.ignoreInvalidDebugCalls = False
+        self.traceDepth = 0
+        if not args:
+            self.inputState = ParserSharedInputState()
+            return
+        arg0 = args[0]
+        assert isinstance(arg0,ParserSharedInputState)
+        self.inputState = arg0
+        return
+
+    def getTokenTypeToASTClassMap(self):
+        return self.tokenTypeToASTClassMap
+
+
+    def addMessageListener(self, l):
+        if not self.ignoreInvalidDebugCalls:
+            illegalarg_ex(addMessageListener)
+
+    def addParserListener(self,l) :
+        if (not self.ignoreInvalidDebugCalls) :
+            illegalarg_ex(addParserListener)
+
+    def addParserMatchListener(self, l) :
+        if (not self.ignoreInvalidDebugCalls) :
+            illegalarg_ex(addParserMatchListener)
+
+    def addParserTokenListener(self, l) :
+        if (not self.ignoreInvalidDebugCalls):
+            illegalarg_ex(addParserTokenListener)
+
+    def addSemanticPredicateListener(self, l) :
+        if (not self.ignoreInvalidDebugCalls):
+            illegalarg_ex(addSemanticPredicateListener)
+
+    def addSyntacticPredicateListener(self, l) :
+        if (not self.ignoreInvalidDebugCalls):
+            illegalarg_ex(addSyntacticPredicateListener)
+
+    def addTraceListener(self, l) :
+        if (not self.ignoreInvalidDebugCalls):
+            illegalarg_ex(addTraceListener)
+
+    def consume(self):
+        raise NotImplementedError()
+
+    def _consumeUntil_type(self,tokenType):
+        while self.LA(1) != EOF_TYPE and self.LA(1) != tokenType:
+            self.consume()
+
+    def _consumeUntil_bitset(self, set):
+        while self.LA(1) != EOF_TYPE and not set.member(self.LA(1)):
+            self.consume()
+
+    def consumeUntil(self,arg):
+        if isinstance(arg,int):
+            self._consumeUntil_type(arg)
+        else:
+            self._consumeUntil_bitset(arg)
+
+    def defaultDebuggingSetup(self):
+        pass
+
+    def getAST(self) :
+        return self.returnAST
+
+    def getASTFactory(self) :
+        return self.astFactory
+
+    def getFilename(self) :
+        return self.inputState.filename
+
+    def getInputState(self) :
+        return self.inputState
+
+    def setInputState(self, state) :
+        self.inputState = state
+
+    def getTokenName(self,num) :
+        return self.tokenNames[num]
+
+    def getTokenNames(self) :
+        return self.tokenNames
+
+    def isDebugMode(self) :
+        return self.false
+
+    def LA(self, i):
+        raise NotImplementedError()
+
+    def LT(self, i):
+        raise NotImplementedError()
+
+    def mark(self):
+        return self.inputState.input.mark()
+
+    def _match_int(self,t):
+        if (self.LA(1) != t):
+            raise MismatchedTokenException(
+               self.tokenNames, self.LT(1), t, False, self.getFilename())
+        else:
+            self.consume()
+
+    def _match_set(self, b):
+        if (not b.member(self.LA(1))):
+            raise MismatchedTokenException(
+               self.tokenNames,self.LT(1), b, False, self.getFilename())
+        else:
+            self.consume()
+
+    def match(self,set) :
+        if isinstance(set,int):
+            self._match_int(set)
+            return
+        if isinstance(set,BitSet):
+            self._match_set(set)
+            return
+        raise TypeError("Parser.match requires integer ot BitSet argument")
+
+    def matchNot(self,t):
+        if self.LA(1) == t:
+            raise MismatchedTokenException(
+               tokenNames, self.LT(1), t, True, self.getFilename())
+        else:
+            self.consume()
+
+    def removeMessageListener(self, l) :
+        if (not self.ignoreInvalidDebugCalls):
+            runtime_ex(removeMessageListener)
+
+    def removeParserListener(self, l) :
+        if (not self.ignoreInvalidDebugCalls):
+            runtime_ex(removeParserListener)
+
+    def removeParserMatchListener(self, l) :
+        if (not self.ignoreInvalidDebugCalls):
+            runtime_ex(removeParserMatchListener)
+
+    def removeParserTokenListener(self, l) :
+        if (not self.ignoreInvalidDebugCalls):
+            runtime_ex(removeParserTokenListener)
+
+    def removeSemanticPredicateListener(self, l) :
+        if (not self.ignoreInvalidDebugCalls):
+            runtime_ex(removeSemanticPredicateListener)
+
+    def removeSyntacticPredicateListener(self, l) :
+        if (not self.ignoreInvalidDebugCalls):
+            runtime_ex(removeSyntacticPredicateListener)
+
+    def removeTraceListener(self, l) :
+        if (not self.ignoreInvalidDebugCalls):
+            runtime_ex(removeTraceListener)
+
+    def reportError(self,x) :
+        fmt = "syntax error:"
+        f = self.getFilename()
+        if f:
+            fmt = ("%s:" % f) + fmt
+        if isinstance(x,Token):
+            line = x.getColumn()
+            col  = x.getLine()
+            text = x.getText()
+            fmt  = fmt + 'unexpected symbol at line %s (column %s) : "%s"'
+            print >>sys.stderr, fmt % (line,col,text)
+        else:
+            print >>sys.stderr, fmt,str(x)
+
+    def reportWarning(self,s):
+        f = self.getFilename()
+        if f:
+            print "%s:warning: %s" % (f,str(x))
+        else:
+            print "warning: %s" % (str(x))
+
+    def rewind(self, pos) :
+        self.inputState.input.rewind(pos)
+
+    def setASTFactory(self, f) :
+        self.astFactory = f
+
+    def setASTNodeClass(self, cl) :
+        self.astFactory.setASTNodeType(cl)
+
+    def setASTNodeType(self, nodeType) :
+        self.setASTNodeClass(nodeType)
+
+    def setDebugMode(self, debugMode) :
+        if (not self.ignoreInvalidDebugCalls):
+            runtime_ex(setDebugMode)
+
+    def setFilename(self, f) :
+        self.inputState.filename = f
+
+    def setIgnoreInvalidDebugCalls(self, value) :
+        self.ignoreInvalidDebugCalls = value
+
+    def setTokenBuffer(self, t) :
+        self.inputState.input = t
+
+    def traceIndent(self):
+        print " " * self.traceDepth
+
+    def traceIn(self,rname):
+        self.traceDepth += 1
+        self.trace("> ", rname)
+
+    def traceOut(self,rname):
+        self.trace("< ", rname)
+        self.traceDepth -= 1
+
+    ### wh: moved from ASTFactory to Parser
+    def addASTChild(self,currentAST, child):
+        if not child:
+            return
+        if not currentAST.root:
+            currentAST.root = child
+        elif not currentAST.child:
+            currentAST.root.setFirstChild(child)
+        else:
+            currentAST.child.setNextSibling(child)
+        currentAST.child = child
+        currentAST.advanceChildToEnd()
+
+    ### wh: moved from ASTFactory to Parser
+    def makeASTRoot(self,currentAST,root) :
+        if root:
+            ### Add the current root as a child of new root
+            root.addChild(currentAST.root)
+            ### The new current child is the last sibling of the old root
+            currentAST.child = currentAST.root
+            currentAST.advanceChildToEnd()
+            ### Set the new root
+            currentAST.root = root
+
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+###                       LLkParser                                ###
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+
+class LLkParser(Parser):
+
+    def __init__(self, *args, **kwargs):
+        try:
+            arg1 = args[0]
+        except:
+            arg1 = 1
+
+        if isinstance(arg1,int):
+            super(LLkParser,self).__init__()
+            self.k = arg1
+            return
+
+        if isinstance(arg1,ParserSharedInputState):
+            super(LLkParser,self).__init__(arg1)
+            self.set_k(1,*args)
+            return
+
+        if isinstance(arg1,TokenBuffer):
+            super(LLkParser,self).__init__()
+            self.setTokenBuffer(arg1)
+            self.set_k(1,*args)
+            return
+
+        if isinstance(arg1,TokenStream):
+            super(LLkParser,self).__init__()
+            tokenBuf = TokenBuffer(arg1)
+            self.setTokenBuffer(tokenBuf)
+            self.set_k(1,*args)
+            return
+
+        ### unknown argument
+        raise TypeError("LLkParser requires integer, " +
+                        "ParserSharedInputStream or TokenStream argument")
+
+    def consume(self):
+        self.inputState.input.consume()
+
+    def LA(self,i):
+        return self.inputState.input.LA(i)
+
+    def LT(self,i):
+        return self.inputState.input.LT(i)
+
+    def set_k(self,index,*args):
+        try:
+            self.k = args[index]
+        except:
+            self.k = 1
+
+    def trace(self,ee,rname):
+        print type(self)
+        self.traceIndent()
+        guess = ""
+        if self.inputState.guessing > 0:
+            guess = " [guessing]"
+        print(ee + rname + guess)
+        for i in xrange(1,self.k+1):
+            if i != 1:
+                print(", ")
+            if self.LT(i) :
+                v = self.LT(i).getText()
+            else:
+                v = "null"
+            print "LA(%s) == %s" % (i,v)
+        print("\n")
+
+    def traceIn(self,rname):
+        self.traceDepth += 1;
+        self.trace("> ", rname);
+
+    def traceOut(self,rname):
+        self.trace("< ", rname);
+        self.traceDepth -= 1;
+
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+###                    TreeParserSharedInputState                  ###
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+
+class TreeParserSharedInputState(object):
+    def __init__(self):
+        self.guessing = 0
+
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+###                       TreeParser                               ###
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+
+class TreeParser(object):
+
+    def __init__(self, *args, **kwargs):
+        self.inputState = TreeParserSharedInputState()
+        self._retTree   = None
+        self.tokenNames = []
+        self.returnAST  = None
+        self.astFactory = ASTFactory()
+        self.traceDepth = 0
+
+    def getAST(self):
+        return self.returnAST
+
+    def getASTFactory(self):
+        return self.astFactory
+
+    def getTokenName(self,num) :
+        return self.tokenNames[num]
+
+    def getTokenNames(self):
+        return self.tokenNames
+
+    def match(self,t,set) :
+        assert isinstance(set,int) or isinstance(set,BitSet)
+        if not t or t == ASTNULL:
+            raise MismatchedTokenException(self.getTokenNames(), t,set, False)
+
+        if isinstance(set,int) and t.getType() != set:
+            raise MismatchedTokenException(self.getTokenNames(), t,set, False)
+
+        if isinstance(set,BitSet) and not set.member(t.getType):
+            raise MismatchedTokenException(self.getTokenNames(), t,set, False)
+
+    def matchNot(self,t, ttype) :
+        if not t or (t == ASTNULL) or (t.getType() == ttype):
+            raise MismatchedTokenException(getTokenNames(), t, ttype, True)
+
+    def reportError(self,ex):
+        print >>sys.stderr,"error:",ex
+
+    def  reportWarning(self, s):
+        print "warning:",s
+
+    def setASTFactory(self,f):
+        self.astFactory = f
+
+    def setASTNodeType(self,nodeType):
+        self.setASTNodeClass(nodeType)
+
+    def setASTNodeClass(self,nodeType):
+        self.astFactory.setASTNodeType(nodeType)
+
+    def traceIndent(self):
+        print " " * self.traceDepth
+
+    def traceIn(self,rname,t):
+        self.traceDepth += 1
+        self.traceIndent()
+        print("> " + rname + "(" +
+              ifelse(t,str(t),"null") + ")" +
+              ifelse(self.inputState.guessing>0,"[guessing]",""))
+
+    def traceOut(self,rname,t):
+        self.traceIndent()
+        print("< " + rname + "(" +
+              ifelse(t,str(t),"null") + ")" +
+              ifelse(self.inputState.guessing>0,"[guessing]",""))
+        self.traceDepth -= 1
+
+    ### wh: moved from ASTFactory to TreeParser
+    def addASTChild(self,currentAST, child):
+        if not child:
+            return
+        if not currentAST.root:
+            currentAST.root = child
+        elif not currentAST.child:
+            currentAST.root.setFirstChild(child)
+        else:
+            currentAST.child.setNextSibling(child)
+        currentAST.child = child
+        currentAST.advanceChildToEnd()
+
+    ### wh: moved from ASTFactory to TreeParser
+    def makeASTRoot(self,currentAST,root):
+        if root:
+            ### Add the current root as a child of new root
+            root.addChild(currentAST.root)
+            ### The new current child is the last sibling of the old root
+            currentAST.child = currentAST.root
+            currentAST.advanceChildToEnd()
+            ### Set the new root
+            currentAST.root = root
+
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+###               funcs to work on trees                           ###
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+
+def rightmost(ast):
+    if ast:
+        while(ast.right):
+            ast = ast.right
+    return ast
+
+def cmptree(s,t,partial):
+    while(s and t):
+        ### as a quick optimization, check roots first.
+        if not s.equals(t):
+            return False
+
+        ### if roots match, do full list match test on children.
+        if not cmptree(s.getFirstChild(),t.getFirstChild(),partial):
+            return False
+
+        s = s.getNextSibling()
+        t = t.getNextSibling()
+
+    r = ifelse(partial,not t,not s and not t)
+    return r
+
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+###                          AST                                   ###
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+
+class AST(object):
+    def __init__(self):
+        pass
+
+    def addChild(self, c):
+        pass
+
+    def equals(self, t):
+        return False
+
+    def equalsList(self, t):
+        return False
+
+    def equalsListPartial(self, t):
+        return False
+
+    def equalsTree(self, t):
+        return False
+
+    def equalsTreePartial(self, t):
+        return False
+
+    def findAll(self, tree):
+        return None
+
+    def findAllPartial(self, subtree):
+        return None
+
+    def getFirstChild(self):
+        return self
+
+    def getNextSibling(self):
+        return self
+
+    def getText(self):
+        return ""
+
+    def getType(self):
+        return INVALID_TYPE
+
+    def getLine(self):
+        return 0
+
+    def getColumn(self):
+        return 0
+
+    def getNumberOfChildren(self):
+        return 0
+
+    def initialize(self, t, txt):
+        pass
+
+    def initialize(self, t):
+        pass
+
+    def setFirstChild(self, c):
+        pass
+
+    def setNextSibling(self, n):
+        pass
+
+    def setText(self, text):
+        pass
+
+    def setType(self, ttype):
+        pass
+
+    def toString(self):
+        self.getText()
+
+    __str__ = toString
+
+    def toStringList(self):
+        return self.getText()
+
+    def toStringTree(self):
+        return self.getText()
+
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+###                       ASTNULLType                              ###
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+
+### There is only one instance of this class **/
+class ASTNULLType(AST):
+    def __init__(self):
+        AST.__init__(self)
+        pass
+
+    def getText(self):
+        return "<ASTNULL>"
+
+    def getType(self):
+        return NULL_TREE_LOOKAHEAD
+
+
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+###                       BaseAST                                  ###
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+
+class BaseAST(AST):
+
+    verboseStringConversion = False
+    tokenNames = None
+
+    def __init__(self):
+        self.down  = None ## kid
+        self.right = None ## sibling
+
+    def addChild(self,node):
+        if node:
+            t = rightmost(self.down)
+            if t:
+                t.right = node
+            else:
+                assert not self.down
+                self.down = node
+
+    def getNumberOfChildren(self):
+        t = self.down
+        n = 0
+        while t:
+            n += 1
+            t = t.right
+        return n
+
+    def doWorkForFindAll(self,v,target,partialMatch):
+        sibling = self
+
+        while sibling:
+            c1 = partialMatch and sibling.equalsTreePartial(target)
+            if c1:
+                v.append(sibling)
+            else:
+                c2 = not partialMatch and sibling.equalsTree(target)
+                if c2:
+                    v.append(sibling)
+
+            ### regardless of match or not, check any children for matches
+            if sibling.getFirstChild():
+                sibling.getFirstChild().doWorkForFindAll(v,target,partialMatch)
+
+            sibling = sibling.getNextSibling()
+
+    ### Is node t equal to 'self' in terms of token type and text?
+    def equals(self,t):
+        if not t:
+            return False
+        return self.getText() == t.getText() and self.getType() == t.getType()
+
+    ### Is t an exact structural and equals() match of this tree.  The
+    ### 'self' reference is considered the start of a sibling list.
+    ###
+    def equalsList(self, t):
+        return cmptree(self, t, partial=False)
+
+    ### Is 't' a subtree of this list?
+    ### The siblings of the root are NOT ignored.
+    ###
+    def equalsListPartial(self,t):
+        return cmptree(self,t,partial=True)
+
+    ### Is tree rooted at 'self' equal to 't'?  The siblings
+    ### of 'self' are ignored.
+    ###
+    def equalsTree(self, t):
+        return self.equals(t) and \
+               cmptree(self.getFirstChild(), t.getFirstChild(), partial=False)
+
+    ### Is 't' a subtree of the tree rooted at 'self'?  The siblings
+    ### of 'self' are ignored.
+    ###
+    def equalsTreePartial(self, t):
+        if not t:
+            return True
+        return self.equals(t) and cmptree(
+           self.getFirstChild(), t.getFirstChild(), partial=True)
+
+    ### Walk the tree looking for all exact subtree matches.  Return
+    ### an ASTEnumerator that lets the caller walk the list
+    ### of subtree roots found herein.
+    def findAll(self,target):
+        roots = []
+
+        ### the empty tree cannot result in an enumeration
+        if not target:
+            return None
+        # find all matches recursively
+        self.doWorkForFindAll(roots, target, False)
+        return roots
+
+    ### Walk the tree looking for all subtrees.  Return
+    ###  an ASTEnumerator that lets the caller walk the list
+    ###  of subtree roots found herein.
+    def findAllPartial(self,sub):
+        roots = []
+
+        ### the empty tree cannot result in an enumeration
+        if not sub:
+            return None
+
+        self.doWorkForFindAll(roots, sub, True)  ### find all matches recursively
+        return roots
+
+    ### Get the first child of this node None if not children
+    def getFirstChild(self):
+        return self.down
+
+    ### Get the next sibling in line after this one
+    def getNextSibling(self):
+        return self.right
+
+    ### Get the token text for this node
+    def getText(self):
+        return ""
+
+    ### Get the token type for this node
+    def getType(self):
+        return 0
+
+    def getLine(self):
+        return 0
+
+    def getColumn(self):
+        return 0
+
+    ### Remove all children */
+    def removeChildren(self):
+        self.down = None
+
+    def setFirstChild(self,c):
+        self.down = c
+
+    def setNextSibling(self, n):
+        self.right = n
+
+    ### Set the token text for this node
+    def setText(self, text):
+        pass
+
+    ### Set the token type for this node
+    def setType(self, ttype):
+        pass
+
+    ### static
+    def setVerboseStringConversion(verbose,names):
+        verboseStringConversion = verbose
+        tokenNames = names
+    setVerboseStringConversion = staticmethod(setVerboseStringConversion)
+
+    ### Return an array of strings that maps token ID to it's text.
+    ##  @since 2.7.3
+    def getTokenNames():
+        return tokenNames
+
+    def toString(self):
+        return self.getText()
+
+    ### return tree as lisp string - sibling included
+    def toStringList(self):
+        ts = self.toStringTree()
+        sib = self.getNextSibling()
+        if sib:
+            ts += sib.toStringList()
+        return ts
+
+    __str__ = toStringList
+
+    ### return tree as string - siblings ignored
+    def toStringTree(self):
+        ts = ""
+        kid = self.getFirstChild()
+        if kid:
+            ts += " ("
+        ts += " " + self.toString()
+        if kid:
+            ts += kid.toStringList()
+            ts += " )"
+        return ts
+
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+###                       CommonAST                                ###
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+
+### Common AST node implementation
+class CommonAST(BaseAST):
+    def __init__(self,token=None):
+        super(CommonAST,self).__init__()
+        self.ttype = INVALID_TYPE
+        self.text  = "<no text>"
+        self.line  = 0
+        self.column= 0
+        self.initialize(token)
+        #assert self.text
+
+    ### Get the token text for this node
+    def getText(self):
+        return self.text
+
+    ### Get the token type for this node
+    def getType(self):
+        return self.ttype
+
+    ### Get the line for this node
+    def getLine(self):
+        return self.line
+
+    ### Get the column for this node
+    def getColumn(self):
+        return self.column
+
+    def initialize(self,*args):
+        if not args:
+            return
+
+        arg0 = args[0]
+
+        if isinstance(arg0,int):
+            arg1 = args[1]
+            self.setType(arg0)
+            self.setText(arg1)
+            return
+
+        if isinstance(arg0,AST) or isinstance(arg0,Token):
+            self.setText(arg0.getText())
+            self.setType(arg0.getType())
+            self.line = arg0.getLine()
+            self.column = arg0.getColumn()
+            return
+
+    ### Set the token text for this node
+    def setText(self,text_):
+        assert is_string_type(text_)
+        self.text = text_
+
+    ### Set the token type for this node
+    def setType(self,ttype_):
+        assert isinstance(ttype_,int)
+        self.ttype = ttype_
+
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+###                     CommonASTWithHiddenTokens                  ###
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+
+class CommonASTWithHiddenTokens(CommonAST):
+
+    def __init__(self,*args):
+        CommonAST.__init__(self,*args)
+        self.hiddenBefore = None
+        self.hiddenAfter  = None
+
+    def getHiddenAfter(self):
+        return self.hiddenAfter
+
+    def getHiddenBefore(self):
+        return self.hiddenBefore
+
+    def initialize(self,*args):
+        CommonAST.initialize(self,*args)
+        if args and isinstance(args[0],Token):
+            assert isinstance(args[0],CommonHiddenStreamToken)
+            self.hiddenBefore = args[0].getHiddenBefore()
+            self.hiddenAfter  = args[0].getHiddenAfter()
+
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+###                       ASTPair                                  ###
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+
+class ASTPair(object):
+    def __init__(self):
+        self.root = None          ### current root of tree
+        self.child = None         ### current child to which siblings are added
+
+    ### Make sure that child is the last sibling */
+    def advanceChildToEnd(self):
+        if self.child:
+            while self.child.getNextSibling():
+                self.child = self.child.getNextSibling()
+
+    ### Copy an ASTPair.  Don't call it clone() because we want type-safety */
+    def copy(self):
+        tmp = ASTPair()
+        tmp.root = self.root
+        tmp.child = self.child
+        return tmp
+
+    def toString(self):
+        r = ifelse(not root,"null",self.root.getText())
+        c = ifelse(not child,"null",self.child.getText())
+        return "[%s,%s]" % (r,c)
+
+    __str__ = toString
+    __repr__ = toString
+
+
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+###                       ASTFactory                               ###
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+
+class ASTFactory(object):
+    def __init__(self,table=None):
+        self._class = None
+        self._classmap = ifelse(table,table,None)
+
+    def create(self,*args):
+        if not args:
+            return self.create(INVALID_TYPE)
+
+        arg0 = args[0]
+        arg1 = None
+        arg2 = None
+
+        try:
+            arg1 = args[1]
+            arg2 = args[2]
+        except:
+            pass
+
+        # ctor(int)
+        if isinstance(arg0,int) and not arg2:
+            ### get class for 'self' type
+            c = self.getASTNodeType(arg0)
+            t = self.create(c)
+            if t:
+                t.initialize(arg0, ifelse(arg1,arg1,""))
+            return t
+
+        # ctor(int,something)
+        if isinstance(arg0,int) and arg2:
+            t = self.create(arg2)
+            if t:
+                t.initialize(arg0,arg1)
+            return t
+
+        # ctor(AST)
+        if isinstance(arg0,AST):
+            t = self.create(arg0.getType())
+            if t:
+                t.initialize(arg0)
+            return t
+
+        # ctor(token)
+        if isinstance(arg0,Token) and not arg1:
+            ttype = arg0.getType()
+            assert isinstance(ttype,int)
+            t = self.create(ttype)
+            if t:
+                t.initialize(arg0)
+            return t
+
+        # ctor(token,class)
+        if isinstance(arg0,Token) and arg1:
+            assert isinstance(arg1,type)
+            assert issubclass(arg1,AST)
+            # this creates instance of 'arg1' using 'arg0' as
+            # argument. Wow, that's magic!
+            t = arg1(arg0)
+            assert t and isinstance(t,AST)
+            return t
+
+        # ctor(class)
+        if isinstance(arg0,type):
+            ### next statement creates instance of type (!)
+            t = arg0()
+            assert isinstance(t,AST)
+            return t
+
+
+    def setASTNodeClass(self,className=None):
+        if not className:
+            return
+        assert isinstance(className,type)
+        assert issubclass(className,AST)
+        self._class = className
+
+    ### kind of misnomer - use setASTNodeClass instead.
+    setASTNodeType = setASTNodeClass
+
+    def getASTNodeClass(self):
+        return self._class
+
+
+
+    def getTokenTypeToASTClassMap(self):
+        return self._classmap
+
+    def setTokenTypeToASTClassMap(self,amap):
+        self._classmap = amap
+
+    def error(self, e):
+        import sys
+        print >> sys.stderr, e
+
+    def setTokenTypeASTNodeType(self, tokenType, className):
+        """
+        Specify a mapping between a token type and a (AST) class.
+        """
+        if not self._classmap:
+            self._classmap = {}
+
+        if not className:
+            try:
+                del self._classmap[tokenType]
+            except:
+                pass
+        else:
+            ### here we should also perform actions to ensure that
+            ### a. class can be loaded
+            ### b. class is a subclass of AST
+            ###
+            assert isinstance(className,type)
+            assert issubclass(className,AST)  ## a & b
+            ### enter the class
+            self._classmap[tokenType] = className
+
+    def getASTNodeType(self,tokenType):
+        """
+        For a given token type return the AST node type. First we
+        lookup a mapping table, second we try _class
+        and finally we resolve to "antlr.CommonAST".
+        """
+
+        # first
+        if self._classmap:
+            try:
+                c = self._classmap[tokenType]
+                if c:
+                    return c
+            except:
+                pass
+        # second
+        if self._class:
+            return self._class
+
+        # default
+        return CommonAST
+
+    ### methods that have been moved to file scope - just listed
+    ### here to be somewhat consistent with original API
+    def dup(self,t):
+        return antlr.dup(t,self)
+
+    def dupList(self,t):
+        return antlr.dupList(t,self)
+
+    def dupTree(self,t):
+        return antlr.dupTree(t,self)
+
+    ### methods moved to other classes
+    ### 1. makeASTRoot  -> Parser
+    ### 2. addASTChild  -> Parser
+
+    ### non-standard: create alias for longish method name
+    maptype = setTokenTypeASTNodeType
+
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+###                       ASTVisitor                               ###
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+
+class ASTVisitor(object):
+    def __init__(self,*args):
+        pass
+
+    def visit(self,ast):
+        pass
+
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+###               static methods and variables                     ###
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx###
+
+ASTNULL = ASTNULLType()
+
+### wh: moved from ASTFactory as there's nothing ASTFactory-specific
+### in this method.
+def make(*nodes):
+    if not nodes:
+        return None
+
+    for i in xrange(0,len(nodes)):
+        node = nodes[i]
+        if node:
+            assert isinstance(node,AST)
+
+    root = nodes[0]
+    tail = None
+    if root:
+        root.setFirstChild(None)
+
+    for i in xrange(1,len(nodes)):
+        if not nodes[i]:
+            continue
+        if not root:
+            root = tail = nodes[i]
+        elif not tail:
+            root.setFirstChild(nodes[i])
+            tail = root.getFirstChild()
+        else:
+            tail.setNextSibling(nodes[i])
+            tail = tail.getNextSibling()
+
+        ### Chase tail to last sibling
+        while tail.getNextSibling():
+            tail = tail.getNextSibling()
+    return root
+
+def dup(t,factory):
+    if not t:
+        return None
+
+    if factory:
+        dup_t = factory.create(t.__class__)
+    else:
+        raise TypeError("dup function requires ASTFactory argument")
+    dup_t.initialize(t)
+    return dup_t
+
+def dupList(t,factory):
+    result = dupTree(t,factory)
+    nt = result
+    while t:
+        ## for each sibling of the root
+        t = t.getNextSibling()
+        nt.setNextSibling(dupTree(t,factory))
+        nt = nt.getNextSibling()
+    return result
+
+def dupTree(t,factory):
+    result = dup(t,factory)
+    if t:
+        result.setFirstChild(dupList(t.getFirstChild(),factory))
+    return result
+
+###xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
+### $Id: antlr.py 3750 2009-02-13 00:13:04Z sjmachin $
+
+# Local Variables:    ***
+# mode: python        ***
+# py-indent-offset: 4 ***
+# End:                ***
diff --git a/tablib/packages/xlwt/doc/xlwt.html b/tablib/packages/xlwt/doc/xlwt.html
new file mode 100644
index 0000000..6efb698
--- /dev/null
+++ b/tablib/packages/xlwt/doc/xlwt.html
@@ -0,0 +1,199 @@
+<!DOCTYPE html PUBLIC '-//W3C//DTD XHTML 1.0 Strict//EN' 'http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd'>
+<html>
+<head>
+<meta http-equiv='Content-Type' content='text/html; charset=us-ascii' />
+<title>The xlwt Module</title>
+</head>
+<body>
+<h1>The xlwt Module</h1>
+<p /><p><b>A Python package for generating Microsoft Excel &#8482; spreadsheet files.
+</b></p>
+
+<h2>General information</h2>
+
+<h3>State of Documentation</h3>
+
+<p>
+This documentation is currently incomplete. There may be methods and
+classes not included and any item marked with a <em
+style="color:red;">[NC]</em> is not complete and may have further
+parameters, methods, attributes and functionality that are not
+documented. In these cases, you'll have to refer to the source if the
+documentation provided is insufficient.
+</p>
+
+</p>
+
+<h2>Module Contents <em style="color:red;">[NC]</em></h2>
+<dl>
+  <dt><b>easyxf</b> (function)</dt>
+  <dd>
+  <p>
+  This function is used to create and configure XFStyle objects
+  for use with (for example) the Worksheet.write method.
+  </p>
+  <dl>
+    <dt><i>strg_to_parse</i></dt>
+    <dd>
+      <p>
+      	A string to be parsed to obtain attribute values for Alignment, Borders, Font,
+      	Pattern and Protection objects. Refer to the examples
+      	in the file .../examples/xlwt_easyxf_simple_demo.py and to the xf_dict
+      	dictionary in Style.py. Various synonyms including color/colour, center/centre and gray/grey
+      	are allowed. Case is irrelevant (except maybe in font names). '-' may be used instead
+      	of '_'.<br />
+		Example: "font: bold on; align: wrap on, vert centre, horiz center"
+      </p>
+    </dd>
+    <dt><i>num_format_str</i></dt>
+    <dd>
+      <p>
+		To get the "number format string" of an existing cell whose format you want to reproduce,
+		select the cell and click on Format/Cells/Number/Custom. Otherwise, refer to Excel help.<br />
+		Examples: "#,##0.00", "dd/mm/yyyy"
+      </p>
+    </dd>
+    <dt>Returns:</dt>
+    <dd>
+      An object of the XFstyle class
+    </dd>
+  </dl>
+  <br />
+
+  </dd>
+
+  <dt><b>Workbook</b> (class)  [<a href='#xlwt.Workbook-class'>#</a>]</dt>
+  <dd>
+    <p>The class to instantiate to create a workbook</p>
+    <p>For more information about this class, see <a href='#xlwt.Workbook-class'><i>The Workbook Class</i></a>.</p>
+  </dd>
+  <dt><b>Worksheet</b> (class)  [<a href='#xlwt.Worksheet-class'>#</a>]</dt>
+  <dd>
+    <p>A class to represent the contents of a sheet in a workbook.</p>
+    <p>For more information about this class, see <a href='#xlwt.Worksheet-class'><i>The Worksheet Class</i></a>.</p>
+  </dd>
+</dl>
+
+<h2><a id='xlwt.Workbook-class' name='xlwt.Workbook-class'>The Workbook Class</a><em style="color:red;">[NC]</em></h2>
+<dl>
+<dt><b>Workbook(encoding='ascii',style_compression=0)</b> (class) [<a href='#xlwt.Workbook-class'>#</a>]</dt>
+<dd>
+  <p>
+  This is a class representing a workbook and all its contents.
+  When creating Excel files with xlwt, you will normally start by
+  instantiating an object of this class.
+  </p>
+  <dl>
+    <dt><i>encoding</i></dt>
+    <dd>
+      <em style="color:red;">[NC]</em>
+    </dd>
+    <dt><i>style_compression</i></dt>
+    <dd>
+      <em style="color:red;">[NC]</em>
+    </dd>
+    <dt>Returns:</dt>
+    <dd>
+      An object of the <a href="#xlwt.Workbook-class">Workbook</a> class
+    </dd>
+  </dl>
+  <br />
+</dd>
+<dt><a id='xlwt.Workbook.add_sheet-method' name='xlwt.Workbook.add_sheet-method'><b>add_sheet(sheetname)</b></a> [<a href='#xlwt.Workbook.add_sheet-method'>#</a>]</dt>
+<dd>
+  <p>
+  This method is used to create Worksheets in a Workbook.
+  </p>
+  <dl>
+    <dt><i>sheetname</i></dt>
+    <dd>
+      The name to use for this sheet, as it will appear in the tabs at
+      the bottom of the Excel application.
+    </dd>
+    <dt>Returns:</dt>
+    <dd>
+      An object of the <a href="#xlwt.Worksheet-class">Worksheet</a> class
+    </dd>
+  </dl>
+  <br />
+</dd>
+<dt><a id='xlwt.Workbook.save-method' name='xlwt.Workbook.save-method'><b>save(filename_or_stream)</b></a> [<a href='#xlwt.Workbook.save-method'>#</a>]</dt>
+<dd>
+  <p>
+  This method is used to save Workbook to a file in native Excel format.
+  </p>
+  <dl>
+    <dt><i>filename_or_stream</i></dt>
+    <dd>
+      <p>
+      This can be a string containing a filename of the file, in which case
+      the excel file is saved to disk using the name provided.
+      </p>
+      <p>
+      It can also be a stream object with a write method, such as a
+      StringIO, in which case the data for the excel file is written
+      to the stream.
+      </p>
+    </dd>
+  </dl>
+  <br />
+</dd>
+</dl>
+
+<h2><a id='xlwt.Worksheet-class' name='xlwt.Worksheet-class'>The Worksheet Class</a><em style="color:red;">[NC]</em></h2>
+<dl>
+<dt><b>Worksheet(sheetname, parent_book)</b> (class) [<a href='#xlwt.Worksheet-class'>#</a>]</dt>
+<dd>
+  <p>
+  This is a class representing the contents of a sheet in a workbook.
+  </p>
+  <p>
+   WARNING: You don't normally create instances of this class
+   yourself. They are returned from calls to <a href="#xlwt.Workbook.add_sheet-method">Workbook.add_sheet</a>
+  </p>
+</dd>
+<dt><a id='xlwt.Worksheet.write-method'
+name='xlwt.Worksheet.write-method'><b>write(r, c, label="", style=Style.default_style)</b></a> [<a href='#xlwt.Worksheet.write-method'>#</a>]</dt>
+<dd>
+  <p>
+  This method is used to write a cell to a Worksheet..
+  </p>
+  <dl>
+    <dt><i>r</i></dt>
+    <dd>
+      	The zero-relative number of the row in the worksheet to which the cell should be written.
+    </dd>
+    <dt><i>c</i></dt>
+    <dd>
+      	The zero-relative number of the column in the worksheet to which the cell should be written.
+    </dd>
+    <dt><i>label</i></dt>
+    <dd>
+    	The data value to be written.
+    	An int, long, or decimal.Decimal instance is converted to float.
+    	A unicode instance is written as is.
+    	A str instance is converted to unicode using the encoding (default: 'ascii') specified
+    	when the Workbook instance was created.
+    	A datetime.datetime, datetime.date, or datetime.time instance is converted into Excel date format
+    	(a float representing the number of days since (typically) 1899-12-31T00:00:00,
+    	under the pretence that 1900 was a leap year).
+    	A bool instance will show up as TRUE or FALSE in Excel.
+    	None causes the cell to be blank -- no data, only formatting.
+    	An xlwt.Formula instance causes an Excel formula to be written.
+    	<em style="color:red;">[NC]</em>
+    </dd>
+    <dt><i>style</i></dt>
+    <dd>
+    	A style -- also known as an XF (extended format) -- is an XFStyle object, which encapsulates
+    	the formatting applied to the cell and its contents. XFStyle objects are best set up using the
+    	<i>easyxf</i> function. They may also be set up by setting attributes in
+    	Alignment, Borders, Pattern, Font and Protection objects
+    	then setting those objects and a format string as attributes of an XFStyle object.
+    	<em style="color:red;">[NC]</em>
+    </dd>
+  </dl>
+  <br />
+</dd>
+</dl>
+
+</body></html>
diff --git a/tablib/packages/xlwt/examples/big-16Mb.py b/tablib/packages/xlwt/examples/big-16Mb.py
new file mode 100644
index 0000000..91db123
--- /dev/null
+++ b/tablib/packages/xlwt/examples/big-16Mb.py
@@ -0,0 +1,35 @@
+#!/usr/bin/env python
+# tries stress SST, SAT and MSAT
+
+from time import *
+from xlwt.Workbook import *
+from xlwt.Style import *
+
+style = XFStyle()
+
+wb = Workbook()
+ws0 = wb.add_sheet('0')
+
+colcount = 200 + 1
+rowcount = 6000 + 1
+
+t0 = time()
+print "\nstart: %s" % ctime(t0)
+
+print "Filling..."
+for col in xrange(colcount):
+    print "[%d]" % col, 
+    for row in xrange(rowcount):
+        #ws0.write(row, col, "BIG(%d, %d)" % (row, col))
+        ws0.write(row, col, "BIG")
+
+t1 = time() - t0
+print "\nsince starting elapsed %.2f s" % (t1)
+
+print "Storing..."
+wb.save('big-16Mb.xls')
+
+t2 = time() - t0
+print "since starting elapsed %.2f s" % (t2)
+
+
diff --git a/tablib/packages/xlwt/examples/big-35Mb.py b/tablib/packages/xlwt/examples/big-35Mb.py
new file mode 100644
index 0000000..74be5a7
--- /dev/null
+++ b/tablib/packages/xlwt/examples/big-35Mb.py
@@ -0,0 +1,34 @@
+#!/usr/bin/env python
+# tries stress SST, SAT and MSAT
+
+from time import *
+from xlwt import *
+
+style = XFStyle()
+
+wb = Workbook()
+ws0 = wb.add_sheet('0')
+
+colcount = 200 + 1
+rowcount = 6000 + 1
+
+t0 = time()
+print "\nstart: %s" % ctime(t0)
+
+print "Filling..."
+for col in xrange(colcount):
+    print "[%d]" % col, 
+    for row in xrange(rowcount):
+        ws0.write(row, col, "BIG(%d, %d)" % (row, col))
+        #ws0.write(row, col, "BIG")
+
+t1 = time() - t0
+print "\nsince starting elapsed %.2f s" % (t1)
+
+print "Storing..."
+wb.save('big-35Mb.xls')
+
+t2 = time() - t0
+print "since starting elapsed %.2f s" % (t2)
+
+
diff --git a/tablib/packages/xlwt/examples/blanks.py b/tablib/packages/xlwt/examples/blanks.py
new file mode 100644
index 0000000..056a3ec
--- /dev/null
+++ b/tablib/packages/xlwt/examples/blanks.py
@@ -0,0 +1,36 @@
+#!/usr/bin/env python
+# -*- coding: windows-1251 -*-
+# Copyright (C) 2005 Kiseliov Roman
+
+from xlwt import *
+
+font0 = Font()
+font0.name = 'Times New Roman'
+font0.struck_out = True
+font0.bold = True
+
+style0 = XFStyle()
+style0.font = font0
+
+
+wb = Workbook()
+ws0 = wb.add_sheet('0')
+
+ws0.write(1, 1, 'Test', style0)
+
+for i in range(0, 0x53):
+    borders = Borders()
+    borders.left = i
+    borders.right = i
+    borders.top = i
+    borders.bottom = i
+
+    style = XFStyle()
+    style.borders = borders
+
+    ws0.write(i, 2, '', style)
+    ws0.write(i, 3, hex(i), style0)
+
+ws0.write_merge(5, 8, 6, 10, "")
+
+wb.save('blanks.xls')
diff --git a/tablib/packages/xlwt/examples/col_width.py b/tablib/packages/xlwt/examples/col_width.py
new file mode 100644
index 0000000..6e6cb33
--- /dev/null
+++ b/tablib/packages/xlwt/examples/col_width.py
@@ -0,0 +1,19 @@
+#!/usr/bin/env python
+# -*- coding: windows-1251 -*-
+# Copyright (C) 2005 Kiseliov Roman
+__rev_id__ = """$Id: col_width.py 3315 2008-03-14 14:44:52Z chris $"""
+
+
+from xlwt import *
+
+w = Workbook()
+ws = w.add_sheet('Hey, Dude')
+
+for i in range(6, 80):
+    fnt = Font()
+    fnt.height = i*20
+    style = XFStyle()
+    style.font = fnt
+    ws.write(1, i, 'Test')
+    ws.col(i).width = 0x0d00 + i
+w.save('col_width.xls')
diff --git a/tablib/packages/xlwt/examples/country.py b/tablib/packages/xlwt/examples/country.py
new file mode 100644
index 0000000..cb26e29
--- /dev/null
+++ b/tablib/packages/xlwt/examples/country.py
@@ -0,0 +1,10 @@
+#!/usr/bin/env python
+# -*- coding: windows-1252 -*-
+# Copyright (C) 2007 John Machin
+
+from xlwt import *
+
+w = Workbook()
+w.country_code = 61
+ws = w.add_sheet('AU')
+w.save('country.xls')
diff --git a/tablib/packages/xlwt/examples/dates.py b/tablib/packages/xlwt/examples/dates.py
new file mode 100644
index 0000000..389b93b
--- /dev/null
+++ b/tablib/packages/xlwt/examples/dates.py
@@ -0,0 +1,37 @@
+#!/usr/bin/env python
+# -*- coding: windows-1251 -*-
+# Copyright (C) 2005 Kiseliov Roman
+
+from xlwt import *
+from datetime import datetime
+
+w = Workbook()
+ws = w.add_sheet('Hey, Dude')
+
+fmts = [
+    'M/D/YY',
+    'D-MMM-YY',
+    'D-MMM',
+    'MMM-YY',
+    'h:mm AM/PM',
+    'h:mm:ss AM/PM',
+    'h:mm',
+    'h:mm:ss',
+    'M/D/YY h:mm',
+    'mm:ss',
+    '[h]:mm:ss',
+    'mm:ss.0',
+]
+
+i = 0
+for fmt in fmts:
+    ws.write(i, 0, fmt)
+
+    style = XFStyle()
+    style.num_format_str = fmt
+
+    ws.write(i, 4, datetime.now(), style)
+
+    i += 1
+
+w.save('dates.xls')
diff --git a/tablib/packages/xlwt/examples/format.py b/tablib/packages/xlwt/examples/format.py
new file mode 100644
index 0000000..fd49e0a
--- /dev/null
+++ b/tablib/packages/xlwt/examples/format.py
@@ -0,0 +1,38 @@
+#!/usr/bin/env python
+# -*- coding: windows-1251 -*-
+# Copyright (C) 2005 Kiseliov Roman
+
+from xlwt import *
+
+font0 = Font()
+font0.name = 'Times New Roman'
+font0.struck_out = True
+font0.bold = True
+
+style0 = XFStyle()
+style0.font = font0
+
+
+wb = Workbook()
+ws0 = wb.add_sheet('0')
+
+ws0.write(1, 1, 'Test', style0)
+
+for i in range(0, 0x53):
+    fnt = Font()
+    fnt.name = 'Arial'
+    fnt.colour_index = i
+    fnt.outline = True
+
+    borders = Borders()
+    borders.left = i
+
+    style = XFStyle()
+    style.font = fnt
+    style.borders = borders
+
+    ws0.write(i, 2, 'colour', style)
+    ws0.write(i, 3, hex(i), style0)
+
+
+wb.save('format.xls')
diff --git a/tablib/packages/xlwt/examples/formula_names.py b/tablib/packages/xlwt/examples/formula_names.py
new file mode 100644
index 0000000..f0354bc
--- /dev/null
+++ b/tablib/packages/xlwt/examples/formula_names.py
@@ -0,0 +1,34 @@
+#!/usr/bin/env python
+# -*- coding: windows-1251 -*-
+# Copyright (C) 2005 Kiseliov Roman
+
+from xlwt import *
+from xlwt.ExcelFormulaParser import FormulaParseException
+
+w = Workbook()
+ws = w.add_sheet('F')
+
+## This example is a little silly since the formula building is
+## so simplistic that it often fails because the generated text
+## has the wrong number of parameters for the function being
+## tested.
+
+i = 0
+succeed_count = 0
+fail_count = 0
+for n in sorted(ExcelMagic.std_func_by_name):
+    ws.write(i, 0, n)
+    text = n + "($A$1)"
+    try:
+        formula = Formula(text)
+    except FormulaParseException,e:
+        print "Could not parse %r: %s" % (text,e.args[0])
+        fail_count += 1
+    else:
+        ws.write(i, 3, formula)
+        succeed_count += 1
+    i += 1
+
+w.save('formula_names.xls')
+
+print "succeeded with %i functions, failed with %i" % (succeed_count,fail_count)
diff --git a/tablib/packages/xlwt/examples/formulas.py b/tablib/packages/xlwt/examples/formulas.py
new file mode 100644
index 0000000..b89f5f5
--- /dev/null
+++ b/tablib/packages/xlwt/examples/formulas.py
@@ -0,0 +1,47 @@
+#!/usr/bin/env python
+# -*- coding: windows-1251 -*-
+# Copyright (C) 2005 Kiseliov Roman
+
+from xlwt import *
+
+w = Workbook()
+ws = w.add_sheet('F')
+
+ws.write(0, 0, Formula("-(1+1)"))
+ws.write(1, 0, Formula("-(1+1)/(-2-2)"))
+ws.write(2, 0, Formula("-(134.8780789+1)"))
+ws.write(3, 0, Formula("-(134.8780789e-10+1)"))
+ws.write(4, 0, Formula("-1/(1+1)+9344"))
+
+ws.write(0, 1, Formula("-(1+1)"))
+ws.write(1, 1, Formula("-(1+1)/(-2-2)"))
+ws.write(2, 1, Formula("-(134.8780789+1)"))
+ws.write(3, 1, Formula("-(134.8780789e-10+1)"))
+ws.write(4, 1, Formula("-1/(1+1)+9344"))
+
+ws.write(0, 2, Formula("A1*B1"))
+ws.write(1, 2, Formula("A2*B2"))
+ws.write(2, 2, Formula("A3*B3"))
+ws.write(3, 2, Formula("A4*B4*sin(pi()/4)"))
+ws.write(4, 2, Formula("A5%*B5*pi()/1000"))
+
+##############
+## NOTE: parameters are separated by semicolon!!!
+##############
+
+
+ws.write(5, 2, Formula("C1+C2+C3+C4+C5/(C1+C2+C3+C4/(C1+C2+C3+C4/(C1+C2+C3+C4)+C5)+C5)-20.3e-2"))
+ws.write(5, 3, Formula("C1^2"))
+ws.write(6, 2, Formula("SUM(C1;C2;;;;;C3;;;C4)"))
+ws.write(6, 3, Formula("SUM($A$1:$C$5)"))
+
+ws.write(7, 0, Formula('"lkjljllkllkl"'))
+ws.write(7, 1, Formula('"yuyiyiyiyi"'))
+ws.write(7, 2, Formula('A8 & B8 & A8'))
+ws.write(8, 2, Formula('now()'))
+
+ws.write(10, 2, Formula('TRUE'))
+ws.write(11, 2, Formula('FALSE'))
+ws.write(12, 3, Formula('IF(A1>A2;3;"hkjhjkhk")'))
+
+w.save('formulas.xls')
diff --git a/tablib/packages/xlwt/examples/hyperlinks.py b/tablib/packages/xlwt/examples/hyperlinks.py
new file mode 100644
index 0000000..8de611b
--- /dev/null
+++ b/tablib/packages/xlwt/examples/hyperlinks.py
@@ -0,0 +1,28 @@
+#!/usr/bin/env python
+# -*- coding: windows-1251 -*-
+# Copyright (C) 2005 Kiseliov Roman
+
+from xlwt import *
+
+f = Font()
+f.height = 20*72
+f.name = 'Verdana'
+f.bold = True
+f.underline = Font.UNDERLINE_DOUBLE
+f.colour_index = 4
+
+h_style = XFStyle()
+h_style.font = f
+
+w = Workbook()
+ws = w.add_sheet('F')
+
+##############
+## NOTE: parameters are separated by semicolon!!!
+##############
+
+n = "HYPERLINK"
+ws.write_merge(1, 1, 1, 10, Formula(n + '("http://www.irs.gov/pub/irs-pdf/f1000.pdf";"f1000.pdf")'), h_style)
+ws.write_merge(2, 2, 2, 25, Formula(n + '("mailto:roman.kiseliov@gmail.com?subject=pyExcelerator-feedback&Body=Hello,%20Roman!";"pyExcelerator-feedback")'), h_style)
+
+w.save("hyperlinks.xls")
diff --git a/tablib/packages/xlwt/examples/image.py b/tablib/packages/xlwt/examples/image.py
new file mode 100644
index 0000000..f926b8d
--- /dev/null
+++ b/tablib/packages/xlwt/examples/image.py
@@ -0,0 +1,12 @@
+#!/usr/bin/env python
+# -*- coding: windows-1251 -*-
+# Copyright (C) 2005 Kiseliov Roman
+
+from xlwt import *
+
+w = Workbook()
+ws = w.add_sheet('Image')
+ws.insert_bitmap('python.bmp', 2, 2)
+ws.insert_bitmap('python.bmp', 10, 2)
+
+w.save('image.xls')
diff --git a/tablib/packages/xlwt/examples/merged.py b/tablib/packages/xlwt/examples/merged.py
new file mode 100644
index 0000000..f7f9c57
--- /dev/null
+++ b/tablib/packages/xlwt/examples/merged.py
@@ -0,0 +1,39 @@
+#!/usr/bin/env python
+# -*- coding: windows-1251 -*-
+# Copyright (C) 2005 Kiseliov Roman
+
+from xlwt import *
+
+fnt = Font()
+fnt.name = 'Arial'
+fnt.colour_index = 4
+fnt.bold = True
+
+borders = Borders()
+borders.left = 6
+borders.right = 6
+borders.top = 6
+borders.bottom = 6
+
+al = Alignment()
+al.horz = Alignment.HORZ_CENTER
+al.vert = Alignment.VERT_CENTER
+
+style = XFStyle()
+style.font = fnt
+style.borders = borders
+style.alignment = al
+
+
+wb = Workbook()
+ws0 = wb.add_sheet('sheet0')
+ws1 = wb.add_sheet('sheet1')
+ws2 = wb.add_sheet('sheet2')
+
+for i in range(0, 0x200, 2):
+    ws0.write_merge(i, i+1, 1, 5, 'test %d' % i, style)
+    ws1.write_merge(i, i, 1, 7, 'test %d' % i, style)
+    ws2.write_merge(i, i+1, 1, 7 + (i%10), 'test %d' % i, style)
+
+
+wb.save('merged.xls')
diff --git a/tablib/packages/xlwt/examples/merged0.py b/tablib/packages/xlwt/examples/merged0.py
new file mode 100644
index 0000000..93496c6
--- /dev/null
+++ b/tablib/packages/xlwt/examples/merged0.py
@@ -0,0 +1,30 @@
+#!/usr/bin/env python
+# -*- coding: windows-1251 -*-
+# Copyright (C) 2005 Kiseliov Roman
+
+from xlwt import *
+
+wb = Workbook()
+ws0 = wb.add_sheet('sheet0')
+
+
+fnt = Font()
+fnt.name = 'Arial'
+fnt.colour_index = 4
+fnt.bold = True
+
+borders = Borders()
+borders.left = 6
+borders.right = 6
+borders.top = 6
+borders.bottom = 6
+
+style = XFStyle()
+style.font = fnt
+style.borders = borders
+
+ws0.write_merge(3, 3, 1, 5, 'test1', style)
+ws0.write_merge(4, 10, 1, 5, 'test2', style)
+ws0.col(1).width = 0x0d00
+
+wb.save('merged0.xls')
diff --git a/tablib/packages/xlwt/examples/merged1.py b/tablib/packages/xlwt/examples/merged1.py
new file mode 100644
index 0000000..813530b
--- /dev/null
+++ b/tablib/packages/xlwt/examples/merged1.py
@@ -0,0 +1,102 @@
+#!/usr/bin/env python
+# -*- coding: windows-1251 -*-
+# Copyright (C) 2005 Kiseliov Roman
+
+from xlwt import *
+
+wb = Workbook()
+ws0 = wb.add_sheet('sheet0')
+
+fnt1 = Font()
+fnt1.name = 'Verdana'
+fnt1.bold = True
+fnt1.height = 18*0x14
+
+pat1 = Pattern()
+pat1.pattern = Pattern.SOLID_PATTERN
+pat1.pattern_fore_colour = 0x16
+
+brd1 = Borders()
+brd1.left = 0x06
+brd1.right = 0x06
+brd1.top = 0x06
+brd1.bottom = 0x06
+
+fnt2 = Font()
+fnt2.name = 'Verdana'
+fnt2.bold = True
+fnt2.height = 14*0x14
+
+brd2 = Borders()
+brd2.left = 0x01
+brd2.right = 0x01
+brd2.top = 0x01
+brd2.bottom = 0x01
+
+pat2 = Pattern()
+pat2.pattern = Pattern.SOLID_PATTERN
+pat2.pattern_fore_colour = 0x01F
+
+fnt3 = Font()
+fnt3.name = 'Verdana'
+fnt3.bold = True
+fnt3.italic = True
+fnt3.height = 12*0x14
+
+brd3 = Borders()
+brd3.left = 0x07
+brd3.right = 0x07
+brd3.top = 0x07
+brd3.bottom = 0x07
+
+fnt4 = Font()
+
+al1 = Alignment()
+al1.horz = Alignment.HORZ_CENTER
+al1.vert = Alignment.VERT_CENTER
+
+al2 = Alignment()
+al2.horz = Alignment.HORZ_RIGHT
+al2.vert = Alignment.VERT_CENTER
+
+al3 = Alignment()
+al3.horz = Alignment.HORZ_LEFT
+al3.vert = Alignment.VERT_CENTER
+
+style1 = XFStyle()
+style1.font = fnt1
+style1.alignment = al1
+style1.pattern = pat1
+style1.borders = brd1
+
+style2 = XFStyle()
+style2.font = fnt2
+style2.alignment = al1
+style2.pattern = pat2
+style2.borders = brd2
+
+style3 = XFStyle()
+style3.font = fnt3
+style3.alignment = al1
+style3.pattern = pat2
+style3.borders = brd3
+
+price_style = XFStyle()
+price_style.font = fnt4
+price_style.alignment = al2
+price_style.borders = brd3
+price_style.num_format_str = '_(#,##0.00_) "money"'
+
+ware_style = XFStyle()
+ware_style.font = fnt4
+ware_style.alignment = al3
+ware_style.borders = brd3
+
+
+ws0.merge(3, 3, 1, 5, style1)
+ws0.merge(4, 10, 1, 6, style2)
+ws0.merge(14, 16, 1, 7, style3)
+ws0.col(1).width = 0x0d00
+
+
+wb.save('merged1.xls')
diff --git a/tablib/packages/xlwt/examples/mini.py b/tablib/packages/xlwt/examples/mini.py
new file mode 100644
index 0000000..61bb30c
--- /dev/null
+++ b/tablib/packages/xlwt/examples/mini.py
@@ -0,0 +1,9 @@
+#!/usr/bin/env python
+# -*- coding: windows-1251 -*-
+# Copyright (C) 2005 Kiseliov Roman
+
+from xlwt import *
+
+w = Workbook()
+ws = w.add_sheet('xlwt was here')
+w.save('mini.xls')
diff --git a/tablib/packages/xlwt/examples/num_formats.py b/tablib/packages/xlwt/examples/num_formats.py
new file mode 100644
index 0000000..3a56f6c
--- /dev/null
+++ b/tablib/packages/xlwt/examples/num_formats.py
@@ -0,0 +1,60 @@
+#!/usr/bin/env python
+# -*- coding: windows-1251 -*-
+# Copyright (C) 2005 Kiseliov Roman
+
+from xlwt import *
+
+w = Workbook()
+ws = w.add_sheet('Hey, Dude')
+
+fmts = [
+    'general',
+    '0',
+    '0.00',
+    '#,##0',
+    '#,##0.00',
+    '"$"#,##0_);("$"#,##',
+    '"$"#,##0_);[Red]("$"#,##',
+    '"$"#,##0.00_);("$"#,##',
+    '"$"#,##0.00_);[Red]("$"#,##',
+    '0%',
+    '0.00%',
+    '0.00E+00',
+    '# ?/?',
+    '# ??/??',
+    'M/D/YY',
+    'D-MMM-YY',
+    'D-MMM',
+    'MMM-YY',
+    'h:mm AM/PM',
+    'h:mm:ss AM/PM',
+    'h:mm',
+    'h:mm:ss',
+    'M/D/YY h:mm',
+    '_(#,##0_);(#,##0)',
+    '_(#,##0_);[Red](#,##0)',
+    '_(#,##0.00_);(#,##0.00)',
+    '_(#,##0.00_);[Red](#,##0.00)',
+    '_("$"* #,##0_);_("$"* (#,##0);_("$"* "-"_);_(@_)',
+    '_(* #,##0_);_(* (#,##0);_(* "-"_);_(@_)',
+    '_("$"* #,##0.00_);_("$"* (#,##0.00);_("$"* "-"??_);_(@_)',
+    '_(* #,##0.00_);_(* (#,##0.00);_(* "-"??_);_(@_)',
+    'mm:ss',
+    '[h]:mm:ss',
+    'mm:ss.0',
+    '##0.0E+0',
+    '@'   
+]
+
+i = 0
+for fmt in fmts:
+    ws.write(i, 0, fmt)
+
+    style = XFStyle()
+    style.num_format_str = fmt
+
+    ws.write(i, 4, -1278.9078, style)
+
+    i += 1
+
+w.save('num_formats.xls')
diff --git a/tablib/packages/xlwt/examples/numbers.py b/tablib/packages/xlwt/examples/numbers.py
new file mode 100644
index 0000000..524d9fc
--- /dev/null
+++ b/tablib/packages/xlwt/examples/numbers.py
@@ -0,0 +1,25 @@
+#!/usr/bin/env python
+# -*- coding: windows-1251 -*-
+# Copyright (C) 2005 Kiseliov Roman
+
+from xlwt import *
+
+w = Workbook()
+ws = w.add_sheet('Hey, Dude')
+
+ws.write(0, 0, 1)
+ws.write(1, 0, 1.23)
+ws.write(2, 0, 12345678)
+ws.write(3, 0, 123456.78)
+
+ws.write(0, 1, -1)
+ws.write(1, 1, -1.23)
+ws.write(2, 1, -12345678)
+ws.write(3, 1, -123456.78)
+
+ws.write(0, 2, -17867868678687.0)
+ws.write(1, 2, -1.23e-5)
+ws.write(2, 2, -12345678.90780980)
+ws.write(3, 2, -123456.78)
+
+w.save('numbers.xls')
diff --git a/tablib/packages/xlwt/examples/outline.py b/tablib/packages/xlwt/examples/outline.py
new file mode 100644
index 0000000..45b8df9
--- /dev/null
+++ b/tablib/packages/xlwt/examples/outline.py
@@ -0,0 +1,113 @@
+#!/usr/bin/env python
+# -*- coding: windows-1251 -*-
+# Copyright (C) 2005 Kiseliov Roman
+
+from xlwt import *
+
+fnt = Font()
+fnt.name = 'Arial'
+fnt.colour_index = 4
+fnt.bold = True
+
+borders = Borders()
+borders.left = 6
+borders.right = 6
+borders.top = 6
+borders.bottom = 6
+
+style = XFStyle()
+style.font = fnt
+style.borders = borders
+
+wb = Workbook()
+
+ws0 = wb.add_sheet('Rows Outline')
+
+ws0.write_merge(1, 1, 1, 5, 'test 1', style)
+ws0.write_merge(2, 2, 1, 4, 'test 1', style)
+ws0.write_merge(3, 3, 1, 3, 'test 2', style)
+ws0.write_merge(4, 4, 1, 4, 'test 1', style)
+ws0.write_merge(5, 5, 1, 4, 'test 3', style)
+ws0.write_merge(6, 6, 1, 5, 'test 1', style)
+ws0.write_merge(7, 7, 1, 5, 'test 4', style)
+ws0.write_merge(8, 8, 1, 4, 'test 1', style)
+ws0.write_merge(9, 9, 1, 3, 'test 5', style)
+
+ws0.row(1).level = 1
+ws0.row(2).level = 1
+ws0.row(3).level = 2
+ws0.row(4).level = 2
+ws0.row(5).level = 2
+ws0.row(6).level = 2
+ws0.row(7).level = 2
+ws0.row(8).level = 1
+ws0.row(9).level = 1
+
+
+ws1 = wb.add_sheet('Columns Outline')
+
+ws1.write_merge(1, 1, 1, 5, 'test 1', style)
+ws1.write_merge(2, 2, 1, 4, 'test 1', style)
+ws1.write_merge(3, 3, 1, 3, 'test 2', style)
+ws1.write_merge(4, 4, 1, 4, 'test 1', style)
+ws1.write_merge(5, 5, 1, 4, 'test 3', style)
+ws1.write_merge(6, 6, 1, 5, 'test 1', style)
+ws1.write_merge(7, 7, 1, 5, 'test 4', style)
+ws1.write_merge(8, 8, 1, 4, 'test 1', style)
+ws1.write_merge(9, 9, 1, 3, 'test 5', style)
+
+ws1.col(1).level = 1
+ws1.col(2).level = 1
+ws1.col(3).level = 2
+ws1.col(4).level = 2
+ws1.col(5).level = 2
+ws1.col(6).level = 2
+ws1.col(7).level = 2
+ws1.col(8).level = 1
+ws1.col(9).level = 1
+
+
+ws2 = wb.add_sheet('Rows and Columns Outline')
+
+ws2.write_merge(1, 1, 1, 5, 'test 1', style)
+ws2.write_merge(2, 2, 1, 4, 'test 1', style)
+ws2.write_merge(3, 3, 1, 3, 'test 2', style)
+ws2.write_merge(4, 4, 1, 4, 'test 1', style)
+ws2.write_merge(5, 5, 1, 4, 'test 3', style)
+ws2.write_merge(6, 6, 1, 5, 'test 1', style)
+ws2.write_merge(7, 7, 1, 5, 'test 4', style)
+ws2.write_merge(8, 8, 1, 4, 'test 1', style)
+ws2.write_merge(9, 9, 1, 3, 'test 5', style)
+
+ws2.row(1).level = 1
+ws2.row(2).level = 1
+ws2.row(3).level = 2
+ws2.row(4).level = 2
+ws2.row(5).level = 2
+ws2.row(6).level = 2
+ws2.row(7).level = 2
+ws2.row(8).level = 1
+ws2.row(9).level = 1
+
+ws2.write_merge(1, 1, 1, 5, 'test 1', style)
+ws2.write_merge(2, 2, 1, 4, 'test 1', style)
+ws2.write_merge(3, 3, 1, 3, 'test 2', style)
+ws2.write_merge(4, 4, 1, 4, 'test 1', style)
+ws2.write_merge(5, 5, 1, 4, 'test 3', style)
+ws2.write_merge(6, 6, 1, 5, 'test 1', style)
+ws2.write_merge(7, 7, 1, 5, 'test 4', style)
+ws2.write_merge(8, 8, 1, 4, 'test 1', style)
+ws2.write_merge(9, 9, 1, 3, 'test 5', style)
+
+ws2.col(1).level = 1
+ws2.col(2).level = 1
+ws2.col(3).level = 2
+ws2.col(4).level = 2
+ws2.col(5).level = 2
+ws2.col(6).level = 2
+ws2.col(7).level = 2
+ws2.col(8).level = 1
+ws2.col(9).level = 1
+
+
+wb.save('outline.xls')
diff --git a/tablib/packages/xlwt/examples/panes.py b/tablib/packages/xlwt/examples/panes.py
new file mode 100644
index 0000000..9fd83b0
--- /dev/null
+++ b/tablib/packages/xlwt/examples/panes.py
@@ -0,0 +1,58 @@
+#!/usr/bin/env python
+# -*- coding: windows-1251 -*-
+# Copyright (C) 2005 Kiseliov Roman
+
+from xlwt import *
+
+w = Workbook()
+ws1 = w.add_sheet('sheet 1')
+ws2 = w.add_sheet('sheet 2')
+ws3 = w.add_sheet('sheet 3')
+ws4 = w.add_sheet('sheet 4')
+ws5 = w.add_sheet('sheet 5')
+ws6 = w.add_sheet('sheet 6')
+
+for i in range(0x100):
+    ws1.write(i/0x10, i%0x10, i)
+
+for i in range(0x100):
+    ws2.write(i/0x10, i%0x10, i)
+
+for i in range(0x100):
+    ws3.write(i/0x10, i%0x10, i)
+
+for i in range(0x100):
+    ws4.write(i/0x10, i%0x10, i)
+
+for i in range(0x100):
+    ws5.write(i/0x10, i%0x10, i)
+
+for i in range(0x100):
+    ws6.write(i/0x10, i%0x10, i)
+
+ws1.panes_frozen = True
+ws1.horz_split_pos = 2
+
+ws2.panes_frozen = True
+ws2.vert_split_pos = 2
+
+ws3.panes_frozen = True
+ws3.horz_split_pos = 1
+ws3.vert_split_pos = 1
+
+ws4.panes_frozen = False
+ws4.horz_split_pos = 12
+ws4.horz_split_first_visible = 2
+
+ws5.panes_frozen = False
+ws5.vert_split_pos = 40
+ws4.vert_split_first_visible = 2
+
+ws6.panes_frozen = False
+ws6.horz_split_pos = 12
+ws4.horz_split_first_visible = 2
+ws6.vert_split_pos = 40
+ws4.vert_split_first_visible = 2
+
+w.save('panes.xls')
+
diff --git a/tablib/packages/xlwt/examples/parse-fmla.py b/tablib/packages/xlwt/examples/parse-fmla.py
new file mode 100644
index 0000000..06f68eb
--- /dev/null
+++ b/tablib/packages/xlwt/examples/parse-fmla.py
@@ -0,0 +1,12 @@
+from xlwt import ExcelFormulaParser, ExcelFormula
+import sys
+
+f = ExcelFormula.Formula(
+""" -((1.80 + 2.898 * 1)/(1.80 + 2.898))*
+AVERAGE((1.80 + 2.898 * 1)/(1.80 + 2.898); 
+        (1.80 + 2.898 * 1)/(1.80 + 2.898); 
+        (1.80 + 2.898 * 1)/(1.80 + 2.898)) + 
+SIN(PI()/4)""")
+
+#for t in f.rpn():
+#    print "%15s %15s" % (ExcelFormulaParser.PtgNames[t[0]], t[1])
diff --git a/tablib/packages/xlwt/examples/protection.py b/tablib/packages/xlwt/examples/protection.py
new file mode 100644
index 0000000..db54cb0
--- /dev/null
+++ b/tablib/packages/xlwt/examples/protection.py
@@ -0,0 +1,122 @@
+# Copyright (C) 2005 Kiseliov Roman
+
+from xlwt import *
+
+fnt = Font()
+fnt.name = 'Arial'
+fnt.colour_index = 4
+fnt.bold = True
+
+borders = Borders()
+borders.left = 6
+borders.right = 6
+borders.top = 6
+borders.bottom = 6
+
+style = XFStyle()
+style.font = fnt
+style.borders = borders
+
+wb = Workbook()
+
+ws0 = wb.add_sheet('Rows Outline')
+
+ws0.write_merge(1, 1, 1, 5, 'test 1', style)
+ws0.write_merge(2, 2, 1, 4, 'test 1', style)
+ws0.write_merge(3, 3, 1, 3, 'test 2', style)
+ws0.write_merge(4, 4, 1, 4, 'test 1', style)
+ws0.write_merge(5, 5, 1, 4, 'test 3', style)
+ws0.write_merge(6, 6, 1, 5, 'test 1', style)
+ws0.write_merge(7, 7, 1, 5, 'test 4', style)
+ws0.write_merge(8, 8, 1, 4, 'test 1', style)
+ws0.write_merge(9, 9, 1, 3, 'test 5', style)
+
+ws0.row(1).level = 1
+ws0.row(2).level = 1
+ws0.row(3).level = 2
+ws0.row(4).level = 2
+ws0.row(5).level = 2
+ws0.row(6).level = 2
+ws0.row(7).level = 2
+ws0.row(8).level = 1
+ws0.row(9).level = 1
+
+
+ws1 = wb.add_sheet('Columns Outline')
+
+ws1.write_merge(1, 1, 1, 5, 'test 1', style)
+ws1.write_merge(2, 2, 1, 4, 'test 1', style)
+ws1.write_merge(3, 3, 1, 3, 'test 2', style)
+ws1.write_merge(4, 4, 1, 4, 'test 1', style)
+ws1.write_merge(5, 5, 1, 4, 'test 3', style)
+ws1.write_merge(6, 6, 1, 5, 'test 1', style)
+ws1.write_merge(7, 7, 1, 5, 'test 4', style)
+ws1.write_merge(8, 8, 1, 4, 'test 1', style)
+ws1.write_merge(9, 9, 1, 3, 'test 5', style)
+
+ws1.col(1).level = 1
+ws1.col(2).level = 1
+ws1.col(3).level = 2
+ws1.col(4).level = 2
+ws1.col(5).level = 2
+ws1.col(6).level = 2
+ws1.col(7).level = 2
+ws1.col(8).level = 1
+ws1.col(9).level = 1
+
+
+ws2 = wb.add_sheet('Rows and Columns Outline')
+
+ws2.write_merge(1, 1, 1, 5, 'test 1', style)
+ws2.write_merge(2, 2, 1, 4, 'test 1', style)
+ws2.write_merge(3, 3, 1, 3, 'test 2', style)
+ws2.write_merge(4, 4, 1, 4, 'test 1', style)
+ws2.write_merge(5, 5, 1, 4, 'test 3', style)
+ws2.write_merge(6, 6, 1, 5, 'test 1', style)
+ws2.write_merge(7, 7, 1, 5, 'test 4', style)
+ws2.write_merge(8, 8, 1, 4, 'test 1', style)
+ws2.write_merge(9, 9, 1, 3, 'test 5', style)
+
+ws2.row(1).level = 1
+ws2.row(2).level = 1
+ws2.row(3).level = 2
+ws2.row(4).level = 2
+ws2.row(5).level = 2
+ws2.row(6).level = 2
+ws2.row(7).level = 2
+ws2.row(8).level = 1
+ws2.row(9).level = 1
+
+ws2.col(1).level = 1
+ws2.col(2).level = 1
+ws2.col(3).level = 2
+ws2.col(4).level = 2
+ws2.col(5).level = 2
+ws2.col(6).level = 2
+ws2.col(7).level = 2
+ws2.col(8).level = 1
+ws2.col(9).level = 1
+
+
+ws0.protect = True
+ws0.wnd_protect = True
+ws0.obj_protect = True
+ws0.scen_protect = True
+ws0.password = "123456"
+
+ws1.protect = True
+ws1.wnd_protect = True
+ws1.obj_protect = True
+ws1.scen_protect = True
+ws1.password = "abcdefghij"
+
+ws2.protect = True
+ws2.wnd_protect = True
+ws2.obj_protect = True
+ws2.scen_protect = True
+ws2.password = "ok"
+
+wb.protect = True
+wb.wnd_protect = True
+wb.obj_protect = True
+wb.save('protection.xls')
diff --git a/tablib/packages/xlwt/examples/python.bmp b/tablib/packages/xlwt/examples/python.bmp
new file mode 100644
index 0000000..bd1ba3f
--- /dev/null
+++ b/tablib/packages/xlwt/examples/python.bmp
diff --git a/tablib/packages/xlwt/examples/row_styles.py b/tablib/packages/xlwt/examples/row_styles.py
new file mode 100644
index 0000000..dd6d494
--- /dev/null
+++ b/tablib/packages/xlwt/examples/row_styles.py
@@ -0,0 +1,17 @@
+#!/usr/bin/env python
+# -*- coding: windows-1251 -*-
+# Copyright (C) 2005 Kiseliov Roman
+
+from xlwt import *
+
+w = Workbook()
+ws = w.add_sheet('Hey, Dude')
+
+for i in range(6, 80):
+    fnt = Font()
+    fnt.height = i*20
+    style = XFStyle()
+    style.font = fnt
+    ws.write(i, 1, 'Test')
+    ws.row(i).set_style(style)
+w.save('row_styles.xls')
diff --git a/tablib/packages/xlwt/examples/row_styles_empty.py b/tablib/packages/xlwt/examples/row_styles_empty.py
new file mode 100644
index 0000000..cf6a65c
--- /dev/null
+++ b/tablib/packages/xlwt/examples/row_styles_empty.py
@@ -0,0 +1,18 @@
+#!/usr/bin/env python
+# -*- coding: windows-1251 -*-
+# Copyright (C) 2005 Kiseliov Roman
+__rev_id__ = """$Id: row_styles_empty.py 3309 2008-03-14 11:04:30Z chris $"""
+
+
+from pyExcelerator import *
+
+w = Workbook()
+ws = w.add_sheet('Hey, Dude')
+
+for i in range(6, 80):
+    fnt = Font()
+    fnt.height = i*20
+    style = XFStyle()
+    style.font = fnt
+    ws.row(i).set_style(style)
+w.save('row_styles_empty.xls')
diff --git a/tablib/packages/xlwt/examples/simple.py b/tablib/packages/xlwt/examples/simple.py
new file mode 100644
index 0000000..44f7622
--- /dev/null
+++ b/tablib/packages/xlwt/examples/simple.py
@@ -0,0 +1,24 @@
+import xlwt
+from datetime import datetime
+
+font0 = xlwt.Font()
+font0.name = 'Times New Roman'
+font0.colour_index = 2
+font0.bold = True
+
+style0 = xlwt.XFStyle()
+style0.font = font0
+
+style1 = xlwt.XFStyle()
+style1.num_format_str = 'D-MMM-YY'
+
+wb = xlwt.Workbook()
+ws = wb.add_sheet('A Test Sheet')
+
+ws.write(0, 0, 'Test', style0)
+ws.write(1, 0, datetime.now(), style1)
+ws.write(2, 0, 1)
+ws.write(2, 1, 1)
+ws.write(2, 2, xlwt.Formula("A3+B3"))
+
+wb.save('example.xls')
diff --git a/tablib/packages/xlwt/examples/sst.py b/tablib/packages/xlwt/examples/sst.py
new file mode 100644
index 0000000..b91c2f5
--- /dev/null
+++ b/tablib/packages/xlwt/examples/sst.py
@@ -0,0 +1,52 @@
+#!/usr/bin/env python
+# -*- coding: windows-1251 -*-
+# Copyright (C) 2005 Kiseliov Roman
+
+from xlwt import *
+
+font0 = Formatting.Font()
+font0.name = 'Arial'
+font1 = Formatting.Font()
+font1.name = 'Arial Cyr'
+font2 = Formatting.Font()
+font2.name = 'Times New Roman'
+font3 = Formatting.Font()
+font3.name = 'Courier New Cyr'
+
+num_format0 = '0.00000'
+num_format1 = '0.000000'
+num_format2 = '0.0000000'
+num_format3 = '0.00000000'
+
+st0 = XFStyle()
+st1 = XFStyle()
+st2 = XFStyle()
+st3 = XFStyle()
+st4 = XFStyle()
+
+st0.font = font0
+st0.num_format = num_format0
+
+st1.font = font1
+st1.num_format = num_format1
+
+st2.font = font2
+st2.num_format = num_format2
+
+st3.font = font3
+st3.num_format = num_format3
+
+wb = Workbook()
+
+wb.add_style(st0)
+wb.add_style(st1)
+wb.add_style(st2)
+wb.add_style(st3)
+
+ws0 = wb.add_sheet('0')
+ws0.write(0, 0, 'Olya'*0x4000, st0)
+
+#for i in range(0, 0x10):
+#    ws0.write(i, 2, ('%d'%i)*0x4000, st1)
+    
+wb.save('sst.xls')
diff --git a/tablib/packages/xlwt/examples/unicode0.py b/tablib/packages/xlwt/examples/unicode0.py
new file mode 100644
index 0000000..3651ec9
--- /dev/null
+++ b/tablib/packages/xlwt/examples/unicode0.py
@@ -0,0 +1,12 @@
+#!/usr/bin/env python
+import xlwt
+
+# Strings passed to (for example) Worksheet.write can be unicode objects,
+# or str (8-bit) objects, which are then decoded into unicode.
+# The encoding to be used defaults to 'ascii'. This can be overridden
+# when the Workbook instance is created:
+
+book = xlwt.Workbook(encoding='cp1251')
+sheet = book.add_sheet('cp1251-demo')
+sheet.write(0, 0, '\xce\xeb\xff')
+book.save('unicode0.xls')
diff --git a/tablib/packages/xlwt/examples/unicode1.py b/tablib/packages/xlwt/examples/unicode1.py
new file mode 100644
index 0000000..90e99cc
--- /dev/null
+++ b/tablib/packages/xlwt/examples/unicode1.py
@@ -0,0 +1,28 @@
+#!/usr/bin/env python
+# -*- coding: windows-1251 -*-
+# Copyright (C) 2005 Kiseliov Roman
+
+from xlwt import *
+
+w = Workbook()
+ws1 = w.add_sheet(u'\N{GREEK SMALL LETTER ALPHA}\N{GREEK SMALL LETTER BETA}\N{GREEK SMALL LETTER GAMMA}')
+
+ws1.write(0, 0, u'\N{GREEK SMALL LETTER ALPHA}\N{GREEK SMALL LETTER BETA}\N{GREEK SMALL LETTER GAMMA}')
+ws1.write(1, 1, u'\N{GREEK SMALL LETTER DELTA}x = 1 + \N{GREEK SMALL LETTER DELTA}')
+
+ws1.write(2,0, u'A\u2262\u0391.')     # RFC2152 example
+ws1.write(3,0, u'Hi Mom -\u263a-!')   # RFC2152 example
+ws1.write(4,0, u'\u65E5\u672C\u8A9E') # RFC2152 example
+ws1.write(5,0, u'Item 3 is \u00a31.') # RFC2152 example
+ws1.write(8,0, u'\N{INTEGRAL}')       # RFC2152 example
+
+w.add_sheet(u'A\u2262\u0391.')     # RFC2152 example
+w.add_sheet(u'Hi Mom -\u263a-!')   # RFC2152 example
+one_more_ws = w.add_sheet(u'\u65E5\u672C\u8A9E') # RFC2152 example
+w.add_sheet(u'Item 3 is \u00a31.') # RFC2152 example
+
+one_more_ws.write(0, 0, u'\u2665\u2665')
+
+w.add_sheet(u'\N{GREEK SMALL LETTER ETA WITH TONOS}')
+w.save('unicode1.xls')
+
diff --git a/tablib/packages/xlwt/examples/unicode2.py b/tablib/packages/xlwt/examples/unicode2.py
new file mode 100644
index 0000000..18904b0
--- /dev/null
+++ b/tablib/packages/xlwt/examples/unicode2.py
@@ -0,0 +1,19 @@
+#!/usr/bin/env python
+# -*- coding: windows-1251 -*-
+# Copyright (C) 2005 Kiseliov Roman
+
+from xlwt import *
+
+w = Workbook()
+ws1 = w.add_sheet(u'\N{GREEK SMALL LETTER ALPHA}\N{GREEK SMALL LETTER BETA}\N{GREEK SMALL LETTER GAMMA}\u2665\u041e\u041b\u042f\u2665')
+
+fnt = Font()
+fnt.height = 26*20
+style = XFStyle()
+style.font = fnt
+
+for i in range(0x10000):
+    ws1.write(i/0x10, i%0x10, unichr(i), style)
+
+w.save('unicode2.xls')
+
diff --git a/tablib/packages/xlwt/examples/wsprops.py b/tablib/packages/xlwt/examples/wsprops.py
new file mode 100644
index 0000000..adc5a04
--- /dev/null
+++ b/tablib/packages/xlwt/examples/wsprops.py
@@ -0,0 +1,155 @@
+props = \
+[
+        'name',
+        'parent',
+        'rows',
+        'cols',
+        'merged_ranges',
+        'bmp_rec',
+        'show_formulas',
+        'show_grid',
+        'show_headers',
+        'panes_frozen',
+        'show_empty_as_zero',
+        'auto_colour_grid',
+        'cols_right_to_left',
+        'show_outline',
+        'remove_splits',
+        'selected',
+        'hidden',
+        'page_preview',
+        'first_visible_row',
+        'first_visible_col',
+        'grid_colour',
+        'preview_magn',
+        'normal_magn',
+        'row_gut_width',
+        'col_gut_height',
+        'show_auto_page_breaks',
+        'dialogue_sheet',
+        'auto_style_outline',
+        'outline_below',
+        'outline_right',
+        'fit_num_pages',
+        'show_row_outline',
+        'show_col_outline',
+        'alt_expr_eval',
+        'alt_formula_entries',
+        'row_default_height',
+        'col_default_width',
+        'calc_mode',
+        'calc_count',
+        'RC_ref_mode',
+        'iterations_on',
+        'delta',
+        'save_recalc',
+        'print_headers',
+        'print_grid',
+        'grid_set',
+        'vert_page_breaks',
+        'horz_page_breaks',
+        'header_str',
+        'footer_str',
+        'print_centered_vert',
+        'print_centered_horz',
+        'left_margin',
+        'right_margin',
+        'top_margin',
+        'bottom_margin',
+        'paper_size_code',
+        'print_scaling',
+        'start_page_number',
+        'fit_width_to_pages',
+        'fit_height_to_pages',
+        'print_in_rows',
+        'portrait',
+        'print_not_colour',
+        'print_draft',
+        'print_notes',
+        'print_notes_at_end',
+        'print_omit_errors',
+        'print_hres',
+        'print_vres',
+        'header_margin',
+        'footer_margin',
+        'copies_num',
+]
+
+from xlwt import *
+
+wb = Workbook()
+ws = wb.add_sheet('sheet')
+
+print ws.name
+print ws.parent
+print ws.rows
+print ws.cols
+print ws.merged_ranges
+print ws.bmp_rec
+print ws.show_formulas
+print ws.show_grid
+print ws.show_headers
+print ws.panes_frozen
+print ws.show_empty_as_zero
+print ws.auto_colour_grid
+print ws.cols_right_to_left
+print ws.show_outline
+print ws.remove_splits
+print ws.selected
+# print ws.hidden
+print ws.page_preview
+print ws.first_visible_row
+print ws.first_visible_col
+print ws.grid_colour
+print ws.preview_magn
+print ws.normal_magn
+#print ws.row_gut_width
+#print ws.col_gut_height
+print ws.show_auto_page_breaks
+print ws.dialogue_sheet
+print ws.auto_style_outline
+print ws.outline_below
+print ws.outline_right
+print ws.fit_num_pages
+print ws.show_row_outline
+print ws.show_col_outline
+print ws.alt_expr_eval
+print ws.alt_formula_entries
+print ws.row_default_height
+print ws.col_default_width
+print ws.calc_mode
+print ws.calc_count
+print ws.RC_ref_mode
+print ws.iterations_on
+print ws.delta
+print ws.save_recalc
+print ws.print_headers
+print ws.print_grid
+#print ws.grid_set
+print ws.vert_page_breaks
+print ws.horz_page_breaks
+print ws.header_str
+print ws.footer_str
+print ws.print_centered_vert
+print ws.print_centered_horz
+print ws.left_margin
+print ws.right_margin
+print ws.top_margin
+print ws.bottom_margin
+print ws.paper_size_code
+print ws.print_scaling
+print ws.start_page_number
+print ws.fit_width_to_pages
+print ws.fit_height_to_pages
+print ws.print_in_rows
+print ws.portrait
+print ws.print_colour
+print ws.print_draft
+print ws.print_notes
+print ws.print_notes_at_end
+print ws.print_omit_errors
+print ws.print_hres
+print ws.print_vres
+print ws.header_margin
+print ws.footer_margin
+print ws.copies_num
diff --git a/tablib/packages/xlwt/examples/xlwt_easyxf_simple_demo.py b/tablib/packages/xlwt/examples/xlwt_easyxf_simple_demo.py
new file mode 100644
index 0000000..2afa69f
--- /dev/null
+++ b/tablib/packages/xlwt/examples/xlwt_easyxf_simple_demo.py
@@ -0,0 +1,46 @@
+
+# Write an XLS file with a single worksheet, containing
+# a heading row and some rows of data.
+
+import xlwt
+import datetime
+ezxf = xlwt.easyxf
+
+def write_xls(file_name, sheet_name, headings, data, heading_xf, data_xfs):
+    book = xlwt.Workbook()
+    sheet = book.add_sheet(sheet_name)
+    rowx = 0
+    for colx, value in enumerate(headings):
+        sheet.write(rowx, colx, value, heading_xf)
+    sheet.set_panes_frozen(True) # frozen headings instead of split panes
+    sheet.set_horz_split_pos(rowx+1) # in general, freeze after last heading row
+    sheet.set_remove_splits(True) # if user does unfreeze, don't leave a split there
+    for row in data:
+        rowx += 1
+        for colx, value in enumerate(row):
+            sheet.write(rowx, colx, value, data_xfs[colx])
+    book.save(file_name)
+
+if __name__ == '__main__':
+    import sys
+    mkd = datetime.date
+    hdngs = ['Date', 'Stock Code', 'Quantity', 'Unit Price', 'Value', 'Message']
+    kinds =  'date    text          int         price         money    text'.split()
+    data = [
+        [mkd(2007, 7, 1), 'ABC', 1000, 1.234567, 1234.57, ''],
+        [mkd(2007, 12, 31), 'XYZ', -100, 4.654321, -465.43, 'Goods returned'],
+        ] + [
+            [mkd(2008, 6, 30), 'PQRCD', 100, 2.345678, 234.57, ''],
+        ] * 100
+
+    heading_xf = ezxf('font: bold on; align: wrap on, vert centre, horiz center')
+    kind_to_xf_map = {
+        'date': ezxf(num_format_str='yyyy-mm-dd'),
+        'int': ezxf(num_format_str='#,##0'),
+        'money': ezxf('font: italic on; pattern: pattern solid, fore-colour grey25',
+            num_format_str='$#,##0.00'),
+        'price': ezxf(num_format_str='#0.000000'),
+        'text': ezxf(),
+        }
+    data_xfs = [kind_to_xf_map[k] for k in kinds]
+    write_xls('xlwt_easyxf_simple_demo.xls', 'Demo', hdngs, data, heading_xf, data_xfs)
diff --git a/tablib/packages/xlwt/excel-formula.g b/tablib/packages/xlwt/excel-formula.g
new file mode 100644
index 0000000..d98d9b9
--- /dev/null
+++ b/tablib/packages/xlwt/excel-formula.g
@@ -0,0 +1,374 @@
+header {
+    import struct
+    import Utils
+    from UnicodeUtils import upack1
+    from ExcelMagic import *
+
+    _RVAdelta =     {"R": 0, "V": 0x20, "A": 0x40}
+    _RVAdeltaRef =  {"R": 0, "V": 0x20, "A": 0x40, "D": 0x20}
+    _RVAdeltaArea = {"R": 0, "V": 0x20, "A": 0x40, "D": 0}
+
+    
+    class FormulaParseException(Exception):
+        """
+        An exception indicating that a Formula could not be successfully parsed.
+        """
+}
+
+header "ExcelFormulaParser.__init__" {
+    self.rpn = ""
+    self.sheet_references = []
+    self.xcall_references = []
+}
+
+options {
+    language  = "Python";
+}
+
+class ExcelFormulaParser extends Parser;
+options {
+    k = 2;
+    defaultErrorHandler = false;
+    buildAST = false;
+}
+
+
+tokens {
+    TRUE_CONST;
+    FALSE_CONST;
+    STR_CONST;
+    NUM_CONST;
+    INT_CONST;
+
+    FUNC_IF;
+    FUNC_CHOOSE;
+    NAME;
+    QUOTENAME;
+
+    EQ;
+    NE;
+    GT;
+    LT;
+    GE;
+    LE;
+
+    ADD;
+    SUB;
+    MUL;
+    DIV;
+
+    POWER;
+    PERCENT;
+
+    LP;
+    RP;
+
+    LB;
+    RB;
+
+    COLON;
+    COMMA;
+    SEMICOLON;
+    REF2D;
+    REF2D_R1C1;
+    BANG;
+}
+
+formula
+    : expr["V"]
+    ;
+
+expr[arg_type]
+    : // {print "\n**expr %s" % arg_type}
+    prec0_expr[arg_type]
+        (
+            (
+                  EQ { op = struct.pack('B', ptgEQ) }
+                | NE { op = struct.pack('B', ptgNE) }
+                | GT { op = struct.pack('B', ptgGT) }
+                | LT { op = struct.pack('B', ptgLT) }
+                | GE { op = struct.pack('B', ptgGE) }
+                | LE { op = struct.pack('B', ptgLE) }
+            )
+            prec0_expr[arg_type] { self.rpn += op }
+        )*
+    ;
+
+prec0_expr[arg_type]
+    : prec1_expr[arg_type]
+        (
+            (
+                CONCAT { op = struct.pack('B', ptgConcat) }
+            )
+            prec1_expr[arg_type] { self.rpn += op }
+        )*
+    ;
+
+prec1_expr[arg_type]
+    : // {print "**prec1_expr1 %s" % arg_type}
+    prec2_expr[arg_type]
+    // {print "**prec1_expr2 %s" % arg_type}
+        (
+            (
+                  ADD { op = struct.pack('B', ptgAdd) }
+                | SUB { op = struct.pack('B', ptgSub) }
+            )
+            // {print "**prec1_expr3 %s" % arg_type}
+            prec2_expr[arg_type]
+            { self.rpn += op;
+            // print "**prec1_expr4 %s" % arg_type
+            }
+        )*
+    ;
+
+
+prec2_expr[arg_type]
+    : prec3_expr[arg_type]
+        (
+            (
+                  MUL { op = struct.pack('B', ptgMul) }
+                | DIV { op = struct.pack('B', ptgDiv) }
+            )
+            prec3_expr[arg_type] { self.rpn += op }
+        )*
+    ;
+
+prec3_expr[arg_type]
+    : prec4_expr[arg_type]
+        (
+            (
+                POWER { op = struct.pack('B', ptgPower) }
+            )
+            prec4_expr[arg_type] { self.rpn += op }
+        )*
+    ;
+
+prec4_expr[arg_type]
+    : prec5_expr[arg_type]
+        (
+            PERCENT { self.rpn += struct.pack('B', ptgPercent) }
+        )?
+    ;
+
+prec5_expr[arg_type]
+    : primary[arg_type]
+    | SUB primary[arg_type] { self.rpn += struct.pack('B', ptgUminus) }
+    ;
+
+primary[arg_type]
+    : TRUE_CONST
+        {
+            self.rpn += struct.pack("2B", ptgBool, 1)
+        }
+    | FALSE_CONST
+        {
+            self.rpn += struct.pack("2B", ptgBool, 0)
+        }
+    | str_tok:STR_CONST
+        {
+            self.rpn += struct.pack("B", ptgStr) + upack1(str_tok.text[1:-1].replace("\"\"", "\""))
+        }
+    | int_tok:INT_CONST
+        {
+            // print "**int_const", int_tok.text
+            int_value = int(int_tok.text)
+            if int_value <= 65535:
+                self.rpn += struct.pack("<BH", ptgInt, int_value)
+            else:
+                self.rpn += struct.pack("<Bd", ptgNum, float(int_value))
+        }
+    | num_tok:NUM_CONST
+        {
+            self.rpn += struct.pack("<Bd", ptgNum, float(num_tok.text))
+        }
+    | ref2d_tok:REF2D
+        {
+            // print "**ref2d %s %s" % (ref2d_tok.text, arg_type)
+            r, c = Utils.cell_to_packed_rowcol(ref2d_tok.text)
+            ptg = ptgRefR + _RVAdeltaRef[arg_type]
+            self.rpn += struct.pack("<B2H", ptg, r, c)
+        }
+    | ref2d1_tok:REF2D COLON ref2d2_tok:REF2D
+        {
+            r1, c1 = Utils.cell_to_packed_rowcol(ref2d1_tok.text)
+            r2, c2 = Utils.cell_to_packed_rowcol(ref2d2_tok.text)
+            ptg = ptgAreaR + _RVAdeltaArea[arg_type]
+            self.rpn += struct.pack("<B4H", ptg, r1, r2, c1, c2)
+        }
+    | sheet1 = sheet
+        { 
+            sheet2 = sheet1
+        }
+        ( COLON sheet2 = sheet )? BANG ref3d_ref2d: REF2D
+        {
+            ptg = ptgRef3dR + _RVAdeltaRef[arg_type]
+            rpn_ref2d = ""
+            r1, c1 = Utils.cell_to_packed_rowcol(ref3d_ref2d.text)
+            rpn_ref2d = struct.pack("<3H", 0x0000, r1, c1)
+        }
+        ( COLON ref3d_ref2d2: REF2D
+            {
+                ptg = ptgArea3dR + _RVAdeltaArea[arg_type]
+                r2, c2 = Utils.cell_to_packed_rowcol(ref3d_ref2d2.text)
+                rpn_ref2d = struct.pack("<5H", 0x0000, r1, r2, c1, c2)
+            }
+        )?
+        {
+            self.rpn += struct.pack("<B", ptg)
+            self.sheet_references.append((sheet1, sheet2, len(self.rpn)))
+            self.rpn += rpn_ref2d
+        }
+    | FUNC_IF
+        LP expr["V"] (SEMICOLON | COMMA)
+        {
+            self.rpn += struct.pack("<BBH", ptgAttr, 0x02, 0) // tAttrIf
+            pos0 = len(self.rpn) - 2
+        }
+        expr[arg_type] (SEMICOLON | COMMA)
+        {
+            self.rpn += struct.pack("<BBH", ptgAttr, 0x08, 0) // tAttrSkip
+            pos1 = len(self.rpn) - 2
+            self.rpn = self.rpn[:pos0] + struct.pack("<H", pos1-pos0) + self.rpn[pos0+2:]
+        }
+        expr[arg_type] RP
+        {
+            self.rpn += struct.pack("<BBH", ptgAttr, 0x08, 3) // tAttrSkip
+            self.rpn += struct.pack("<BBH", ptgFuncVarR, 3, 1) // 3 = nargs, 1 = IF func
+            pos2 = len(self.rpn)
+            self.rpn = self.rpn[:pos1] + struct.pack("<H", pos2-(pos1+2)-1) + self.rpn[pos1+2:]
+        }
+    | FUNC_CHOOSE
+        {
+            arg_type = "R"
+            rpn_chunks = []
+        }
+        LP expr["V"] // first argument (the selector)
+        {
+            rpn_start = len(self.rpn)
+            ref_markers = [len(self.sheet_references)]
+        }
+        (
+            (SEMICOLON | COMMA)
+                { mark = len(self.rpn) }
+                (
+                  expr[arg_type]
+                | { self.rpn += struct.pack("B", ptgMissArg) }
+                )
+                {
+                    rpn_chunks.append(self.rpn[mark:])
+                    ref_markers.append(len(self.sheet_references))
+                }
+        )*
+        RP
+        {
+            self.rpn = self.rpn[:rpn_start]
+            nc = len(rpn_chunks)
+            chunklens = [len(chunk) for chunk in rpn_chunks]
+            skiplens = [0] * nc
+            skiplens[-1] = 3
+            for ic in xrange(nc-1, 0, -1):
+                skiplens[ic-1] = skiplens[ic] + chunklens[ic] + 4
+            jump_pos = [2 * nc + 2]
+            for ic in xrange(nc):
+                jump_pos.append(jump_pos[-1] + chunklens[ic] + 4)
+            chunk_shift = 2 * nc + 6 // size of tAttrChoose
+            for ic in xrange(nc):
+                for refx in xrange(ref_markers[ic], ref_markers[ic+1]):
+                    ref = self.sheet_references[refx]
+                    self.sheet_references[refx] = (ref[0], ref[1], ref[2] + chunk_shift)
+                chunk_shift += 4 // size of tAttrSkip
+            choose_rpn = []
+            choose_rpn.append(struct.pack("<BBH", ptgAttr, 0x04, nc)) // 0x04 is tAttrChoose
+            choose_rpn.append(struct.pack("<%dH" % (nc+1), *jump_pos))
+            for ic in xrange(nc):
+                choose_rpn.append(rpn_chunks[ic])
+                choose_rpn.append(struct.pack("<BBH", ptgAttr, 0x08, skiplens[ic])) // 0x08 is tAttrSkip
+            choose_rpn.append(struct.pack("<BBH", ptgFuncVarV, nc+1, 100)) // 100 is CHOOSE fn
+            self.rpn += "".join(choose_rpn)
+        }
+    | name_tok:NAME
+        {
+            raise Exception("[formula] found unexpected NAME token (%r)" % name_tok.txt)
+            // #### TODO: handle references to defined names here
+        }
+    | func_tok:NAME
+        {
+            func_toku = func_tok.text.upper()
+            if func_toku in all_funcs_by_name:
+                (opcode,
+                min_argc,
+                max_argc,
+                func_type,
+                arg_type_str) = all_funcs_by_name[func_toku]
+                arg_type_list = list(arg_type_str)
+            else:
+                raise Exception("[formula] unknown function (%s)" % func_tok.text)
+            // print "**func_tok1 %s %s" % (func_toku, func_type)
+            xcall = opcode < 0
+            if xcall:
+                // The name of the add-in function is passed as the 1st arg
+                // of the hidden XCALL function
+                self.xcall_references.append((func_toku, len(self.rpn) + 1))
+                self.rpn += struct.pack("<BHHH",
+                    ptgNameXR,
+                    0xadde, // ##PATCHME## index to REF entry in EXTERNSHEET record
+                    0xefbe, // ##PATCHME## one-based index to EXTERNNAME record
+                    0x0000) // unused
+        }
+        LP arg_count = expr_list[arg_type_list, min_argc, max_argc] RP
+        {
+            if arg_count > max_argc or arg_count < min_argc:
+                raise Exception, "%d parameters for function: %s" % (arg_count, func_tok.text)
+            if xcall:
+                func_ptg = ptgFuncVarR + _RVAdelta[func_type]
+                self.rpn += struct.pack("<2BH", func_ptg, arg_count + 1, 255) // 255 is magic XCALL function
+            elif min_argc == max_argc:
+                func_ptg = ptgFuncR + _RVAdelta[func_type]
+                self.rpn += struct.pack("<BH", func_ptg, opcode)
+            elif arg_count == 1 and func_tok.text.upper() == "SUM":
+                self.rpn += struct.pack("<BBH", ptgAttr, 0x10, 0) // tAttrSum
+            else:
+                func_ptg = ptgFuncVarR + _RVAdelta[func_type]
+                self.rpn += struct.pack("<2BH", func_ptg, arg_count, opcode)
+        }
+    | LP expr[arg_type] RP
+        {
+            self.rpn += struct.pack("B", ptgParen)
+        }
+    ;
+
+expr_list[arg_type_list, min_argc, max_argc] returns [arg_cnt]
+    {
+        arg_cnt = 0
+        arg_type = arg_type_list[arg_cnt]
+        // print "**expr_list1[%d] req=%s" % (arg_cnt, arg_type)
+    }
+    : expr[arg_type] { arg_cnt += 1 }
+    (
+        {
+            if arg_cnt < len(arg_type_list):
+                arg_type = arg_type_list[arg_cnt]
+            else:
+                arg_type = arg_type_list[-1]
+            if arg_type == "+":
+                arg_type = arg_type_list[-2]
+            // print "**expr_list2[%d] req=%s" % (arg_cnt, arg_type)
+        }
+        (SEMICOLON | COMMA)
+            (
+                  expr[arg_type]
+                | { self.rpn += struct.pack("B", ptgMissArg) }
+            )
+            { arg_cnt += 1 }
+    )*
+    |
+    ;
+
+sheet returns[ref]
+    : sheet_ref_name: NAME
+    	{ ref = sheet_ref_name.text }
+    | sheet_ref_int: INT_CONST
+    	{ ref = sheet_ref_int.text }
+    | sheet_ref_quote: QUOTENAME
+    	{ ref = sheet_ref_quote.text[1:-1].replace("''", "'") }
+    ;
diff --git a/tablib/packages/yaml/__init__.py b/tablib/packages/yaml/__init__.py
new file mode 100644
index 0000000..c0fd1f3
--- /dev/null
+++ b/tablib/packages/yaml/__init__.py
@@ -0,0 +1,288 @@
+
+from error import *
+
+from tokens import *
+from events import *
+from nodes import *
+
+from loader import *
+from dumper import *
+
+__version__ = '3.09'
+
+try:
+    from cyaml import *
+    __with_libyaml__ = True
+except ImportError:
+    __with_libyaml__ = False
+
+def scan(stream, Loader=Loader):
+    """
+    Scan a YAML stream and produce scanning tokens.
+    """
+    loader = Loader(stream)
+    while loader.check_token():
+        yield loader.get_token()
+
+def parse(stream, Loader=Loader):
+    """
+    Parse a YAML stream and produce parsing events.
+    """
+    loader = Loader(stream)
+    while loader.check_event():
+        yield loader.get_event()
+
+def compose(stream, Loader=Loader):
+    """
+    Parse the first YAML document in a stream
+    and produce the corresponding representation tree.
+    """
+    loader = Loader(stream)
+    return loader.get_single_node()
+
+def compose_all(stream, Loader=Loader):
+    """
+    Parse all YAML documents in a stream
+    and produce corresponding representation trees.
+    """
+    loader = Loader(stream)
+    while loader.check_node():
+        yield loader.get_node()
+
+def load(stream, Loader=Loader):
+    """
+    Parse the first YAML document in a stream
+    and produce the corresponding Python object.
+    """
+    loader = Loader(stream)
+    return loader.get_single_data()
+
+def load_all(stream, Loader=Loader):
+    """
+    Parse all YAML documents in a stream
+    and produce corresponding Python objects.
+    """
+    loader = Loader(stream)
+    while loader.check_data():
+        yield loader.get_data()
+
+def safe_load(stream):
+    """
+    Parse the first YAML document in a stream
+    and produce the corresponding Python object.
+    Resolve only basic YAML tags.
+    """
+    return load(stream, SafeLoader)
+
+def safe_load_all(stream):
+    """
+    Parse all YAML documents in a stream
+    and produce corresponding Python objects.
+    Resolve only basic YAML tags.
+    """
+    return load_all(stream, SafeLoader)
+
+def emit(events, stream=None, Dumper=Dumper,
+        canonical=None, indent=None, width=None,
+        allow_unicode=None, line_break=None):
+    """
+    Emit YAML parsing events into a stream.
+    If stream is None, return the produced string instead.
+    """
+    getvalue = None
+    if stream is None:
+        from StringIO import StringIO
+        stream = StringIO()
+        getvalue = stream.getvalue
+    dumper = Dumper(stream, canonical=canonical, indent=indent, width=width,
+            allow_unicode=allow_unicode, line_break=line_break)
+    for event in events:
+        dumper.emit(event)
+    if getvalue:
+        return getvalue()
+
+def serialize_all(nodes, stream=None, Dumper=Dumper,
+        canonical=None, indent=None, width=None,
+        allow_unicode=None, line_break=None,
+        encoding='utf-8', explicit_start=None, explicit_end=None,
+        version=None, tags=None):
+    """
+    Serialize a sequence of representation trees into a YAML stream.
+    If stream is None, return the produced string instead.
+    """
+    getvalue = None
+    if stream is None:
+        if encoding is None:
+            from StringIO import StringIO
+        else:
+            from cStringIO import StringIO
+        stream = StringIO()
+        getvalue = stream.getvalue
+    dumper = Dumper(stream, canonical=canonical, indent=indent, width=width,
+            allow_unicode=allow_unicode, line_break=line_break,
+            encoding=encoding, version=version, tags=tags,
+            explicit_start=explicit_start, explicit_end=explicit_end)
+    dumper.open()
+    for node in nodes:
+        dumper.serialize(node)
+    dumper.close()
+    if getvalue:
+        return getvalue()
+
+def serialize(node, stream=None, Dumper=Dumper, **kwds):
+    """
+    Serialize a representation tree into a YAML stream.
+    If stream is None, return the produced string instead.
+    """
+    return serialize_all([node], stream, Dumper=Dumper, **kwds)
+
+def dump_all(documents, stream=None, Dumper=Dumper,
+        default_style=None, default_flow_style=None,
+        canonical=None, indent=None, width=None,
+        allow_unicode=None, line_break=None,
+        encoding='utf-8', explicit_start=None, explicit_end=None,
+        version=None, tags=None):
+    """
+    Serialize a sequence of Python objects into a YAML stream.
+    If stream is None, return the produced string instead.
+    """
+    getvalue = None
+    if stream is None:
+        if encoding is None:
+            from StringIO import StringIO
+        else:
+            from cStringIO import StringIO
+        stream = StringIO()
+        getvalue = stream.getvalue
+    dumper = Dumper(stream, default_style=default_style,
+            default_flow_style=default_flow_style,
+            canonical=canonical, indent=indent, width=width,
+            allow_unicode=allow_unicode, line_break=line_break,
+            encoding=encoding, version=version, tags=tags,
+            explicit_start=explicit_start, explicit_end=explicit_end)
+    dumper.open()
+    for data in documents:
+        dumper.represent(data)
+    dumper.close()
+    if getvalue:
+        return getvalue()
+
+def dump(data, stream=None, Dumper=Dumper, **kwds):
+    """
+    Serialize a Python object into a YAML stream.
+    If stream is None, return the produced string instead.
+    """
+    return dump_all([data], stream, Dumper=Dumper, **kwds)
+
+def safe_dump_all(documents, stream=None, **kwds):
+    """
+    Serialize a sequence of Python objects into a YAML stream.
+    Produce only basic YAML tags.
+    If stream is None, return the produced string instead.
+    """
+    return dump_all(documents, stream, Dumper=SafeDumper, **kwds)
+
+def safe_dump(data, stream=None, **kwds):
+    """
+    Serialize a Python object into a YAML stream.
+    Produce only basic YAML tags.
+    If stream is None, return the produced string instead.
+    """
+    return dump_all([data], stream, Dumper=SafeDumper, **kwds)
+
+def add_implicit_resolver(tag, regexp, first=None,
+        Loader=Loader, Dumper=Dumper):
+    """
+    Add an implicit scalar detector.
+    If an implicit scalar value matches the given regexp,
+    the corresponding tag is assigned to the scalar.
+    first is a sequence of possible initial characters or None.
+    """
+    Loader.add_implicit_resolver(tag, regexp, first)
+    Dumper.add_implicit_resolver(tag, regexp, first)
+
+def add_path_resolver(tag, path, kind=None, Loader=Loader, Dumper=Dumper):
+    """
+    Add a path based resolver for the given tag.
+    A path is a list of keys that forms a path
+    to a node in the representation tree.
+    Keys can be string values, integers, or None.
+    """
+    Loader.add_path_resolver(tag, path, kind)
+    Dumper.add_path_resolver(tag, path, kind)
+
+def add_constructor(tag, constructor, Loader=Loader):
+    """
+    Add a constructor for the given tag.
+    Constructor is a function that accepts a Loader instance
+    and a node object and produces the corresponding Python object.
+    """
+    Loader.add_constructor(tag, constructor)
+
+def add_multi_constructor(tag_prefix, multi_constructor, Loader=Loader):
+    """
+    Add a multi-constructor for the given tag prefix.
+    Multi-constructor is called for a node if its tag starts with tag_prefix.
+    Multi-constructor accepts a Loader instance, a tag suffix,
+    and a node object and produces the corresponding Python object.
+    """
+    Loader.add_multi_constructor(tag_prefix, multi_constructor)
+
+def add_representer(data_type, representer, Dumper=Dumper):
+    """
+    Add a representer for the given type.
+    Representer is a function accepting a Dumper instance
+    and an instance of the given data type
+    and producing the corresponding representation node.
+    """
+    Dumper.add_representer(data_type, representer)
+
+def add_multi_representer(data_type, multi_representer, Dumper=Dumper):
+    """
+    Add a representer for the given type.
+    Multi-representer is a function accepting a Dumper instance
+    and an instance of the given data type or subtype
+    and producing the corresponding representation node.
+    """
+    Dumper.add_multi_representer(data_type, multi_representer)
+
+class YAMLObjectMetaclass(type):
+    """
+    The metaclass for YAMLObject.
+    """
+    def __init__(cls, name, bases, kwds):
+        super(YAMLObjectMetaclass, cls).__init__(name, bases, kwds)
+        if 'yaml_tag' in kwds and kwds['yaml_tag'] is not None:
+            cls.yaml_loader.add_constructor(cls.yaml_tag, cls.from_yaml)
+            cls.yaml_dumper.add_representer(cls, cls.to_yaml)
+
+class YAMLObject(object):
+    """
+    An object that can dump itself to a YAML stream
+    and load itself from a YAML stream.
+    """
+
+    __metaclass__ = YAMLObjectMetaclass
+    __slots__ = ()  # no direct instantiation, so allow immutable subclasses
+
+    yaml_loader = Loader
+    yaml_dumper = Dumper
+
+    yaml_tag = None
+    yaml_flow_style = None
+
+    def from_yaml(cls, loader, node):
+        """
+        Convert a representation node to a Python object.
+        """
+        return loader.construct_yaml_object(node, cls)
+    from_yaml = classmethod(from_yaml)
+
+    def to_yaml(cls, dumper, data):
+        """
+        Convert a Python object to a representation node.
+        """
+        return dumper.represent_yaml_object(cls.yaml_tag, data, cls,
+                flow_style=cls.yaml_flow_style)
+    to_yaml = classmethod(to_yaml)
+
diff --git a/tablib/packages/yaml/composer.py b/tablib/packages/yaml/composer.py
new file mode 100644
index 0000000..06e5ac7
--- /dev/null
+++ b/tablib/packages/yaml/composer.py
@@ -0,0 +1,139 @@
+
+__all__ = ['Composer', 'ComposerError']
+
+from error import MarkedYAMLError
+from events import *
+from nodes import *
+
+class ComposerError(MarkedYAMLError):
+    pass
+
+class Composer(object):
+
+    def __init__(self):
+        self.anchors = {}
+
+    def check_node(self):
+        # Drop the STREAM-START event.
+        if self.check_event(StreamStartEvent):
+            self.get_event()
+
+        # If there are more documents available?
+        return not self.check_event(StreamEndEvent)
+
+    def get_node(self):
+        # Get the root node of the next document.
+        if not self.check_event(StreamEndEvent):
+            return self.compose_document()
+
+    def get_single_node(self):
+        # Drop the STREAM-START event.
+        self.get_event()
+
+        # Compose a document if the stream is not empty.
+        document = None
+        if not self.check_event(StreamEndEvent):
+            document = self.compose_document()
+
+        # Ensure that the stream contains no more documents.
+        if not self.check_event(StreamEndEvent):
+            event = self.get_event()
+            raise ComposerError("expected a single document in the stream",
+                    document.start_mark, "but found another document",
+                    event.start_mark)
+
+        # Drop the STREAM-END event.
+        self.get_event()
+
+        return document
+
+    def compose_document(self):
+        # Drop the DOCUMENT-START event.
+        self.get_event()
+
+        # Compose the root node.
+        node = self.compose_node(None, None)
+
+        # Drop the DOCUMENT-END event.
+        self.get_event()
+
+        self.anchors = {}
+        return node
+
+    def compose_node(self, parent, index):
+        if self.check_event(AliasEvent):
+            event = self.get_event()
+            anchor = event.anchor
+            if anchor not in self.anchors:
+                raise ComposerError(None, None, "found undefined alias %r"
+                        % anchor.encode('utf-8'), event.start_mark)
+            return self.anchors[anchor]
+        event = self.peek_event()
+        anchor = event.anchor
+        if anchor is not None:
+            if anchor in self.anchors:
+                raise ComposerError("found duplicate anchor %r; first occurence"
+                        % anchor.encode('utf-8'), self.anchors[anchor].start_mark,
+                        "second occurence", event.start_mark)
+        self.descend_resolver(parent, index)
+        if self.check_event(ScalarEvent):
+            node = self.compose_scalar_node(anchor)
+        elif self.check_event(SequenceStartEvent):
+            node = self.compose_sequence_node(anchor)
+        elif self.check_event(MappingStartEvent):
+            node = self.compose_mapping_node(anchor)
+        self.ascend_resolver()
+        return node
+
+    def compose_scalar_node(self, anchor):
+        event = self.get_event()
+        tag = event.tag
+        if tag is None or tag == u'!':
+            tag = self.resolve(ScalarNode, event.value, event.implicit)
+        node = ScalarNode(tag, event.value,
+                event.start_mark, event.end_mark, style=event.style)
+        if anchor is not None:
+            self.anchors[anchor] = node
+        return node
+
+    def compose_sequence_node(self, anchor):
+        start_event = self.get_event()
+        tag = start_event.tag
+        if tag is None or tag == u'!':
+            tag = self.resolve(SequenceNode, None, start_event.implicit)
+        node = SequenceNode(tag, [],
+                start_event.start_mark, None,
+                flow_style=start_event.flow_style)
+        if anchor is not None:
+            self.anchors[anchor] = node
+        index = 0
+        while not self.check_event(SequenceEndEvent):
+            node.value.append(self.compose_node(node, index))
+            index += 1
+        end_event = self.get_event()
+        node.end_mark = end_event.end_mark
+        return node
+
+    def compose_mapping_node(self, anchor):
+        start_event = self.get_event()
+        tag = start_event.tag
+        if tag is None or tag == u'!':
+            tag = self.resolve(MappingNode, None, start_event.implicit)
+        node = MappingNode(tag, [],
+                start_event.start_mark, None,
+                flow_style=start_event.flow_style)
+        if anchor is not None:
+            self.anchors[anchor] = node
+        while not self.check_event(MappingEndEvent):
+            #key_event = self.peek_event()
+            item_key = self.compose_node(node, None)
+            #if item_key in node.value:
+            #    raise ComposerError("while composing a mapping", start_event.start_mark,
+            #            "found duplicate key", key_event.start_mark)
+            item_value = self.compose_node(node, item_key)
+            #node.value[item_key] = item_value
+            node.value.append((item_key, item_value))
+        end_event = self.get_event()
+        node.end_mark = end_event.end_mark
+        return node
+
diff --git a/tablib/packages/yaml/constructor.py b/tablib/packages/yaml/constructor.py
new file mode 100644
index 0000000..420c434
--- /dev/null
+++ b/tablib/packages/yaml/constructor.py
@@ -0,0 +1,684 @@
+
+__all__ = ['BaseConstructor', 'SafeConstructor', 'Constructor',
+    'ConstructorError']
+
+from error import *
+from nodes import *
+
+import datetime
+
+try:
+    set
+except NameError:
+    from sets import Set as set
+
+import binascii, re, sys, types
+
+class ConstructorError(MarkedYAMLError):
+    pass
+
+class BaseConstructor(object):
+
+    yaml_constructors = {}
+    yaml_multi_constructors = {}
+
+    def __init__(self):
+        self.constructed_objects = {}
+        self.recursive_objects = {}
+        self.state_generators = []
+        self.deep_construct = False
+
+    def check_data(self):
+        # If there are more documents available?
+        return self.check_node()
+
+    def get_data(self):
+        # Construct and return the next document.
+        if self.check_node():
+            return self.construct_document(self.get_node())
+
+    def get_single_data(self):
+        # Ensure that the stream contains a single document and construct it.
+        node = self.get_single_node()
+        if node is not None:
+            return self.construct_document(node)
+        return None
+
+    def construct_document(self, node):
+        data = self.construct_object(node)
+        while self.state_generators:
+            state_generators = self.state_generators
+            self.state_generators = []
+            for generator in state_generators:
+                for dummy in generator:
+                    pass
+        self.constructed_objects = {}
+        self.recursive_objects = {}
+        self.deep_construct = False
+        return data
+
+    def construct_object(self, node, deep=False):
+        if deep:
+            old_deep = self.deep_construct
+            self.deep_construct = True
+        if node in self.constructed_objects:
+            return self.constructed_objects[node]
+        if node in self.recursive_objects:
+            raise ConstructorError(None, None,
+                    "found unconstructable recursive node", node.start_mark)
+        self.recursive_objects[node] = None
+        constructor = None
+        tag_suffix = None
+        if node.tag in self.yaml_constructors:
+            constructor = self.yaml_constructors[node.tag]
+        else:
+            for tag_prefix in self.yaml_multi_constructors:
+                if node.tag.startswith(tag_prefix):
+                    tag_suffix = node.tag[len(tag_prefix):]
+                    constructor = self.yaml_multi_constructors[tag_prefix]
+                    break
+            else:
+                if None in self.yaml_multi_constructors:
+                    tag_suffix = node.tag
+                    constructor = self.yaml_multi_constructors[None]
+                elif None in self.yaml_constructors:
+                    constructor = self.yaml_constructors[None]
+                elif isinstance(node, ScalarNode):
+                    constructor = self.__class__.construct_scalar
+                elif isinstance(node, SequenceNode):
+                    constructor = self.__class__.construct_sequence
+                elif isinstance(node, MappingNode):
+                    constructor = self.__class__.construct_mapping
+        if tag_suffix is None:
+            data = constructor(self, node)
+        else:
+            data = constructor(self, tag_suffix, node)
+        if isinstance(data, types.GeneratorType):
+            generator = data
+            data = generator.next()
+            if self.deep_construct:
+                for dummy in generator:
+                    pass
+            else:
+                self.state_generators.append(generator)
+        self.constructed_objects[node] = data
+        del self.recursive_objects[node]
+        if deep:
+            self.deep_construct = old_deep
+        return data
+
+    def construct_scalar(self, node):
+        if not isinstance(node, ScalarNode):
+            raise ConstructorError(None, None,
+                    "expected a scalar node, but found %s" % node.id,
+                    node.start_mark)
+        return node.value
+
+    def construct_sequence(self, node, deep=False):
+        if not isinstance(node, SequenceNode):
+            raise ConstructorError(None, None,
+                    "expected a sequence node, but found %s" % node.id,
+                    node.start_mark)
+        return [self.construct_object(child, deep=deep)
+                for child in node.value]
+
+    def construct_mapping(self, node, deep=False):
+        if not isinstance(node, MappingNode):
+            raise ConstructorError(None, None,
+                    "expected a mapping node, but found %s" % node.id,
+                    node.start_mark)
+        mapping = {}
+        for key_node, value_node in node.value:
+            key = self.construct_object(key_node, deep=deep)
+            try:
+                hash(key)
+            except TypeError, exc:
+                raise ConstructorError("while constructing a mapping", node.start_mark,
+                        "found unacceptable key (%s)" % exc, key_node.start_mark)
+            value = self.construct_object(value_node, deep=deep)
+            mapping[key] = value
+        return mapping
+
+    def construct_pairs(self, node, deep=False):
+        if not isinstance(node, MappingNode):
+            raise ConstructorError(None, None,
+                    "expected a mapping node, but found %s" % node.id,
+                    node.start_mark)
+        pairs = []
+        for key_node, value_node in node.value:
+            key = self.construct_object(key_node, deep=deep)
+            value = self.construct_object(value_node, deep=deep)
+            pairs.append((key, value))
+        return pairs
+
+    def add_constructor(cls, tag, constructor):
+        if not 'yaml_constructors' in cls.__dict__:
+            cls.yaml_constructors = cls.yaml_constructors.copy()
+        cls.yaml_constructors[tag] = constructor
+    add_constructor = classmethod(add_constructor)
+
+    def add_multi_constructor(cls, tag_prefix, multi_constructor):
+        if not 'yaml_multi_constructors' in cls.__dict__:
+            cls.yaml_multi_constructors = cls.yaml_multi_constructors.copy()
+        cls.yaml_multi_constructors[tag_prefix] = multi_constructor
+    add_multi_constructor = classmethod(add_multi_constructor)
+
+class SafeConstructor(BaseConstructor):
+
+    def construct_scalar(self, node):
+        if isinstance(node, MappingNode):
+            for key_node, value_node in node.value:
+                if key_node.tag == u'tag:yaml.org,2002:value':
+                    return self.construct_scalar(value_node)
+        return BaseConstructor.construct_scalar(self, node)
+
+    def flatten_mapping(self, node):
+        merge = []
+        index = 0
+        while index < len(node.value):
+            key_node, value_node = node.value[index]
+            if key_node.tag == u'tag:yaml.org,2002:merge':
+                del node.value[index]
+                if isinstance(value_node, MappingNode):
+                    self.flatten_mapping(value_node)
+                    merge.extend(value_node.value)
+                elif isinstance(value_node, SequenceNode):
+                    submerge = []
+                    for subnode in value_node.value:
+                        if not isinstance(subnode, MappingNode):
+                            raise ConstructorError("while constructing a mapping",
+                                    node.start_mark,
+                                    "expected a mapping for merging, but found %s"
+                                    % subnode.id, subnode.start_mark)
+                        self.flatten_mapping(subnode)
+                        submerge.append(subnode.value)
+                    submerge.reverse()
+                    for value in submerge:
+                        merge.extend(value)
+                else:
+                    raise ConstructorError("while constructing a mapping", node.start_mark,
+                            "expected a mapping or list of mappings for merging, but found %s"
+                            % value_node.id, value_node.start_mark)
+            elif key_node.tag == u'tag:yaml.org,2002:value':
+                key_node.tag = u'tag:yaml.org,2002:str'
+                index += 1
+            else:
+                index += 1
+        if merge:
+            node.value = merge + node.value
+
+    def construct_mapping(self, node, deep=False):
+        if isinstance(node, MappingNode):
+            self.flatten_mapping(node)
+        return BaseConstructor.construct_mapping(self, node, deep=deep)
+
+    def construct_yaml_null(self, node):
+        self.construct_scalar(node)
+        return None
+
+    bool_values = {
+        u'yes':     True,
+        u'no':      False,
+        u'true':    True,
+        u'false':   False,
+        u'on':      True,
+        u'off':     False,
+    }
+
+    def construct_yaml_bool(self, node):
+        value = self.construct_scalar(node)
+        return self.bool_values[value.lower()]
+
+    def construct_yaml_int(self, node):
+        value = str(self.construct_scalar(node))
+        value = value.replace('_', '')
+        sign = +1
+        if value[0] == '-':
+            sign = -1
+        if value[0] in '+-':
+            value = value[1:]
+        if value == '0':
+            return 0
+        elif value.startswith('0b'):
+            return sign*int(value[2:], 2)
+        elif value.startswith('0x'):
+            return sign*int(value[2:], 16)
+        elif value[0] == '0':
+            return sign*int(value, 8)
+        elif ':' in value:
+            digits = [int(part) for part in value.split(':')]
+            digits.reverse()
+            base = 1
+            value = 0
+            for digit in digits:
+                value += digit*base
+                base *= 60
+            return sign*value
+        else:
+            return sign*int(value)
+
+    inf_value = 1e300
+    while inf_value != inf_value*inf_value:
+        inf_value *= inf_value
+    nan_value = -inf_value/inf_value   # Trying to make a quiet NaN (like C99).
+
+    def construct_yaml_float(self, node):
+        value = str(self.construct_scalar(node))
+        value = value.replace('_', '').lower()
+        sign = +1
+        if value[0] == '-':
+            sign = -1
+        if value[0] in '+-':
+            value = value[1:]
+        if value == '.inf':
+            return sign*self.inf_value
+        elif value == '.nan':
+            return self.nan_value
+        elif ':' in value:
+            digits = [float(part) for part in value.split(':')]
+            digits.reverse()
+            base = 1
+            value = 0.0
+            for digit in digits:
+                value += digit*base
+                base *= 60
+            return sign*value
+        else:
+            return sign*float(value)
+
+    def construct_yaml_binary(self, node):
+        value = self.construct_scalar(node)
+        try:
+            return str(value).decode('base64')
+        except (binascii.Error, UnicodeEncodeError), exc:
+            raise ConstructorError(None, None,
+                    "failed to decode base64 data: %s" % exc, node.start_mark) 
+
+    timestamp_regexp = re.compile(
+            ur'''^(?P<year>[0-9][0-9][0-9][0-9])
+                -(?P<month>[0-9][0-9]?)
+                -(?P<day>[0-9][0-9]?)
+                (?:(?:[Tt]|[ \t]+)
+                (?P<hour>[0-9][0-9]?)
+                :(?P<minute>[0-9][0-9])
+                :(?P<second>[0-9][0-9])
+                (?:\.(?P<fraction>[0-9]*))?
+                (?:[ \t]*(?P<tz>Z|(?P<tz_sign>[-+])(?P<tz_hour>[0-9][0-9]?)
+                (?::(?P<tz_minute>[0-9][0-9]))?))?)?$''', re.X)
+
+    def construct_yaml_timestamp(self, node):
+        value = self.construct_scalar(node)
+        match = self.timestamp_regexp.match(node.value)
+        values = match.groupdict()
+        year = int(values['year'])
+        month = int(values['month'])
+        day = int(values['day'])
+        if not values['hour']:
+            return datetime.date(year, month, day)
+        hour = int(values['hour'])
+        minute = int(values['minute'])
+        second = int(values['second'])
+        fraction = 0
+        if values['fraction']:
+            fraction = values['fraction'][:6]
+            while len(fraction) < 6:
+                fraction += '0'
+            fraction = int(fraction)
+        delta = None
+        if values['tz_sign']:
+            tz_hour = int(values['tz_hour'])
+            tz_minute = int(values['tz_minute'] or 0)
+            delta = datetime.timedelta(hours=tz_hour, minutes=tz_minute)
+            if values['tz_sign'] == '-':
+                delta = -delta
+        data = datetime.datetime(year, month, day, hour, minute, second, fraction)
+        if delta:
+            data -= delta
+        return data
+
+    def construct_yaml_omap(self, node):
+        # Note: we do not check for duplicate keys, because it's too
+        # CPU-expensive.
+        omap = []
+        yield omap
+        if not isinstance(node, SequenceNode):
+            raise ConstructorError("while constructing an ordered map", node.start_mark,
+                    "expected a sequence, but found %s" % node.id, node.start_mark)
+        for subnode in node.value:
+            if not isinstance(subnode, MappingNode):
+                raise ConstructorError("while constructing an ordered map", node.start_mark,
+                        "expected a mapping of length 1, but found %s" % subnode.id,
+                        subnode.start_mark)
+            if len(subnode.value) != 1:
+                raise ConstructorError("while constructing an ordered map", node.start_mark,
+                        "expected a single mapping item, but found %d items" % len(subnode.value),
+                        subnode.start_mark)
+            key_node, value_node = subnode.value[0]
+            key = self.construct_object(key_node)
+            value = self.construct_object(value_node)
+            omap.append((key, value))
+
+    def construct_yaml_pairs(self, node):
+        # Note: the same code as `construct_yaml_omap`.
+        pairs = []
+        yield pairs
+        if not isinstance(node, SequenceNode):
+            raise ConstructorError("while constructing pairs", node.start_mark,
+                    "expected a sequence, but found %s" % node.id, node.start_mark)
+        for subnode in node.value:
+            if not isinstance(subnode, MappingNode):
+                raise ConstructorError("while constructing pairs", node.start_mark,
+                        "expected a mapping of length 1, but found %s" % subnode.id,
+                        subnode.start_mark)
+            if len(subnode.value) != 1:
+                raise ConstructorError("while constructing pairs", node.start_mark,
+                        "expected a single mapping item, but found %d items" % len(subnode.value),
+                        subnode.start_mark)
+            key_node, value_node = subnode.value[0]
+            key = self.construct_object(key_node)
+            value = self.construct_object(value_node)
+            pairs.append((key, value))
+
+    def construct_yaml_set(self, node):
+        data = set()
+        yield data
+        value = self.construct_mapping(node)
+        data.update(value)
+
+    def construct_yaml_str(self, node):
+        value = self.construct_scalar(node)
+        try:
+            return value.encode('ascii')
+        except UnicodeEncodeError:
+            return value
+
+    def construct_yaml_seq(self, node):
+        data = []
+        yield data
+        data.extend(self.construct_sequence(node))
+
+    def construct_yaml_map(self, node):
+        data = {}
+        yield data
+        value = self.construct_mapping(node)
+        data.update(value)
+
+    def construct_yaml_object(self, node, cls):
+        data = cls.__new__(cls)
+        yield data
+        if hasattr(data, '__setstate__'):
+            state = self.construct_mapping(node, deep=True)
+            data.__setstate__(state)
+        else:
+            state = self.construct_mapping(node)
+            data.__dict__.update(state)
+
+    def construct_undefined(self, node):
+        raise ConstructorError(None, None,
+                "could not determine a constructor for the tag %r" % node.tag.encode('utf-8'),
+                node.start_mark)
+
+SafeConstructor.add_constructor(
+        u'tag:yaml.org,2002:null',
+        SafeConstructor.construct_yaml_null)
+
+SafeConstructor.add_constructor(
+        u'tag:yaml.org,2002:bool',
+        SafeConstructor.construct_yaml_bool)
+
+SafeConstructor.add_constructor(
+        u'tag:yaml.org,2002:int',
+        SafeConstructor.construct_yaml_int)
+
+SafeConstructor.add_constructor(
+        u'tag:yaml.org,2002:float',
+        SafeConstructor.construct_yaml_float)
+
+SafeConstructor.add_constructor(
+        u'tag:yaml.org,2002:binary',
+        SafeConstructor.construct_yaml_binary)
+
+SafeConstructor.add_constructor(
+        u'tag:yaml.org,2002:timestamp',
+        SafeConstructor.construct_yaml_timestamp)
+
+SafeConstructor.add_constructor(
+        u'tag:yaml.org,2002:omap',
+        SafeConstructor.construct_yaml_omap)
+
+SafeConstructor.add_constructor(
+        u'tag:yaml.org,2002:pairs',
+        SafeConstructor.construct_yaml_pairs)
+
+SafeConstructor.add_constructor(
+        u'tag:yaml.org,2002:set',
+        SafeConstructor.construct_yaml_set)
+
+SafeConstructor.add_constructor(
+        u'tag:yaml.org,2002:str',
+        SafeConstructor.construct_yaml_str)
+
+SafeConstructor.add_constructor(
+        u'tag:yaml.org,2002:seq',
+        SafeConstructor.construct_yaml_seq)
+
+SafeConstructor.add_constructor(
+        u'tag:yaml.org,2002:map',
+        SafeConstructor.construct_yaml_map)
+
+SafeConstructor.add_constructor(None,
+        SafeConstructor.construct_undefined)
+
+class Constructor(SafeConstructor):
+
+    def construct_python_str(self, node):
+        return self.construct_scalar(node).encode('utf-8')
+
+    def construct_python_unicode(self, node):
+        return self.construct_scalar(node)
+
+    def construct_python_long(self, node):
+        return long(self.construct_yaml_int(node))
+
+    def construct_python_complex(self, node):
+       return complex(self.construct_scalar(node))
+
+    def construct_python_tuple(self, node):
+        return tuple(self.construct_sequence(node))
+
+    def find_python_module(self, name, mark):
+        if not name:
+            raise ConstructorError("while constructing a Python module", mark,
+                    "expected non-empty name appended to the tag", mark)
+        try:
+            __import__(name)
+        except ImportError, exc:
+            raise ConstructorError("while constructing a Python module", mark,
+                    "cannot find module %r (%s)" % (name.encode('utf-8'), exc), mark)
+        return sys.modules[name]
+
+    def find_python_name(self, name, mark):
+        if not name:
+            raise ConstructorError("while constructing a Python object", mark,
+                    "expected non-empty name appended to the tag", mark)
+        if u'.' in name:
+            # Python 2.4 only
+            #module_name, object_name = name.rsplit('.', 1)
+            items = name.split('.')
+            object_name = items.pop()
+            module_name = '.'.join(items)
+        else:
+            module_name = '__builtin__'
+            object_name = name
+        try:
+            __import__(module_name)
+        except ImportError, exc:
+            raise ConstructorError("while constructing a Python object", mark,
+                    "cannot find module %r (%s)" % (module_name.encode('utf-8'), exc), mark)
+        module = sys.modules[module_name]
+        if not hasattr(module, object_name):
+            raise ConstructorError("while constructing a Python object", mark,
+                    "cannot find %r in the module %r" % (object_name.encode('utf-8'),
+                        module.__name__), mark)
+        return getattr(module, object_name)
+
+    def construct_python_name(self, suffix, node):
+        value = self.construct_scalar(node)
+        if value:
+            raise ConstructorError("while constructing a Python name", node.start_mark,
+                    "expected the empty value, but found %r" % value.encode('utf-8'),
+                    node.start_mark)
+        return self.find_python_name(suffix, node.start_mark)
+
+    def construct_python_module(self, suffix, node):
+        value = self.construct_scalar(node)
+        if value:
+            raise ConstructorError("while constructing a Python module", node.start_mark,
+                    "expected the empty value, but found %r" % value.encode('utf-8'),
+                    node.start_mark)
+        return self.find_python_module(suffix, node.start_mark)
+
+    class classobj: pass
+
+    def make_python_instance(self, suffix, node,
+            args=None, kwds=None, newobj=False):
+        if not args:
+            args = []
+        if not kwds:
+            kwds = {}
+        cls = self.find_python_name(suffix, node.start_mark)
+        if newobj and isinstance(cls, type(self.classobj))  \
+                and not args and not kwds:
+            instance = self.classobj()
+            instance.__class__ = cls
+            return instance
+        elif newobj and isinstance(cls, type):
+            return cls.__new__(cls, *args, **kwds)
+        else:
+            return cls(*args, **kwds)
+
+    def set_python_instance_state(self, instance, state):
+        if hasattr(instance, '__setstate__'):
+            instance.__setstate__(state)
+        else:
+            slotstate = {}
+            if isinstance(state, tuple) and len(state) == 2:
+                state, slotstate = state
+            if hasattr(instance, '__dict__'):
+                instance.__dict__.update(state)
+            elif state:
+                slotstate.update(state)
+            for key, value in slotstate.items():
+                setattr(object, key, value)
+
+    def construct_python_object(self, suffix, node):
+        # Format:
+        #   !!python/object:module.name { ... state ... }
+        instance = self.make_python_instance(suffix, node, newobj=True)
+        yield instance
+        deep = hasattr(instance, '__setstate__')
+        state = self.construct_mapping(node, deep=deep)
+        self.set_python_instance_state(instance, state)
+
+    def construct_python_object_apply(self, suffix, node, newobj=False):
+        # Format:
+        #   !!python/object/apply       # (or !!python/object/new)
+        #   args: [ ... arguments ... ]
+        #   kwds: { ... keywords ... }
+        #   state: ... state ...
+        #   listitems: [ ... listitems ... ]
+        #   dictitems: { ... dictitems ... }
+        # or short format:
+        #   !!python/object/apply [ ... arguments ... ]
+        # The difference between !!python/object/apply and !!python/object/new
+        # is how an object is created, check make_python_instance for details.
+        if isinstance(node, SequenceNode):
+            args = self.construct_sequence(node, deep=True)
+            kwds = {}
+            state = {}
+            listitems = []
+            dictitems = {}
+        else:
+            value = self.construct_mapping(node, deep=True)
+            args = value.get('args', [])
+            kwds = value.get('kwds', {})
+            state = value.get('state', {})
+            listitems = value.get('listitems', [])
+            dictitems = value.get('dictitems', {})
+        instance = self.make_python_instance(suffix, node, args, kwds, newobj)
+        if state:
+            self.set_python_instance_state(instance, state)
+        if listitems:
+            instance.extend(listitems)
+        if dictitems:
+            for key in dictitems:
+                instance[key] = dictitems[key]
+        return instance
+
+    def construct_python_object_new(self, suffix, node):
+        return self.construct_python_object_apply(suffix, node, newobj=True)
+
+Constructor.add_constructor(
+    u'tag:yaml.org,2002:python/none',
+    Constructor.construct_yaml_null)
+
+Constructor.add_constructor(
+    u'tag:yaml.org,2002:python/bool',
+    Constructor.construct_yaml_bool)
+
+Constructor.add_constructor(
+    u'tag:yaml.org,2002:python/str',
+    Constructor.construct_python_str)
+
+Constructor.add_constructor(
+    u'tag:yaml.org,2002:python/unicode',
+    Constructor.construct_python_unicode)
+
+Constructor.add_constructor(
+    u'tag:yaml.org,2002:python/int',
+    Constructor.construct_yaml_int)
+
+Constructor.add_constructor(
+    u'tag:yaml.org,2002:python/long',
+    Constructor.construct_python_long)
+
+Constructor.add_constructor(
+    u'tag:yaml.org,2002:python/float',
+    Constructor.construct_yaml_float)
+
+Constructor.add_constructor(
+    u'tag:yaml.org,2002:python/complex',
+    Constructor.construct_python_complex)
+
+Constructor.add_constructor(
+    u'tag:yaml.org,2002:python/list',
+    Constructor.construct_yaml_seq)
+
+Constructor.add_constructor(
+    u'tag:yaml.org,2002:python/tuple',
+    Constructor.construct_python_tuple)
+
+Constructor.add_constructor(
+    u'tag:yaml.org,2002:python/dict',
+    Constructor.construct_yaml_map)
+
+Constructor.add_multi_constructor(
+    u'tag:yaml.org,2002:python/name:',
+    Constructor.construct_python_name)
+
+Constructor.add_multi_constructor(
+    u'tag:yaml.org,2002:python/module:',
+    Constructor.construct_python_module)
+
+Constructor.add_multi_constructor(
+    u'tag:yaml.org,2002:python/object:',
+    Constructor.construct_python_object)
+
+Constructor.add_multi_constructor(
+    u'tag:yaml.org,2002:python/object/apply:',
+    Constructor.construct_python_object_apply)
+
+Constructor.add_multi_constructor(
+    u'tag:yaml.org,2002:python/object/new:',
+    Constructor.construct_python_object_new)
+
diff --git a/tablib/packages/yaml/cyaml.py b/tablib/packages/yaml/cyaml.py
new file mode 100644
index 0000000..68dcd75
--- /dev/null
+++ b/tablib/packages/yaml/cyaml.py
@@ -0,0 +1,85 @@
+
+__all__ = ['CBaseLoader', 'CSafeLoader', 'CLoader',
+        'CBaseDumper', 'CSafeDumper', 'CDumper']
+
+from _yaml import CParser, CEmitter
+
+from constructor import *
+
+from serializer import *
+from representer import *
+
+from resolver import *
+
+class CBaseLoader(CParser, BaseConstructor, BaseResolver):
+
+    def __init__(self, stream):
+        CParser.__init__(self, stream)
+        BaseConstructor.__init__(self)
+        BaseResolver.__init__(self)
+
+class CSafeLoader(CParser, SafeConstructor, Resolver):
+
+    def __init__(self, stream):
+        CParser.__init__(self, stream)
+        SafeConstructor.__init__(self)
+        Resolver.__init__(self)
+
+class CLoader(CParser, Constructor, Resolver):
+
+    def __init__(self, stream):
+        CParser.__init__(self, stream)
+        Constructor.__init__(self)
+        Resolver.__init__(self)
+
+class CBaseDumper(CEmitter, BaseRepresenter, BaseResolver):
+
+    def __init__(self, stream,
+            default_style=None, default_flow_style=None,
+            canonical=None, indent=None, width=None,
+            allow_unicode=None, line_break=None,
+            encoding=None, explicit_start=None, explicit_end=None,
+            version=None, tags=None):
+        CEmitter.__init__(self, stream, canonical=canonical,
+                indent=indent, width=width, encoding=encoding,
+                allow_unicode=allow_unicode, line_break=line_break,
+                explicit_start=explicit_start, explicit_end=explicit_end,
+                version=version, tags=tags)
+        Representer.__init__(self, default_style=default_style,
+                default_flow_style=default_flow_style)
+        Resolver.__init__(self)
+
+class CSafeDumper(CEmitter, SafeRepresenter, Resolver):
+
+    def __init__(self, stream,
+            default_style=None, default_flow_style=None,
+            canonical=None, indent=None, width=None,
+            allow_unicode=None, line_break=None,
+            encoding=None, explicit_start=None, explicit_end=None,
+            version=None, tags=None):
+        CEmitter.__init__(self, stream, canonical=canonical,
+                indent=indent, width=width, encoding=encoding,
+                allow_unicode=allow_unicode, line_break=line_break,
+                explicit_start=explicit_start, explicit_end=explicit_end,
+                version=version, tags=tags)
+        SafeRepresenter.__init__(self, default_style=default_style,
+                default_flow_style=default_flow_style)
+        Resolver.__init__(self)
+
+class CDumper(CEmitter, Serializer, Representer, Resolver):
+
+    def __init__(self, stream,
+            default_style=None, default_flow_style=None,
+            canonical=None, indent=None, width=None,
+            allow_unicode=None, line_break=None,
+            encoding=None, explicit_start=None, explicit_end=None,
+            version=None, tags=None):
+        CEmitter.__init__(self, stream, canonical=canonical,
+                indent=indent, width=width, encoding=encoding,
+                allow_unicode=allow_unicode, line_break=line_break,
+                explicit_start=explicit_start, explicit_end=explicit_end,
+                version=version, tags=tags)
+        Representer.__init__(self, default_style=default_style,
+                default_flow_style=default_flow_style)
+        Resolver.__init__(self)
+
diff --git a/tablib/packages/yaml/dumper.py b/tablib/packages/yaml/dumper.py
new file mode 100644
index 0000000..f811d2c
--- /dev/null
+++ b/tablib/packages/yaml/dumper.py
@@ -0,0 +1,62 @@
+
+__all__ = ['BaseDumper', 'SafeDumper', 'Dumper']
+
+from emitter import *
+from serializer import *
+from representer import *
+from resolver import *
+
+class BaseDumper(Emitter, Serializer, BaseRepresenter, BaseResolver):
+
+    def __init__(self, stream,
+            default_style=None, default_flow_style=None,
+            canonical=None, indent=None, width=None,
+            allow_unicode=None, line_break=None,
+            encoding=None, explicit_start=None, explicit_end=None,
+            version=None, tags=None):
+        Emitter.__init__(self, stream, canonical=canonical,
+                indent=indent, width=width,
+                allow_unicode=allow_unicode, line_break=line_break)
+        Serializer.__init__(self, encoding=encoding,
+                explicit_start=explicit_start, explicit_end=explicit_end,
+                version=version, tags=tags)
+        Representer.__init__(self, default_style=default_style,
+                default_flow_style=default_flow_style)
+        Resolver.__init__(self)
+
+class SafeDumper(Emitter, Serializer, SafeRepresenter, Resolver):
+
+    def __init__(self, stream,
+            default_style=None, default_flow_style=None,
+            canonical=None, indent=None, width=None,
+            allow_unicode=None, line_break=None,
+            encoding=None, explicit_start=None, explicit_end=None,
+            version=None, tags=None):
+        Emitter.__init__(self, stream, canonical=canonical,
+                indent=indent, width=width,
+                allow_unicode=allow_unicode, line_break=line_break)
+        Serializer.__init__(self, encoding=encoding,
+                explicit_start=explicit_start, explicit_end=explicit_end,
+                version=version, tags=tags)
+        SafeRepresenter.__init__(self, default_style=default_style,
+                default_flow_style=default_flow_style)
+        Resolver.__init__(self)
+
+class Dumper(Emitter, Serializer, Representer, Resolver):
+
+    def __init__(self, stream,
+            default_style=None, default_flow_style=None,
+            canonical=None, indent=None, width=None,
+            allow_unicode=None, line_break=None,
+            encoding=None, explicit_start=None, explicit_end=None,
+            version=None, tags=None):
+        Emitter.__init__(self, stream, canonical=canonical,
+                indent=indent, width=width,
+                allow_unicode=allow_unicode, line_break=line_break)
+        Serializer.__init__(self, encoding=encoding,
+                explicit_start=explicit_start, explicit_end=explicit_end,
+                version=version, tags=tags)
+        Representer.__init__(self, default_style=default_style,
+                default_flow_style=default_flow_style)
+        Resolver.__init__(self)
+
diff --git a/tablib/packages/yaml/emitter.py b/tablib/packages/yaml/emitter.py
new file mode 100644
index 0000000..4cb2c8a
--- /dev/null
+++ b/tablib/packages/yaml/emitter.py
@@ -0,0 +1,1135 @@
+
+# Emitter expects events obeying the following grammar:
+# stream ::= STREAM-START document* STREAM-END
+# document ::= DOCUMENT-START node DOCUMENT-END
+# node ::= SCALAR | sequence | mapping
+# sequence ::= SEQUENCE-START node* SEQUENCE-END
+# mapping ::= MAPPING-START (node node)* MAPPING-END
+
+__all__ = ['Emitter', 'EmitterError']
+
+from error import YAMLError
+from events import *
+
+class EmitterError(YAMLError):
+    pass
+
+class ScalarAnalysis(object):
+    def __init__(self, scalar, empty, multiline,
+            allow_flow_plain, allow_block_plain,
+            allow_single_quoted, allow_double_quoted,
+            allow_block):
+        self.scalar = scalar
+        self.empty = empty
+        self.multiline = multiline
+        self.allow_flow_plain = allow_flow_plain
+        self.allow_block_plain = allow_block_plain
+        self.allow_single_quoted = allow_single_quoted
+        self.allow_double_quoted = allow_double_quoted
+        self.allow_block = allow_block
+
+class Emitter(object):
+
+    DEFAULT_TAG_PREFIXES = {
+        u'!' : u'!',
+        u'tag:yaml.org,2002:' : u'!!',
+    }
+
+    def __init__(self, stream, canonical=None, indent=None, width=None,
+            allow_unicode=None, line_break=None):
+
+        # The stream should have the methods `write` and possibly `flush`.
+        self.stream = stream
+
+        # Encoding can be overriden by STREAM-START.
+        self.encoding = None
+
+        # Emitter is a state machine with a stack of states to handle nested
+        # structures.
+        self.states = []
+        self.state = self.expect_stream_start
+
+        # Current event and the event queue.
+        self.events = []
+        self.event = None
+
+        # The current indentation level and the stack of previous indents.
+        self.indents = []
+        self.indent = None
+
+        # Flow level.
+        self.flow_level = 0
+
+        # Contexts.
+        self.root_context = False
+        self.sequence_context = False
+        self.mapping_context = False
+        self.simple_key_context = False
+
+        # Characteristics of the last emitted character:
+        #  - current position.
+        #  - is it a whitespace?
+        #  - is it an indention character
+        #    (indentation space, '-', '?', or ':')?
+        self.line = 0
+        self.column = 0
+        self.whitespace = True
+        self.indention = True
+
+        # Whether the document requires an explicit document indicator
+        self.open_ended = False
+
+        # Formatting details.
+        self.canonical = canonical
+        self.allow_unicode = allow_unicode
+        self.best_indent = 2
+        if indent and 1 < indent < 10:
+            self.best_indent = indent
+        self.best_width = 80
+        if width and width > self.best_indent*2:
+            self.best_width = width
+        self.best_line_break = u'\n'
+        if line_break in [u'\r', u'\n', u'\r\n']:
+            self.best_line_break = line_break
+
+        # Tag prefixes.
+        self.tag_prefixes = None
+
+        # Prepared anchor and tag.
+        self.prepared_anchor = None
+        self.prepared_tag = None
+
+        # Scalar analysis and style.
+        self.analysis = None
+        self.style = None
+
+    def emit(self, event):
+        self.events.append(event)
+        while not self.need_more_events():
+            self.event = self.events.pop(0)
+            self.state()
+            self.event = None
+
+    # In some cases, we wait for a few next events before emitting.
+
+    def need_more_events(self):
+        if not self.events:
+            return True
+        event = self.events[0]
+        if isinstance(event, DocumentStartEvent):
+            return self.need_events(1)
+        elif isinstance(event, SequenceStartEvent):
+            return self.need_events(2)
+        elif isinstance(event, MappingStartEvent):
+            return self.need_events(3)
+        else:
+            return False
+
+    def need_events(self, count):
+        level = 0
+        for event in self.events[1:]:
+            if isinstance(event, (DocumentStartEvent, CollectionStartEvent)):
+                level += 1
+            elif isinstance(event, (DocumentEndEvent, CollectionEndEvent)):
+                level -= 1
+            elif isinstance(event, StreamEndEvent):
+                level = -1
+            if level < 0:
+                return False
+        return (len(self.events) < count+1)
+
+    def increase_indent(self, flow=False, indentless=False):
+        self.indents.append(self.indent)
+        if self.indent is None:
+            if flow:
+                self.indent = self.best_indent
+            else:
+                self.indent = 0
+        elif not indentless:
+            self.indent += self.best_indent
+
+    # States.
+
+    # Stream handlers.
+
+    def expect_stream_start(self):
+        if isinstance(self.event, StreamStartEvent):
+            if self.event.encoding and not getattr(self.stream, 'encoding', None):
+                self.encoding = self.event.encoding
+            self.write_stream_start()
+            self.state = self.expect_first_document_start
+        else:
+            raise EmitterError("expected StreamStartEvent, but got %s"
+                    % self.event)
+
+    def expect_nothing(self):
+        raise EmitterError("expected nothing, but got %s" % self.event)
+
+    # Document handlers.
+
+    def expect_first_document_start(self):
+        return self.expect_document_start(first=True)
+
+    def expect_document_start(self, first=False):
+        if isinstance(self.event, DocumentStartEvent):
+            if (self.event.version or self.event.tags) and self.open_ended:
+                self.write_indicator(u'...', True)
+                self.write_indent()
+            if self.event.version:
+                version_text = self.prepare_version(self.event.version)
+                self.write_version_directive(version_text)
+            self.tag_prefixes = self.DEFAULT_TAG_PREFIXES.copy()
+            if self.event.tags:
+                handles = self.event.tags.keys()
+                handles.sort()
+                for handle in handles:
+                    prefix = self.event.tags[handle]
+                    self.tag_prefixes[prefix] = handle
+                    handle_text = self.prepare_tag_handle(handle)
+                    prefix_text = self.prepare_tag_prefix(prefix)
+                    self.write_tag_directive(handle_text, prefix_text)
+            implicit = (first and not self.event.explicit and not self.canonical
+                    and not self.event.version and not self.event.tags
+                    and not self.check_empty_document())
+            if not implicit:
+                self.write_indent()
+                self.write_indicator(u'---', True)
+                if self.canonical:
+                    self.write_indent()
+            self.state = self.expect_document_root
+        elif isinstance(self.event, StreamEndEvent):
+            if self.open_ended:
+                self.write_indicator(u'...', True)
+                self.write_indent()
+            self.write_stream_end()
+            self.state = self.expect_nothing
+        else:
+            raise EmitterError("expected DocumentStartEvent, but got %s"
+                    % self.event)
+
+    def expect_document_end(self):
+        if isinstance(self.event, DocumentEndEvent):
+            self.write_indent()
+            if self.event.explicit:
+                self.write_indicator(u'...', True)
+                self.write_indent()
+            self.flush_stream()
+            self.state = self.expect_document_start
+        else:
+            raise EmitterError("expected DocumentEndEvent, but got %s"
+                    % self.event)
+
+    def expect_document_root(self):
+        self.states.append(self.expect_document_end)
+        self.expect_node(root=True)
+
+    # Node handlers.
+
+    def expect_node(self, root=False, sequence=False, mapping=False,
+            simple_key=False):
+        self.root_context = root
+        self.sequence_context = sequence
+        self.mapping_context = mapping
+        self.simple_key_context = simple_key
+        if isinstance(self.event, AliasEvent):
+            self.expect_alias()
+        elif isinstance(self.event, (ScalarEvent, CollectionStartEvent)):
+            self.process_anchor(u'&')
+            self.process_tag()
+            if isinstance(self.event, ScalarEvent):
+                self.expect_scalar()
+            elif isinstance(self.event, SequenceStartEvent):
+                if self.flow_level or self.canonical or self.event.flow_style   \
+                        or self.check_empty_sequence():
+                    self.expect_flow_sequence()
+                else:
+                    self.expect_block_sequence()
+            elif isinstance(self.event, MappingStartEvent):
+                if self.flow_level or self.canonical or self.event.flow_style   \
+                        or self.check_empty_mapping():
+                    self.expect_flow_mapping()
+                else:
+                    self.expect_block_mapping()
+        else:
+            raise EmitterError("expected NodeEvent, but got %s" % self.event)
+
+    def expect_alias(self):
+        if self.event.anchor is None:
+            raise EmitterError("anchor is not specified for alias")
+        self.process_anchor(u'*')
+        self.state = self.states.pop()
+
+    def expect_scalar(self):
+        self.increase_indent(flow=True)
+        self.process_scalar()
+        self.indent = self.indents.pop()
+        self.state = self.states.pop()
+
+    # Flow sequence handlers.
+
+    def expect_flow_sequence(self):
+        self.write_indicator(u'[', True, whitespace=True)
+        self.flow_level += 1
+        self.increase_indent(flow=True)
+        self.state = self.expect_first_flow_sequence_item
+
+    def expect_first_flow_sequence_item(self):
+        if isinstance(self.event, SequenceEndEvent):
+            self.indent = self.indents.pop()
+            self.flow_level -= 1
+            self.write_indicator(u']', False)
+            self.state = self.states.pop()
+        else:
+            if self.canonical or self.column > self.best_width:
+                self.write_indent()
+            self.states.append(self.expect_flow_sequence_item)
+            self.expect_node(sequence=True)
+
+    def expect_flow_sequence_item(self):
+        if isinstance(self.event, SequenceEndEvent):
+            self.indent = self.indents.pop()
+            self.flow_level -= 1
+            if self.canonical:
+                self.write_indicator(u',', False)
+                self.write_indent()
+            self.write_indicator(u']', False)
+            self.state = self.states.pop()
+        else:
+            self.write_indicator(u',', False)
+            if self.canonical or self.column > self.best_width:
+                self.write_indent()
+            self.states.append(self.expect_flow_sequence_item)
+            self.expect_node(sequence=True)
+
+    # Flow mapping handlers.
+
+    def expect_flow_mapping(self):
+        self.write_indicator(u'{', True, whitespace=True)
+        self.flow_level += 1
+        self.increase_indent(flow=True)
+        self.state = self.expect_first_flow_mapping_key
+
+    def expect_first_flow_mapping_key(self):
+        if isinstance(self.event, MappingEndEvent):
+            self.indent = self.indents.pop()
+            self.flow_level -= 1
+            self.write_indicator(u'}', False)
+            self.state = self.states.pop()
+        else:
+            if self.canonical or self.column > self.best_width:
+                self.write_indent()
+            if not self.canonical and self.check_simple_key():
+                self.states.append(self.expect_flow_mapping_simple_value)
+                self.expect_node(mapping=True, simple_key=True)
+            else:
+                self.write_indicator(u'?', True)
+                self.states.append(self.expect_flow_mapping_value)
+                self.expect_node(mapping=True)
+
+    def expect_flow_mapping_key(self):
+        if isinstance(self.event, MappingEndEvent):
+            self.indent = self.indents.pop()
+            self.flow_level -= 1
+            if self.canonical:
+                self.write_indicator(u',', False)
+                self.write_indent()
+            self.write_indicator(u'}', False)
+            self.state = self.states.pop()
+        else:
+            self.write_indicator(u',', False)
+            if self.canonical or self.column > self.best_width:
+                self.write_indent()
+            if not self.canonical and self.check_simple_key():
+                self.states.append(self.expect_flow_mapping_simple_value)
+                self.expect_node(mapping=True, simple_key=True)
+            else:
+                self.write_indicator(u'?', True)
+                self.states.append(self.expect_flow_mapping_value)
+                self.expect_node(mapping=True)
+
+    def expect_flow_mapping_simple_value(self):
+        self.write_indicator(u':', False)
+        self.states.append(self.expect_flow_mapping_key)
+        self.expect_node(mapping=True)
+
+    def expect_flow_mapping_value(self):
+        if self.canonical or self.column > self.best_width:
+            self.write_indent()
+        self.write_indicator(u':', True)
+        self.states.append(self.expect_flow_mapping_key)
+        self.expect_node(mapping=True)
+
+    # Block sequence handlers.
+
+    def expect_block_sequence(self):
+        indentless = (self.mapping_context and not self.indention)
+        self.increase_indent(flow=False, indentless=indentless)
+        self.state = self.expect_first_block_sequence_item
+
+    def expect_first_block_sequence_item(self):
+        return self.expect_block_sequence_item(first=True)
+
+    def expect_block_sequence_item(self, first=False):
+        if not first and isinstance(self.event, SequenceEndEvent):
+            self.indent = self.indents.pop()
+            self.state = self.states.pop()
+        else:
+            self.write_indent()
+            self.write_indicator(u'-', True, indention=True)
+            self.states.append(self.expect_block_sequence_item)
+            self.expect_node(sequence=True)
+
+    # Block mapping handlers.
+
+    def expect_block_mapping(self):
+        self.increase_indent(flow=False)
+        self.state = self.expect_first_block_mapping_key
+
+    def expect_first_block_mapping_key(self):
+        return self.expect_block_mapping_key(first=True)
+
+    def expect_block_mapping_key(self, first=False):
+        if not first and isinstance(self.event, MappingEndEvent):
+            self.indent = self.indents.pop()
+            self.state = self.states.pop()
+        else:
+            self.write_indent()
+            if self.check_simple_key():
+                self.states.append(self.expect_block_mapping_simple_value)
+                self.expect_node(mapping=True, simple_key=True)
+            else:
+                self.write_indicator(u'?', True, indention=True)
+                self.states.append(self.expect_block_mapping_value)
+                self.expect_node(mapping=True)
+
+    def expect_block_mapping_simple_value(self):
+        self.write_indicator(u':', False)
+        self.states.append(self.expect_block_mapping_key)
+        self.expect_node(mapping=True)
+
+    def expect_block_mapping_value(self):
+        self.write_indent()
+        self.write_indicator(u':', True, indention=True)
+        self.states.append(self.expect_block_mapping_key)
+        self.expect_node(mapping=True)
+
+    # Checkers.
+
+    def check_empty_sequence(self):
+        return (isinstance(self.event, SequenceStartEvent) and self.events
+                and isinstance(self.events[0], SequenceEndEvent))
+
+    def check_empty_mapping(self):
+        return (isinstance(self.event, MappingStartEvent) and self.events
+                and isinstance(self.events[0], MappingEndEvent))
+
+    def check_empty_document(self):
+        if not isinstance(self.event, DocumentStartEvent) or not self.events:
+            return False
+        event = self.events[0]
+        return (isinstance(event, ScalarEvent) and event.anchor is None
+                and event.tag is None and event.implicit and event.value == u'')
+
+    def check_simple_key(self):
+        length = 0
+        if isinstance(self.event, NodeEvent) and self.event.anchor is not None:
+            if self.prepared_anchor is None:
+                self.prepared_anchor = self.prepare_anchor(self.event.anchor)
+            length += len(self.prepared_anchor)
+        if isinstance(self.event, (ScalarEvent, CollectionStartEvent))  \
+                and self.event.tag is not None:
+            if self.prepared_tag is None:
+                self.prepared_tag = self.prepare_tag(self.event.tag)
+            length += len(self.prepared_tag)
+        if isinstance(self.event, ScalarEvent):
+            if self.analysis is None:
+                self.analysis = self.analyze_scalar(self.event.value)
+            length += len(self.analysis.scalar)
+        return (length < 128 and (isinstance(self.event, AliasEvent)
+            or (isinstance(self.event, ScalarEvent)
+                    and not self.analysis.empty and not self.analysis.multiline)
+            or self.check_empty_sequence() or self.check_empty_mapping()))
+
+    # Anchor, Tag, and Scalar processors.
+
+    def process_anchor(self, indicator):
+        if self.event.anchor is None:
+            self.prepared_anchor = None
+            return
+        if self.prepared_anchor is None:
+            self.prepared_anchor = self.prepare_anchor(self.event.anchor)
+        if self.prepared_anchor:
+            self.write_indicator(indicator+self.prepared_anchor, True)
+        self.prepared_anchor = None
+
+    def process_tag(self):
+        tag = self.event.tag
+        if isinstance(self.event, ScalarEvent):
+            if self.style is None:
+                self.style = self.choose_scalar_style()
+            if ((not self.canonical or tag is None) and
+                ((self.style == '' and self.event.implicit[0])
+                        or (self.style != '' and self.event.implicit[1]))):
+                self.prepared_tag = None
+                return
+            if self.event.implicit[0] and tag is None:
+                tag = u'!'
+                self.prepared_tag = None
+        else:
+            if (not self.canonical or tag is None) and self.event.implicit:
+                self.prepared_tag = None
+                return
+        if tag is None:
+            raise EmitterError("tag is not specified")
+        if self.prepared_tag is None:
+            self.prepared_tag = self.prepare_tag(tag)
+        if self.prepared_tag:
+            self.write_indicator(self.prepared_tag, True)
+        self.prepared_tag = None
+
+    def choose_scalar_style(self):
+        if self.analysis is None:
+            self.analysis = self.analyze_scalar(self.event.value)
+        if self.event.style == '"' or self.canonical:
+            return '"'
+        if not self.event.style and self.event.implicit[0]:
+            if (not (self.simple_key_context and
+                    (self.analysis.empty or self.analysis.multiline))
+                and (self.flow_level and self.analysis.allow_flow_plain
+                    or (not self.flow_level and self.analysis.allow_block_plain))):
+                return ''
+        if self.event.style and self.event.style in '|>':
+            if (not self.flow_level and not self.simple_key_context
+                    and self.analysis.allow_block):
+                return self.event.style
+        if not self.event.style or self.event.style == '\'':
+            if (self.analysis.allow_single_quoted and
+                    not (self.simple_key_context and self.analysis.multiline)):
+                return '\''
+        return '"'
+
+    def process_scalar(self):
+        if self.analysis is None:
+            self.analysis = self.analyze_scalar(self.event.value)
+        if self.style is None:
+            self.style = self.choose_scalar_style()
+        split = (not self.simple_key_context)
+        #if self.analysis.multiline and split    \
+        #        and (not self.style or self.style in '\'\"'):
+        #    self.write_indent()
+        if self.style == '"':
+            self.write_double_quoted(self.analysis.scalar, split)
+        elif self.style == '\'':
+            self.write_single_quoted(self.analysis.scalar, split)
+        elif self.style == '>':
+            self.write_folded(self.analysis.scalar)
+        elif self.style == '|':
+            self.write_literal(self.analysis.scalar)
+        else:
+            self.write_plain(self.analysis.scalar, split)
+        self.analysis = None
+        self.style = None
+
+    # Analyzers.
+
+    def prepare_version(self, version):
+        major, minor = version
+        if major != 1:
+            raise EmitterError("unsupported YAML version: %d.%d" % (major, minor))
+        return u'%d.%d' % (major, minor)
+
+    def prepare_tag_handle(self, handle):
+        if not handle:
+            raise EmitterError("tag handle must not be empty")
+        if handle[0] != u'!' or handle[-1] != u'!':
+            raise EmitterError("tag handle must start and end with '!': %r"
+                    % (handle.encode('utf-8')))
+        for ch in handle[1:-1]:
+            if not (u'0' <= ch <= u'9' or u'A' <= ch <= u'Z' or u'a' <= ch <= u'z'  \
+                    or ch in u'-_'):
+                raise EmitterError("invalid character %r in the tag handle: %r"
+                        % (ch.encode('utf-8'), handle.encode('utf-8')))
+        return handle
+
+    def prepare_tag_prefix(self, prefix):
+        if not prefix:
+            raise EmitterError("tag prefix must not be empty")
+        chunks = []
+        start = end = 0
+        if prefix[0] == u'!':
+            end = 1
+        while end < len(prefix):
+            ch = prefix[end]
+            if u'0' <= ch <= u'9' or u'A' <= ch <= u'Z' or u'a' <= ch <= u'z'   \
+                    or ch in u'-;/?!:@&=+$,_.~*\'()[]':
+                end += 1
+            else:
+                if start < end:
+                    chunks.append(prefix[start:end])
+                start = end = end+1
+                data = ch.encode('utf-8')
+                for ch in data:
+                    chunks.append(u'%%%02X' % ord(ch))
+        if start < end:
+            chunks.append(prefix[start:end])
+        return u''.join(chunks)
+
+    def prepare_tag(self, tag):
+        if not tag:
+            raise EmitterError("tag must not be empty")
+        if tag == u'!':
+            return tag
+        handle = None
+        suffix = tag
+        prefixes = self.tag_prefixes.keys()
+        prefixes.sort()
+        for prefix in prefixes:
+            if tag.startswith(prefix)   \
+                    and (prefix == u'!' or len(prefix) < len(tag)):
+                handle = self.tag_prefixes[prefix]
+                suffix = tag[len(prefix):]
+        chunks = []
+        start = end = 0
+        while end < len(suffix):
+            ch = suffix[end]
+            if u'0' <= ch <= u'9' or u'A' <= ch <= u'Z' or u'a' <= ch <= u'z'   \
+                    or ch in u'-;/?:@&=+$,_.~*\'()[]'   \
+                    or (ch == u'!' and handle != u'!'):
+                end += 1
+            else:
+                if start < end:
+                    chunks.append(suffix[start:end])
+                start = end = end+1
+                data = ch.encode('utf-8')
+                for ch in data:
+                    chunks.append(u'%%%02X' % ord(ch))
+        if start < end:
+            chunks.append(suffix[start:end])
+        suffix_text = u''.join(chunks)
+        if handle:
+            return u'%s%s' % (handle, suffix_text)
+        else:
+            return u'!<%s>' % suffix_text
+
+    def prepare_anchor(self, anchor):
+        if not anchor:
+            raise EmitterError("anchor must not be empty")
+        for ch in anchor:
+            if not (u'0' <= ch <= u'9' or u'A' <= ch <= u'Z' or u'a' <= ch <= u'z'  \
+                    or ch in u'-_'):
+                raise EmitterError("invalid character %r in the anchor: %r"
+                        % (ch.encode('utf-8'), anchor.encode('utf-8')))
+        return anchor
+
+    def analyze_scalar(self, scalar):
+
+        # Empty scalar is a special case.
+        if not scalar:
+            return ScalarAnalysis(scalar=scalar, empty=True, multiline=False,
+                    allow_flow_plain=False, allow_block_plain=True,
+                    allow_single_quoted=True, allow_double_quoted=True,
+                    allow_block=False)
+
+        # Indicators and special characters.
+        block_indicators = False
+        flow_indicators = False
+        line_breaks = False
+        special_characters = False
+
+        # Important whitespace combinations.
+        leading_space = False
+        leading_break = False
+        trailing_space = False
+        trailing_break = False
+        break_space = False
+        space_break = False
+
+        # Check document indicators.
+        if scalar.startswith(u'---') or scalar.startswith(u'...'):
+            block_indicators = True
+            flow_indicators = True
+
+        # First character or preceded by a whitespace.
+        preceeded_by_whitespace = True
+
+        # Last character or followed by a whitespace.
+        followed_by_whitespace = (len(scalar) == 1 or
+                scalar[1] in u'\0 \t\r\n\x85\u2028\u2029')
+
+        # The previous character is a space.
+        previous_space = False
+
+        # The previous character is a break.
+        previous_break = False
+
+        index = 0
+        while index < len(scalar):
+            ch = scalar[index]
+
+            # Check for indicators.
+            if index == 0:
+                # Leading indicators are special characters.
+                if ch in u'#,[]{}&*!|>\'\"%@`': 
+                    flow_indicators = True
+                    block_indicators = True
+                if ch in u'?:':
+                    flow_indicators = True
+                    if followed_by_whitespace:
+                        block_indicators = True
+                if ch == u'-' and followed_by_whitespace:
+                    flow_indicators = True
+                    block_indicators = True
+            else:
+                # Some indicators cannot appear within a scalar as well.
+                if ch in u',?[]{}':
+                    flow_indicators = True
+                if ch == u':':
+                    flow_indicators = True
+                    if followed_by_whitespace:
+                        block_indicators = True
+                if ch == u'#' and preceeded_by_whitespace:
+                    flow_indicators = True
+                    block_indicators = True
+
+            # Check for line breaks, special, and unicode characters.
+            if ch in u'\n\x85\u2028\u2029':
+                line_breaks = True
+            if not (ch == u'\n' or u'\x20' <= ch <= u'\x7E'):
+                if (ch == u'\x85' or u'\xA0' <= ch <= u'\uD7FF'
+                        or u'\uE000' <= ch <= u'\uFFFD') and ch != u'\uFEFF':
+                    unicode_characters = True
+                    if not self.allow_unicode:
+                        special_characters = True
+                else:
+                    special_characters = True
+
+            # Detect important whitespace combinations.
+            if ch == u' ':
+                if index == 0:
+                    leading_space = True
+                if index == len(scalar)-1:
+                    trailing_space = True
+                if previous_break:
+                    break_space = True
+                previous_space = True
+                previous_break = False
+            elif ch in u'\n\x85\u2028\u2029':
+                if index == 0:
+                    leading_break = True
+                if index == len(scalar)-1:
+                    trailing_break = True
+                if previous_space:
+                    space_break = True
+                previous_space = False
+                previous_break = True
+            else:
+                previous_space = False
+                previous_break = False
+
+            # Prepare for the next character.
+            index += 1
+            preceeded_by_whitespace = (ch in u'\0 \t\r\n\x85\u2028\u2029')
+            followed_by_whitespace = (index+1 >= len(scalar) or
+                    scalar[index+1] in u'\0 \t\r\n\x85\u2028\u2029')
+
+        # Let's decide what styles are allowed.
+        allow_flow_plain = True
+        allow_block_plain = True
+        allow_single_quoted = True
+        allow_double_quoted = True
+        allow_block = True
+
+        # Leading and trailing whitespaces are bad for plain scalars.
+        if (leading_space or leading_break
+                or trailing_space or trailing_break):
+            allow_flow_plain = allow_block_plain = False
+
+        # We do not permit trailing spaces for block scalars.
+        if trailing_space:
+            allow_block = False
+
+        # Spaces at the beginning of a new line are only acceptable for block
+        # scalars.
+        if break_space:
+            allow_flow_plain = allow_block_plain = allow_single_quoted = False
+
+        # Spaces followed by breaks, as well as special character are only
+        # allowed for double quoted scalars.
+        if space_break or special_characters:
+            allow_flow_plain = allow_block_plain =  \
+            allow_single_quoted = allow_block = False
+
+        # Although the plain scalar writer supports breaks, we never emit
+        # multiline plain scalars.
+        if line_breaks:
+            allow_flow_plain = allow_block_plain = False
+
+        # Flow indicators are forbidden for flow plain scalars.
+        if flow_indicators:
+            allow_flow_plain = False
+
+        # Block indicators are forbidden for block plain scalars.
+        if block_indicators:
+            allow_block_plain = False
+
+        return ScalarAnalysis(scalar=scalar,
+                empty=False, multiline=line_breaks,
+                allow_flow_plain=allow_flow_plain,
+                allow_block_plain=allow_block_plain,
+                allow_single_quoted=allow_single_quoted,
+                allow_double_quoted=allow_double_quoted,
+                allow_block=allow_block)
+
+    # Writers.
+
+    def flush_stream(self):
+        if hasattr(self.stream, 'flush'):
+            self.stream.flush()
+
+    def write_stream_start(self):
+        # Write BOM if needed.
+        if self.encoding and self.encoding.startswith('utf-16'):
+            self.stream.write(u'\uFEFF'.encode(self.encoding))
+
+    def write_stream_end(self):
+        self.flush_stream()
+
+    def write_indicator(self, indicator, need_whitespace,
+            whitespace=False, indention=False):
+        if self.whitespace or not need_whitespace:
+            data = indicator
+        else:
+            data = u' '+indicator
+        self.whitespace = whitespace
+        self.indention = self.indention and indention
+        self.column += len(data)
+        self.open_ended = False
+        if self.encoding:
+            data = data.encode(self.encoding)
+        self.stream.write(data)
+
+    def write_indent(self):
+        indent = self.indent or 0
+        if not self.indention or self.column > indent   \
+                or (self.column == indent and not self.whitespace):
+            self.write_line_break()
+        if self.column < indent:
+            self.whitespace = True
+            data = u' '*(indent-self.column)
+            self.column = indent
+            if self.encoding:
+                data = data.encode(self.encoding)
+            self.stream.write(data)
+
+    def write_line_break(self, data=None):
+        if data is None:
+            data = self.best_line_break
+        self.whitespace = True
+        self.indention = True
+        self.line += 1
+        self.column = 0
+        if self.encoding:
+            data = data.encode(self.encoding)
+        self.stream.write(data)
+
+    def write_version_directive(self, version_text):
+        data = u'%%YAML %s' % version_text
+        if self.encoding:
+            data = data.encode(self.encoding)
+        self.stream.write(data)
+        self.write_line_break()
+
+    def write_tag_directive(self, handle_text, prefix_text):
+        data = u'%%TAG %s %s' % (handle_text, prefix_text)
+        if self.encoding:
+            data = data.encode(self.encoding)
+        self.stream.write(data)
+        self.write_line_break()
+
+    # Scalar streams.
+
+    def write_single_quoted(self, text, split=True):
+        self.write_indicator(u'\'', True)
+        spaces = False
+        breaks = False
+        start = end = 0
+        while end <= len(text):
+            ch = None
+            if end < len(text):
+                ch = text[end]
+            if spaces:
+                if ch is None or ch != u' ':
+                    if start+1 == end and self.column > self.best_width and split   \
+                            and start != 0 and end != len(text):
+                        self.write_indent()
+                    else:
+                        data = text[start:end]
+                        self.column += len(data)
+                        if self.encoding:
+                            data = data.encode(self.encoding)
+                        self.stream.write(data)
+                    start = end
+            elif breaks:
+                if ch is None or ch not in u'\n\x85\u2028\u2029':
+                    if text[start] == u'\n':
+                        self.write_line_break()
+                    for br in text[start:end]:
+                        if br == u'\n':
+                            self.write_line_break()
+                        else:
+                            self.write_line_break(br)
+                    self.write_indent()
+                    start = end
+            else:
+                if ch is None or ch in u' \n\x85\u2028\u2029' or ch == u'\'':
+                    if start < end:
+                        data = text[start:end]
+                        self.column += len(data)
+                        if self.encoding:
+                            data = data.encode(self.encoding)
+                        self.stream.write(data)
+                        start = end
+            if ch == u'\'':
+                data = u'\'\''
+                self.column += 2
+                if self.encoding:
+                    data = data.encode(self.encoding)
+                self.stream.write(data)
+                start = end + 1
+            if ch is not None:
+                spaces = (ch == u' ')
+                breaks = (ch in u'\n\x85\u2028\u2029')
+            end += 1
+        self.write_indicator(u'\'', False)
+
+    ESCAPE_REPLACEMENTS = {
+        u'\0':      u'0',
+        u'\x07':    u'a',
+        u'\x08':    u'b',
+        u'\x09':    u't',
+        u'\x0A':    u'n',
+        u'\x0B':    u'v',
+        u'\x0C':    u'f',
+        u'\x0D':    u'r',
+        u'\x1B':    u'e',
+        u'\"':      u'\"',
+        u'\\':      u'\\',
+        u'\x85':    u'N',
+        u'\xA0':    u'_',
+        u'\u2028':  u'L',
+        u'\u2029':  u'P',
+    }
+
+    def write_double_quoted(self, text, split=True):
+        self.write_indicator(u'"', True)
+        start = end = 0
+        while end <= len(text):
+            ch = None
+            if end < len(text):
+                ch = text[end]
+            if ch is None or ch in u'"\\\x85\u2028\u2029\uFEFF' \
+                    or not (u'\x20' <= ch <= u'\x7E'
+                        or (self.allow_unicode
+                            and (u'\xA0' <= ch <= u'\uD7FF'
+                                or u'\uE000' <= ch <= u'\uFFFD'))):
+                if start < end:
+                    data = text[start:end]
+                    self.column += len(data)
+                    if self.encoding:
+                        data = data.encode(self.encoding)
+                    self.stream.write(data)
+                    start = end
+                if ch is not None:
+                    if ch in self.ESCAPE_REPLACEMENTS:
+                        data = u'\\'+self.ESCAPE_REPLACEMENTS[ch]
+                    elif ch <= u'\xFF':
+                        data = u'\\x%02X' % ord(ch)
+                    elif ch <= u'\uFFFF':
+                        data = u'\\u%04X' % ord(ch)
+                    else:
+                        data = u'\\U%08X' % ord(ch)
+                    self.column += len(data)
+                    if self.encoding:
+                        data = data.encode(self.encoding)
+                    self.stream.write(data)
+                    start = end+1
+            if 0 < end < len(text)-1 and (ch == u' ' or start >= end)   \
+                    and self.column+(end-start) > self.best_width and split:
+                data = text[start:end]+u'\\'
+                if start < end:
+                    start = end
+                self.column += len(data)
+                if self.encoding:
+                    data = data.encode(self.encoding)
+                self.stream.write(data)
+                self.write_indent()
+                self.whitespace = False
+                self.indention = False
+                if text[start] == u' ':
+                    data = u'\\'
+                    self.column += len(data)
+                    if self.encoding:
+                        data = data.encode(self.encoding)
+                    self.stream.write(data)
+            end += 1
+        self.write_indicator(u'"', False)
+
+    def determine_block_hints(self, text):
+        hints = u''
+        if text:
+            if text[0] in u' \n\x85\u2028\u2029':
+                hints += unicode(self.best_indent)
+            if text[-1] not in u'\n\x85\u2028\u2029':
+                hints += u'-'
+            elif len(text) == 1 or text[-2] in u'\n\x85\u2028\u2029':
+                hints += u'+'
+        return hints
+
+    def write_folded(self, text):
+        hints = self.determine_block_hints(text)
+        self.write_indicator(u'>'+hints, True)
+        if hints[-1:] == u'+':
+            self.open_ended = True
+        self.write_line_break()
+        leading_space = True
+        spaces = False
+        breaks = True
+        start = end = 0
+        while end <= len(text):
+            ch = None
+            if end < len(text):
+                ch = text[end]
+            if breaks:
+                if ch is None or ch not in u'\n\x85\u2028\u2029':
+                    if not leading_space and ch is not None and ch != u' '  \
+                            and text[start] == u'\n':
+                        self.write_line_break()
+                    leading_space = (ch == u' ')
+                    for br in text[start:end]:
+                        if br == u'\n':
+                            self.write_line_break()
+                        else:
+                            self.write_line_break(br)
+                    if ch is not None:
+                        self.write_indent()
+                    start = end
+            elif spaces:
+                if ch != u' ':
+                    if start+1 == end and self.column > self.best_width:
+                        self.write_indent()
+                    else:
+                        data = text[start:end]
+                        self.column += len(data)
+                        if self.encoding:
+                            data = data.encode(self.encoding)
+                        self.stream.write(data)
+                    start = end
+            else:
+                if ch is None or ch in u' \n\x85\u2028\u2029':
+                    data = text[start:end]
+                    self.column += len(data)
+                    if self.encoding:
+                        data = data.encode(self.encoding)
+                    self.stream.write(data)
+                    if ch is None:
+                        self.write_line_break()
+                    start = end
+            if ch is not None:
+                breaks = (ch in u'\n\x85\u2028\u2029')
+                spaces = (ch == u' ')
+            end += 1
+
+    def write_literal(self, text):
+        hints = self.determine_block_hints(text)
+        self.write_indicator(u'|'+hints, True)
+        if hints[-1:] == u'+':
+            self.open_ended = True
+        self.write_line_break()
+        breaks = True
+        start = end = 0
+        while end <= len(text):
+            ch = None
+            if end < len(text):
+                ch = text[end]
+            if breaks:
+                if ch is None or ch not in u'\n\x85\u2028\u2029':
+                    for br in text[start:end]:
+                        if br == u'\n':
+                            self.write_line_break()
+                        else:
+                            self.write_line_break(br)
+                    if ch is not None:
+                        self.write_indent()
+                    start = end
+            else:
+                if ch is None or ch in u'\n\x85\u2028\u2029':
+                    data = text[start:end]
+                    if self.encoding:
+                        data = data.encode(self.encoding)
+                    self.stream.write(data)
+                    if ch is None:
+                        self.write_line_break()
+                    start = end
+            if ch is not None:
+                breaks = (ch in u'\n\x85\u2028\u2029')
+            end += 1
+
+    def write_plain(self, text, split=True):
+        if self.root_context:
+            self.open_ended = True
+        if not text:
+            return
+        if not self.whitespace:
+            data = u' '
+            self.column += len(data)
+            if self.encoding:
+                data = data.encode(self.encoding)
+            self.stream.write(data)
+        self.whitespace = False
+        self.indention = False
+        spaces = False
+        breaks = False
+        start = end = 0
+        while end <= len(text):
+            ch = None
+            if end < len(text):
+                ch = text[end]
+            if spaces:
+                if ch != u' ':
+                    if start+1 == end and self.column > self.best_width and split:
+                        self.write_indent()
+                        self.whitespace = False
+                        self.indention = False
+                    else:
+                        data = text[start:end]
+                        self.column += len(data)
+                        if self.encoding:
+                            data = data.encode(self.encoding)
+                        self.stream.write(data)
+                    start = end
+            elif breaks:
+                if ch not in u'\n\x85\u2028\u2029':
+                    if text[start] == u'\n':
+                        self.write_line_break()
+                    for br in text[start:end]:
+                        if br == u'\n':
+                            self.write_line_break()
+                        else:
+                            self.write_line_break(br)
+                    self.write_indent()
+                    self.whitespace = False
+                    self.indention = False
+                    start = end
+            else:
+                if ch is None or ch in u' \n\x85\u2028\u2029':
+                    data = text[start:end]
+                    self.column += len(data)
+                    if self.encoding:
+                        data = data.encode(self.encoding)
+                    self.stream.write(data)
+                    start = end
+            if ch is not None:
+                spaces = (ch == u' ')
+                breaks = (ch in u'\n\x85\u2028\u2029')
+            end += 1
+
diff --git a/tablib/packages/yaml/error.py b/tablib/packages/yaml/error.py
new file mode 100644
index 0000000..577686d
--- /dev/null
+++ b/tablib/packages/yaml/error.py
@@ -0,0 +1,75 @@
+
+__all__ = ['Mark', 'YAMLError', 'MarkedYAMLError']
+
+class Mark(object):
+
+    def __init__(self, name, index, line, column, buffer, pointer):
+        self.name = name
+        self.index = index
+        self.line = line
+        self.column = column
+        self.buffer = buffer
+        self.pointer = pointer
+
+    def get_snippet(self, indent=4, max_length=75):
+        if self.buffer is None:
+            return None
+        head = ''
+        start = self.pointer
+        while start > 0 and self.buffer[start-1] not in u'\0\r\n\x85\u2028\u2029':
+            start -= 1
+            if self.pointer-start > max_length/2-1:
+                head = ' ... '
+                start += 5
+                break
+        tail = ''
+        end = self.pointer
+        while end < len(self.buffer) and self.buffer[end] not in u'\0\r\n\x85\u2028\u2029':
+            end += 1
+            if end-self.pointer > max_length/2-1:
+                tail = ' ... '
+                end -= 5
+                break
+        snippet = self.buffer[start:end].encode('utf-8')
+        return ' '*indent + head + snippet + tail + '\n'  \
+                + ' '*(indent+self.pointer-start+len(head)) + '^'
+
+    def __str__(self):
+        snippet = self.get_snippet()
+        where = "  in \"%s\", line %d, column %d"   \
+                % (self.name, self.line+1, self.column+1)
+        if snippet is not None:
+            where += ":\n"+snippet
+        return where
+
+class YAMLError(Exception):
+    pass
+
+class MarkedYAMLError(YAMLError):
+
+    def __init__(self, context=None, context_mark=None,
+            problem=None, problem_mark=None, note=None):
+        self.context = context
+        self.context_mark = context_mark
+        self.problem = problem
+        self.problem_mark = problem_mark
+        self.note = note
+
+    def __str__(self):
+        lines = []
+        if self.context is not None:
+            lines.append(self.context)
+        if self.context_mark is not None  \
+            and (self.problem is None or self.problem_mark is None
+                    or self.context_mark.name != self.problem_mark.name
+                    or self.context_mark.line != self.problem_mark.line
+                    or self.context_mark.column != self.problem_mark.column):
+            lines.append(str(self.context_mark))
+        if self.problem is not None:
+            lines.append(self.problem)
+        if self.problem_mark is not None:
+            lines.append(str(self.problem_mark))
+        if self.note is not None:
+            lines.append(self.note)
+        return '\n'.join(lines)
+
diff --git a/tablib/packages/yaml/events.py b/tablib/packages/yaml/events.py
new file mode 100644
index 0000000..f79ad38
--- /dev/null
+++ b/tablib/packages/yaml/events.py
@@ -0,0 +1,86 @@
+
+# Abstract classes.
+
+class Event(object):
+    def __init__(self, start_mark=None, end_mark=None):
+        self.start_mark = start_mark
+        self.end_mark = end_mark
+    def __repr__(self):
+        attributes = [key for key in ['anchor', 'tag', 'implicit', 'value']
+                if hasattr(self, key)]
+        arguments = ', '.join(['%s=%r' % (key, getattr(self, key))
+                for key in attributes])
+        return '%s(%s)' % (self.__class__.__name__, arguments)
+
+class NodeEvent(Event):
+    def __init__(self, anchor, start_mark=None, end_mark=None):
+        self.anchor = anchor
+        self.start_mark = start_mark
+        self.end_mark = end_mark
+
+class CollectionStartEvent(NodeEvent):
+    def __init__(self, anchor, tag, implicit, start_mark=None, end_mark=None,
+            flow_style=None):
+        self.anchor = anchor
+        self.tag = tag
+        self.implicit = implicit
+        self.start_mark = start_mark
+        self.end_mark = end_mark
+        self.flow_style = flow_style
+
+class CollectionEndEvent(Event):
+    pass
+
+# Implementations.
+
+class StreamStartEvent(Event):
+    def __init__(self, start_mark=None, end_mark=None, encoding=None):
+        self.start_mark = start_mark
+        self.end_mark = end_mark
+        self.encoding = encoding
+
+class StreamEndEvent(Event):
+    pass
+
+class DocumentStartEvent(Event):
+    def __init__(self, start_mark=None, end_mark=None,
+            explicit=None, version=None, tags=None):
+        self.start_mark = start_mark
+        self.end_mark = end_mark
+        self.explicit = explicit
+        self.version = version
+        self.tags = tags
+
+class DocumentEndEvent(Event):
+    def __init__(self, start_mark=None, end_mark=None,
+            explicit=None):
+        self.start_mark = start_mark
+        self.end_mark = end_mark
+        self.explicit = explicit
+
+class AliasEvent(NodeEvent):
+    pass
+
+class ScalarEvent(NodeEvent):
+    def __init__(self, anchor, tag, implicit, value,
+            start_mark=None, end_mark=None, style=None):
+        self.anchor = anchor
+        self.tag = tag
+        self.implicit = implicit
+        self.value = value
+        self.start_mark = start_mark
+        self.end_mark = end_mark
+        self.style = style
+
+class SequenceStartEvent(CollectionStartEvent):
+    pass
+
+class SequenceEndEvent(CollectionEndEvent):
+    pass
+
+class MappingStartEvent(CollectionStartEvent):
+    pass
+
+class MappingEndEvent(CollectionEndEvent):
+    pass
+
diff --git a/tablib/packages/yaml/loader.py b/tablib/packages/yaml/loader.py
new file mode 100644
index 0000000..293ff46
--- /dev/null
+++ b/tablib/packages/yaml/loader.py
@@ -0,0 +1,40 @@
+
+__all__ = ['BaseLoader', 'SafeLoader', 'Loader']
+
+from reader import *
+from scanner import *
+from parser import *
+from composer import *
+from constructor import *
+from resolver import *
+
+class BaseLoader(Reader, Scanner, Parser, Composer, BaseConstructor, BaseResolver):
+
+    def __init__(self, stream):
+        Reader.__init__(self, stream)
+        Scanner.__init__(self)
+        Parser.__init__(self)
+        Composer.__init__(self)
+        BaseConstructor.__init__(self)
+        BaseResolver.__init__(self)
+
+class SafeLoader(Reader, Scanner, Parser, Composer, SafeConstructor, Resolver):
+
+    def __init__(self, stream):
+        Reader.__init__(self, stream)
+        Scanner.__init__(self)
+        Parser.__init__(self)
+        Composer.__init__(self)
+        SafeConstructor.__init__(self)
+        Resolver.__init__(self)
+
+class Loader(Reader, Scanner, Parser, Composer, Constructor, Resolver):
+
+    def __init__(self, stream):
+        Reader.__init__(self, stream)
+        Scanner.__init__(self)
+        Parser.__init__(self)
+        Composer.__init__(self)
+        Constructor.__init__(self)
+        Resolver.__init__(self)
+
diff --git a/tablib/packages/yaml/nodes.py b/tablib/packages/yaml/nodes.py
new file mode 100644
index 0000000..c4f070c
--- /dev/null
+++ b/tablib/packages/yaml/nodes.py
@@ -0,0 +1,49 @@
+
+class Node(object):
+    def __init__(self, tag, value, start_mark, end_mark):
+        self.tag = tag
+        self.value = value
+        self.start_mark = start_mark
+        self.end_mark = end_mark
+    def __repr__(self):
+        value = self.value
+        #if isinstance(value, list):
+        #    if len(value) == 0:
+        #        value = '<empty>'
+        #    elif len(value) == 1:
+        #        value = '<1 item>'
+        #    else:
+        #        value = '<%d items>' % len(value)
+        #else:
+        #    if len(value) > 75:
+        #        value = repr(value[:70]+u' ... ')
+        #    else:
+        #        value = repr(value)
+        value = repr(value)
+        return '%s(tag=%r, value=%s)' % (self.__class__.__name__, self.tag, value)
+
+class ScalarNode(Node):
+    id = 'scalar'
+    def __init__(self, tag, value,
+            start_mark=None, end_mark=None, style=None):
+        self.tag = tag
+        self.value = value
+        self.start_mark = start_mark
+        self.end_mark = end_mark
+        self.style = style
+
+class CollectionNode(Node):
+    def __init__(self, tag, value,
+            start_mark=None, end_mark=None, flow_style=None):
+        self.tag = tag
+        self.value = value
+        self.start_mark = start_mark
+        self.end_mark = end_mark
+        self.flow_style = flow_style
+
+class SequenceNode(CollectionNode):
+    id = 'sequence'
+
+class MappingNode(CollectionNode):
+    id = 'mapping'
+
diff --git a/tablib/packages/yaml/parser.py b/tablib/packages/yaml/parser.py
new file mode 100644
index 0000000..b6a7416
--- /dev/null
+++ b/tablib/packages/yaml/parser.py
@@ -0,0 +1,584 @@
+
+# The following YAML grammar is LL(1) and is parsed by a recursive descent
+# parser.
+#
+# stream            ::= STREAM-START implicit_document? explicit_document* STREAM-END
+# implicit_document ::= block_node DOCUMENT-END*
+# explicit_document ::= DIRECTIVE* DOCUMENT-START block_node? DOCUMENT-END*
+# block_node_or_indentless_sequence ::=
+#                       ALIAS
+#                       | properties (block_content | indentless_block_sequence)?
+#                       | block_content
+#                       | indentless_block_sequence
+# block_node        ::= ALIAS
+#                       | properties block_content?
+#                       | block_content
+# flow_node         ::= ALIAS
+#                       | properties flow_content?
+#                       | flow_content
+# properties        ::= TAG ANCHOR? | ANCHOR TAG?
+# block_content     ::= block_collection | flow_collection | SCALAR
+# flow_content      ::= flow_collection | SCALAR
+# block_collection  ::= block_sequence | block_mapping
+# flow_collection   ::= flow_sequence | flow_mapping
+# block_sequence    ::= BLOCK-SEQUENCE-START (BLOCK-ENTRY block_node?)* BLOCK-END
+# indentless_sequence   ::= (BLOCK-ENTRY block_node?)+
+# block_mapping     ::= BLOCK-MAPPING_START
+#                       ((KEY block_node_or_indentless_sequence?)?
+#                       (VALUE block_node_or_indentless_sequence?)?)*
+#                       BLOCK-END
+# flow_sequence     ::= FLOW-SEQUENCE-START
+#                       (flow_sequence_entry FLOW-ENTRY)*
+#                       flow_sequence_entry?
+#                       FLOW-SEQUENCE-END
+# flow_sequence_entry   ::= flow_node | KEY flow_node? (VALUE flow_node?)?
+# flow_mapping      ::= FLOW-MAPPING-START
+#                       (flow_mapping_entry FLOW-ENTRY)*
+#                       flow_mapping_entry?
+#                       FLOW-MAPPING-END
+# flow_mapping_entry    ::= flow_node | KEY flow_node? (VALUE flow_node?)?
+#
+# FIRST sets:
+#
+# stream: { STREAM-START }
+# explicit_document: { DIRECTIVE DOCUMENT-START }
+# implicit_document: FIRST(block_node)
+# block_node: { ALIAS TAG ANCHOR SCALAR BLOCK-SEQUENCE-START BLOCK-MAPPING-START FLOW-SEQUENCE-START FLOW-MAPPING-START }
+# flow_node: { ALIAS ANCHOR TAG SCALAR FLOW-SEQUENCE-START FLOW-MAPPING-START }
+# block_content: { BLOCK-SEQUENCE-START BLOCK-MAPPING-START FLOW-SEQUENCE-START FLOW-MAPPING-START SCALAR }
+# flow_content: { FLOW-SEQUENCE-START FLOW-MAPPING-START SCALAR }
+# block_collection: { BLOCK-SEQUENCE-START BLOCK-MAPPING-START }
+# flow_collection: { FLOW-SEQUENCE-START FLOW-MAPPING-START }
+# block_sequence: { BLOCK-SEQUENCE-START }
+# block_mapping: { BLOCK-MAPPING-START }
+# block_node_or_indentless_sequence: { ALIAS ANCHOR TAG SCALAR BLOCK-SEQUENCE-START BLOCK-MAPPING-START FLOW-SEQUENCE-START FLOW-MAPPING-START BLOCK-ENTRY }
+# indentless_sequence: { ENTRY }
+# flow_collection: { FLOW-SEQUENCE-START FLOW-MAPPING-START }
+# flow_sequence: { FLOW-SEQUENCE-START }
+# flow_mapping: { FLOW-MAPPING-START }
+# flow_sequence_entry: { ALIAS ANCHOR TAG SCALAR FLOW-SEQUENCE-START FLOW-MAPPING-START KEY }
+# flow_mapping_entry: { ALIAS ANCHOR TAG SCALAR FLOW-SEQUENCE-START FLOW-MAPPING-START KEY }
+
+__all__ = ['Parser', 'ParserError']
+
+from error import MarkedYAMLError
+from tokens import *
+from events import *
+from scanner import *
+
+class ParserError(MarkedYAMLError):
+    pass
+
+class Parser(object):
+    # Since writing a recursive-descendant parser is a straightforward task, we
+    # do not give many comments here.
+
+    DEFAULT_TAGS = {
+        u'!':   u'!',
+        u'!!':  u'tag:yaml.org,2002:',
+    }
+
+    def __init__(self):
+        self.current_event = None
+        self.yaml_version = None
+        self.tag_handles = {}
+        self.states = []
+        self.marks = []
+        self.state = self.parse_stream_start
+
+    def check_event(self, *choices):
+        # Check the type of the next event.
+        if self.current_event is None:
+            if self.state:
+                self.current_event = self.state()
+        if self.current_event is not None:
+            if not choices:
+                return True
+            for choice in choices:
+                if isinstance(self.current_event, choice):
+                    return True
+        return False
+
+    def peek_event(self):
+        # Get the next event.
+        if self.current_event is None:
+            if self.state:
+                self.current_event = self.state()
+        return self.current_event
+
+    def get_event(self):
+        # Get the next event and proceed further.
+        if self.current_event is None:
+            if self.state:
+                self.current_event = self.state()
+        value = self.current_event
+        self.current_event = None
+        return value
+
+    # stream    ::= STREAM-START implicit_document? explicit_document* STREAM-END
+    # implicit_document ::= block_node DOCUMENT-END*
+    # explicit_document ::= DIRECTIVE* DOCUMENT-START block_node? DOCUMENT-END*
+
+    def parse_stream_start(self):
+
+        # Parse the stream start.
+        token = self.get_token()
+        event = StreamStartEvent(token.start_mark, token.end_mark,
+                encoding=token.encoding)
+
+        # Prepare the next state.
+        self.state = self.parse_implicit_document_start
+
+        return event
+
+    def parse_implicit_document_start(self):
+
+        # Parse an implicit document.
+        if not self.check_token(DirectiveToken, DocumentStartToken,
+                StreamEndToken):
+            self.tag_handles = self.DEFAULT_TAGS
+            token = self.peek_token()
+            start_mark = end_mark = token.start_mark
+            event = DocumentStartEvent(start_mark, end_mark,
+                    explicit=False)
+
+            # Prepare the next state.
+            self.states.append(self.parse_document_end)
+            self.state = self.parse_block_node
+
+            return event
+
+        else:
+            return self.parse_document_start()
+
+    def parse_document_start(self):
+
+        # Parse any extra document end indicators.
+        while self.check_token(DocumentEndToken):
+            self.get_token()
+
+        # Parse an explicit document.
+        if not self.check_token(StreamEndToken):
+            token = self.peek_token()
+            start_mark = token.start_mark
+            version, tags = self.process_directives()
+            if not self.check_token(DocumentStartToken):
+                raise ParserError(None, None,
+                        "expected '<document start>', but found %r"
+                        % self.peek_token().id,
+                        self.peek_token().start_mark)
+            token = self.get_token()
+            end_mark = token.end_mark
+            event = DocumentStartEvent(start_mark, end_mark,
+                    explicit=True, version=version, tags=tags)
+            self.states.append(self.parse_document_end)
+            self.state = self.parse_document_content
+        else:
+            # Parse the end of the stream.
+            token = self.get_token()
+            event = StreamEndEvent(token.start_mark, token.end_mark)
+            assert not self.states
+            assert not self.marks
+            self.state = None
+        return event
+
+    def parse_document_end(self):
+
+        # Parse the document end.
+        token = self.peek_token()
+        start_mark = end_mark = token.start_mark
+        explicit = False
+        if self.check_token(DocumentEndToken):
+            token = self.get_token()
+            end_mark = token.end_mark
+            explicit = True
+        event = DocumentEndEvent(start_mark, end_mark,
+                explicit=explicit)
+
+        # Prepare the next state.
+        self.state = self.parse_document_start
+
+        return event
+
+    def parse_document_content(self):
+        if self.check_token(DirectiveToken,
+                DocumentStartToken, DocumentEndToken, StreamEndToken):
+            event = self.process_empty_scalar(self.peek_token().start_mark)
+            self.state = self.states.pop()
+            return event
+        else:
+            return self.parse_block_node()
+
+    def process_directives(self):
+        self.yaml_version = None
+        self.tag_handles = {}
+        while self.check_token(DirectiveToken):
+            token = self.get_token()
+            if token.name == u'YAML':
+                if self.yaml_version is not None:
+                    raise ParserError(None, None,
+                            "found duplicate YAML directive", token.start_mark)
+                major, minor = token.value
+                if major != 1:
+                    raise ParserError(None, None,
+                            "found incompatible YAML document (version 1.* is required)",
+                            token.start_mark)
+                self.yaml_version = token.value
+            elif token.name == u'TAG':
+                handle, prefix = token.value
+                if handle in self.tag_handles:
+                    raise ParserError(None, None,
+                            "duplicate tag handle %r" % handle.encode('utf-8'),
+                            token.start_mark)
+                self.tag_handles[handle] = prefix
+        if self.tag_handles:
+            value = self.yaml_version, self.tag_handles.copy()
+        else:
+            value = self.yaml_version, None
+        for key in self.DEFAULT_TAGS:
+            if key not in self.tag_handles:
+                self.tag_handles[key] = self.DEFAULT_TAGS[key]
+        return value
+
+    # block_node_or_indentless_sequence ::= ALIAS
+    #               | properties (block_content | indentless_block_sequence)?
+    #               | block_content
+    #               | indentless_block_sequence
+    # block_node    ::= ALIAS
+    #                   | properties block_content?
+    #                   | block_content
+    # flow_node     ::= ALIAS
+    #                   | properties flow_content?
+    #                   | flow_content
+    # properties    ::= TAG ANCHOR? | ANCHOR TAG?
+    # block_content     ::= block_collection | flow_collection | SCALAR
+    # flow_content      ::= flow_collection | SCALAR
+    # block_collection  ::= block_sequence | block_mapping
+    # flow_collection   ::= flow_sequence | flow_mapping
+
+    def parse_block_node(self):
+        return self.parse_node(block=True)
+
+    def parse_flow_node(self):
+        return self.parse_node()
+
+    def parse_block_node_or_indentless_sequence(self):
+        return self.parse_node(block=True, indentless_sequence=True)
+
+    def parse_node(self, block=False, indentless_sequence=False):
+        if self.check_token(AliasToken):
+            token = self.get_token()
+            event = AliasEvent(token.value, token.start_mark, token.end_mark)
+            self.state = self.states.pop()
+        else:
+            anchor = None
+            tag = None
+            start_mark = end_mark = tag_mark = None
+            if self.check_token(AnchorToken):
+                token = self.get_token()
+                start_mark = token.start_mark
+                end_mark = token.end_mark
+                anchor = token.value
+                if self.check_token(TagToken):
+                    token = self.get_token()
+                    tag_mark = token.start_mark
+                    end_mark = token.end_mark
+                    tag = token.value
+            elif self.check_token(TagToken):
+                token = self.get_token()
+                start_mark = tag_mark = token.start_mark
+                end_mark = token.end_mark
+                tag = token.value
+                if self.check_token(AnchorToken):
+                    token = self.get_token()
+                    end_mark = token.end_mark
+                    anchor = token.value
+            if tag is not None:
+                handle, suffix = tag
+                if handle is not None:
+                    if handle not in self.tag_handles:
+                        raise ParserError("while parsing a node", start_mark,
+                                "found undefined tag handle %r" % handle.encode('utf-8'),
+                                tag_mark)
+                    tag = self.tag_handles[handle]+suffix
+                else:
+                    tag = suffix
+            #if tag == u'!':
+            #    raise ParserError("while parsing a node", start_mark,
+            #            "found non-specific tag '!'", tag_mark,
+            #            "Please check 'http://pyyaml.org/wiki/YAMLNonSpecificTag' and share your opinion.")
+            if start_mark is None:
+                start_mark = end_mark = self.peek_token().start_mark
+            event = None
+            implicit = (tag is None or tag == u'!')
+            if indentless_sequence and self.check_token(BlockEntryToken):
+                end_mark = self.peek_token().end_mark
+                event = SequenceStartEvent(anchor, tag, implicit,
+                        start_mark, end_mark)
+                self.state = self.parse_indentless_sequence_entry
+            else:
+                if self.check_token(ScalarToken):
+                    token = self.get_token()
+                    end_mark = token.end_mark
+                    if (token.plain and tag is None) or tag == u'!':
+                        implicit = (True, False)
+                    elif tag is None:
+                        implicit = (False, True)
+                    else:
+                        implicit = (False, False)
+                    event = ScalarEvent(anchor, tag, implicit, token.value,
+                            start_mark, end_mark, style=token.style)
+                    self.state = self.states.pop()
+                elif self.check_token(FlowSequenceStartToken):
+                    end_mark = self.peek_token().end_mark
+                    event = SequenceStartEvent(anchor, tag, implicit,
+                            start_mark, end_mark, flow_style=True)
+                    self.state = self.parse_flow_sequence_first_entry
+                elif self.check_token(FlowMappingStartToken):
+                    end_mark = self.peek_token().end_mark
+                    event = MappingStartEvent(anchor, tag, implicit,
+                            start_mark, end_mark, flow_style=True)
+                    self.state = self.parse_flow_mapping_first_key
+                elif block and self.check_token(BlockSequenceStartToken):
+                    end_mark = self.peek_token().start_mark
+                    event = SequenceStartEvent(anchor, tag, implicit,
+                            start_mark, end_mark, flow_style=False)
+                    self.state = self.parse_block_sequence_first_entry
+                elif block and self.check_token(BlockMappingStartToken):
+                    end_mark = self.peek_token().start_mark
+                    event = MappingStartEvent(anchor, tag, implicit,
+                            start_mark, end_mark, flow_style=False)
+                    self.state = self.parse_block_mapping_first_key
+                elif anchor is not None or tag is not None:
+                    # Empty scalars are allowed even if a tag or an anchor is
+                    # specified.
+                    event = ScalarEvent(anchor, tag, (implicit, False), u'',
+                            start_mark, end_mark)
+                    self.state = self.states.pop()
+                else:
+                    if block:
+                        node = 'block'
+                    else:
+                        node = 'flow'
+                    token = self.peek_token()
+                    raise ParserError("while parsing a %s node" % node, start_mark,
+                            "expected the node content, but found %r" % token.id,
+                            token.start_mark)
+        return event
+
+    # block_sequence ::= BLOCK-SEQUENCE-START (BLOCK-ENTRY block_node?)* BLOCK-END
+
+    def parse_block_sequence_first_entry(self):
+        token = self.get_token()
+        self.marks.append(token.start_mark)
+        return self.parse_block_sequence_entry()
+
+    def parse_block_sequence_entry(self):
+        if self.check_token(BlockEntryToken):
+            token = self.get_token()
+            if not self.check_token(BlockEntryToken, BlockEndToken):
+                self.states.append(self.parse_block_sequence_entry)
+                return self.parse_block_node()
+            else:
+                self.state = self.parse_block_sequence_entry
+                return self.process_empty_scalar(token.end_mark)
+        if not self.check_token(BlockEndToken):
+            token = self.peek_token()
+            raise ParserError("while parsing a block collection", self.marks[-1],
+                    "expected <block end>, but found %r" % token.id, token.start_mark)
+        token = self.get_token()
+        event = SequenceEndEvent(token.start_mark, token.end_mark)
+        self.state = self.states.pop()
+        self.marks.pop()
+        return event
+
+    # indentless_sequence ::= (BLOCK-ENTRY block_node?)+
+
+    def parse_indentless_sequence_entry(self):
+        if self.check_token(BlockEntryToken):
+            token = self.get_token()
+            if not self.check_token(BlockEntryToken,
+                    KeyToken, ValueToken, BlockEndToken):
+                self.states.append(self.parse_indentless_sequence_entry)
+                return self.parse_block_node()
+            else:
+                self.state = self.parse_indentless_sequence_entry
+                return self.process_empty_scalar(token.end_mark)
+        token = self.peek_token()
+        event = SequenceEndEvent(token.start_mark, token.start_mark)
+        self.state = self.states.pop()
+        return event
+
+    # block_mapping     ::= BLOCK-MAPPING_START
+    #                       ((KEY block_node_or_indentless_sequence?)?
+    #                       (VALUE block_node_or_indentless_sequence?)?)*
+    #                       BLOCK-END
+
+    def parse_block_mapping_first_key(self):
+        token = self.get_token()
+        self.marks.append(token.start_mark)
+        return self.parse_block_mapping_key()
+
+    def parse_block_mapping_key(self):
+        if self.check_token(KeyToken):
+            token = self.get_token()
+            if not self.check_token(KeyToken, ValueToken, BlockEndToken):
+                self.states.append(self.parse_block_mapping_value)
+                return self.parse_block_node_or_indentless_sequence()
+            else:
+                self.state = self.parse_block_mapping_value
+                return self.process_empty_scalar(token.end_mark)
+        if not self.check_token(BlockEndToken):
+            token = self.peek_token()
+            raise ParserError("while parsing a block mapping", self.marks[-1],
+                    "expected <block end>, but found %r" % token.id, token.start_mark)
+        token = self.get_token()
+        event = MappingEndEvent(token.start_mark, token.end_mark)
+        self.state = self.states.pop()
+        self.marks.pop()
+        return event
+
+    def parse_block_mapping_value(self):
+        if self.check_token(ValueToken):
+            token = self.get_token()
+            if not self.check_token(KeyToken, ValueToken, BlockEndToken):
+                self.states.append(self.parse_block_mapping_key)
+                return self.parse_block_node_or_indentless_sequence()
+            else:
+                self.state = self.parse_block_mapping_key
+                return self.process_empty_scalar(token.end_mark)
+        else:
+            self.state = self.parse_block_mapping_key
+            token = self.peek_token()
+            return self.process_empty_scalar(token.start_mark)
+
+    # flow_sequence     ::= FLOW-SEQUENCE-START
+    #                       (flow_sequence_entry FLOW-ENTRY)*
+    #                       flow_sequence_entry?
+    #                       FLOW-SEQUENCE-END
+    # flow_sequence_entry   ::= flow_node | KEY flow_node? (VALUE flow_node?)?
+    #
+    # Note that while production rules for both flow_sequence_entry and
+    # flow_mapping_entry are equal, their interpretations are different.
+    # For `flow_sequence_entry`, the part `KEY flow_node? (VALUE flow_node?)?`
+    # generate an inline mapping (set syntax).
+
+    def parse_flow_sequence_first_entry(self):
+        token = self.get_token()
+        self.marks.append(token.start_mark)
+        return self.parse_flow_sequence_entry(first=True)
+
+    def parse_flow_sequence_entry(self, first=False):
+        if not self.check_token(FlowSequenceEndToken):
+            if not first:
+                if self.check_token(FlowEntryToken):
+                    self.get_token()
+                else:
+                    token = self.peek_token()
+                    raise ParserError("while parsing a flow sequence", self.marks[-1],
+                            "expected ',' or ']', but got %r" % token.id, token.start_mark)
+            
+            if self.check_token(KeyToken):
+                token = self.peek_token()
+                event = MappingStartEvent(None, None, True,
+                        token.start_mark, token.end_mark,
+                        flow_style=True)
+                self.state = self.parse_flow_sequence_entry_mapping_key
+                return event
+            elif not self.check_token(FlowSequenceEndToken):
+                self.states.append(self.parse_flow_sequence_entry)
+                return self.parse_flow_node()
+        token = self.get_token()
+        event = SequenceEndEvent(token.start_mark, token.end_mark)
+        self.state = self.states.pop()
+        self.marks.pop()
+        return event
+
+    def parse_flow_sequence_entry_mapping_key(self):
+        token = self.get_token()
+        if not self.check_token(ValueToken,
+                FlowEntryToken, FlowSequenceEndToken):
+            self.states.append(self.parse_flow_sequence_entry_mapping_value)
+            return self.parse_flow_node()
+        else:
+            self.state = self.parse_flow_sequence_entry_mapping_value
+            return self.process_empty_scalar(token.end_mark)
+
+    def parse_flow_sequence_entry_mapping_value(self):
+        if self.check_token(ValueToken):
+            token = self.get_token()
+            if not self.check_token(FlowEntryToken, FlowSequenceEndToken):
+                self.states.append(self.parse_flow_sequence_entry_mapping_end)
+                return self.parse_flow_node()
+            else:
+                self.state = self.parse_flow_sequence_entry_mapping_end
+                return self.process_empty_scalar(token.end_mark)
+        else:
+            self.state = self.parse_flow_sequence_entry_mapping_end
+            token = self.peek_token()
+            return self.process_empty_scalar(token.start_mark)
+
+    def parse_flow_sequence_entry_mapping_end(self):
+        self.state = self.parse_flow_sequence_entry
+        token = self.peek_token()
+        return MappingEndEvent(token.start_mark, token.start_mark)
+
+    # flow_mapping  ::= FLOW-MAPPING-START
+    #                   (flow_mapping_entry FLOW-ENTRY)*
+    #                   flow_mapping_entry?
+    #                   FLOW-MAPPING-END
+    # flow_mapping_entry    ::= flow_node | KEY flow_node? (VALUE flow_node?)?
+
+    def parse_flow_mapping_first_key(self):
+        token = self.get_token()
+        self.marks.append(token.start_mark)
+        return self.parse_flow_mapping_key(first=True)
+
+    def parse_flow_mapping_key(self, first=False):
+        if not self.check_token(FlowMappingEndToken):
+            if not first:
+                if self.check_token(FlowEntryToken):
+                    self.get_token()
+                else:
+                    token = self.peek_token()
+                    raise ParserError("while parsing a flow mapping", self.marks[-1],
+                            "expected ',' or '}', but got %r" % token.id, token.start_mark)
+            if self.check_token(KeyToken):
+                token = self.get_token()
+                if not self.check_token(ValueToken,
+                        FlowEntryToken, FlowMappingEndToken):
+                    self.states.append(self.parse_flow_mapping_value)
+                    return self.parse_flow_node()
+                else:
+                    self.state = self.parse_flow_mapping_value
+                    return self.process_empty_scalar(token.end_mark)
+            elif not self.check_token(FlowMappingEndToken):
+                self.states.append(self.parse_flow_mapping_empty_value)
+                return self.parse_flow_node()
+        token = self.get_token()
+        event = MappingEndEvent(token.start_mark, token.end_mark)
+        self.state = self.states.pop()
+        self.marks.pop()
+        return event
+
+    def parse_flow_mapping_value(self):
+        if self.check_token(ValueToken):
+            token = self.get_token()
+            if not self.check_token(FlowEntryToken, FlowMappingEndToken):
+                self.states.append(self.parse_flow_mapping_key)
+                return self.parse_flow_node()
+            else:
+                self.state = self.parse_flow_mapping_key
+                return self.process_empty_scalar(token.end_mark)
+        else:
+            self.state = self.parse_flow_mapping_key
+            token = self.peek_token()
+            return self.process_empty_scalar(token.start_mark)
+
+    def parse_flow_mapping_empty_value(self):
+        self.state = self.parse_flow_mapping_key
+        return self.process_empty_scalar(self.peek_token().start_mark)
+
+    def process_empty_scalar(self, mark):
+        return ScalarEvent(None, None, (True, False), u'', mark, mark)
+
diff --git a/tablib/packages/yaml/reader.py b/tablib/packages/yaml/reader.py
new file mode 100644
index 0000000..1e7a4db
--- /dev/null
+++ b/tablib/packages/yaml/reader.py
@@ -0,0 +1,225 @@
+# This module contains abstractions for the input stream. You don't have to
+# looks further, there are no pretty code.
+#
+# We define two classes here.
+#
+#   Mark(source, line, column)
+# It's just a record and its only use is producing nice error messages.
+# Parser does not use it for any other purposes.
+#
+#   Reader(source, data)
+# Reader determines the encoding of `data` and converts it to unicode.
+# Reader provides the following methods and attributes:
+#   reader.peek(length=1) - return the next `length` characters
+#   reader.forward(length=1) - move the current position to `length` characters.
+#   reader.index - the number of the current character.
+#   reader.line, stream.column - the line and the column of the current character.
+
+__all__ = ['Reader', 'ReaderError']
+
+from error import YAMLError, Mark
+
+import codecs, re
+
+# Unfortunately, codec functions in Python 2.3 does not support the `finish`
+# arguments, so we have to write our own wrappers.
+
+try:
+    codecs.utf_8_decode('', 'strict', False)
+    from codecs import utf_8_decode, utf_16_le_decode, utf_16_be_decode
+
+except TypeError:
+
+    def utf_16_le_decode(data, errors, finish=False):
+        if not finish and len(data) % 2 == 1:
+            data = data[:-1]
+        return codecs.utf_16_le_decode(data, errors)
+
+    def utf_16_be_decode(data, errors, finish=False):
+        if not finish and len(data) % 2 == 1:
+            data = data[:-1]
+        return codecs.utf_16_be_decode(data, errors)
+
+    def utf_8_decode(data, errors, finish=False):
+        if not finish:
+            # We are trying to remove a possible incomplete multibyte character
+            # from the suffix of the data.
+            # The first byte of a multi-byte sequence is in the range 0xc0 to 0xfd.
+            # All further bytes are in the range 0x80 to 0xbf.
+            # UTF-8 encoded UCS characters may be up to six bytes long.
+            count = 0
+            while count < 5 and count < len(data)   \
+                    and '\x80' <= data[-count-1] <= '\xBF':
+                count -= 1
+            if count < 5 and count < len(data)  \
+                    and '\xC0' <= data[-count-1] <= '\xFD':
+                data = data[:-count-1]
+        return codecs.utf_8_decode(data, errors)
+
+class ReaderError(YAMLError):
+
+    def __init__(self, name, position, character, encoding, reason):
+        self.name = name
+        self.character = character
+        self.position = position
+        self.encoding = encoding
+        self.reason = reason
+
+    def __str__(self):
+        if isinstance(self.character, str):
+            return "'%s' codec can't decode byte #x%02x: %s\n"  \
+                    "  in \"%s\", position %d"    \
+                    % (self.encoding, ord(self.character), self.reason,
+                            self.name, self.position)
+        else:
+            return "unacceptable character #x%04x: %s\n"    \
+                    "  in \"%s\", position %d"    \
+                    % (self.character, self.reason,
+                            self.name, self.position)
+
+class Reader(object):
+    # Reader:
+    # - determines the data encoding and converts it to unicode,
+    # - checks if characters are in allowed range,
+    # - adds '\0' to the end.
+
+    # Reader accepts
+    #  - a `str` object,
+    #  - a `unicode` object,
+    #  - a file-like object with its `read` method returning `str`,
+    #  - a file-like object with its `read` method returning `unicode`.
+
+    # Yeah, it's ugly and slow.
+
+    def __init__(self, stream):
+        self.name = None
+        self.stream = None
+        self.stream_pointer = 0
+        self.eof = True
+        self.buffer = u''
+        self.pointer = 0
+        self.raw_buffer = None
+        self.raw_decode = None
+        self.encoding = None
+        self.index = 0
+        self.line = 0
+        self.column = 0
+        if isinstance(stream, unicode):
+            self.name = "<unicode string>"
+            self.check_printable(stream)
+            self.buffer = stream+u'\0'
+        elif isinstance(stream, str):
+            self.name = "<string>"
+            self.raw_buffer = stream
+            self.determine_encoding()
+        else:
+            self.stream = stream
+            self.name = getattr(stream, 'name', "<file>")
+            self.eof = False
+            self.raw_buffer = ''
+            self.determine_encoding()
+
+    def peek(self, index=0):
+        try:
+            return self.buffer[self.pointer+index]
+        except IndexError:
+            self.update(index+1)
+            return self.buffer[self.pointer+index]
+
+    def prefix(self, length=1):
+        if self.pointer+length >= len(self.buffer):
+            self.update(length)
+        return self.buffer[self.pointer:self.pointer+length]
+
+    def forward(self, length=1):
+        if self.pointer+length+1 >= len(self.buffer):
+            self.update(length+1)
+        while length:
+            ch = self.buffer[self.pointer]
+            self.pointer += 1
+            self.index += 1
+            if ch in u'\n\x85\u2028\u2029'  \
+                    or (ch == u'\r' and self.buffer[self.pointer] != u'\n'):
+                self.line += 1
+                self.column = 0
+            elif ch != u'\uFEFF':
+                self.column += 1
+            length -= 1
+
+    def get_mark(self):
+        if self.stream is None:
+            return Mark(self.name, self.index, self.line, self.column,
+                    self.buffer, self.pointer)
+        else:
+            return Mark(self.name, self.index, self.line, self.column,
+                    None, None)
+
+    def determine_encoding(self):
+        while not self.eof and len(self.raw_buffer) < 2:
+            self.update_raw()
+        if not isinstance(self.raw_buffer, unicode):
+            if self.raw_buffer.startswith(codecs.BOM_UTF16_LE):
+                self.raw_decode = utf_16_le_decode
+                self.encoding = 'utf-16-le'
+            elif self.raw_buffer.startswith(codecs.BOM_UTF16_BE):
+                self.raw_decode = utf_16_be_decode
+                self.encoding = 'utf-16-be'
+            else:
+                self.raw_decode = utf_8_decode
+                self.encoding = 'utf-8'
+        self.update(1)
+
+    NON_PRINTABLE = re.compile(u'[^\x09\x0A\x0D\x20-\x7E\x85\xA0-\uD7FF\uE000-\uFFFD]')
+    def check_printable(self, data):
+        match = self.NON_PRINTABLE.search(data)
+        if match:
+            character = match.group()
+            position = self.index+(len(self.buffer)-self.pointer)+match.start()
+            raise ReaderError(self.name, position, ord(character),
+                    'unicode', "special characters are not allowed")
+
+    def update(self, length):
+        if self.raw_buffer is None:
+            return
+        self.buffer = self.buffer[self.pointer:]
+        self.pointer = 0
+        while len(self.buffer) < length:
+            if not self.eof:
+                self.update_raw()
+            if self.raw_decode is not None:
+                try:
+                    data, converted = self.raw_decode(self.raw_buffer,
+                            'strict', self.eof)
+                except UnicodeDecodeError, exc:
+                    character = exc.object[exc.start]
+                    if self.stream is not None:
+                        position = self.stream_pointer-len(self.raw_buffer)+exc.start
+                    else:
+                        position = exc.start
+                    raise ReaderError(self.name, position, character,
+                            exc.encoding, exc.reason)
+            else:
+                data = self.raw_buffer
+                converted = len(data)
+            self.check_printable(data)
+            self.buffer += data
+            self.raw_buffer = self.raw_buffer[converted:]
+            if self.eof:
+                self.buffer += u'\0'
+                self.raw_buffer = None
+                break
+
+    def update_raw(self, size=1024):
+        data = self.stream.read(size)
+        if data:
+            self.raw_buffer += data
+            self.stream_pointer += len(data)
+        else:
+            self.eof = True
+
+#try:
+#    import psyco
+#    psyco.bind(Reader)
+#except ImportError:
+#    pass
+
diff --git a/tablib/packages/yaml/representer.py b/tablib/packages/yaml/representer.py
new file mode 100644
index 0000000..f5606ec
--- /dev/null
+++ b/tablib/packages/yaml/representer.py
@@ -0,0 +1,489 @@
+
+__all__ = ['BaseRepresenter', 'SafeRepresenter', 'Representer',
+    'RepresenterError']
+
+from error import *
+from nodes import *
+
+import datetime
+
+try:
+    set
+except NameError:
+    from sets import Set as set
+
+import sys, copy_reg, types
+
+class RepresenterError(YAMLError):
+    pass
+
+class BaseRepresenter(object):
+
+    yaml_representers = {}
+    yaml_multi_representers = {}
+
+    def __init__(self, default_style=None, default_flow_style=None):
+        self.default_style = default_style
+        self.default_flow_style = default_flow_style
+        self.represented_objects = {}
+        self.object_keeper = []
+        self.alias_key = None
+
+    def represent(self, data):
+        node = self.represent_data(data)
+        self.serialize(node)
+        self.represented_objects = {}
+        self.object_keeper = []
+        self.alias_key = None
+
+    def get_classobj_bases(self, cls):
+        bases = [cls]
+        for base in cls.__bases__:
+            bases.extend(self.get_classobj_bases(base))
+        return bases
+
+    def represent_data(self, data):
+        if self.ignore_aliases(data):
+            self.alias_key = None
+        else:
+            self.alias_key = id(data)
+        if self.alias_key is not None:
+            if self.alias_key in self.represented_objects:
+                node = self.represented_objects[self.alias_key]
+                #if node is None:
+                #    raise RepresenterError("recursive objects are not allowed: %r" % data)
+                return node
+            #self.represented_objects[alias_key] = None
+            self.object_keeper.append(data)
+        data_types = type(data).__mro__
+        if type(data) is types.InstanceType:
+            data_types = self.get_classobj_bases(data.__class__)+list(data_types)
+        if data_types[0] in self.yaml_representers:
+            node = self.yaml_representers[data_types[0]](self, data)
+        else:
+            for data_type in data_types:
+                if data_type in self.yaml_multi_representers:
+                    node = self.yaml_multi_representers[data_type](self, data)
+                    break
+            else:
+                if None in self.yaml_multi_representers:
+                    node = self.yaml_multi_representers[None](self, data)
+                elif None in self.yaml_representers:
+                    node = self.yaml_representers[None](self, data)
+                else:
+                    node = ScalarNode(None, unicode(data))
+        #if alias_key is not None:
+        #    self.represented_objects[alias_key] = node
+        return node
+
+    def add_representer(cls, data_type, representer):
+        if not 'yaml_representers' in cls.__dict__:
+            cls.yaml_representers = cls.yaml_representers.copy()
+        cls.yaml_representers[data_type] = representer
+    add_representer = classmethod(add_representer)
+
+    def add_multi_representer(cls, data_type, representer):
+        if not 'yaml_multi_representers' in cls.__dict__:
+            cls.yaml_multi_representers = cls.yaml_multi_representers.copy()
+        cls.yaml_multi_representers[data_type] = representer
+    add_multi_representer = classmethod(add_multi_representer)
+
+    def represent_scalar(self, tag, value, style=None):
+        if style is None:
+            style = self.default_style
+        node = ScalarNode(tag, value, style=style)
+        if self.alias_key is not None:
+            self.represented_objects[self.alias_key] = node
+        return node
+
+    def represent_sequence(self, tag, sequence, flow_style=None):
+        value = []
+        node = SequenceNode(tag, value, flow_style=flow_style)
+        if self.alias_key is not None:
+            self.represented_objects[self.alias_key] = node
+        best_style = True
+        for item in sequence:
+            node_item = self.represent_data(item)
+            if not (isinstance(node_item, ScalarNode) and not node_item.style):
+                best_style = False
+            value.append(node_item)
+        if flow_style is None:
+            if self.default_flow_style is not None:
+                node.flow_style = self.default_flow_style
+            else:
+                node.flow_style = best_style
+        return node
+
+    def represent_mapping(self, tag, mapping, flow_style=None):
+        value = []
+        node = MappingNode(tag, value, flow_style=flow_style)
+        if self.alias_key is not None:
+            self.represented_objects[self.alias_key] = node
+        best_style = True
+        if hasattr(mapping, 'items'):
+            mapping = mapping.items()
+            mapping.sort()
+        for item_key, item_value in mapping:
+            node_key = self.represent_data(item_key)
+            node_value = self.represent_data(item_value)
+            if not (isinstance(node_key, ScalarNode) and not node_key.style):
+                best_style = False
+            if not (isinstance(node_value, ScalarNode) and not node_value.style):
+                best_style = False
+            value.append((node_key, node_value))
+        if flow_style is None:
+            if self.default_flow_style is not None:
+                node.flow_style = self.default_flow_style
+            else:
+                node.flow_style = best_style
+        return node
+
+    def ignore_aliases(self, data):
+        return False
+
+class SafeRepresenter(BaseRepresenter):
+
+    def ignore_aliases(self, data):
+        if data in [None, ()]:
+            return True
+        if isinstance(data, (str, unicode, bool, int, float)):
+            return True
+
+    def represent_none(self, data):
+        return self.represent_scalar(u'tag:yaml.org,2002:null',
+                u'null')
+
+    def represent_str(self, data):
+        tag = None
+        style = None
+        try:
+            data = unicode(data, 'ascii')
+            tag = u'tag:yaml.org,2002:str'
+        except UnicodeDecodeError:
+            try:
+                data = unicode(data, 'utf-8')
+                tag = u'tag:yaml.org,2002:str'
+            except UnicodeDecodeError:
+                data = data.encode('base64')
+                tag = u'tag:yaml.org,2002:binary'
+                style = '|'
+        return self.represent_scalar(tag, data, style=style)
+
+    def represent_unicode(self, data):
+        return self.represent_scalar(u'tag:yaml.org,2002:str', data)
+
+    def represent_bool(self, data):
+        if data:
+            value = u'true'
+        else:
+            value = u'false'
+        return self.represent_scalar(u'tag:yaml.org,2002:bool', value)
+
+    def represent_int(self, data):
+        return self.represent_scalar(u'tag:yaml.org,2002:int', unicode(data))
+
+    def represent_long(self, data):
+        return self.represent_scalar(u'tag:yaml.org,2002:int', unicode(data))
+
+    inf_value = 1e300
+    while repr(inf_value) != repr(inf_value*inf_value):
+        inf_value *= inf_value
+
+    def represent_float(self, data):
+        if data != data or (data == 0.0 and data == 1.0):
+            value = u'.nan'
+        elif data == self.inf_value:
+            value = u'.inf'
+        elif data == -self.inf_value:
+            value = u'-.inf'
+        else:
+            value = unicode(repr(data)).lower()
+            # Note that in some cases `repr(data)` represents a float number
+            # without the decimal parts.  For instance:
+            #   >>> repr(1e17)
+            #   '1e17'
+            # Unfortunately, this is not a valid float representation according
+            # to the definition of the `!!float` tag.  We fix this by adding
+            # '.0' before the 'e' symbol.
+            if u'.' not in value and u'e' in value:
+                value = value.replace(u'e', u'.0e', 1)
+        return self.represent_scalar(u'tag:yaml.org,2002:float', value)
+
+    def represent_list(self, data):
+        #pairs = (len(data) > 0 and isinstance(data, list))
+        #if pairs:
+        #    for item in data:
+        #        if not isinstance(item, tuple) or len(item) != 2:
+        #            pairs = False
+        #            break
+        #if not pairs:
+            return self.represent_sequence(u'tag:yaml.org,2002:seq', data)
+        #value = []
+        #for item_key, item_value in data:
+        #    value.append(self.represent_mapping(u'tag:yaml.org,2002:map',
+        #        [(item_key, item_value)]))
+        #return SequenceNode(u'tag:yaml.org,2002:pairs', value)
+
+    def represent_dict(self, data):
+        return self.represent_mapping(u'tag:yaml.org,2002:map', data)
+
+    def represent_set(self, data):
+        value = {}
+        for key in data:
+            value[key] = None
+        return self.represent_mapping(u'tag:yaml.org,2002:set', value)
+
+    def represent_date(self, data):
+        value = unicode(data.isoformat())
+        return self.represent_scalar(u'tag:yaml.org,2002:timestamp', value)
+
+    def represent_datetime(self, data):
+        value = unicode(data.isoformat(' '))
+        return self.represent_scalar(u'tag:yaml.org,2002:timestamp', value)
+
+    def represent_yaml_object(self, tag, data, cls, flow_style=None):
+        if hasattr(data, '__getstate__'):
+            state = data.__getstate__()
+        else:
+            state = data.__dict__.copy()
+        return self.represent_mapping(tag, state, flow_style=flow_style)
+
+    def represent_undefined(self, data):
+        raise RepresenterError("cannot represent an object: %s" % data)
+
+SafeRepresenter.add_representer(type(None),
+        SafeRepresenter.represent_none)
+
+SafeRepresenter.add_representer(str,
+        SafeRepresenter.represent_str)
+
+SafeRepresenter.add_representer(unicode,
+        SafeRepresenter.represent_unicode)
+
+SafeRepresenter.add_representer(bool,
+        SafeRepresenter.represent_bool)
+
+SafeRepresenter.add_representer(int,
+        SafeRepresenter.represent_int)
+
+SafeRepresenter.add_representer(long,
+        SafeRepresenter.represent_long)
+
+SafeRepresenter.add_representer(float,
+        SafeRepresenter.represent_float)
+
+SafeRepresenter.add_representer(list,
+        SafeRepresenter.represent_list)
+
+SafeRepresenter.add_representer(tuple,
+        SafeRepresenter.represent_list)
+
+SafeRepresenter.add_representer(dict,
+        SafeRepresenter.represent_dict)
+
+SafeRepresenter.add_representer(set,
+        SafeRepresenter.represent_set)
+
+SafeRepresenter.add_representer(datetime.date,
+        SafeRepresenter.represent_date)
+
+SafeRepresenter.add_representer(datetime.datetime,
+        SafeRepresenter.represent_datetime)
+
+SafeRepresenter.add_representer(None,
+        SafeRepresenter.represent_undefined)
+
+class Representer(SafeRepresenter):
+
+    def represent_str(self, data):
+        tag = None
+        style = None
+        try:
+            data = unicode(data, 'ascii')
+            tag = u'tag:yaml.org,2002:str'
+        except UnicodeDecodeError:
+            try:
+                data = unicode(data, 'utf-8')
+                tag = u'tag:yaml.org,2002:python/str'
+            except UnicodeDecodeError:
+                data = data.encode('base64')
+                tag = u'tag:yaml.org,2002:binary'
+                style = '|'
+        return self.represent_scalar(tag, data, style=style)
+
+    def represent_unicode(self, data):
+        tag = None
+        try:
+            data.encode('ascii')
+            tag = u'tag:yaml.org,2002:python/unicode'
+        except UnicodeEncodeError:
+            tag = u'tag:yaml.org,2002:str'
+        return self.represent_scalar(tag, data)
+
+    def represent_long(self, data):
+        tag = u'tag:yaml.org,2002:int'
+        if int(data) is not data:
+            tag = u'tag:yaml.org,2002:python/long'
+        return self.represent_scalar(tag, unicode(data))
+
+    def represent_complex(self, data):
+        if data.imag == 0.0:
+            data = u'%r' % data.real
+        elif data.real == 0.0:
+            data = u'%rj' % data.imag
+        elif data.imag > 0:
+            data = u'%r+%rj' % (data.real, data.imag)
+        else:
+            data = u'%r%rj' % (data.real, data.imag)
+        return self.represent_scalar(u'tag:yaml.org,2002:python/complex', data)
+
+    def represent_tuple(self, data):
+        return self.represent_sequence(u'tag:yaml.org,2002:python/tuple', data)
+
+    def represent_name(self, data):
+        name = u'%s.%s' % (data.__module__, data.__name__)
+        return self.represent_scalar(u'tag:yaml.org,2002:python/name:'+name, u'')
+
+    def represent_module(self, data):
+        return self.represent_scalar(
+                u'tag:yaml.org,2002:python/module:'+data.__name__, u'')
+
+    def represent_instance(self, data):
+        # For instances of classic classes, we use __getinitargs__ and
+        # __getstate__ to serialize the data.
+
+        # If data.__getinitargs__ exists, the object must be reconstructed by
+        # calling cls(**args), where args is a tuple returned by
+        # __getinitargs__. Otherwise, the cls.__init__ method should never be
+        # called and the class instance is created by instantiating a trivial
+        # class and assigning to the instance's __class__ variable.
+
+        # If data.__getstate__ exists, it returns the state of the object.
+        # Otherwise, the state of the object is data.__dict__.
+
+        # We produce either a !!python/object or !!python/object/new node.
+        # If data.__getinitargs__ does not exist and state is a dictionary, we
+        # produce a !!python/object node . Otherwise we produce a
+        # !!python/object/new node.
+
+        cls = data.__class__
+        class_name = u'%s.%s' % (cls.__module__, cls.__name__)
+        args = None
+        state = None
+        if hasattr(data, '__getinitargs__'):
+            args = list(data.__getinitargs__())
+        if hasattr(data, '__getstate__'):
+            state = data.__getstate__()
+        else:
+            state = data.__dict__
+        if args is None and isinstance(state, dict):
+            return self.represent_mapping(
+                    u'tag:yaml.org,2002:python/object:'+class_name, state)
+        if isinstance(state, dict) and not state:
+            return self.represent_sequence(
+                    u'tag:yaml.org,2002:python/object/new:'+class_name, args)
+        value = {}
+        if args:
+            value['args'] = args
+        value['state'] = state
+        return self.represent_mapping(
+                u'tag:yaml.org,2002:python/object/new:'+class_name, value)
+
+    def represent_object(self, data):
+        # We use __reduce__ API to save the data. data.__reduce__ returns
+        # a tuple of length 2-5:
+        #   (function, args, state, listitems, dictitems)
+
+        # For reconstructing, we calls function(*args), then set its state,
+        # listitems, and dictitems if they are not None.
+
+        # A special case is when function.__name__ == '__newobj__'. In this
+        # case we create the object with args[0].__new__(*args).
+
+        # Another special case is when __reduce__ returns a string - we don't
+        # support it.
+
+        # We produce a !!python/object, !!python/object/new or
+        # !!python/object/apply node.
+
+        cls = type(data)
+        if cls in copy_reg.dispatch_table:
+            reduce = copy_reg.dispatch_table[cls](data)
+        elif hasattr(data, '__reduce_ex__'):
+            reduce = data.__reduce_ex__(2)
+        elif hasattr(data, '__reduce__'):
+            reduce = data.__reduce__()
+        else:
+            raise RepresenterError("cannot represent object: %r" % data)
+        reduce = (list(reduce)+[None]*5)[:5]
+        function, args, state, listitems, dictitems = reduce
+        args = list(args)
+        if state is None:
+            state = {}
+        if listitems is not None:
+            listitems = list(listitems)
+        if dictitems is not None:
+            dictitems = dict(dictitems)
+        if function.__name__ == '__newobj__':
+            function = args[0]
+            args = args[1:]
+            tag = u'tag:yaml.org,2002:python/object/new:'
+            newobj = True
+        else:
+            tag = u'tag:yaml.org,2002:python/object/apply:'
+            newobj = False
+        function_name = u'%s.%s' % (function.__module__, function.__name__)
+        if not args and not listitems and not dictitems \
+                and isinstance(state, dict) and newobj:
+            return self.represent_mapping(
+                    u'tag:yaml.org,2002:python/object:'+function_name, state)
+        if not listitems and not dictitems  \
+                and isinstance(state, dict) and not state:
+            return self.represent_sequence(tag+function_name, args)
+        value = {}
+        if args:
+            value['args'] = args
+        if state or not isinstance(state, dict):
+            value['state'] = state
+        if listitems:
+            value['listitems'] = listitems
+        if dictitems:
+            value['dictitems'] = dictitems
+        return self.represent_mapping(tag+function_name, value)
+
+Representer.add_representer(str,
+        Representer.represent_str)
+
+Representer.add_representer(unicode,
+        Representer.represent_unicode)
+
+Representer.add_representer(long,
+        Representer.represent_long)
+
+Representer.add_representer(complex,
+        Representer.represent_complex)
+
+Representer.add_representer(tuple,
+        Representer.represent_tuple)
+
+Representer.add_representer(type,
+        Representer.represent_name)
+
+Representer.add_representer(types.ClassType,
+        Representer.represent_name)
+
+Representer.add_representer(types.FunctionType,
+        Representer.represent_name)
+
+Representer.add_representer(types.BuiltinFunctionType,
+        Representer.represent_name)
+
+Representer.add_representer(types.ModuleType,
+        Representer.represent_module)
+
+Representer.add_multi_representer(types.InstanceType,
+        Representer.represent_instance)
+
+Representer.add_multi_representer(object,
+        Representer.represent_object)
+
diff --git a/tablib/packages/yaml/resolver.py b/tablib/packages/yaml/resolver.py
new file mode 100644
index 0000000..6b5ab87
--- /dev/null
+++ b/tablib/packages/yaml/resolver.py
@@ -0,0 +1,224 @@
+
+__all__ = ['BaseResolver', 'Resolver']
+
+from error import *
+from nodes import *
+
+import re
+
+class ResolverError(YAMLError):
+    pass
+
+class BaseResolver(object):
+
+    DEFAULT_SCALAR_TAG = u'tag:yaml.org,2002:str'
+    DEFAULT_SEQUENCE_TAG = u'tag:yaml.org,2002:seq'
+    DEFAULT_MAPPING_TAG = u'tag:yaml.org,2002:map'
+
+    yaml_implicit_resolvers = {}
+    yaml_path_resolvers = {}
+
+    def __init__(self):
+        self.resolver_exact_paths = []
+        self.resolver_prefix_paths = []
+
+    def add_implicit_resolver(cls, tag, regexp, first):
+        if not 'yaml_implicit_resolvers' in cls.__dict__:
+            cls.yaml_implicit_resolvers = cls.yaml_implicit_resolvers.copy()
+        if first is None:
+            first = [None]
+        for ch in first:
+            cls.yaml_implicit_resolvers.setdefault(ch, []).append((tag, regexp))
+    add_implicit_resolver = classmethod(add_implicit_resolver)
+
+    def add_path_resolver(cls, tag, path, kind=None):
+        # Note: `add_path_resolver` is experimental.  The API could be changed.
+        # `new_path` is a pattern that is matched against the path from the
+        # root to the node that is being considered.  `node_path` elements are
+        # tuples `(node_check, index_check)`.  `node_check` is a node class:
+        # `ScalarNode`, `SequenceNode`, `MappingNode` or `None`.  `None`
+        # matches any kind of a node.  `index_check` could be `None`, a boolean
+        # value, a string value, or a number.  `None` and `False` match against
+        # any _value_ of sequence and mapping nodes.  `True` matches against
+        # any _key_ of a mapping node.  A string `index_check` matches against
+        # a mapping value that corresponds to a scalar key which content is
+        # equal to the `index_check` value.  An integer `index_check` matches
+        # against a sequence value with the index equal to `index_check`.
+        if not 'yaml_path_resolvers' in cls.__dict__:
+            cls.yaml_path_resolvers = cls.yaml_path_resolvers.copy()
+        new_path = []
+        for element in path:
+            if isinstance(element, (list, tuple)):
+                if len(element) == 2:
+                    node_check, index_check = element
+                elif len(element) == 1:
+                    node_check = element[0]
+                    index_check = True
+                else:
+                    raise ResolverError("Invalid path element: %s" % element)
+            else:
+                node_check = None
+                index_check = element
+            if node_check is str:
+                node_check = ScalarNode
+            elif node_check is list:
+                node_check = SequenceNode
+            elif node_check is dict:
+                node_check = MappingNode
+            elif node_check not in [ScalarNode, SequenceNode, MappingNode]  \
+                    and not isinstance(node_check, basestring)  \
+                    and node_check is not None:
+                raise ResolverError("Invalid node checker: %s" % node_check)
+            if not isinstance(index_check, (basestring, int))   \
+                    and index_check is not None:
+                raise ResolverError("Invalid index checker: %s" % index_check)
+            new_path.append((node_check, index_check))
+        if kind is str:
+            kind = ScalarNode
+        elif kind is list:
+            kind = SequenceNode
+        elif kind is dict:
+            kind = MappingNode
+        elif kind not in [ScalarNode, SequenceNode, MappingNode]    \
+                and kind is not None:
+            raise ResolverError("Invalid node kind: %s" % kind)
+        cls.yaml_path_resolvers[tuple(new_path), kind] = tag
+    add_path_resolver = classmethod(add_path_resolver)
+
+    def descend_resolver(self, current_node, current_index):
+        if not self.yaml_path_resolvers:
+            return
+        exact_paths = {}
+        prefix_paths = []
+        if current_node:
+            depth = len(self.resolver_prefix_paths)
+            for path, kind in self.resolver_prefix_paths[-1]:
+                if self.check_resolver_prefix(depth, path, kind,
+                        current_node, current_index):
+                    if len(path) > depth:
+                        prefix_paths.append((path, kind))
+                    else:
+                        exact_paths[kind] = self.yaml_path_resolvers[path, kind]
+        else:
+            for path, kind in self.yaml_path_resolvers:
+                if not path:
+                    exact_paths[kind] = self.yaml_path_resolvers[path, kind]
+                else:
+                    prefix_paths.append((path, kind))
+        self.resolver_exact_paths.append(exact_paths)
+        self.resolver_prefix_paths.append(prefix_paths)
+
+    def ascend_resolver(self):
+        if not self.yaml_path_resolvers:
+            return
+        self.resolver_exact_paths.pop()
+        self.resolver_prefix_paths.pop()
+
+    def check_resolver_prefix(self, depth, path, kind,
+            current_node, current_index):
+        node_check, index_check = path[depth-1]
+        if isinstance(node_check, basestring):
+            if current_node.tag != node_check:
+                return
+        elif node_check is not None:
+            if not isinstance(current_node, node_check):
+                return
+        if index_check is True and current_index is not None:
+            return
+        if (index_check is False or index_check is None)    \
+                and current_index is None:
+            return
+        if isinstance(index_check, basestring):
+            if not (isinstance(current_index, ScalarNode)
+                    and index_check == current_index.value):
+                return
+        elif isinstance(index_check, int) and not isinstance(index_check, bool):
+            if index_check != current_index:
+                return
+        return True
+
+    def resolve(self, kind, value, implicit):
+        if kind is ScalarNode and implicit[0]:
+            if value == u'':
+                resolvers = self.yaml_implicit_resolvers.get(u'', [])
+            else:
+                resolvers = self.yaml_implicit_resolvers.get(value[0], [])
+            resolvers += self.yaml_implicit_resolvers.get(None, [])
+            for tag, regexp in resolvers:
+                if regexp.match(value):
+                    return tag
+            implicit = implicit[1]
+        if self.yaml_path_resolvers:
+            exact_paths = self.resolver_exact_paths[-1]
+            if kind in exact_paths:
+                return exact_paths[kind]
+            if None in exact_paths:
+                return exact_paths[None]
+        if kind is ScalarNode:
+            return self.DEFAULT_SCALAR_TAG
+        elif kind is SequenceNode:
+            return self.DEFAULT_SEQUENCE_TAG
+        elif kind is MappingNode:
+            return self.DEFAULT_MAPPING_TAG
+
+class Resolver(BaseResolver):
+    pass
+
+Resolver.add_implicit_resolver(
+        u'tag:yaml.org,2002:bool',
+        re.compile(ur'''^(?:yes|Yes|YES|no|No|NO
+                    |true|True|TRUE|false|False|FALSE
+                    |on|On|ON|off|Off|OFF)$''', re.X),
+        list(u'yYnNtTfFoO'))
+
+Resolver.add_implicit_resolver(
+        u'tag:yaml.org,2002:float',
+        re.compile(ur'''^(?:[-+]?(?:[0-9][0-9_]*)\.[0-9_]*(?:[eE][-+][0-9]+)?
+                    |\.[0-9_]+(?:[eE][-+][0-9]+)?
+                    |[-+]?[0-9][0-9_]*(?::[0-5]?[0-9])+\.[0-9_]*
+                    |[-+]?\.(?:inf|Inf|INF)
+                    |\.(?:nan|NaN|NAN))$''', re.X),
+        list(u'-+0123456789.'))
+
+Resolver.add_implicit_resolver(
+        u'tag:yaml.org,2002:int',
+        re.compile(ur'''^(?:[-+]?0b[0-1_]+
+                    |[-+]?0[0-7_]+
+                    |[-+]?(?:0|[1-9][0-9_]*)
+                    |[-+]?0x[0-9a-fA-F_]+
+                    |[-+]?[1-9][0-9_]*(?::[0-5]?[0-9])+)$''', re.X),
+        list(u'-+0123456789'))
+
+Resolver.add_implicit_resolver(
+        u'tag:yaml.org,2002:merge',
+        re.compile(ur'^(?:<<)$'),
+        [u'<'])
+
+Resolver.add_implicit_resolver(
+        u'tag:yaml.org,2002:null',
+        re.compile(ur'''^(?: ~
+                    |null|Null|NULL
+                    | )$''', re.X),
+        [u'~', u'n', u'N', u''])
+
+Resolver.add_implicit_resolver(
+        u'tag:yaml.org,2002:timestamp',
+        re.compile(ur'''^(?:[0-9][0-9][0-9][0-9]-[0-9][0-9]-[0-9][0-9]
+                    |[0-9][0-9][0-9][0-9] -[0-9][0-9]? -[0-9][0-9]?
+                     (?:[Tt]|[ \t]+)[0-9][0-9]?
+                     :[0-9][0-9] :[0-9][0-9] (?:\.[0-9]*)?
+                     (?:[ \t]*(?:Z|[-+][0-9][0-9]?(?::[0-9][0-9])?))?)$''', re.X),
+        list(u'0123456789'))
+
+Resolver.add_implicit_resolver(
+        u'tag:yaml.org,2002:value',
+        re.compile(ur'^(?:=)$'),
+        [u'='])
+
+# The following resolver is only for documentation purposes. It cannot work
+# because plain scalars cannot start with '!', '&', or '*'.
+Resolver.add_implicit_resolver(
+        u'tag:yaml.org,2002:yaml',
+        re.compile(ur'^(?:!|&|\*)$'),
+        list(u'!&*'))
+
diff --git a/tablib/packages/yaml/scanner.py b/tablib/packages/yaml/scanner.py
new file mode 100644
index 0000000..5228fad
--- /dev/null
+++ b/tablib/packages/yaml/scanner.py
@@ -0,0 +1,1457 @@
+
+# Scanner produces tokens of the following types:
+# STREAM-START
+# STREAM-END
+# DIRECTIVE(name, value)
+# DOCUMENT-START
+# DOCUMENT-END
+# BLOCK-SEQUENCE-START
+# BLOCK-MAPPING-START
+# BLOCK-END
+# FLOW-SEQUENCE-START
+# FLOW-MAPPING-START
+# FLOW-SEQUENCE-END
+# FLOW-MAPPING-END
+# BLOCK-ENTRY
+# FLOW-ENTRY
+# KEY
+# VALUE
+# ALIAS(value)
+# ANCHOR(value)
+# TAG(value)
+# SCALAR(value, plain, style)
+#
+# Read comments in the Scanner code for more details.
+#
+
+__all__ = ['Scanner', 'ScannerError']
+
+from error import MarkedYAMLError
+from tokens import *
+
+class ScannerError(MarkedYAMLError):
+    pass
+
+class SimpleKey(object):
+    # See below simple keys treatment.
+
+    def __init__(self, token_number, required, index, line, column, mark):
+        self.token_number = token_number
+        self.required = required
+        self.index = index
+        self.line = line
+        self.column = column
+        self.mark = mark
+
+class Scanner(object):
+
+    def __init__(self):
+        """Initialize the scanner."""
+        # It is assumed that Scanner and Reader will have a common descendant.
+        # Reader do the dirty work of checking for BOM and converting the
+        # input data to Unicode. It also adds NUL to the end.
+        #
+        # Reader supports the following methods
+        #   self.peek(i=0)       # peek the next i-th character
+        #   self.prefix(l=1)     # peek the next l characters
+        #   self.forward(l=1)    # read the next l characters and move the pointer.
+
+        # Had we reached the end of the stream?
+        self.done = False
+
+        # The number of unclosed '{' and '['. `flow_level == 0` means block
+        # context.
+        self.flow_level = 0
+
+        # List of processed tokens that are not yet emitted.
+        self.tokens = []
+
+        # Add the STREAM-START token.
+        self.fetch_stream_start()
+
+        # Number of tokens that were emitted through the `get_token` method.
+        self.tokens_taken = 0
+
+        # The current indentation level.
+        self.indent = -1
+
+        # Past indentation levels.
+        self.indents = []
+
+        # Variables related to simple keys treatment.
+
+        # A simple key is a key that is not denoted by the '?' indicator.
+        # Example of simple keys:
+        #   ---
+        #   block simple key: value
+        #   ? not a simple key:
+        #   : { flow simple key: value }
+        # We emit the KEY token before all keys, so when we find a potential
+        # simple key, we try to locate the corresponding ':' indicator.
+        # Simple keys should be limited to a single line and 1024 characters.
+
+        # Can a simple key start at the current position? A simple key may
+        # start:
+        # - at the beginning of the line, not counting indentation spaces
+        #       (in block context),
+        # - after '{', '[', ',' (in the flow context),
+        # - after '?', ':', '-' (in the block context).
+        # In the block context, this flag also signifies if a block collection
+        # may start at the current position.
+        self.allow_simple_key = True
+
+        # Keep track of possible simple keys. This is a dictionary. The key
+        # is `flow_level`; there can be no more that one possible simple key
+        # for each level. The value is a SimpleKey record:
+        #   (token_number, required, index, line, column, mark)
+        # A simple key may start with ALIAS, ANCHOR, TAG, SCALAR(flow),
+        # '[', or '{' tokens.
+        self.possible_simple_keys = {}
+
+    # Public methods.
+
+    def check_token(self, *choices):
+        # Check if the next token is one of the given types.
+        while self.need_more_tokens():
+            self.fetch_more_tokens()
+        if self.tokens:
+            if not choices:
+                return True
+            for choice in choices:
+                if isinstance(self.tokens[0], choice):
+                    return True
+        return False
+
+    def peek_token(self):
+        # Return the next token, but do not delete if from the queue.
+        while self.need_more_tokens():
+            self.fetch_more_tokens()
+        if self.tokens:
+            return self.tokens[0]
+
+    def get_token(self):
+        # Return the next token.
+        while self.need_more_tokens():
+            self.fetch_more_tokens()
+        if self.tokens:
+            self.tokens_taken += 1
+            return self.tokens.pop(0)
+
+    # Private methods.
+
+    def need_more_tokens(self):
+        if self.done:
+            return False
+        if not self.tokens:
+            return True
+        # The current token may be a potential simple key, so we
+        # need to look further.
+        self.stale_possible_simple_keys()
+        if self.next_possible_simple_key() == self.tokens_taken:
+            return True
+
+    def fetch_more_tokens(self):
+
+        # Eat whitespaces and comments until we reach the next token.
+        self.scan_to_next_token()
+
+        # Remove obsolete possible simple keys.
+        self.stale_possible_simple_keys()
+
+        # Compare the current indentation and column. It may add some tokens
+        # and decrease the current indentation level.
+        self.unwind_indent(self.column)
+
+        # Peek the next character.
+        ch = self.peek()
+
+        # Is it the end of stream?
+        if ch == u'\0':
+            return self.fetch_stream_end()
+
+        # Is it a directive?
+        if ch == u'%' and self.check_directive():
+            return self.fetch_directive()
+
+        # Is it the document start?
+        if ch == u'-' and self.check_document_start():
+            return self.fetch_document_start()
+
+        # Is it the document end?
+        if ch == u'.' and self.check_document_end():
+            return self.fetch_document_end()
+
+        # TODO: support for BOM within a stream.
+        #if ch == u'\uFEFF':
+        #    return self.fetch_bom()    <-- issue BOMToken
+
+        # Note: the order of the following checks is NOT significant.
+
+        # Is it the flow sequence start indicator?
+        if ch == u'[':
+            return self.fetch_flow_sequence_start()
+
+        # Is it the flow mapping start indicator?
+        if ch == u'{':
+            return self.fetch_flow_mapping_start()
+
+        # Is it the flow sequence end indicator?
+        if ch == u']':
+            return self.fetch_flow_sequence_end()
+
+        # Is it the flow mapping end indicator?
+        if ch == u'}':
+            return self.fetch_flow_mapping_end()
+
+        # Is it the flow entry indicator?
+        if ch == u',':
+            return self.fetch_flow_entry()
+
+        # Is it the block entry indicator?
+        if ch == u'-' and self.check_block_entry():
+            return self.fetch_block_entry()
+
+        # Is it the key indicator?
+        if ch == u'?' and self.check_key():
+            return self.fetch_key()
+
+        # Is it the value indicator?
+        if ch == u':' and self.check_value():
+            return self.fetch_value()
+
+        # Is it an alias?
+        if ch == u'*':
+            return self.fetch_alias()
+
+        # Is it an anchor?
+        if ch == u'&':
+            return self.fetch_anchor()
+
+        # Is it a tag?
+        if ch == u'!':
+            return self.fetch_tag()
+
+        # Is it a literal scalar?
+        if ch == u'|' and not self.flow_level:
+            return self.fetch_literal()
+
+        # Is it a folded scalar?
+        if ch == u'>' and not self.flow_level:
+            return self.fetch_folded()
+
+        # Is it a single quoted scalar?
+        if ch == u'\'':
+            return self.fetch_single()
+
+        # Is it a double quoted scalar?
+        if ch == u'\"':
+            return self.fetch_double()
+
+        # It must be a plain scalar then.
+        if self.check_plain():
+            return self.fetch_plain()
+
+        # No? It's an error. Let's produce a nice error message.
+        raise ScannerError("while scanning for the next token", None,
+                "found character %r that cannot start any token"
+                % ch.encode('utf-8'), self.get_mark())
+
+    # Simple keys treatment.
+
+    def next_possible_simple_key(self):
+        # Return the number of the nearest possible simple key. Actually we
+        # don't need to loop through the whole dictionary. We may replace it
+        # with the following code:
+        #   if not self.possible_simple_keys:
+        #       return None
+        #   return self.possible_simple_keys[
+        #           min(self.possible_simple_keys.keys())].token_number
+        min_token_number = None
+        for level in self.possible_simple_keys:
+            key = self.possible_simple_keys[level]
+            if min_token_number is None or key.token_number < min_token_number:
+                min_token_number = key.token_number
+        return min_token_number
+
+    def stale_possible_simple_keys(self):
+        # Remove entries that are no longer possible simple keys. According to
+        # the YAML specification, simple keys
+        # - should be limited to a single line,
+        # - should be no longer than 1024 characters.
+        # Disabling this procedure will allow simple keys of any length and
+        # height (may cause problems if indentation is broken though).
+        for level in self.possible_simple_keys.keys():
+            key = self.possible_simple_keys[level]
+            if key.line != self.line  \
+                    or self.index-key.index > 1024:
+                if key.required:
+                    raise ScannerError("while scanning a simple key", key.mark,
+                            "could not found expected ':'", self.get_mark())
+                del self.possible_simple_keys[level]
+
+    def save_possible_simple_key(self):
+        # The next token may start a simple key. We check if it's possible
+        # and save its position. This function is called for
+        #   ALIAS, ANCHOR, TAG, SCALAR(flow), '[', and '{'.
+
+        # Check if a simple key is required at the current position.
+        required = not self.flow_level and self.indent == self.column
+
+        # A simple key is required only if it is the first token in the current
+        # line. Therefore it is always allowed.
+        assert self.allow_simple_key or not required
+
+        # The next token might be a simple key. Let's save it's number and
+        # position.
+        if self.allow_simple_key:
+            self.remove_possible_simple_key()
+            token_number = self.tokens_taken+len(self.tokens)
+            key = SimpleKey(token_number, required,
+                    self.index, self.line, self.column, self.get_mark())
+            self.possible_simple_keys[self.flow_level] = key
+
+    def remove_possible_simple_key(self):
+        # Remove the saved possible key position at the current flow level.
+        if self.flow_level in self.possible_simple_keys:
+            key = self.possible_simple_keys[self.flow_level]
+            
+            if key.required:
+                raise ScannerError("while scanning a simple key", key.mark,
+                        "could not found expected ':'", self.get_mark())
+
+            del self.possible_simple_keys[self.flow_level]
+
+    # Indentation functions.
+
+    def unwind_indent(self, column):
+
+        ## In flow context, tokens should respect indentation.
+        ## Actually the condition should be `self.indent >= column` according to
+        ## the spec. But this condition will prohibit intuitively correct
+        ## constructions such as
+        ## key : {
+        ## }
+        #if self.flow_level and self.indent > column:
+        #    raise ScannerError(None, None,
+        #            "invalid intendation or unclosed '[' or '{'",
+        #            self.get_mark())
+
+        # In the flow context, indentation is ignored. We make the scanner less
+        # restrictive then specification requires.
+        if self.flow_level:
+            return
+
+        # In block context, we may need to issue the BLOCK-END tokens.
+        while self.indent > column:
+            mark = self.get_mark()
+            self.indent = self.indents.pop()
+            self.tokens.append(BlockEndToken(mark, mark))
+
+    def add_indent(self, column):
+        # Check if we need to increase indentation.
+        if self.indent < column:
+            self.indents.append(self.indent)
+            self.indent = column
+            return True
+        return False
+
+    # Fetchers.
+
+    def fetch_stream_start(self):
+        # We always add STREAM-START as the first token and STREAM-END as the
+        # last token.
+
+        # Read the token.
+        mark = self.get_mark()
+        
+        # Add STREAM-START.
+        self.tokens.append(StreamStartToken(mark, mark,
+            encoding=self.encoding))
+        
+
+    def fetch_stream_end(self):
+
+        # Set the current intendation to -1.
+        self.unwind_indent(-1)
+
+        # Reset simple keys.
+        self.remove_possible_simple_key()
+        self.allow_simple_key = False
+        self.possible_simple_keys = {}
+
+        # Read the token.
+        mark = self.get_mark()
+        
+        # Add STREAM-END.
+        self.tokens.append(StreamEndToken(mark, mark))
+
+        # The steam is finished.
+        self.done = True
+
+    def fetch_directive(self):
+        
+        # Set the current intendation to -1.
+        self.unwind_indent(-1)
+
+        # Reset simple keys.
+        self.remove_possible_simple_key()
+        self.allow_simple_key = False
+
+        # Scan and add DIRECTIVE.
+        self.tokens.append(self.scan_directive())
+
+    def fetch_document_start(self):
+        self.fetch_document_indicator(DocumentStartToken)
+
+    def fetch_document_end(self):
+        self.fetch_document_indicator(DocumentEndToken)
+
+    def fetch_document_indicator(self, TokenClass):
+
+        # Set the current intendation to -1.
+        self.unwind_indent(-1)
+
+        # Reset simple keys. Note that there could not be a block collection
+        # after '---'.
+        self.remove_possible_simple_key()
+        self.allow_simple_key = False
+
+        # Add DOCUMENT-START or DOCUMENT-END.
+        start_mark = self.get_mark()
+        self.forward(3)
+        end_mark = self.get_mark()
+        self.tokens.append(TokenClass(start_mark, end_mark))
+
+    def fetch_flow_sequence_start(self):
+        self.fetch_flow_collection_start(FlowSequenceStartToken)
+
+    def fetch_flow_mapping_start(self):
+        self.fetch_flow_collection_start(FlowMappingStartToken)
+
+    def fetch_flow_collection_start(self, TokenClass):
+
+        # '[' and '{' may start a simple key.
+        self.save_possible_simple_key()
+
+        # Increase the flow level.
+        self.flow_level += 1
+
+        # Simple keys are allowed after '[' and '{'.
+        self.allow_simple_key = True
+
+        # Add FLOW-SEQUENCE-START or FLOW-MAPPING-START.
+        start_mark = self.get_mark()
+        self.forward()
+        end_mark = self.get_mark()
+        self.tokens.append(TokenClass(start_mark, end_mark))
+
+    def fetch_flow_sequence_end(self):
+        self.fetch_flow_collection_end(FlowSequenceEndToken)
+
+    def fetch_flow_mapping_end(self):
+        self.fetch_flow_collection_end(FlowMappingEndToken)
+
+    def fetch_flow_collection_end(self, TokenClass):
+
+        # Reset possible simple key on the current level.
+        self.remove_possible_simple_key()
+
+        # Decrease the flow level.
+        self.flow_level -= 1
+
+        # No simple keys after ']' or '}'.
+        self.allow_simple_key = False
+
+        # Add FLOW-SEQUENCE-END or FLOW-MAPPING-END.
+        start_mark = self.get_mark()
+        self.forward()
+        end_mark = self.get_mark()
+        self.tokens.append(TokenClass(start_mark, end_mark))
+
+    def fetch_flow_entry(self):
+
+        # Simple keys are allowed after ','.
+        self.allow_simple_key = True
+
+        # Reset possible simple key on the current level.
+        self.remove_possible_simple_key()
+
+        # Add FLOW-ENTRY.
+        start_mark = self.get_mark()
+        self.forward()
+        end_mark = self.get_mark()
+        self.tokens.append(FlowEntryToken(start_mark, end_mark))
+
+    def fetch_block_entry(self):
+
+        # Block context needs additional checks.
+        if not self.flow_level:
+
+            # Are we allowed to start a new entry?
+            if not self.allow_simple_key:
+                raise ScannerError(None, None,
+                        "sequence entries are not allowed here",
+                        self.get_mark())
+
+            # We may need to add BLOCK-SEQUENCE-START.
+            if self.add_indent(self.column):
+                mark = self.get_mark()
+                self.tokens.append(BlockSequenceStartToken(mark, mark))
+
+        # It's an error for the block entry to occur in the flow context,
+        # but we let the parser detect this.
+        else:
+            pass
+
+        # Simple keys are allowed after '-'.
+        self.allow_simple_key = True
+
+        # Reset possible simple key on the current level.
+        self.remove_possible_simple_key()
+
+        # Add BLOCK-ENTRY.
+        start_mark = self.get_mark()
+        self.forward()
+        end_mark = self.get_mark()
+        self.tokens.append(BlockEntryToken(start_mark, end_mark))
+
+    def fetch_key(self):
+        
+        # Block context needs additional checks.
+        if not self.flow_level:
+
+            # Are we allowed to start a key (not nessesary a simple)?
+            if not self.allow_simple_key:
+                raise ScannerError(None, None,
+                        "mapping keys are not allowed here",
+                        self.get_mark())
+
+            # We may need to add BLOCK-MAPPING-START.
+            if self.add_indent(self.column):
+                mark = self.get_mark()
+                self.tokens.append(BlockMappingStartToken(mark, mark))
+
+        # Simple keys are allowed after '?' in the block context.
+        self.allow_simple_key = not self.flow_level
+
+        # Reset possible simple key on the current level.
+        self.remove_possible_simple_key()
+
+        # Add KEY.
+        start_mark = self.get_mark()
+        self.forward()
+        end_mark = self.get_mark()
+        self.tokens.append(KeyToken(start_mark, end_mark))
+
+    def fetch_value(self):
+
+        # Do we determine a simple key?
+        if self.flow_level in self.possible_simple_keys:
+
+            # Add KEY.
+            key = self.possible_simple_keys[self.flow_level]
+            del self.possible_simple_keys[self.flow_level]
+            self.tokens.insert(key.token_number-self.tokens_taken,
+                    KeyToken(key.mark, key.mark))
+
+            # If this key starts a new block mapping, we need to add
+            # BLOCK-MAPPING-START.
+            if not self.flow_level:
+                if self.add_indent(key.column):
+                    self.tokens.insert(key.token_number-self.tokens_taken,
+                            BlockMappingStartToken(key.mark, key.mark))
+
+            # There cannot be two simple keys one after another.
+            self.allow_simple_key = False
+
+        # It must be a part of a complex key.
+        else:
+            
+            # Block context needs additional checks.
+            # (Do we really need them? They will be catched by the parser
+            # anyway.)
+            if not self.flow_level:
+
+                # We are allowed to start a complex value if and only if
+                # we can start a simple key.
+                if not self.allow_simple_key:
+                    raise ScannerError(None, None,
+                            "mapping values are not allowed here",
+                            self.get_mark())
+
+            # If this value starts a new block mapping, we need to add
+            # BLOCK-MAPPING-START.  It will be detected as an error later by
+            # the parser.
+            if not self.flow_level:
+                if self.add_indent(self.column):
+                    mark = self.get_mark()
+                    self.tokens.append(BlockMappingStartToken(mark, mark))
+
+            # Simple keys are allowed after ':' in the block context.
+            self.allow_simple_key = not self.flow_level
+
+            # Reset possible simple key on the current level.
+            self.remove_possible_simple_key()
+
+        # Add VALUE.
+        start_mark = self.get_mark()
+        self.forward()
+        end_mark = self.get_mark()
+        self.tokens.append(ValueToken(start_mark, end_mark))
+
+    def fetch_alias(self):
+
+        # ALIAS could be a simple key.
+        self.save_possible_simple_key()
+
+        # No simple keys after ALIAS.
+        self.allow_simple_key = False
+
+        # Scan and add ALIAS.
+        self.tokens.append(self.scan_anchor(AliasToken))
+
+    def fetch_anchor(self):
+
+        # ANCHOR could start a simple key.
+        self.save_possible_simple_key()
+
+        # No simple keys after ANCHOR.
+        self.allow_simple_key = False
+
+        # Scan and add ANCHOR.
+        self.tokens.append(self.scan_anchor(AnchorToken))
+
+    def fetch_tag(self):
+
+        # TAG could start a simple key.
+        self.save_possible_simple_key()
+
+        # No simple keys after TAG.
+        self.allow_simple_key = False
+
+        # Scan and add TAG.
+        self.tokens.append(self.scan_tag())
+
+    def fetch_literal(self):
+        self.fetch_block_scalar(style='|')
+
+    def fetch_folded(self):
+        self.fetch_block_scalar(style='>')
+
+    def fetch_block_scalar(self, style):
+
+        # A simple key may follow a block scalar.
+        self.allow_simple_key = True
+
+        # Reset possible simple key on the current level.
+        self.remove_possible_simple_key()
+
+        # Scan and add SCALAR.
+        self.tokens.append(self.scan_block_scalar(style))
+
+    def fetch_single(self):
+        self.fetch_flow_scalar(style='\'')
+
+    def fetch_double(self):
+        self.fetch_flow_scalar(style='"')
+
+    def fetch_flow_scalar(self, style):
+
+        # A flow scalar could be a simple key.
+        self.save_possible_simple_key()
+
+        # No simple keys after flow scalars.
+        self.allow_simple_key = False
+
+        # Scan and add SCALAR.
+        self.tokens.append(self.scan_flow_scalar(style))
+
+    def fetch_plain(self):
+
+        # A plain scalar could be a simple key.
+        self.save_possible_simple_key()
+
+        # No simple keys after plain scalars. But note that `scan_plain` will
+        # change this flag if the scan is finished at the beginning of the
+        # line.
+        self.allow_simple_key = False
+
+        # Scan and add SCALAR. May change `allow_simple_key`.
+        self.tokens.append(self.scan_plain())
+
+    # Checkers.
+
+    def check_directive(self):
+
+        # DIRECTIVE:        ^ '%' ...
+        # The '%' indicator is already checked.
+        if self.column == 0:
+            return True
+
+    def check_document_start(self):
+
+        # DOCUMENT-START:   ^ '---' (' '|'\n')
+        if self.column == 0:
+            if self.prefix(3) == u'---'  \
+                    and self.peek(3) in u'\0 \t\r\n\x85\u2028\u2029':
+                return True
+
+    def check_document_end(self):
+
+        # DOCUMENT-END:     ^ '...' (' '|'\n')
+        if self.column == 0:
+            if self.prefix(3) == u'...'  \
+                    and self.peek(3) in u'\0 \t\r\n\x85\u2028\u2029':
+                return True
+
+    def check_block_entry(self):
+
+        # BLOCK-ENTRY:      '-' (' '|'\n')
+        return self.peek(1) in u'\0 \t\r\n\x85\u2028\u2029'
+
+    def check_key(self):
+
+        # KEY(flow context):    '?'
+        if self.flow_level:
+            return True
+
+        # KEY(block context):   '?' (' '|'\n')
+        else:
+            return self.peek(1) in u'\0 \t\r\n\x85\u2028\u2029'
+
+    def check_value(self):
+
+        # VALUE(flow context):  ':'
+        if self.flow_level:
+            return True
+
+        # VALUE(block context): ':' (' '|'\n')
+        else:
+            return self.peek(1) in u'\0 \t\r\n\x85\u2028\u2029'
+
+    def check_plain(self):
+
+        # A plain scalar may start with any non-space character except:
+        #   '-', '?', ':', ',', '[', ']', '{', '}',
+        #   '#', '&', '*', '!', '|', '>', '\'', '\"',
+        #   '%', '@', '`'.
+        #
+        # It may also start with
+        #   '-', '?', ':'
+        # if it is followed by a non-space character.
+        #
+        # Note that we limit the last rule to the block context (except the
+        # '-' character) because we want the flow context to be space
+        # independent.
+        ch = self.peek()
+        return ch not in u'\0 \t\r\n\x85\u2028\u2029-?:,[]{}#&*!|>\'\"%@`'  \
+                or (self.peek(1) not in u'\0 \t\r\n\x85\u2028\u2029'
+                        and (ch == u'-' or (not self.flow_level and ch in u'?:')))
+
+    # Scanners.
+
+    def scan_to_next_token(self):
+        # We ignore spaces, line breaks and comments.
+        # If we find a line break in the block context, we set the flag
+        # `allow_simple_key` on.
+        # The byte order mark is stripped if it's the first character in the
+        # stream. We do not yet support BOM inside the stream as the
+        # specification requires. Any such mark will be considered as a part
+        # of the document.
+        #
+        # TODO: We need to make tab handling rules more sane. A good rule is
+        #   Tabs cannot precede tokens
+        #   BLOCK-SEQUENCE-START, BLOCK-MAPPING-START, BLOCK-END,
+        #   KEY(block), VALUE(block), BLOCK-ENTRY
+        # So the checking code is
+        #   if <TAB>:
+        #       self.allow_simple_keys = False
+        # We also need to add the check for `allow_simple_keys == True` to
+        # `unwind_indent` before issuing BLOCK-END.
+        # Scanners for block, flow, and plain scalars need to be modified.
+
+        if self.index == 0 and self.peek() == u'\uFEFF':
+            self.forward()
+        found = False
+        while not found:
+            while self.peek() == u' ':
+                self.forward()
+            if self.peek() == u'#':
+                while self.peek() not in u'\0\r\n\x85\u2028\u2029':
+                    self.forward()
+            if self.scan_line_break():
+                if not self.flow_level:
+                    self.allow_simple_key = True
+            else:
+                found = True
+
+    def scan_directive(self):
+        # See the specification for details.
+        start_mark = self.get_mark()
+        self.forward()
+        name = self.scan_directive_name(start_mark)
+        value = None
+        if name == u'YAML':
+            value = self.scan_yaml_directive_value(start_mark)
+            end_mark = self.get_mark()
+        elif name == u'TAG':
+            value = self.scan_tag_directive_value(start_mark)
+            end_mark = self.get_mark()
+        else:
+            end_mark = self.get_mark()
+            while self.peek() not in u'\0\r\n\x85\u2028\u2029':
+                self.forward()
+        self.scan_directive_ignored_line(start_mark)
+        return DirectiveToken(name, value, start_mark, end_mark)
+
+    def scan_directive_name(self, start_mark):
+        # See the specification for details.
+        length = 0
+        ch = self.peek(length)
+        while u'0' <= ch <= u'9' or u'A' <= ch <= u'Z' or u'a' <= ch <= u'z'    \
+                or ch in u'-_':
+            length += 1
+            ch = self.peek(length)
+        if not length:
+            raise ScannerError("while scanning a directive", start_mark,
+                    "expected alphabetic or numeric character, but found %r"
+                    % ch.encode('utf-8'), self.get_mark())
+        value = self.prefix(length)
+        self.forward(length)
+        ch = self.peek()
+        if ch not in u'\0 \r\n\x85\u2028\u2029':
+            raise ScannerError("while scanning a directive", start_mark,
+                    "expected alphabetic or numeric character, but found %r"
+                    % ch.encode('utf-8'), self.get_mark())
+        return value
+
+    def scan_yaml_directive_value(self, start_mark):
+        # See the specification for details.
+        while self.peek() == u' ':
+            self.forward()
+        major = self.scan_yaml_directive_number(start_mark)
+        if self.peek() != '.':
+            raise ScannerError("while scanning a directive", start_mark,
+                    "expected a digit or '.', but found %r"
+                    % self.peek().encode('utf-8'),
+                    self.get_mark())
+        self.forward()
+        minor = self.scan_yaml_directive_number(start_mark)
+        if self.peek() not in u'\0 \r\n\x85\u2028\u2029':
+            raise ScannerError("while scanning a directive", start_mark,
+                    "expected a digit or ' ', but found %r"
+                    % self.peek().encode('utf-8'),
+                    self.get_mark())
+        return (major, minor)
+
+    def scan_yaml_directive_number(self, start_mark):
+        # See the specification for details.
+        ch = self.peek()
+        if not (u'0' <= ch <= u'9'):
+            raise ScannerError("while scanning a directive", start_mark,
+                    "expected a digit, but found %r" % ch.encode('utf-8'),
+                    self.get_mark())
+        length = 0
+        while u'0' <= self.peek(length) <= u'9':
+            length += 1
+        value = int(self.prefix(length))
+        self.forward(length)
+        return value
+
+    def scan_tag_directive_value(self, start_mark):
+        # See the specification for details.
+        while self.peek() == u' ':
+            self.forward()
+        handle = self.scan_tag_directive_handle(start_mark)
+        while self.peek() == u' ':
+            self.forward()
+        prefix = self.scan_tag_directive_prefix(start_mark)
+        return (handle, prefix)
+
+    def scan_tag_directive_handle(self, start_mark):
+        # See the specification for details.
+        value = self.scan_tag_handle('directive', start_mark)
+        ch = self.peek()
+        if ch != u' ':
+            raise ScannerError("while scanning a directive", start_mark,
+                    "expected ' ', but found %r" % ch.encode('utf-8'),
+                    self.get_mark())
+        return value
+
+    def scan_tag_directive_prefix(self, start_mark):
+        # See the specification for details.
+        value = self.scan_tag_uri('directive', start_mark)
+        ch = self.peek()
+        if ch not in u'\0 \r\n\x85\u2028\u2029':
+            raise ScannerError("while scanning a directive", start_mark,
+                    "expected ' ', but found %r" % ch.encode('utf-8'),
+                    self.get_mark())
+        return value
+
+    def scan_directive_ignored_line(self, start_mark):
+        # See the specification for details.
+        while self.peek() == u' ':
+            self.forward()
+        if self.peek() == u'#':
+            while self.peek() not in u'\0\r\n\x85\u2028\u2029':
+                self.forward()
+        ch = self.peek()
+        if ch not in u'\0\r\n\x85\u2028\u2029':
+            raise ScannerError("while scanning a directive", start_mark,
+                    "expected a comment or a line break, but found %r"
+                        % ch.encode('utf-8'), self.get_mark())
+        self.scan_line_break()
+
+    def scan_anchor(self, TokenClass):
+        # The specification does not restrict characters for anchors and
+        # aliases. This may lead to problems, for instance, the document:
+        #   [ *alias, value ]
+        # can be interpteted in two ways, as
+        #   [ "value" ]
+        # and
+        #   [ *alias , "value" ]
+        # Therefore we restrict aliases to numbers and ASCII letters.
+        start_mark = self.get_mark()
+        indicator = self.peek()
+        if indicator == u'*':
+            name = 'alias'
+        else:
+            name = 'anchor'
+        self.forward()
+        length = 0
+        ch = self.peek(length)
+        while u'0' <= ch <= u'9' or u'A' <= ch <= u'Z' or u'a' <= ch <= u'z'    \
+                or ch in u'-_':
+            length += 1
+            ch = self.peek(length)
+        if not length:
+            raise ScannerError("while scanning an %s" % name, start_mark,
+                    "expected alphabetic or numeric character, but found %r"
+                    % ch.encode('utf-8'), self.get_mark())
+        value = self.prefix(length)
+        self.forward(length)
+        ch = self.peek()
+        if ch not in u'\0 \t\r\n\x85\u2028\u2029?:,]}%@`':
+            raise ScannerError("while scanning an %s" % name, start_mark,
+                    "expected alphabetic or numeric character, but found %r"
+                    % ch.encode('utf-8'), self.get_mark())
+        end_mark = self.get_mark()
+        return TokenClass(value, start_mark, end_mark)
+
+    def scan_tag(self):
+        # See the specification for details.
+        start_mark = self.get_mark()
+        ch = self.peek(1)
+        if ch == u'<':
+            handle = None
+            self.forward(2)
+            suffix = self.scan_tag_uri('tag', start_mark)
+            if self.peek() != u'>':
+                raise ScannerError("while parsing a tag", start_mark,
+                        "expected '>', but found %r" % self.peek().encode('utf-8'),
+                        self.get_mark())
+            self.forward()
+        elif ch in u'\0 \t\r\n\x85\u2028\u2029':
+            handle = None
+            suffix = u'!'
+            self.forward()
+        else:
+            length = 1
+            use_handle = False
+            while ch not in u'\0 \r\n\x85\u2028\u2029':
+                if ch == u'!':
+                    use_handle = True
+                    break
+                length += 1
+                ch = self.peek(length)
+            handle = u'!'
+            if use_handle:
+                handle = self.scan_tag_handle('tag', start_mark)
+            else:
+                handle = u'!'
+                self.forward()
+            suffix = self.scan_tag_uri('tag', start_mark)
+        ch = self.peek()
+        if ch not in u'\0 \r\n\x85\u2028\u2029':
+            raise ScannerError("while scanning a tag", start_mark,
+                    "expected ' ', but found %r" % ch.encode('utf-8'),
+                    self.get_mark())
+        value = (handle, suffix)
+        end_mark = self.get_mark()
+        return TagToken(value, start_mark, end_mark)
+
+    def scan_block_scalar(self, style):
+        # See the specification for details.
+
+        if style == '>':
+            folded = True
+        else:
+            folded = False
+
+        chunks = []
+        start_mark = self.get_mark()
+
+        # Scan the header.
+        self.forward()
+        chomping, increment = self.scan_block_scalar_indicators(start_mark)
+        self.scan_block_scalar_ignored_line(start_mark)
+
+        # Determine the indentation level and go to the first non-empty line.
+        min_indent = self.indent+1
+        if min_indent < 1:
+            min_indent = 1
+        if increment is None:
+            breaks, max_indent, end_mark = self.scan_block_scalar_indentation()
+            indent = max(min_indent, max_indent)
+        else:
+            indent = min_indent+increment-1
+            breaks, end_mark = self.scan_block_scalar_breaks(indent)
+        line_break = u''
+
+        # Scan the inner part of the block scalar.
+        while self.column == indent and self.peek() != u'\0':
+            chunks.extend(breaks)
+            leading_non_space = self.peek() not in u' \t'
+            length = 0
+            while self.peek(length) not in u'\0\r\n\x85\u2028\u2029':
+                length += 1
+            chunks.append(self.prefix(length))
+            self.forward(length)
+            line_break = self.scan_line_break()
+            breaks, end_mark = self.scan_block_scalar_breaks(indent)
+            if self.column == indent and self.peek() != u'\0':
+
+                # Unfortunately, folding rules are ambiguous.
+                #
+                # This is the folding according to the specification:
+                
+                if folded and line_break == u'\n'   \
+                        and leading_non_space and self.peek() not in u' \t':
+                    if not breaks:
+                        chunks.append(u' ')
+                else:
+                    chunks.append(line_break)
+                
+                # This is Clark Evans's interpretation (also in the spec
+                # examples):
+                #
+                #if folded and line_break == u'\n':
+                #    if not breaks:
+                #        if self.peek() not in ' \t':
+                #            chunks.append(u' ')
+                #        else:
+                #            chunks.append(line_break)
+                #else:
+                #    chunks.append(line_break)
+            else:
+                break
+
+        # Chomp the tail.
+        if chomping is not False:
+            chunks.append(line_break)
+        if chomping is True:
+            chunks.extend(breaks)
+
+        # We are done.
+        return ScalarToken(u''.join(chunks), False, start_mark, end_mark,
+                style)
+
+    def scan_block_scalar_indicators(self, start_mark):
+        # See the specification for details.
+        chomping = None
+        increment = None
+        ch = self.peek()
+        if ch in u'+-':
+            if ch == '+':
+                chomping = True
+            else:
+                chomping = False
+            self.forward()
+            ch = self.peek()
+            if ch in u'0123456789':
+                increment = int(ch)
+                if increment == 0:
+                    raise ScannerError("while scanning a block scalar", start_mark,
+                            "expected indentation indicator in the range 1-9, but found 0",
+                            self.get_mark())
+                self.forward()
+        elif ch in u'0123456789':
+            increment = int(ch)
+            if increment == 0:
+                raise ScannerError("while scanning a block scalar", start_mark,
+                        "expected indentation indicator in the range 1-9, but found 0",
+                        self.get_mark())
+            self.forward()
+            ch = self.peek()
+            if ch in u'+-':
+                if ch == '+':
+                    chomping = True
+                else:
+                    chomping = False
+                self.forward()
+        ch = self.peek()
+        if ch not in u'\0 \r\n\x85\u2028\u2029':
+            raise ScannerError("while scanning a block scalar", start_mark,
+                    "expected chomping or indentation indicators, but found %r"
+                        % ch.encode('utf-8'), self.get_mark())
+        return chomping, increment
+
+    def scan_block_scalar_ignored_line(self, start_mark):
+        # See the specification for details.
+        while self.peek() == u' ':
+            self.forward()
+        if self.peek() == u'#':
+            while self.peek() not in u'\0\r\n\x85\u2028\u2029':
+                self.forward()
+        ch = self.peek()
+        if ch not in u'\0\r\n\x85\u2028\u2029':
+            raise ScannerError("while scanning a block scalar", start_mark,
+                    "expected a comment or a line break, but found %r"
+                        % ch.encode('utf-8'), self.get_mark())
+        self.scan_line_break()
+
+    def scan_block_scalar_indentation(self):
+        # See the specification for details.
+        chunks = []
+        max_indent = 0
+        end_mark = self.get_mark()
+        while self.peek() in u' \r\n\x85\u2028\u2029':
+            if self.peek() != u' ':
+                chunks.append(self.scan_line_break())
+                end_mark = self.get_mark()
+            else:
+                self.forward()
+                if self.column > max_indent:
+                    max_indent = self.column
+        return chunks, max_indent, end_mark
+
+    def scan_block_scalar_breaks(self, indent):
+        # See the specification for details.
+        chunks = []
+        end_mark = self.get_mark()
+        while self.column < indent and self.peek() == u' ':
+            self.forward()
+        while self.peek() in u'\r\n\x85\u2028\u2029':
+            chunks.append(self.scan_line_break())
+            end_mark = self.get_mark()
+            while self.column < indent and self.peek() == u' ':
+                self.forward()
+        return chunks, end_mark
+
+    def scan_flow_scalar(self, style):
+        # See the specification for details.
+        # Note that we loose indentation rules for quoted scalars. Quoted
+        # scalars don't need to adhere indentation because " and ' clearly
+        # mark the beginning and the end of them. Therefore we are less
+        # restrictive then the specification requires. We only need to check
+        # that document separators are not included in scalars.
+        if style == '"':
+            double = True
+        else:
+            double = False
+        chunks = []
+        start_mark = self.get_mark()
+        quote = self.peek()
+        self.forward()
+        chunks.extend(self.scan_flow_scalar_non_spaces(double, start_mark))
+        while self.peek() != quote:
+            chunks.extend(self.scan_flow_scalar_spaces(double, start_mark))
+            chunks.extend(self.scan_flow_scalar_non_spaces(double, start_mark))
+        self.forward()
+        end_mark = self.get_mark()
+        return ScalarToken(u''.join(chunks), False, start_mark, end_mark,
+                style)
+
+    ESCAPE_REPLACEMENTS = {
+        u'0':   u'\0',
+        u'a':   u'\x07',
+        u'b':   u'\x08',
+        u't':   u'\x09',
+        u'\t':  u'\x09',
+        u'n':   u'\x0A',
+        u'v':   u'\x0B',
+        u'f':   u'\x0C',
+        u'r':   u'\x0D',
+        u'e':   u'\x1B',
+        u' ':   u'\x20',
+        u'\"':  u'\"',
+        u'\\':  u'\\',
+        u'N':   u'\x85',
+        u'_':   u'\xA0',
+        u'L':   u'\u2028',
+        u'P':   u'\u2029',
+    }
+
+    ESCAPE_CODES = {
+        u'x':   2,
+        u'u':   4,
+        u'U':   8,
+    }
+
+    def scan_flow_scalar_non_spaces(self, double, start_mark):
+        # See the specification for details.
+        chunks = []
+        while True:
+            length = 0
+            while self.peek(length) not in u'\'\"\\\0 \t\r\n\x85\u2028\u2029':
+                length += 1
+            if length:
+                chunks.append(self.prefix(length))
+                self.forward(length)
+            ch = self.peek()
+            if not double and ch == u'\'' and self.peek(1) == u'\'':
+                chunks.append(u'\'')
+                self.forward(2)
+            elif (double and ch == u'\'') or (not double and ch in u'\"\\'):
+                chunks.append(ch)
+                self.forward()
+            elif double and ch == u'\\':
+                self.forward()
+                ch = self.peek()
+                if ch in self.ESCAPE_REPLACEMENTS:
+                    chunks.append(self.ESCAPE_REPLACEMENTS[ch])
+                    self.forward()
+                elif ch in self.ESCAPE_CODES:
+                    length = self.ESCAPE_CODES[ch]
+                    self.forward()
+                    for k in range(length):
+                        if self.peek(k) not in u'0123456789ABCDEFabcdef':
+                            raise ScannerError("while scanning a double-quoted scalar", start_mark,
+                                    "expected escape sequence of %d hexdecimal numbers, but found %r" %
+                                        (length, self.peek(k).encode('utf-8')), self.get_mark())
+                    code = int(self.prefix(length), 16)
+                    chunks.append(unichr(code))
+                    self.forward(length)
+                elif ch in u'\r\n\x85\u2028\u2029':
+                    self.scan_line_break()
+                    chunks.extend(self.scan_flow_scalar_breaks(double, start_mark))
+                else:
+                    raise ScannerError("while scanning a double-quoted scalar", start_mark,
+                            "found unknown escape character %r" % ch.encode('utf-8'), self.get_mark())
+            else:
+                return chunks
+
+    def scan_flow_scalar_spaces(self, double, start_mark):
+        # See the specification for details.
+        chunks = []
+        length = 0
+        while self.peek(length) in u' \t':
+            length += 1
+        whitespaces = self.prefix(length)
+        self.forward(length)
+        ch = self.peek()
+        if ch == u'\0':
+            raise ScannerError("while scanning a quoted scalar", start_mark,
+                    "found unexpected end of stream", self.get_mark())
+        elif ch in u'\r\n\x85\u2028\u2029':
+            line_break = self.scan_line_break()
+            breaks = self.scan_flow_scalar_breaks(double, start_mark)
+            if line_break != u'\n':
+                chunks.append(line_break)
+            elif not breaks:
+                chunks.append(u' ')
+            chunks.extend(breaks)
+        else:
+            chunks.append(whitespaces)
+        return chunks
+
+    def scan_flow_scalar_breaks(self, double, start_mark):
+        # See the specification for details.
+        chunks = []
+        while True:
+            # Instead of checking indentation, we check for document
+            # separators.
+            prefix = self.prefix(3)
+            if (prefix == u'---' or prefix == u'...')   \
+                    and self.peek(3) in u'\0 \t\r\n\x85\u2028\u2029':
+                raise ScannerError("while scanning a quoted scalar", start_mark,
+                        "found unexpected document separator", self.get_mark())
+            while self.peek() in u' \t':
+                self.forward()
+            if self.peek() in u'\r\n\x85\u2028\u2029':
+                chunks.append(self.scan_line_break())
+            else:
+                return chunks
+
+    def scan_plain(self):
+        # See the specification for details.
+        # We add an additional restriction for the flow context:
+        #   plain scalars in the flow context cannot contain ',', ':' and '?'.
+        # We also keep track of the `allow_simple_key` flag here.
+        # Indentation rules are loosed for the flow context.
+        chunks = []
+        start_mark = self.get_mark()
+        end_mark = start_mark
+        indent = self.indent+1
+        # We allow zero indentation for scalars, but then we need to check for
+        # document separators at the beginning of the line.
+        #if indent == 0:
+        #    indent = 1
+        spaces = []
+        while True:
+            length = 0
+            if self.peek() == u'#':
+                break
+            while True:
+                ch = self.peek(length)
+                if ch in u'\0 \t\r\n\x85\u2028\u2029'   \
+                        or (not self.flow_level and ch == u':' and
+                                self.peek(length+1) in u'\0 \t\r\n\x85\u2028\u2029') \
+                        or (self.flow_level and ch in u',:?[]{}'):
+                    break
+                length += 1
+            # It's not clear what we should do with ':' in the flow context.
+            if (self.flow_level and ch == u':'
+                    and self.peek(length+1) not in u'\0 \t\r\n\x85\u2028\u2029,[]{}'):
+                self.forward(length)
+                raise ScannerError("while scanning a plain scalar", start_mark,
+                    "found unexpected ':'", self.get_mark(),
+                    "Please check http://pyyaml.org/wiki/YAMLColonInFlowContext for details.")
+            if length == 0:
+                break
+            self.allow_simple_key = False
+            chunks.extend(spaces)
+            chunks.append(self.prefix(length))
+            self.forward(length)
+            end_mark = self.get_mark()
+            spaces = self.scan_plain_spaces(indent, start_mark)
+            if not spaces or self.peek() == u'#' \
+                    or (not self.flow_level and self.column < indent):
+                break
+        return ScalarToken(u''.join(chunks), True, start_mark, end_mark)
+
+    def scan_plain_spaces(self, indent, start_mark):
+        # See the specification for details.
+        # The specification is really confusing about tabs in plain scalars.
+        # We just forbid them completely. Do not use tabs in YAML!
+        chunks = []
+        length = 0
+        while self.peek(length) in u' ':
+            length += 1
+        whitespaces = self.prefix(length)
+        self.forward(length)
+        ch = self.peek()
+        if ch in u'\r\n\x85\u2028\u2029':
+            line_break = self.scan_line_break()
+            self.allow_simple_key = True
+            prefix = self.prefix(3)
+            if (prefix == u'---' or prefix == u'...')   \
+                    and self.peek(3) in u'\0 \t\r\n\x85\u2028\u2029':
+                return
+            breaks = []
+            while self.peek() in u' \r\n\x85\u2028\u2029':
+                if self.peek() == ' ':
+                    self.forward()
+                else:
+                    breaks.append(self.scan_line_break())
+                    prefix = self.prefix(3)
+                    if (prefix == u'---' or prefix == u'...')   \
+                            and self.peek(3) in u'\0 \t\r\n\x85\u2028\u2029':
+                        return
+            if line_break != u'\n':
+                chunks.append(line_break)
+            elif not breaks:
+                chunks.append(u' ')
+            chunks.extend(breaks)
+        elif whitespaces:
+            chunks.append(whitespaces)
+        return chunks
+
+    def scan_tag_handle(self, name, start_mark):
+        # See the specification for details.
+        # For some strange reasons, the specification does not allow '_' in
+        # tag handles. I have allowed it anyway.
+        ch = self.peek()
+        if ch != u'!':
+            raise ScannerError("while scanning a %s" % name, start_mark,
+                    "expected '!', but found %r" % ch.encode('utf-8'),
+                    self.get_mark())
+        length = 1
+        ch = self.peek(length)
+        if ch != u' ':
+            while u'0' <= ch <= u'9' or u'A' <= ch <= u'Z' or u'a' <= ch <= u'z'    \
+                    or ch in u'-_':
+                length += 1
+                ch = self.peek(length)
+            if ch != u'!':
+                self.forward(length)
+                raise ScannerError("while scanning a %s" % name, start_mark,
+                        "expected '!', but found %r" % ch.encode('utf-8'),
+                        self.get_mark())
+            length += 1
+        value = self.prefix(length)
+        self.forward(length)
+        return value
+
+    def scan_tag_uri(self, name, start_mark):
+        # See the specification for details.
+        # Note: we do not check if URI is well-formed.
+        chunks = []
+        length = 0
+        ch = self.peek(length)
+        while u'0' <= ch <= u'9' or u'A' <= ch <= u'Z' or u'a' <= ch <= u'z'    \
+                or ch in u'-;/?:@&=+$,_.!~*\'()[]%':
+            if ch == u'%':
+                chunks.append(self.prefix(length))
+                self.forward(length)
+                length = 0
+                chunks.append(self.scan_uri_escapes(name, start_mark))
+            else:
+                length += 1
+            ch = self.peek(length)
+        if length:
+            chunks.append(self.prefix(length))
+            self.forward(length)
+            length = 0
+        if not chunks:
+            raise ScannerError("while parsing a %s" % name, start_mark,
+                    "expected URI, but found %r" % ch.encode('utf-8'),
+                    self.get_mark())
+        return u''.join(chunks)
+
+    def scan_uri_escapes(self, name, start_mark):
+        # See the specification for details.
+        bytes = []
+        mark = self.get_mark()
+        while self.peek() == u'%':
+            self.forward()
+            for k in range(2):
+                if self.peek(k) not in u'0123456789ABCDEFabcdef':
+                    raise ScannerError("while scanning a %s" % name, start_mark,
+                            "expected URI escape sequence of 2 hexdecimal numbers, but found %r" %
+                                (self.peek(k).encode('utf-8')), self.get_mark())
+            bytes.append(chr(int(self.prefix(2), 16)))
+            self.forward(2)
+        try:
+            value = unicode(''.join(bytes), 'utf-8')
+        except UnicodeDecodeError, exc:
+            raise ScannerError("while scanning a %s" % name, start_mark, str(exc), mark)
+        return value
+
+    def scan_line_break(self):
+        # Transforms:
+        #   '\r\n'      :   '\n'
+        #   '\r'        :   '\n'
+        #   '\n'        :   '\n'
+        #   '\x85'      :   '\n'
+        #   '\u2028'    :   '\u2028'
+        #   '\u2029     :   '\u2029'
+        #   default     :   ''
+        ch = self.peek()
+        if ch in u'\r\n\x85':
+            if self.prefix(2) == u'\r\n':
+                self.forward(2)
+            else:
+                self.forward()
+            return u'\n'
+        elif ch in u'\u2028\u2029':
+            self.forward()
+            return ch
+        return u''
+
+#try:
+#    import psyco
+#    psyco.bind(Scanner)
+#except ImportError:
+#    pass
+
diff --git a/tablib/packages/yaml/serializer.py b/tablib/packages/yaml/serializer.py
new file mode 100644
index 0000000..0bf1e96
--- /dev/null
+++ b/tablib/packages/yaml/serializer.py
@@ -0,0 +1,111 @@
+
+__all__ = ['Serializer', 'SerializerError']
+
+from error import YAMLError
+from events import *
+from nodes import *
+
+class SerializerError(YAMLError):
+    pass
+
+class Serializer(object):
+
+    ANCHOR_TEMPLATE = u'id%03d'
+
+    def __init__(self, encoding=None,
+            explicit_start=None, explicit_end=None, version=None, tags=None):
+        self.use_encoding = encoding
+        self.use_explicit_start = explicit_start
+        self.use_explicit_end = explicit_end
+        self.use_version = version
+        self.use_tags = tags
+        self.serialized_nodes = {}
+        self.anchors = {}
+        self.last_anchor_id = 0
+        self.closed = None
+
+    def open(self):
+        if self.closed is None:
+            self.emit(StreamStartEvent(encoding=self.use_encoding))
+            self.closed = False
+        elif self.closed:
+            raise SerializerError("serializer is closed")
+        else:
+            raise SerializerError("serializer is already opened")
+
+    def close(self):
+        if self.closed is None:
+            raise SerializerError("serializer is not opened")
+        elif not self.closed:
+            self.emit(StreamEndEvent())
+            self.closed = True
+
+    #def __del__(self):
+    #    self.close()
+
+    def serialize(self, node):
+        if self.closed is None:
+            raise SerializerError("serializer is not opened")
+        elif self.closed:
+            raise SerializerError("serializer is closed")
+        self.emit(DocumentStartEvent(explicit=self.use_explicit_start,
+            version=self.use_version, tags=self.use_tags))
+        self.anchor_node(node)
+        self.serialize_node(node, None, None)
+        self.emit(DocumentEndEvent(explicit=self.use_explicit_end))
+        self.serialized_nodes = {}
+        self.anchors = {}
+        self.last_anchor_id = 0
+
+    def anchor_node(self, node):
+        if node in self.anchors:
+            if self.anchors[node] is None:
+                self.anchors[node] = self.generate_anchor(node)
+        else:
+            self.anchors[node] = None
+            if isinstance(node, SequenceNode):
+                for item in node.value:
+                    self.anchor_node(item)
+            elif isinstance(node, MappingNode):
+                for key, value in node.value:
+                    self.anchor_node(key)
+                    self.anchor_node(value)
+
+    def generate_anchor(self, node):
+        self.last_anchor_id += 1
+        return self.ANCHOR_TEMPLATE % self.last_anchor_id
+
+    def serialize_node(self, node, parent, index):
+        alias = self.anchors[node]
+        if node in self.serialized_nodes:
+            self.emit(AliasEvent(alias))
+        else:
+            self.serialized_nodes[node] = True
+            self.descend_resolver(parent, index)
+            if isinstance(node, ScalarNode):
+                detected_tag = self.resolve(ScalarNode, node.value, (True, False))
+                default_tag = self.resolve(ScalarNode, node.value, (False, True))
+                implicit = (node.tag == detected_tag), (node.tag == default_tag)
+                self.emit(ScalarEvent(alias, node.tag, implicit, node.value,
+                    style=node.style))
+            elif isinstance(node, SequenceNode):
+                implicit = (node.tag
+                            == self.resolve(SequenceNode, node.value, True))
+                self.emit(SequenceStartEvent(alias, node.tag, implicit,
+                    flow_style=node.flow_style))
+                index = 0
+                for item in node.value:
+                    self.serialize_node(item, node, index)
+                    index += 1
+                self.emit(SequenceEndEvent())
+            elif isinstance(node, MappingNode):
+                implicit = (node.tag
+                            == self.resolve(MappingNode, node.value, True))
+                self.emit(MappingStartEvent(alias, node.tag, implicit,
+                    flow_style=node.flow_style))
+                for key, value in node.value:
+                    self.serialize_node(key, node, None)
+                    self.serialize_node(value, node, key)
+                self.emit(MappingEndEvent())
+            self.ascend_resolver()
+
diff --git a/tablib/packages/yaml/tokens.py b/tablib/packages/yaml/tokens.py
new file mode 100644
index 0000000..4d0b48a
--- /dev/null
+++ b/tablib/packages/yaml/tokens.py
@@ -0,0 +1,104 @@
+
+class Token(object):
+    def __init__(self, start_mark, end_mark):
+        self.start_mark = start_mark
+        self.end_mark = end_mark
+    def __repr__(self):
+        attributes = [key for key in self.__dict__
+                if not key.endswith('_mark')]
+        attributes.sort()
+        arguments = ', '.join(['%s=%r' % (key, getattr(self, key))
+                for key in attributes])
+        return '%s(%s)' % (self.__class__.__name__, arguments)
+
+#class BOMToken(Token):
+#    id = '<byte order mark>'
+
+class DirectiveToken(Token):
+    id = '<directive>'
+    def __init__(self, name, value, start_mark, end_mark):
+        self.name = name
+        self.value = value
+        self.start_mark = start_mark
+        self.end_mark = end_mark
+
+class DocumentStartToken(Token):
+    id = '<document start>'
+
+class DocumentEndToken(Token):
+    id = '<document end>'
+
+class StreamStartToken(Token):
+    id = '<stream start>'
+    def __init__(self, start_mark=None, end_mark=None,
+            encoding=None):
+        self.start_mark = start_mark
+        self.end_mark = end_mark
+        self.encoding = encoding
+
+class StreamEndToken(Token):
+    id = '<stream end>'
+
+class BlockSequenceStartToken(Token):
+    id = '<block sequence start>'
+
+class BlockMappingStartToken(Token):
+    id = '<block mapping start>'
+
+class BlockEndToken(Token):
+    id = '<block end>'
+
+class FlowSequenceStartToken(Token):
+    id = '['
+
+class FlowMappingStartToken(Token):
+    id = '{'
+
+class FlowSequenceEndToken(Token):
+    id = ']'
+
+class FlowMappingEndToken(Token):
+    id = '}'
+
+class KeyToken(Token):
+    id = '?'
+
+class ValueToken(Token):
+    id = ':'
+
+class BlockEntryToken(Token):
+    id = '-'
+
+class FlowEntryToken(Token):
+    id = ','
+
+class AliasToken(Token):
+    id = '<alias>'
+    def __init__(self, value, start_mark, end_mark):
+        self.value = value
+        self.start_mark = start_mark
+        self.end_mark = end_mark
+
+class AnchorToken(Token):
+    id = '<anchor>'
+    def __init__(self, value, start_mark, end_mark):
+        self.value = value
+        self.start_mark = start_mark
+        self.end_mark = end_mark
+
+class TagToken(Token):
+    id = '<tag>'
+    def __init__(self, value, start_mark, end_mark):
+        self.value = value
+        self.start_mark = start_mark
+        self.end_mark = end_mark
+
+class ScalarToken(Token):
+    id = '<scalar>'
+    def __init__(self, value, plain, start_mark, end_mark, style=None):
+        self.value = value
+        self.plain = plain
+        self.start_mark = start_mark
+        self.end_mark = end_mark
+        self.style = style
+