Merge branch 'release/0.9.5'

61 files changed, 18796 insertions, 238 deletions

diff --git a/HACKING b/HACKING
new file mode 100644
index 0000000..018f9b7
--- /dev/null
+++ b/HACKING
@@ -0,0 +1,14 @@
+Where possible, please follow PEP8 with regard to coding style. Sometimes the line 
+length restriction is too hard to follow, so don't bend over backwards there.
+
+Triple-quotes should always be """, single quotes are ' unless using "
+would result in less escaping within the string.
+
+All modules, functions, and methods should be well documented reStructuredText for 
+Sphinx AutoDoc.
+
+All functionality should be available in pure Python. Optional C (via Cython)
+implementations may be written for performance reasons, but should never
+replace the Python implementation.
+
+Lastly, don't take yourself too seriously :)
\ No newline at end of file
diff --git a/HISTORY.rst b/HISTORY.rst
index 4842a45..78b8581 100644
--- a/HISTORY.rst
+++ b/HISTORY.rst
@@ -1,6 +1,15 @@
 History
 -------
 
+0.9.5 (2011-03-24)
+++++++++++++++++++
+
+* Python 3.1, Python 3.2 Support (same code base!)
+* Formatter callback support
+* Various bug fixes
+
+
+
 0.9.4 (2011-02-18)
 ++++++++++++++++++
 
diff --git a/docs/development.rst b/docs/development.rst
index 77af330..6255d5e 100644
--- a/docs/development.rst
+++ b/docs/development.rst
@@ -87,7 +87,7 @@ Adding New Formats
 
 Tablib welcomes new format additions! Format suggestions include:
 
-* Tab Seperated Values
+* Tab Separated Values
 * MySQL Dump
 * HTML Table
 
@@ -178,7 +178,7 @@ Every commit made to the **develop** branch is automatically tested and inspecte
 
 Anyone may view the build status and history at any time.
 
-    http://git.kennethreitz.com/ci/
+    http://ci.kennethreitz.com/
 
 
 If you are trustworthy and plan to contribute to tablib on a regular basis, please contact `Kenneth Reitz`_ to get an account on the Hudson Server. 
diff --git a/docs/index.rst b/docs/index.rst
index 4726d7b..77ce7cf 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -3,8 +3,10 @@
    You can adapt this file completely to your liking, but it should at least
    contain the root `toctree` directive.
 
-Tablib: Pythonic Tabular Data 
-=============================
+Tablib: Pythonic Tabular Datasets 
+=================================
+
+Release |version|.
 
 .. Contents:
 .. 
diff --git a/docs/install.rst b/docs/install.rst
index 9b9a519..b6c3f31 100644
--- a/docs/install.rst
+++ b/docs/install.rst
@@ -55,7 +55,7 @@ However, if performance is important to you (and it should be), you can install
 
 	$ pip install PyYAML
 
-If you're using Python 2.5 (currently unsupported), you should also install the **simplejson** module. If you're using Python 2.6+, the built-in **json** module is already optimized and in use. ::
+If you're using Python 2.5, you should also install the **simplejson** module (pip will do this for you). If you're using Python 2.6+, the built-in **json** module is already optimized and in use. ::
 
 	$ pip install simplejson
 
diff --git a/docs/intro.rst b/docs/intro.rst
index c2d75b2..719133d 100644
--- a/docs/intro.rst
+++ b/docs/intro.rst
@@ -36,6 +36,31 @@ Tablib is released under terms of `The MIT License`_.
 .. _`The MIT License`: http://www.opensource.org/licenses/mit-license.php
 
 
+.. _license:
+
+Tablib License
+--------------
+
+Copyright (c) 2011 Kenneth Reitz.
+
+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.
+
 
 .. _pythonsupport:
 
@@ -44,8 +69,12 @@ Pythons Supported
 
 At this time, the following Python platforms are officially supported: 
 
-* Python 2.6
-* Python 2.7
+* cPython 2.5
+* cPython 2.6
+* cPython 2.7
+* cPython 3.1
+* cPython 3.2
+* PyPy-c 1.4
 
 Support for other Pythons will be rolled out soon.
 
diff --git a/setup.py b/setup.py
index c9974b0..2aa532a 100644
--- a/setup.py
+++ b/setup.py
@@ -17,12 +17,12 @@ if sys.argv[-1] == "publish":
 
 required = []
 
-if sys.version_info < (2,6):
+if sys.version_info[:2] < (2,6):
     required.append('simplejson')
 
 setup(
     name='tablib',
-    version='0.9.4',
+    version='0.9.5',
     description='Format agnostic tabular data library (XLS, JSON, YAML, CSV)',
     long_description=open('README.rst').read() + '\n\n' +
                      open('HISTORY.rst').read(),
@@ -46,7 +46,8 @@ setup(
         'Programming Language :: Python :: 2.5',
         'Programming Language :: Python :: 2.6',
         'Programming Language :: Python :: 2.7',
-        # 'Programming Language :: Python :: 3.0',
-        # 'Programming Language :: Python :: 3.1',
+        'Programming Language :: Python :: 3.0',
+        'Programming Language :: Python :: 3.1',
+        'Programming Language :: Python :: 3.2',
     ),
 )
diff --git a/tablib/__init__.py b/tablib/__init__.py
index c2205b6..dc85527 100644
--- a/tablib/__init__.py
+++ b/tablib/__init__.py
@@ -1,8 +1,16 @@
 """ Tablib.
 """
 
-from tablib.core import (
-    Databook, Dataset, detect, import_set, 
-    InvalidDatasetType, InvalidDimensions, UnsupportedFormat
-)
+import sys
+if sys.version_info[0:1] > (2, 5):
+    from tablib.core import (
+        Databook, Dataset, detect, import_set, 
+        InvalidDatasetType, InvalidDimensions, UnsupportedFormat
+    )
+    
+else:
+    from tablib.core25 import (
+        Databook, Dataset, detect, import_set, 
+        InvalidDatasetType, InvalidDimensions, UnsupportedFormat
+    )
 
diff --git a/tablib/core.py b/tablib/core.py
index dfbcb6a..8ef6312 100644
--- a/tablib/core.py
+++ b/tablib/core.py
@@ -13,6 +13,7 @@ from copy import copy
 from operator import itemgetter
 
 from tablib import formats
+import collections
 
 try:
     from collections import OrderedDict
@@ -26,6 +27,7 @@ __build__ = 0x000904
 __author__ = 'Kenneth Reitz'
 __license__ = 'MIT'
 __copyright__ = 'Copyright 2011 Kenneth Reitz'
+__docformat__ = 'restructuredtext'
 
 
 class Row(object):
@@ -62,7 +64,7 @@ class Row(object):
         return {slot: [getattr(self, slot) for slot in self.__slots__]}
 
     def __setstate__(self, state):
-        for (k, v) in state.items(): setattr(self, k, v)
+        for (k, v) in list(state.items()): setattr(self, k, v)
 
     def append(self, value):
         self._row.append(value)
@@ -88,7 +90,7 @@ class Row(object):
 
         if tag == None:
             return False
-        elif isinstance(tag, basestring):
+        elif isinstance(tag, str):
             return (tag in self.tags)
         else:
             return bool(len(set(tag) & set(self.tags)))
@@ -136,6 +138,9 @@ class Dataset(object):
 
         # ('title', index) tuples
         self._separators = []
+        
+        # (column, callback) tuples
+        self._formatters = []
 
         try:
             self.headers = kwargs['headers']
@@ -155,7 +160,7 @@ class Dataset(object):
 
 
     def __getitem__(self, key):
-        if isinstance(key, basestring):
+        if isinstance(key, str):
             if key in self.headers:
                 pos = self.headers.index(key) # get 'key' index from each data
                 return [row[pos] for row in self._data]
@@ -175,7 +180,7 @@ class Dataset(object):
 
 
     def __delitem__(self, key):
-        if isinstance(key, basestring):
+        if isinstance(key, str):
 
             if key in self.headers:
 
@@ -236,13 +241,29 @@ class Dataset(object):
     def _package(self, dicts=True):
         """Packages Dataset into lists of dictionaries for transmission."""
 
+        _data = list(self._data)
+        
+        # Execute formatters
+        if self._formatters:
+            for row_i, row in enumerate(_data):
+                for col, callback in self._formatters:
+                    try:                        
+                        if col is None:
+                            for j, c in enumerate(row):
+                                _data[row_i][j] = callback(c)
+                        else:
+                            _data[row_i][col] = callback(row[col])
+                    except IndexError:
+                        raise InvalidDatasetIndex
+                        
+
         if self.headers:
             if dicts:
-                data = [OrderedDict(zip(self.headers, data_row)) for data_row in self ._data]
+                data = [OrderedDict(list(zip(self.headers, data_row))) for data_row in _data]
             else:
-                data = [list(self.headers)] + list(self._data)
+                data = [list(self.headers)] + list(_data)
         else:
-            data = [list(row) for row in self._data]
+            data = [list(row) for row in _data]
 
         return data
 
@@ -257,8 +278,8 @@ class Dataset(object):
         else:
             header = []
 
-        if len(col) == 1 and callable(col[0]):
-            col = map(col[0], self._data)
+        if len(col) == 1 and isinstance(col[0], collections.Callable):
+            col = list(map(col[0], self._data))
         col = tuple(header + col)
 
         return col
@@ -347,9 +368,9 @@ class Dataset(object):
         # if list of objects
         elif isinstance(pickle[0], dict):
             self.wipe()
-            self.headers = pickle[0].keys()
+            self.headers = list(pickle[0].keys())
             for row in pickle:
-                self.append(Row(row.values()))
+                self.append(Row(list(row.values())))
         else:
             raise UnsupportedFormat
 
@@ -385,6 +406,7 @@ class Dataset(object):
         """
         pass
 
+
     @property
     def tsv():
         """A TSV representation of the :class:`Dataset` object. The top row will contain
@@ -469,6 +491,29 @@ class Dataset(object):
         self.insert_separator(index, text)
 
 
+    def add_formatter(self, col, handler):
+        """Adds a :ref:`formatter` to the :class:`Dataset`.
+        
+        .. versionadded:: 0.9.5
+           :param col: column to. Accepts index int or header str.
+           :param handler: reference to callback function to execute 
+           against each cell value.
+        """
+        
+        if isinstance(col, str):
+            if col in self.headers:
+                col = self.headers.index(col) # get 'key' index from each data
+            else:
+                raise KeyError
+        
+        if not col > self.width:
+            self._formatters.append((col, handler))
+        else:
+            raise InvalidDatasetIndex
+        
+        return True
+        
+
     def insert(self, index, row=None, col=None, header=None, tags=list()):
         """Inserts a row or column to the :class:`Dataset` at the given index.
 
@@ -504,8 +549,8 @@ class Dataset(object):
             col = list(col)
 
             # Callable Columns...
-            if len(col) == 1 and callable(col[0]):
-                col = map(col[0], self._data)
+            if len(col) == 1 and isinstance(col[0], collections.Callable):
+                col = list(map(col[0], self._data))
 
             col = self._clean_col(col)
             self._validate(col=col)
@@ -543,7 +588,7 @@ class Dataset(object):
         Returns a new :class:`Dataset` instance where columns have been
         sorted."""
         
-        if isinstance(col, basestring):
+        if isinstance(col, str):
 
             if not self.headers:
                 raise HeadersNeeded
@@ -658,12 +703,14 @@ class Dataset(object):
 
         return _dset
 
+
     def wipe(self):
         """Removes all content and headers from the :class:`Dataset` object."""
         self._data = list()
         self.__headers = None
 
 
+
 class Databook(object):
     """A book of :class:`Dataset` objects.
     """
@@ -748,7 +795,7 @@ def import_set(stream):
         format.import_set(data, stream)
         return data
 
-    except AttributeError, e:
+    except AttributeError as e:
         return None
 
 
@@ -758,6 +805,9 @@ class InvalidDatasetType(Exception):
 
 class InvalidDimensions(Exception):
     "Invalid size"
+    
+class InvalidDatasetIndex(Exception):
+    "Outside of Dataset size"
 
 class HeadersNeeded(Exception):
     "Header parameter must be given when appending a column in this Dataset."
diff --git a/tablib/core25.py b/tablib/core25.py
new file mode 100644
index 0000000..c8352a6
--- /dev/null
+++ b/tablib/core25.py
@@ -0,0 +1,818 @@
+# -*- coding: utf-8 -*-
+u"""
+    tablib.core
+    ~~~~~~~~~~~
+
+    This module implements the central Tablib objects.
+
+    :copyright: (c) 2011 by Kenneth Reitz.
+    :license: MIT, see LICENSE for more details.
+"""
+
+from copy import copy
+from operator import itemgetter
+
+from tablib import formats
+import collections
+from itertools import izip
+from itertools import imap
+
+try:
+    from collections import OrderedDict
+except ImportError:
+    from tablib.packages.ordereddict import OrderedDict
+
+
+__title__ = u'tablib'
+__version__ = u'0.9.4'
+__build__ = 0x000904
+__author__ = u'Kenneth Reitz'
+__license__ = u'MIT'
+__copyright__ = u'Copyright 2011 Kenneth Reitz'
+__docformat__ = u'restructuredtext'
+
+
+class Row(object):
+    u"""Internal Row object. Mainly used for filtering."""
+
+    __slots__ = [u'tuple', u'_row', u'tags']
+
+    def __init__(self, row=list(), tags=list()):
+        self._row = list(row)
+        self.tags = list(tags)
+
+    def __iter__(self):
+        return (col for col in self._row)
+
+    def __len__(self):
+        return len(self._row)
+
+    def __repr__(self):
+        return repr(self._row)
+
+    def __getslice__(self, i, j):
+        return self._row[i,j]
+
+    def __getitem__(self, i):
+        return self._row[i]
+
+    def __setitem__(self, i, value):
+        self._row[i] = value
+
+    def __delitem__(self, i):
+        del self._row[i]
+
+    def __getstate__(self):
+        return {slot: [getattr(self, slot) for slot in self.__slots__]}
+
+    def __setstate__(self, state):
+        for (k, v) in list(state.items()): setattr(self, k, v)
+
+    def append(self, value):
+        self._row.append(value)
+
+    def insert(self, index, value):
+        self._row.insert(index, value)
+
+    def __contains__(self, item):
+        return (item in self._row)
+
+    @property
+    def tuple(self):
+        u'''Tuple representation of :class:`Row`.'''
+        return tuple(self._row)
+
+    @property
+    def list(self):
+        u'''List representation of :class:`Row`.'''
+        return list(self._row)
+
+    def has_tag(self, tag):
+        u"""Returns true if current row contains tag."""
+
+        if tag == None:
+            return False
+        elif isinstance(tag, basestring):
+            return (tag in self.tags)
+        else:
+            return bool(len(set(tag) & set(self.tags)))
+                
+
+
+
+class Dataset(object):
+    u"""The :class:`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:: Format Attributes Definition
+
+     If you look at the code, the various output/import formats are not
+     defined within the :class:`Dataset` object. To add support for a new format, see
+     :ref:`Adding New Formats <newformats>`.
+
+    """
+
+    def __init__(self, *args, **kwargs):
+        self._data = list(Row(arg) for arg in args)
+        self.__headers = None
+
+        # ('title', index) tuples
+        self._separators = []
+        
+        # (column, callback) tuples
+        self._formatters = []
+
+        try:
+            self.headers = kwargs[u'headers']
+        except KeyError:
+            self.headers = None
+
+        try:
+            self.title = kwargs[u'title']
+        except KeyError:
+            self.title = None
+
+        self._register_formats()
+
+
+    def __len__(self):
+        return self.height
+
+
+    def __getitem__(self, key):
+        if isinstance(key, basestring):
+            if key in self.headers:
+                pos = self.headers.index(key) # get 'key' index from each data
+                return [row[pos] for row in self._data]
+            else:
+                raise KeyError
+        else:
+            _results = self._data[key]
+            if isinstance(_results, Row):
+                return _results.tuple
+            else:
+                return [result.tuple for result in _results]
+
+
+    def __setitem__(self, key, value):
+        self._validate(value)
+        self._data[key] = Row(value)
+
+
+    def __delitem__(self, key):
+        if isinstance(key, basestring):
+
+            if key in self.headers:
+
+                pos = self.headers.index(key)
+                del self.headers[pos]
+
+                for i, row in enumerate(self._data):
+
+                    del row[pos]
+                    self._data[i] = row
+            else:
+                raise KeyError
+        else:
+            del self._data[key]
+
+
+    def __repr__(self):
+        try:
+            return u'<%s dataset>' % (self.title.lower())
+        except AttributeError:
+            return u'<dataset object>'
+
+
+    @classmethod
+    def _register_formats(cls):
+        u"""Adds format properties."""
+        for fmt in formats.available:
+            try:
+                try:
+                    setattr(cls, fmt.title, property(fmt.export_set, fmt.import_set))
+                except AttributeError:
+                    setattr(cls, fmt.title, property(fmt.export_set))
+
+            except AttributeError:
+                pass
+
+
+    def _validate(self, row=None, col=None, safety=False):
+        u"""Assures size of every row in dataset is of proper proportions."""
+        if row:
+            is_valid = (len(row) == self.width) if self.width else True
+        elif col:
+            if len(col) < 1:
+                is_valid = True
+            else:
+                is_valid = (len(col) == self.height) if self.height else True
+        else:
+            is_valid = all((len(x) == self.width for x in self._data))
+
+        if is_valid:
+            return True
+        else:
+            if not safety:
+                raise InvalidDimensions
+            return False
+
+
+    def _package(self, dicts=True):
+        u"""Packages Dataset into lists of dictionaries for transmission."""
+
+        _data = list(self._data)
+        
+        # Execute formatters
+        if self._formatters:
+            for row_i, row in enumerate(_data):
+                for col, callback in self._formatters:
+                    try:                        
+                        if col is None:
+                            for j, c in enumerate(row):
+                                _data[row_i][j] = callback(c)
+                        else:
+                            _data[row_i][col] = callback(row[col])
+                    except IndexError:
+                        raise InvalidDatasetIndex
+                        
+
+        if self.headers:
+            if dicts:
+                data = [OrderedDict(list(izip(self.headers, data_row))) for data_row in _data]
+            else:
+                data = [list(self.headers)] + list(_data)
+        else:
+            data = [list(row) for row in _data]
+
+        return data
+
+
+    def _clean_col(self, col):
+        u"""Prepares the given column for insert/append."""
+
+        col = list(col)
+
+        if self.headers:
+            header = [col.pop(0)]
+        else:
+            header = []
+
+        if len(col) == 1 and hasattr(col[0], '__call__'):
+            col = list(imap(col[0], self._data))
+        col = tuple(header + col)
+
+        return col
+
+
+    @property
+    def height(self):
+        u"""The number of rows currently in the :class:`Dataset`.
+           Cannot be directly modified.
+        """
+        return len(self._data)
+
+
+    @property
+    def width(self):
+        u"""The number of columns currently in the :class:`Dataset`.
+           Cannot be directly modified.
+        """
+
+        try:
+            return len(self._data[0])
+        except IndexError:
+            try:
+                return len(self.headers)
+            except TypeError:
+                return 0
+
+
+    def _get_headers(self):
+        u"""An *optional* list of strings to be used for header rows and attribute names.
+
+        This must be set manually. The given list length must equal :class:`Dataset.width`.
+
+        """
+        return self.__headers
+
+
+    def _set_headers(self, collection):
+        u"""Validating headers setter."""
+        self._validate(collection)
+        if collection:
+            try:
+                self.__headers = list(collection)
+            except TypeError:
+                raise TypeError
+        else:
+            self.__headers = None
+
+    headers = property(_get_headers, _set_headers)
+
+    def _get_dict(self):
+        u"""A native Python representation of the :class:`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.json = '[{"last_name": "Adams","age": 90,"first_name": "John"}]'
+
+        """
+        return self._package()
+
+
+    def _set_dict(self, pickle):
+        u"""A 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 :class:`Dataset.dict` attribute. ::
+
+            data = tablib.Dataset()
+            data.dict = [{'age': 90, 'first_name': 'Kenneth', 'last_name': 'Reitz'}]
+
+        """
+
+        if not len(pickle):
+            return
+
+        # if list of rows
+        if isinstance(pickle[0], list):
+            self.wipe()
+            for row in pickle:
+                self.append(Row(row))
+
+        # if list of objects
+        elif isinstance(pickle[0], dict):
+            self.wipe()
+            self.headers = list(pickle[0].keys())
+            for row in pickle:
+                self.append(Row(list(row.values())))
+        else:
+            raise UnsupportedFormat
+
+    dict = property(_get_dict, _set_dict)
+
+
+    @property
+    def xls():
+        u"""An Excel Spreadsheet representation of the :class:`Dataset` object, with :ref:`seperators`. Cannot be set.
+
+         .. admonition:: Binary Warning
+
+             :class:`Dataset.xls` contains binary data, so make sure to write in binary mode::
+
+                with open('output.xls', 'wb') as f:
+                    f.write(data.xls)'
+        """
+        pass
+
+
+    @property
+    def csv():
+        u"""A CSV representation of the :class:`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 :class:`Dataset.csv` attribute. ::
+
+            data = tablib.Dataset()
+            data.csv = 'age, first_name, last_name\\n90, John, Adams'
+
+        Import assumes (for now) that headers exist.
+        """
+        pass
+
+
+    @property
+    def tsv():
+        u"""A TSV representation of the :class:`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 :class:`Dataset.tsv` attribute. ::
+
+            data = tablib.Dataset()
+            data.tsv = 'age\tfirst_name\tlast_name\\n90\tJohn\tAdams'
+
+        Import assumes (for now) that headers exist.
+        """
+
+    @property
+    def yaml():
+        u"""A YAML representation of the :class:`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 :class:`Dataset.json` attribute: ::
+
+            data = tablib.Dataset()
+            data.yaml = '- {age: 90, first_name: John, last_name: Adams}'
+
+        Import assumes (for now) that headers exist.
+        """
+        pass
+
+
+    @property
+    def json():
+        u"""A JSON representation of the :class:`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 :class:`Dataset.json` attribute: ::
+
+            data = tablib.Dataset()
+            data.json = '[{age: 90, first_name: "John", liast_name: "Adams"}]'
+
+        Import assumes (for now) that headers exist.
+        """
+
+    @property
+    def html():
+        u"""A HTML table representation of the :class:`Dataset` object. If
+        headers have been set, they will be used as table headers.
+
+        ..notice:: This method can be used for export only.
+        """
+        pass
+
+
+    def append(self, row=None, col=None, header=None, tags=list()):
+        u"""Adds a row or column to the :class:`Dataset`.
+        Usage is  :class:`Dataset.insert` for documentation.
+        """
+
+        if row is not None:
+            self.insert(self.height, row=row, tags=tags)
+        elif col is not None:
+            self.insert(self.width, col=col, header=header)
+
+
+    def insert_separator(self, index, text=u'-'):
+        u"""Adds a separator to :class:`Dataset` at given index."""
+
+        sep = (index, text)
+        self._separators.append(sep)
+
+
+    def append_separator(self, text=u'-'):
+        u"""Adds a :ref:`seperator <seperators>` to the :class:`Dataset`."""
+
+        # change offsets if headers are or aren't defined
+        if not self.headers:
+            index = self.height if self.height else 0
+        else:
+            index = (self.height + 1) if self.height else 1
+
+        self.insert_separator(index, text)
+
+
+    def add_formatter(self, col, handler):
+        u"""Adds a :ref:`formatter` to the :class:`Dataset`.
+        
+        .. versionadded:: 0.9.5
+           :param col: column to. Accepts index int or header str.
+           :param handler: reference to callback function to execute 
+           against each cell value.
+        """
+        
+        if isinstance(col, basestring):
+            if col in self.headers:
+                col = self.headers.index(col) # get 'key' index from each data
+            else:
+                raise KeyError
+        
+        if not col > self.width:
+            self._formatters.append((col, handler))
+        else:
+            raise InvalidDatasetIndex
+        
+        return True
+        
+
+    def insert(self, index, row=None, col=None, header=None, tags=list()):
+        u"""Inserts a row or column to the :class:`Dataset` at the given index.
+
+        Rows and columns inserted must be the correct size (height or width).
+
+        The default behaviour is to insert the given row to the :class:`Dataset`
+        object at the given index. If the ``col`` parameter is given, however,
+        a new column will be insert to the :class:`Dataset` object instead.
+
+        You can also insert a column of a single callable object, which will
+        add a new column with the return values of the callable each as an
+        item in the column. ::
+
+            data.append(col=random.randint)
+
+        See :ref:`dyncols` for an in-depth example.
+
+        .. versionchanged:: 0.9.0
+           If inserting a column, and :class:`Dataset.headers` is set, the
+           header attribute must be set, and will be considered the header for
+           that row.
+
+        .. versionadded:: 0.9.0
+           If inserting a row, you can add :ref:`tags <tags>` to the row you are inserting.
+           This gives you the ability to :class:`filter <Dataset.filter>` your
+           :class:`Dataset` later.
+
+        """
+        if row:
+            self._validate(row)
+            self._data.insert(index, Row(row, tags=tags))
+        elif col:
+            col = list(col)
+
+            # Callable Columns...
+            if len(col) == 1 and hasattr(col[0], '__call__'):
+                col = list(imap(col[0], self._data))
+
+            col = self._clean_col(col)
+            self._validate(col=col)
+
+            if self.headers:
+                # pop the first item off, add to headers
+                if not header:
+                    raise HeadersNeeded()
+                self.headers.insert(index, header)
+
+            if self.height and self.width:
+
+                for i, row in enumerate(self._data):
+
+                    row.insert(index, col[i])
+                    self._data[i] = row
+            else:
+                self._data = [Row([row]) for row in col]
+
+
+    def filter(self, tag):
+        u"""Returns a new instance of the :class:`Dataset`, excluding any rows
+        that do not contain the given :ref:`tags <tags>`.
+        """
+        _dset = copy(self)
+        _dset._data = [row for row in _dset._data if row.has_tag(tag)]
+
+        return _dset
+
+
+    def sort(self, col, reverse=False):
+        u"""Sort a :class:`Dataset` by a specific column, given string (for
+        header) or integer (for column index). The order can be reversed by
+        setting ``reverse`` to ``True``. 
+        Returns a new :class:`Dataset` instance where columns have been
+        sorted."""
+        
+        if isinstance(col, basestring):
+
+            if not self.headers:
+                raise HeadersNeeded
+
+            _sorted = sorted(self.dict, key=itemgetter(col), reverse=reverse)
+            _dset = Dataset(headers=self.headers)
+
+            for item in _sorted:
+                row = [item[key] for key in self.headers]
+                _dset.append(row=row)
+
+        else:
+            if self.headers:
+                col = self.headers[col]
+
+            _sorted = sorted(self.dict, key=itemgetter(col), reverse=reverse)
+            _dset = Dataset(headers=self.headers)
+
+            for item in _sorted:
+                if self.headers:
+                    row = [item[key] for key in self.headers]
+                else:
+                    row = item
+                _dset.append(row=row)
+
+
+        return _dset
+
+
+    def transpose(self):
+        u"""Transpose a :class:`Dataset`, turning rows into columns and vice
+        versa, returning a new ``Dataset`` instance. The first row of the
+        original instance becomes the new header row."""
+
+        # Don't transpose if there is no data
+        if not self:
+            return
+
+        _dset = Dataset()
+        # The first element of the headers stays in the headers,
+        # it is our "hinge" on which we rotate the data
+        new_headers = [self.headers[0]] + self[self.headers[0]]
+
+        _dset.headers = new_headers
+        for column in self.headers:
+
+            if column == self.headers[0]:
+                # It's in the headers, so skip it
+                continue
+
+            # Adding the column name as now they're a regular column
+            row_data = [column] + self[column]
+            row_data = Row(row_data)
+            _dset.append(row=row_data)
+
+        return _dset
+
+
+    def stack_rows(self, other):
+        u"""Stack two :class:`Dataset` instances together by
+        joining at the row level, and return new combined
+        ``Dataset`` instance."""
+
+        if not isinstance(other, Dataset):
+            return
+
+        if self.width != other.width:
+            raise InvalidDimensions
+
+        # Copy the source data
+        _dset = copy(self)
+
+        rows_to_stack = [row for row in _dset._data]
+        other_rows = [row for row in other._data]
+
+        rows_to_stack.extend(other_rows)
+        _dset._data = rows_to_stack
+
+        return _dset
+
+
+    def stack_columns(self, other):
+        u"""Stack two :class:`Dataset` instances together by
+        joining at the column level, and return a new
+        combined ``Dataset`` instance. If either ``Dataset``
+        has headers set, than the other must as well."""
+
+        if not isinstance(other, Dataset):
+            return
+
+        if self.headers or other.headers:
+            if not self.headers or not other.headers:
+                raise HeadersNeeded
+
+        if self.height != other.height:
+            raise InvalidDimensions
+
+        try:
+            new_headers = self.headers + other.headers
+        except TypeError:
+            new_headers = None
+
+        _dset = Dataset()
+
+        for column in self.headers:
+            _dset.append(col=self[column])
+
+        for column in other.headers:
+            _dset.append(col=other[column])
+
+        _dset.headers = new_headers
+
+        return _dset
+
+
+    def wipe(self):
+        u"""Removes all content and headers from the :class:`Dataset` object."""
+        self._data = list()
+        self.__headers = None
+
+
+
+class Databook(object):
+    u"""A book of :class:`Dataset` objects.
+    """
+
+    def __init__(self, sets=None):
+
+        if sets is None:
+            self._datasets = list()
+        else:
+            self._datasets = sets
+
+        self._register_formats()
+
+    def __repr__(self):
+        try:
+            return u'<%s databook>' % (self.title.lower())
+        except AttributeError:
+            return u'<databook object>'
+
+
+    def wipe(self):
+        u"""Removes all :class:`Dataset` objects from the :class:`Databook`."""
+        self._datasets = []
+
+
+    @classmethod
+    def _register_formats(cls):
+        u"""Adds format properties."""
+        for fmt in formats.available:
+            try:
+                try:
+                    setattr(cls, fmt.title, property(fmt.export_book, fmt.import_book))
+                except AttributeError:
+                    setattr(cls, fmt.title, property(fmt.export_book))
+
+            except AttributeError:
+                pass
+
+
+    def add_sheet(self, dataset):
+        u"""Adds given :class:`Dataset` to the :class:`Databook`."""
+        if type(dataset) is Dataset:
+            self._datasets.append(dataset)
+        else:
+            raise InvalidDatasetType
+
+
+    def _package(self):
+        u"""Packages :class:`Databook` for delivery."""
+        collector = []
+        for dset in self._datasets:
+            collector.append(OrderedDict(
+                title = dset.title,
+                data = dset.dict
+            ))
+        return collector
+
+
+    @property
+    def size(self):
+        u"""The number of the :class:`Dataset` objects within :class:`Databook`."""
+        return len(self._datasets)
+
+
+def detect(stream):
+    u"""Return (format, stream) of given stream."""
+    for fmt in formats.available:
+        try:
+            if fmt.detect(stream):
+                return (fmt, stream)
+        except AttributeError:
+            pass
+    return (None, stream)
+
+
+def import_set(stream):
+    u"""Return dataset of given stream."""
+    (format, stream) = detect(stream)
+
+    try:
+        data = Dataset()
+        format.import_set(data, stream)
+        return data
+
+    except AttributeError, e:
+        return None
+
+
+class InvalidDatasetType(Exception):
+    u"Only Datasets can be added to a DataBook"
+
+
+class InvalidDimensions(Exception):
+    u"Invalid size"
+    
+class InvalidDatasetIndex(Exception):
+    u"Outside of Dataset size"
+
+class HeadersNeeded(Exception):
+    u"Header parameter must be given when appending a column in this Dataset."
+
+class UnsupportedFormat(NotImplementedError):
+    u"Format is not supported"
diff --git a/tablib/formats/__init__.py b/tablib/formats/__init__.py
index 147df31..305026d 100644
--- a/tablib/formats/__init__.py
+++ b/tablib/formats/__init__.py
@@ -3,11 +3,11 @@
 """ Tablib - formats
 """
 
-import _csv as csv
-import _json as json
-import _xls as xls
-import _yaml as yaml
-import _tsv as tsv
-import _html as html
+from . import _csv as csv
+from . import _json as json
+from . import _xls as xls
+from . import _yaml as yaml
+from . import _tsv as tsv
+from . import _html as html
 
 available = (json, xls, yaml, csv, tsv, html)
diff --git a/tablib/formats/_csv.py b/tablib/formats/_csv.py
index 2c74a1c..4b1dc02 100644
--- a/tablib/formats/_csv.py
+++ b/tablib/formats/_csv.py
@@ -3,7 +3,13 @@
 """ Tablib - CSV Support.
 """
 
-import cStringIO
+import sys
+if sys.version_info[0] > 2:
+    from io import StringIO
+else:
+    from cStringIO import StringIO
+
+
 import csv
 import os
 
@@ -17,7 +23,7 @@ extentions = ('csv',)
 
 def export_set(dataset):
     """Returns CSV representation of Dataset."""
-    stream = cStringIO.StringIO()
+    stream = StringIO()
     _csv = csv.writer(stream)
 
     for row in dataset._package(dicts=False):
@@ -31,7 +37,7 @@ def import_set(dset, in_stream, headers=True):
 
     dset.wipe()
 
-    rows = csv.reader(in_stream.split())
+    rows = csv.reader(in_stream.splitlines())
     for i, row in enumerate(rows):
 
         if (i == 0) and (headers):
diff --git a/tablib/formats/_html.py b/tablib/formats/_html.py
index 13dc055..485536c 100644
--- a/tablib/formats/_html.py
+++ b/tablib/formats/_html.py
@@ -3,9 +3,16 @@
 """ Tablib - HTML export support.
 """
 
-from StringIO import StringIO
+import sys
+
+
+if sys.version_info[0] > 2:
+    from io import StringIO
+    from tablib.packages import markup3 as markup
+else:
+    from cStringIO import StringIO
+    from tablib.packages import markup
 
-from tablib.packages import markup
 import tablib
 
 BOOK_ENDINGS = 'h3'
diff --git a/tablib/formats/_json.py b/tablib/formats/_json.py
index 262c627..8d498df 100644
--- a/tablib/formats/_json.py
+++ b/tablib/formats/_json.py
@@ -3,8 +3,13 @@
 """ Tablib - JSON Support
 """
 
-import tablib.core
-from tablib.packages import anyjson
+import tablib
+
+import sys
+if sys.version_info[:2] > (2, 5):
+    from tablib.packages import anyjson
+else:
+    from tablib.packages import anyjson25 as anyjson
 
 
 
@@ -34,7 +39,7 @@ def import_book(dbook, in_stream):
 
     dbook.wipe()
     for sheet in anyjson.deserialize(in_stream):
-        data = tablib.core.Dataset()
+        data = tablib.Dataset()
         data.title = sheet['title']
         data.dict = sheet['data']
         dbook.add_sheet(data)
diff --git a/tablib/formats/_tsv.py b/tablib/formats/_tsv.py
index 76a5f07..acf28da 100644
--- a/tablib/formats/_tsv.py
+++ b/tablib/formats/_tsv.py
@@ -3,7 +3,12 @@
 """ Tablib - TSV (Tab Separated Values) Support.
 """
 
-import cStringIO
+import sys
+if sys.version_info[0] > 2:
+    from io import StringIO
+else:
+    from cStringIO import StringIO
+    
 import csv
 import os
 
@@ -17,7 +22,7 @@ extentions = ('tsv',)
 
 def export_set(dataset):
     """Returns a TSV representation of Dataset."""
-    stream = cStringIO.StringIO()
+    stream = StringIO()
     _tsv = csv.writer(stream, delimiter='\t')
 
     for row in dataset._package(dicts=False):
diff --git a/tablib/formats/_xls.py b/tablib/formats/_xls.py
index 717a6d5..d820250 100644
--- a/tablib/formats/_xls.py
+++ b/tablib/formats/_xls.py
@@ -3,14 +3,19 @@
 """ Tablib - XLS Support.
 """
 
-import cStringIO
+import sys
 
-try:
-    import xlwt
-except ImportError:
+
+if sys.version_info[0] > 2:
+    from io import BytesIO
+    import tablib.packages.xlwt3 as xlwt
+    
+else:
+    from cStringIO import StringIO as BytesIO
     import tablib.packages.xlwt as xlwt
 
 
+
 title = 'xls'
 extentions = ('xls',)
 
@@ -23,11 +28,11 @@ def export_set(dataset):
     """Returns XLS representation of Dataset."""
 
     wb = xlwt.Workbook(encoding='utf8')
-    ws = wb.add_sheet(dataset.title if dataset.title else 'Tabbed Dataset')
+    ws = wb.add_sheet(dataset.title if dataset.title else 'Tablib Dataset')
 
     dset_sheet(dataset, ws)
 
-    stream = cStringIO.StringIO()
+    stream = BytesIO()
     wb.save(stream)
     return stream.getvalue()
 
@@ -43,7 +48,7 @@ def export_book(databook):
         dset_sheet(dset, ws)
 
 
-    stream = cStringIO.StringIO()
+    stream = BytesIO()
     wb.save(stream)
     return stream.getvalue()
 
diff --git a/tablib/formats/_yaml.py b/tablib/formats/_yaml.py
index 3f2f8b7..66800a7 100644
--- a/tablib/formats/_yaml.py
+++ b/tablib/formats/_yaml.py
@@ -3,10 +3,16 @@
 """ Tablib - YAML Support.
 """
 
+import sys
+
 try:
     import yaml
 except ImportError:
-    import tablib.packages.yaml as yaml
+    if sys.version_info[0] > 2:
+        import tablib.packages.yaml3 as yaml
+    else:
+        import tablib.packages.yaml as yaml
+    
 
 import tablib
 
@@ -40,7 +46,7 @@ def import_book(dbook, in_stream):
     dbook.wipe()
 
     for sheet in yaml.load(in_stream):
-        data = tablib.core.Dataset()
+        data = tablib.Dataset()
         data.title = sheet['title']
         data.dict = sheet['data']
         dbook.add_sheet(data)
diff --git a/tablib/helpers.py b/tablib/helpers.py
deleted file mode 100644
index 718d159..0000000
--- a/tablib/helpers.py
+++ /dev/null
@@ -1,37 +0,0 @@
-# -*- coding: utf-8 -*-
-
-""" Tablib - General Helpers.
-"""
-
-import sys
-
-
-class Struct(object):
-    """Your attributes are belong to us."""
-    
-    def __init__(self, **entries): 
-        self.__dict__.update(entries)
-        
-    def __getitem__(self, key):
-        return getattr(self, key, None)
-
-    def dictionary(self):
-        """Returns dictionary representation of object."""
-        return self.__dict__
-
-    def items(self):
-        """Returns items within object."""
-        return self.__dict__.items()
-
-    def keys(self):
-        """Returns keys within object."""
-        return self.__dict__.keys()
-
-
-
-def piped():
-    """Returns piped input via stdin, else False."""
-    with sys.stdin as stdin:
-        # TTY is only way to detect if stdin contains data
-        return stdin.read() if not stdin.isatty() else None
-
diff --git a/tablib/packages/anyjson.py b/tablib/packages/anyjson.py
index 6603751..a7d1a5f 100644
--- a/tablib/packages/anyjson.py
+++ b/tablib/packages/anyjson.py
@@ -53,7 +53,7 @@ class _JsonImplementation(object):
     """Incapsulates a JSON implementation"""
 
     def __init__(self, modspec):
-        modinfo = dict(zip(_fields, modspec))
+        modinfo = dict(list(zip(_fields, modspec)))
 
         # No try block. We want importerror to end up at caller
         module = self._attempt_load(modinfo["modname"])
@@ -64,9 +64,9 @@ class _JsonImplementation(object):
         self._encode_error = modinfo["encerror"]
         self._decode_error = modinfo["decerror"]
 
-        if isinstance(modinfo["encerror"], basestring):
+        if isinstance(modinfo["encerror"], str):
             self._encode_error = getattr(module, modinfo["encerror"])
-        if isinstance(modinfo["decerror"], basestring):
+        if isinstance(modinfo["decerror"], str):
             self._decode_error = getattr(module, modinfo["decerror"])
 
         self.name = modinfo["modname"]
@@ -82,7 +82,7 @@ class _JsonImplementation(object):
         TypeError if the object could not be serialized."""
         try:
             return self._encode(data)
-        except self._encode_error, exc:
+        except self._encode_error as exc:
             raise TypeError(*exc.args)
 
     def deserialize(self, s):
@@ -90,7 +90,7 @@ class _JsonImplementation(object):
         ValueError if the string vould not be parsed."""
         try:
             return self._decode(s)
-        except self._decode_error, exc:
+        except self._decode_error as exc:
             raise ValueError(*exc.args)
 
 
diff --git a/tablib/packages/anyjson25.py b/tablib/packages/anyjson25.py
new file mode 100644
index 0000000..ad6fc40
--- /dev/null
+++ b/tablib/packages/anyjson25.py
@@ -0,0 +1,118 @@
+u"""
+Wraps the best available JSON implementation available in a common interface
+"""
+
+__version__ = u"0.2.0"
+__author__ = u"Rune Halvorsen <runefh@gmail.com>"
+__homepage__ = u"http://bitbucket.org/runeh/anyjson/"
+__docformat__ = u"restructuredtext"
+
+u"""
+
+.. function:: serialize(obj)
+
+    Serialize the object to JSON.
+
+.. function:: deserialize(str)
+
+    Deserialize JSON-encoded object to a Python object.
+
+.. function:: force_implementation(name)
+
+    Load a specific json module. This is useful for testing and not much else
+
+.. attribute:: implementation
+
+    The json implementation object. This is probably not useful to you,
+    except to get the name of the implementation in use. The name is
+    available through `implementation.name`.
+"""
+
+import sys
+from itertools import izip
+
+implementation = None
+
+u"""
+.. data:: _modules
+
+    List of known json modules, and the names of their serialize/unserialize
+    methods, as well as the exception they throw. Exception can be either
+    an exception class or a string.
+"""
+_modules = [(u"cjson", u"encode", u"EncodeError", u"decode", u"DecodeError"),
+            (u"jsonlib2", u"write", u"WriteError", u"read", u"ReadError"),
+            (u"jsonlib", u"write", u"WriteError", u"read", u"ReadError"),
+            (u"simplejson", u"dumps", TypeError, u"loads", ValueError),
+            (u"json", u"dumps", TypeError, u"loads", ValueError),
+            (u"django.utils.simplejson", u"dumps", TypeError, u"loads",
+             ValueError)]
+_fields = (u"modname", u"encoder", u"encerror", u"decoder", u"decerror")
+
+
+class _JsonImplementation(object):
+    u"""Incapsulates a JSON implementation"""
+
+    def __init__(self, modspec):
+        modinfo = dict(list(izip(_fields, modspec)))
+
+        # No try block. We want importerror to end up at caller
+        module = self._attempt_load(modinfo[u"modname"])
+
+        self.implementation = modinfo[u"modname"]
+        self._encode = getattr(module, modinfo[u"encoder"])
+        self._decode = getattr(module, modinfo[u"decoder"])
+        self._encode_error = modinfo[u"encerror"]
+        self._decode_error = modinfo[u"decerror"]
+
+        if isinstance(modinfo[u"encerror"], unicode):
+            self._encode_error = getattr(module, modinfo[u"encerror"])
+        if isinstance(modinfo[u"decerror"], unicode):
+            self._decode_error = getattr(module, modinfo[u"decerror"])
+
+        self.name = modinfo[u"modname"]
+
+    def _attempt_load(self, modname):
+        u"""Attempt to load module name modname, returning it on success,
+        throwing ImportError if module couldn't be imported"""
+        __import__(modname)
+        return sys.modules[modname]
+
+    def serialize(self, data):
+        u"""Serialize the datastructure to json. Returns a string. Raises
+        TypeError if the object could not be serialized."""
+        try:
+            return self._encode(data)
+        except self._encode_error, exc:
+            raise TypeError(*exc.args)
+
+    def deserialize(self, s):
+        u"""deserialize the string to python data types. Raises
+        ValueError if the string vould not be parsed."""
+        try:
+            return self._decode(s)
+        except self._decode_error, exc:
+            raise ValueError(*exc.args)
+
+
+def force_implementation(modname):
+    u"""Forces anyjson to use a specific json module if it's available"""
+    global implementation
+    for name, spec in [(e[0], e) for e in _modules]:
+        if name == modname:
+            implementation = _JsonImplementation(spec)
+            return
+    raise ImportError(u"No module named: %s" % modname)
+
+
+for modspec in _modules:
+    try:
+        implementation = _JsonImplementation(modspec)
+        break
+    except ImportError:
+        pass
+else:
+    raise ImportError(u"No supported JSON module found")
+
+serialize = lambda value: implementation.serialize(value)
+deserialize = lambda value: implementation.deserialize(value)
diff --git a/tablib/packages/markup3.py b/tablib/packages/markup3.py
new file mode 100644
index 0000000..1973c00
--- /dev/null
+++ b/tablib/packages/markup3.py
@@ -0,0 +1,484 @@
+# This code is in the public domain, it comes
+# with absolutely no warranty and you can do
+# absolutely whatever you want with it.
+
+__date__ = '17 May 2007'
+__version__ = '1.7'
+__doc__= """
+This is markup.py - a Python module that attempts to
+make it easier to generate HTML/XML from a Python program
+in an intuitive, lightweight, customizable and pythonic way.
+
+The code is in the public domain.
+
+Version: %s as of %s.
+
+Documentation and further info is at http://markup.sourceforge.net/
+
+Please send bug reports, feature requests, enhancement
+ideas or questions to nogradi at gmail dot com.
+
+Installation: drop markup.py somewhere into your Python path.
+""" % ( __version__, __date__ )
+
+import string
+
+class element:
+    """This class handles the addition of a new element."""
+
+    def __init__( self, tag, case='lower', parent=None ):
+        self.parent = parent
+
+        if case == 'lower':
+            self.tag = tag.lower( )
+        else:
+            self.tag = tag.upper( )
+    
+    def __call__( self, *args, **kwargs ):
+        if len( args ) > 1:
+            raise ArgumentError( self.tag )
+
+        # if class_ was defined in parent it should be added to every element
+        if self.parent is not None and self.parent.class_ is not None:
+            if 'class_' not in kwargs:
+                kwargs['class_'] = self.parent.class_
+            
+        if self.parent is None and len( args ) == 1:
+            x = [ self.render( self.tag, False, myarg, mydict ) for myarg, mydict in _argsdicts( args, kwargs ) ]
+            return '\n'.join( x )
+        elif self.parent is None and len( args ) == 0:
+            x = [ self.render( self.tag, True, myarg, mydict ) for myarg, mydict in _argsdicts( args, kwargs ) ]
+            return '\n'.join( x )
+            
+        if self.tag in self.parent.twotags:
+            for myarg, mydict in _argsdicts( args, kwargs ):
+                self.render( self.tag, False, myarg, mydict )
+        elif self.tag in self.parent.onetags:
+            if len( args ) == 0:
+                for myarg, mydict in _argsdicts( args, kwargs ):
+                    self.render( self.tag, True, myarg, mydict )    # here myarg is always None, because len( args ) = 0
+            else:
+                raise ClosingError( self.tag )
+        elif self.parent.mode == 'strict_html' and self.tag in self.parent.deptags:
+            raise DeprecationError( self.tag )
+        else:
+            raise InvalidElementError( self.tag, self.parent.mode )
+    
+    def render( self, tag, single, between, kwargs ):
+        """Append the actual tags to content."""
+
+        out = "<%s" % tag
+        for key, value in kwargs.items( ):
+            if value is not None:               # when value is None that means stuff like <... checked>
+                key = key.strip('_')            # strip this so class_ will mean class, etc.
+                if key == 'http_equiv':         # special cases, maybe change _ to - overall?
+                    key = 'http-equiv'
+                elif key == 'accept_charset':
+                    key = 'accept-charset'
+                out = "%s %s=\"%s\"" % ( out, key, escape( value ) )
+            else:
+                out = "%s %s" % ( out, key )
+        if between is not None:
+            out = "%s>%s</%s>" % ( out, between, tag )
+        else:
+            if single:
+                out = "%s />" % out
+            else:
+                out = "%s>" % out
+        if self.parent is not None:
+            self.parent.content.append( out )
+        else:
+            return out
+    
+    def close( self ):
+        """Append a closing tag unless element has only opening tag."""
+
+        if self.tag in self.parent.twotags:
+            self.parent.content.append( "</%s>" % self.tag )
+        elif self.tag in self.parent.onetags:
+            raise ClosingError( self.tag )
+        elif self.parent.mode == 'strict_html' and self.tag in self.parent.deptags:
+            raise DeprecationError( self.tag )
+
+    def open( self, **kwargs ):
+        """Append an opening tag."""
+
+        if self.tag in self.parent.twotags or self.tag in self.parent.onetags:
+            self.render( self.tag, False, None, kwargs )
+        elif self.mode == 'strict_html' and self.tag in self.parent.deptags:
+            raise DeprecationError( self.tag )
+
+class page:
+    """This is our main class representing a document. Elements are added
+    as attributes of an instance of this class."""
+
+    def __init__( self, mode='strict_html', case='lower', onetags=None, twotags=None, separator='\n', class_=None ):
+        """Stuff that effects the whole document.
+
+        mode -- 'strict_html'   for HTML 4.01 (default)
+                'html'          alias for 'strict_html'
+                'loose_html'    to allow some deprecated elements
+                'xml'           to allow arbitrary elements
+
+        case -- 'lower'         element names will be printed in lower case (default)
+                'upper'         they will be printed in upper case
+
+        onetags --              list or tuple of valid elements with opening tags only
+        twotags --              list or tuple of valid elements with both opening and closing tags
+                                these two keyword arguments may be used to select
+                                the set of valid elements in 'xml' mode
+                                invalid elements will raise appropriate exceptions
+        
+        separator --            string to place between added elements, defaults to newline
+        
+        class_ --               a class that will be added to every element if defined"""
+        
+        valid_onetags = [ "AREA", "BASE", "BR", "COL", "FRAME", "HR", "IMG", "INPUT", "LINK", "META", "PARAM" ]
+        valid_twotags = [ "A", "ABBR", "ACRONYM", "ADDRESS", "B", "BDO", "BIG", "BLOCKQUOTE", "BODY", "BUTTON",
+                "CAPTION", "CITE", "CODE", "COLGROUP", "DD", "DEL", "DFN", "DIV", "DL", "DT", "EM", "FIELDSET",
+                "FORM", "FRAMESET", "H1", "H2", "H3", "H4", "H5", "H6", "HEAD", "HTML", "I", "IFRAME", "INS",
+                "KBD", "LABEL", "LEGEND", "LI", "MAP", "NOFRAMES", "NOSCRIPT", "OBJECT", "OL", "OPTGROUP",
+                "OPTION", "P", "PRE", "Q", "SAMP", "SCRIPT", "SELECT", "SMALL", "SPAN", "STRONG", "STYLE",
+                "SUB", "SUP", "TABLE", "TBODY", "TD", "TEXTAREA", "TFOOT", "TH", "THEAD", "TITLE", "TR",
+                "TT", "UL", "VAR" ]
+        deprecated_onetags = [ "BASEFONT", "ISINDEX" ]
+        deprecated_twotags = [ "APPLET", "CENTER", "DIR", "FONT", "MENU", "S", "STRIKE", "U" ]
+
+        self.header = [ ]
+        self.content = [ ]
+        self.footer = [ ]
+        self.case = case
+        self.separator = separator
+
+        # init( ) sets it to True so we know that </body></html> has to be printed at the end
+        self._full = False
+        self.class_= class_
+
+        if mode == 'strict_html' or mode == 'html':
+            self.onetags = valid_onetags
+            self.onetags += list(map( str.lower, self.onetags ))
+            self.twotags = valid_twotags
+            self.twotags += list(map( str.lower, self.twotags ))
+            self.deptags = deprecated_onetags + deprecated_twotags
+            self.deptags += list(map( str.lower, self.deptags ))
+            self.mode = 'strict_html'
+        elif mode == 'loose_html':
+            self.onetags = valid_onetags + deprecated_onetags 
+            self.onetags += list(map( str.lower, self.onetags ))
+            self.twotags = valid_twotags + deprecated_twotags
+            self.twotags += list(map( str.lower, self.twotags ))
+            self.mode = mode
+        elif mode == 'xml':
+            if onetags and twotags:
+                self.onetags = onetags
+                self.twotags = twotags
+            elif ( onetags and not twotags ) or ( twotags and not onetags ):
+                raise CustomizationError( )
+            else:
+                self.onetags = russell( )
+                self.twotags = russell( )
+            self.mode = mode
+        else:
+            raise ModeError( mode )
+
+    def __getattr__( self, attr ):
+        if attr.startswith("__") and attr.endswith("__"):
+            raise AttributeError(attr)
+        return element( attr, case=self.case, parent=self )
+
+    def __str__( self ):
+        
+        if self._full and ( self.mode == 'strict_html' or self.mode == 'loose_html' ):
+            end = [ '</body>', '</html>' ]
+        else:
+            end = [ ]
+        
+        return self.separator.join( self.header + self.content + self.footer + end )
+
+    def __call__( self, escape=False ):
+        """Return the document as a string.
+
+        escape --   False   print normally
+                    True    replace < and > by &lt; and &gt;
+                            the default escape sequences in most browsers"""
+
+        if escape:
+            return _escape( self.__str__( ) )
+        else:
+            return self.__str__( )
+
+    def add( self, text ):
+        """This is an alias to addcontent."""
+        self.addcontent( text )
+
+    def addfooter( self, text ):
+        """Add some text to the bottom of the document"""
+        self.footer.append( text )
+
+    def addheader( self, text ):
+        """Add some text to the top of the document"""
+        self.header.append( text )
+
+    def addcontent( self, text ):
+        """Add some text to the main part of the document"""
+        self.content.append( text )
+
+
+    def init( self, lang='en', css=None, metainfo=None, title=None, header=None,
+              footer=None, charset=None, encoding=None, doctype=None, bodyattrs=None, script=None ):
+        """This method is used for complete documents with appropriate
+        doctype, encoding, title, etc information. For an HTML/XML snippet
+        omit this method.
+
+        lang --     language, usually a two character string, will appear
+                    as <html lang='en'> in html mode (ignored in xml mode)
+        
+        css --      Cascading Style Sheet filename as a string or a list of
+                    strings for multiple css files (ignored in xml mode)
+
+        metainfo -- a dictionary in the form { 'name':'content' } to be inserted
+                    into meta element(s) as <meta name='name' content='content'>
+                    (ignored in xml mode)
+
+        bodyattrs --a dictionary in the form { 'key':'value', ... } which will be added
+                    as attributes of the <body> element as <body key='value' ... >
+                    (ignored in xml mode)
+
+        script --   dictionary containing src:type pairs, <script type='text/type' src=src></script>
+
+        title --    the title of the document as a string to be inserted into
+                    a title element as <title>my title</title> (ignored in xml mode)
+
+        header --   some text to be inserted right after the <body> element
+                    (ignored in xml mode)
+
+        footer --   some text to be inserted right before the </body> element
+                    (ignored in xml mode)
+
+        charset --  a string defining the character set, will be inserted into a
+                    <meta http-equiv='Content-Type' content='text/html; charset=myset'>
+                    element (ignored in xml mode)
+
+        encoding -- a string defining the encoding, will be put into to first line of
+                    the document as <?xml version='1.0' encoding='myencoding' ?> in
+                    xml mode (ignored in html mode)
+
+        doctype --  the document type string, defaults to
+                    <!DOCTYPE HTML PUBLIC '-//W3C//DTD HTML 4.01 Transitional//EN'>
+                    in html mode (ignored in xml mode)"""
+
+        self._full = True
+
+        if self.mode == 'strict_html' or self.mode == 'loose_html':
+            if doctype is None:
+                doctype = "<!DOCTYPE HTML PUBLIC '-//W3C//DTD HTML 4.01 Transitional//EN'>"
+            self.header.append( doctype )
+            self.html( lang=lang )
+            self.head( )
+            if charset is not None:
+                self.meta( http_equiv='Content-Type', content="text/html; charset=%s" % charset )
+            if metainfo is not None:
+                self.metainfo( metainfo )
+            if css is not None:
+                self.css( css )
+            if title is not None:
+                self.title( title )
+            if script is not None:
+                self.scripts( script )
+            self.head.close()
+            if bodyattrs is not None:
+                self.body( **bodyattrs )
+            else:
+                self.body( )
+            if header is not None:
+                self.content.append( header )
+            if footer is not None:
+                self.footer.append( footer )
+
+        elif self.mode == 'xml':
+            if doctype is None:
+                if encoding is not None:
+                    doctype = "<?xml version='1.0' encoding='%s' ?>" % encoding
+                else:
+                    doctype = "<?xml version='1.0' ?>"
+            self.header.append( doctype )
+
+    def css( self, filelist ):
+        """This convenience function is only useful for html.
+        It adds css stylesheet(s) to the document via the <link> element."""
+      
+        if isinstance( filelist, str ):
+            self.link( href=filelist, rel='stylesheet', type='text/css', media='all' )
+        else:
+            for file in filelist:
+                self.link( href=file, rel='stylesheet', type='text/css', media='all' )
+
+    def metainfo( self, mydict ):
+        """This convenience function is only useful for html.
+        It adds meta information via the <meta> element, the argument is
+        a dictionary of the form { 'name':'content' }."""
+
+        if isinstance( mydict, dict ):
+            for name, content in mydict.items( ):
+                self.meta( name=name, content=content )
+        else:
+            raise TypeError("Metainfo should be called with a dictionary argument of name:content pairs.")
+
+    def scripts( self, mydict ):
+        """Only useful in html, mydict is dictionary of src:type pairs will
+        be rendered as <script type='text/type' src=src></script>"""
+
+        if isinstance( mydict, dict ):
+            for src, type in mydict.items( ):
+                self.script( '', src=src, type='text/%s' % type )
+        else:
+            raise TypeError("Script should be given a dictionary of src:type pairs.")
+
+
+class _oneliner:
+    """An instance of oneliner returns a string corresponding to one element.
+    This class can be used to write 'oneliners' that return a string
+    immediately so there is no need to instantiate the page class."""
+    
+    def __init__( self, case='lower' ):
+        self.case = case
+    
+    def __getattr__( self, attr ):
+        if attr.startswith("__") and attr.endswith("__"):
+            raise AttributeError(attr)
+        return element( attr, case=self.case, parent=None )
+
+oneliner = _oneliner( case='lower' )
+upper_oneliner = _oneliner( case='upper' )
+
+def _argsdicts( args, mydict ):
+    """A utility generator that pads argument list and dictionary values, will only be called with len( args ) = 0, 1."""
+    
+    if len( args ) == 0:
+        args = None, 
+    elif len( args ) == 1:
+        args = _totuple( args[0] )
+    else:
+        raise Exception("We should have never gotten here.")
+
+    mykeys = list(mydict.keys( ))
+    myvalues = list(map( _totuple, list(mydict.values( )) ))
+
+    maxlength = max( list(map( len, [ args ] + myvalues )) )
+
+    for i in range( maxlength ):
+        thisdict = { }
+        for key, value in zip( mykeys, myvalues ):
+            try:
+                thisdict[ key ] = value[i]
+            except IndexError:
+                thisdict[ key ] = value[-1]
+        try:
+            thisarg = args[i]
+        except IndexError:
+            thisarg = args[-1]
+
+        yield thisarg, thisdict
+
+def _totuple( x ):
+    """Utility stuff to convert string, int, float, None or anything to a usable tuple."""
+
+    if isinstance( x, str ):
+        out = x,
+    elif isinstance( x, ( int, float ) ):
+        out = str( x ),
+    elif x is None:
+        out = None,
+    else:
+        out = tuple( x )
+
+    return out
+
+def escape( text, newline=False ):
+    """Escape special html characters."""
+
+    if isinstance( text, str ):
+        if '&' in text:
+            text = text.replace( '&', '&amp;' )
+        if '>' in text:
+            text = text.replace( '>', '&gt;' )
+        if '<' in text:
+            text = text.replace( '<', '&lt;' )
+        if '\"' in text:
+            text = text.replace( '\"', '&quot;' )
+        if '\'' in text:
+            text = text.replace( '\'', '&quot;' )
+        if newline:
+            if '\n' in text:
+                text = text.replace( '\n', '<br>' )
+
+    return text
+
+_escape = escape
+
+def unescape( text ):
+    """Inverse of escape."""
+    
+    if isinstance( text, str ):
+        if '&amp;' in text:
+            text = text.replace( '&amp;', '&' )
+        if '&gt;' in text:
+            text = text.replace( '&gt;', '>' )
+        if '&lt;' in text:
+            text = text.replace( '&lt;', '<' )
+        if '&quot;' in text:
+            text = text.replace( '&quot;', '\"' )
+
+    return text
+
+class dummy:
+    """A dummy class for attaching attributes."""
+    pass
+
+doctype = dummy( )
+doctype.frameset = "<!DOCTYPE HTML PUBLIC '-//W3C//DTD HTML 4.01 Frameset//EN' 'http://www.w3.org/TR/html4/frameset.dtd'>"
+doctype.strict = "<!DOCTYPE HTML PUBLIC '-//W3C//DTD HTML 4.01//EN' 'http://www.w3.org/TR/html4/strict.dtd'>"
+doctype.loose = "<!DOCTYPE HTML PUBLIC '-//W3C//DTD HTML 4.01 Transitional//EN' 'http://www.w3.org/TR/html4/loose.dtd'>"
+
+class russell:
+    """A dummy class that contains anything."""
+
+    def __contains__( self, item ):
+        return True
+
+
+class MarkupError( Exception ):
+    """All our exceptions subclass this."""
+    def __str__( self ):
+        return self.message
+
+class ClosingError( MarkupError ):
+    def __init__( self, tag ):
+        self.message = "The element '%s' does not accept non-keyword arguments (has no closing tag)." % tag
+
+class OpeningError( MarkupError ):
+    def __init__( self, tag ):
+        self.message = "The element '%s' can not be opened." % tag
+
+class ArgumentError( MarkupError ):
+    def __init__( self, tag ):
+        self.message = "The element '%s' was called with more than one non-keyword argument." % tag
+
+class InvalidElementError( MarkupError ):
+    def __init__( self, tag, mode ):
+        self.message = "The element '%s' is not valid for your mode '%s'." % ( tag, mode )
+
+class DeprecationError( MarkupError ):
+    def __init__( self, tag ):
+        self.message = "The element '%s' is deprecated, instantiate markup.page with mode='loose_html' to allow it." % tag
+
+class ModeError( MarkupError ):
+    def __init__( self, mode ):
+        self.message = "Mode '%s' is invalid, possible values: strict_html, loose_html, xml." % mode
+
+class CustomizationError( MarkupError ):
+    def __init__( self ):
+        self.message = "If you customize the allowed elements, you must define both types 'onetags' and 'twotags'."
+
+if __name__ == '__main__':
+    print(__doc__)
diff --git a/tablib/packages/ordereddict.py b/tablib/packages/ordereddict.py
index 5b0303f..a5b896d 100644
--- a/tablib/packages/ordereddict.py
+++ b/tablib/packages/ordereddict.py
@@ -1,127 +1,127 @@
-# Copyright (c) 2009 Raymond Hettinger

-#

-# 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.

-

-from UserDict import DictMixin

-

-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')

-        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):

-            if len(self) != len(other):

-                return False

-            for p, q in  zip(self.items(), other.items()):

-                if p != q:

-                    return False

-            return True

-        return dict.__eq__(self, other)

-

-    def __ne__(self, other):

-        return not self == other

+# Copyright (c) 2009 Raymond Hettinger
+#
+# 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.
+
+from UserDict import DictMixin
+
+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')
+        if last:
+            key = next(reversed(self))
+        else:
+            key = next(iter(self))
+        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__, list(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):
+            if len(self) != len(other):
+                return False
+            for p, q in  zip(list(self.items()), list(other.items())):
+                if p != q:
+                    return False
+            return True
+        return dict.__eq__(self, other)
+
+    def __ne__(self, other):
+        return not self == other
diff --git a/tablib/packages/xlwt/__init__.py b/tablib/packages/xlwt/__init__.py
index dcc23f0..cb65687 100644
--- a/tablib/packages/xlwt/__init__.py
+++ b/tablib/packages/xlwt/__init__.py
@@ -3,9 +3,6 @@
 __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
diff --git a/tablib/packages/xlwt3/BIFFRecords.py b/tablib/packages/xlwt3/BIFFRecords.py
new file mode 100644
index 0000000..39a9554
--- /dev/null
+++ b/tablib/packages/xlwt3/BIFFRecords.py
@@ -0,0 +1,2392 @@
+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, str):
+            s = str(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 = b''
+        self._continues = [None, None]
+        self._current_piece = pack('<II', 0, 0)
+        data = [(idx, s) for s, idx in list(self._str_indexes.items())]
+        data.sort() # in index order
+        for idx, s in data:
+            if self._tally[idx] == 0:
+                s = b''
+            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 = b''.join(self._continues)
+        self._continues = None
+        return result
+
+
+    def _add_to_sst(self, s):
+        u_str = upack2(s, self.encoding)
+        # (to_py3): added b'...'
+        is_unicode_str = u_str[2] == b'\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 == b'':
+            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 = b''
+
+    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 += b'\x01' # (to_py3): added b'...'
+                else:
+                    self._current_piece += b'\x00' # (to_py3): added b'...'
+
+            i += atom_len
+
+
+class BiffRecord(object):
+
+    _rec_data = b'' # 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 = 0x00
+        ver_can_read    = 0x06
+
+        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 = b''
+
+
+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(bytes('%ds%ds' % (uowner_len, 0x70 - uowner_len), encoding='utf8'), bytes(uowner, encoding='utf8'), b' '*(0x70 - uowner_len)) # (to_py3): added b'...'
+        # self._rec_data = (b'%ds%ds' % (uowner_len, 0x70 - uowner_len), uowner, b' '*(0x70 - uowner_len)) # (to_py3): added b'...'
+
+
+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 == b"":
+            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 = b""):
+        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 = b''
+
+
+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,
+                                    0x00)
+        if scl_magn:
+            self._scl_rec = pack('<4H', 0x00A0, 4, scl_magn, 100)
+        else:
+            self._scl_rec = b''
+
+    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', int(px), int(py), int(first_row_bottom),
+                              int(first_col_right), int(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 = b''
+            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=b'', desc_text=b'', help_text=b'', status_text=b''):
+        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 range(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 b''.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.encode()
+
diff --git a/tablib/packages/xlwt3/Bitmap.py b/tablib/packages/xlwt3/Bitmap.py
new file mode 100644
index 0000000..5da082b
--- /dev/null
+++ b/tablib/packages/xlwt3/Bitmap.py
@@ -0,0 +1,258 @@
+#  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 = open(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] != b"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/xlwt3/Cell.py b/tablib/packages/xlwt3/Cell.py
new file mode 100644
index 0000000..08a9e42
--- /dev/null
+++ b/tablib/packages/xlwt3/Cell.py
@@ -0,0 +1,233 @@
+from struct import unpack, pack

+from . 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 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 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

+                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:

+                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):

+                return 1, w23

+

+            packed100 = pack('<d', temp)

+            w01, w23 = unpack('<2i', packed100)

+            if not w01 and not(w23 & 3):

+                return 1, w23 | 1

+

+        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 = b'' # (to_py3): 'b' binary data

+        for j in range(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))

+                # (to_py3): 'b' binary data

+                pieces.append(b''.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))

+                # (to_py3): 'b' binary data

+                pieces.append(b''.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 b''.join(pieces) # (to_py3): 'b' binary data

diff --git a/tablib/packages/xlwt3/Column.py b/tablib/packages/xlwt3/Column.py
new file mode 100644
index 0000000..4c75a2c
--- /dev/null
+++ b/tablib/packages/xlwt3/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/xlwt3/CompoundDoc.py b/tablib/packages/xlwt3/CompoundDoc.py
new file mode 100644
index 0000000..d53726f
--- /dev/null
+++ b/tablib/packages/xlwt3/CompoundDoc.py
@@ -0,0 +1,516 @@
+import sys

+import struct

+

+ENCODING = 'utf-16-le'

+

+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 = b''

+            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 != b'':

+                # 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 != b'\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 = b''.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 = b''

+            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 = b''

+        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 = b''

+

+        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 = b'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_sect = []

+

+        self.dir_stream = b''

+        self.dir_stream_sect = []

+

+        self.packed_SAT = b''

+        self.SAT_sect = []

+

+        self.packed_MSAT_1st = b''

+        self.packed_MSAT_2nd = b''

+        self.MSAT_sect_2nd = []

+

+        self.header = b''

+

+    def __build_directory(self): # align on sector boundary

+        self.dir_stream = b''

+

+        #(to_py3): replaced = b'\x00'.join(b'Root Entry\x00') + b'\x00'

+        dentry_name      = 'Root Entry\x00'.encode(ENCODING)

+        dentry_name_sz   = len(dentry_name)

+        dentry_name_pad  = b'\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

+        )

+        # (to_py3): replaced = b'\x00'.join(b'Workbook\x00') + b'\x00'

+        dentry_name      = 'Workbook\x00'.encode(ENCODING)

+        dentry_name_sz   = len(dentry_name)

+        dentry_name_pad  = b'\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      = b''

+        dentry_name_sz   = len(dentry_name)

+        dentry_name_pad  = b'\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(list(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             = b'\xD0\xCF\x11\xE0\xA1\xB1\x1A\xE1'

+        file_uid              = b'\x00'*16

+        rev_num               = b'\x3E\x00'

+        ver_num               = b'\x03\x00'

+        byte_order            = b'\xFE\xFF'

+        log_sect_size         = struct.pack('<H', 9)

+        log_short_sect_size   = struct.pack('<H', 6)

+        not_used0             = b'\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             = b'\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 =       b''.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 = b'\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/xlwt3/ExcelFormula.py b/tablib/packages/xlwt3/ExcelFormula.py
new file mode 100644
index 0000000..c72cb86
--- /dev/null
+++ b/tablib/packages/xlwt3/ExcelFormula.py
@@ -0,0 +1,41 @@
+from . 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 as 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/xlwt3/ExcelFormulaLexer.py b/tablib/packages/xlwt3/ExcelFormulaLexer.py
new file mode 100644
index 0000000..5dc546c
--- /dev/null
+++ b/tablib/packages/xlwt3/ExcelFormulaLexer.py
@@ -0,0 +1,126 @@
+import sys

+from .antlr import EOF, CommonToken as Tok, TokenStream, TokenStreamException

+import struct

+from . 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 as e:

+        print("error:", e)

diff --git a/tablib/packages/xlwt3/ExcelFormulaParser.py b/tablib/packages/xlwt3/ExcelFormulaParser.py
new file mode 100644
index 0000000..5e73934
--- /dev/null
+++ b/tablib/packages/xlwt3/ExcelFormulaParser.py
@@ -0,0 +1,659 @@
+### $ANTLR 2.7.7 (20060930): "xlwt/excel-formula.g" -> "ExcelFormulaParser.py"$

+### import antlr and other modules ..

+import sys

+from . import antlr

+

+### header action >>>

+import struct

+from . 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 = b""

+        self.sheet_references = []

+        self.xcall_references = []

+        ### __init__ header action <<<

+

+    def formula(self):

+        self.expr("V")

+

+    def expr(self, arg_type):

+        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 = b"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 range(nc-1, 0, -1):

+                skiplens[ic-1] = skiplens[ic] + chunklens[ic] + 4

+            jump_pos = [2 * nc + 2]

+            for ic in range(nc):

+                jump_pos.append(jump_pos[-1] + chunklens[ic] + 4)

+            chunk_shift = 2 * nc + 6 # size of tAttrChoose

+            for ic in range(nc):

+                for refx in range(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 range(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 += b"".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 = b""

+                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))):

+                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):

+                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]:

+            sheet_ref_name = self.LT(1)

+            self.match(NAME)

+            ref = sheet_ref_name.text

+        elif la1 and la1 in [INT_CONST]:

+            sheet_ref_int = self.LT(1)

+            self.match(INT_CONST)

+            ref = sheet_ref_int.text

+        elif la1 and la1 in [QUOTENAME]:

+            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 = [ 37681618946, 0]

+    return data

+_tokenSet_0 = antlr.BitSet(mk_tokenSet_0())

+

diff --git a/tablib/packages/xlwt3/ExcelMagic.py b/tablib/packages/xlwt3/ExcelMagic.py
new file mode 100644
index 0000000..90372b4
--- /dev/null
+++ b/tablib/packages/xlwt3/ExcelMagic.py
@@ -0,0 +1,859 @@
+""" 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: "#NULL!",  # intersection of two cell ranges is empty

+    0x07: "#DIV/0!", # division by zero

+    0x0F: "#VALUE!", # wrong type of operand

+    0x17: "#REF!",   # illegal or deleted cell reference

+    0x1D: "#NAME?",  # wrong function or range name

+    0x24: "#NUM!",   # value range overflow

+    0x2A: "#N/A!"    # argument or function not available

+}

diff --git a/tablib/packages/xlwt3/Formatting.py b/tablib/packages/xlwt3/Formatting.py
new file mode 100644
index 0000000..c92498b
--- /dev/null
+++ b/tablib/packages/xlwt3/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.

+

+'''

+

+from . 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 = b'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/xlwt3/Row.py b/tablib/packages/xlwt3/Row.py
new file mode 100644
index 0000000..46447b8
--- /dev/null
+++ b/tablib/packages/xlwt3/Row.py
@@ -0,0 +1,253 @@
+# -*- coding: windows-1252 -*-

+

+from . import BIFFRecords

+from . import Style

+from .Cell import StrCell, BlankCell, NumberCell, FormulaCell, MulBlankCell, BooleanCell, ErrorCell, \

+    _get_cells_biff_data_mul

+from . 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 range(colx1+1, colx2+1):

+            self.insert_cell(col_index, None)

+

+    def get_cells_biff_data(self):

+        cell_items = [item for item in self.__cells.items() 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, str):

+            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, 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/xlwt3/Style.py b/tablib/packages/xlwt3/Style.py
new file mode 100644
index 0000000..182fc07
--- /dev/null
+++ b/tablib/packages/xlwt3/Style.py
@@ -0,0 +1,593 @@
+# -*- coding: windows-1252 -*-

+

+from . import Formatting

+from .BIFFRecords import *

+import collections

+

+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(list(range(0, 23)), StyleCollection._std_num_fmt_list[0:23]):

+            self._num_formats[fmtstr] = fmtidx

+        for fmtidx, fmtstr in zip(list(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 = b''

+        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 = b''

+        if self.style_compression:

+            alist = list(self._font_x2id.items())

+        else:

+            alist = [(x, o) for o, x in list(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 = b''

+        alist = [

+            (v, k)

+            for k, v in list(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 = b''

+        for i in range(0, 16):

+            result += XFRecord(self._default_xf, 'style').get()

+        if self.style_compression == 2:

+            alist = list(self._xf_x2id.items())

+        else:

+            alist = [(x, o) for o, x in list(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 range(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, str):

+                    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 isinstance(value_rule, collections.Callable):

+                    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/xlwt3/UnicodeUtils.py b/tablib/packages/xlwt3/UnicodeUtils.py
new file mode 100644
index 0000000..204d13c
--- /dev/null
+++ b/tablib/packages/xlwt3/UnicodeUtils.py
@@ -0,0 +1,79 @@
+'''

+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, str):

+        us = s

+    else:

+        us = str(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, str):

+        us = s

+    else:

+        us = str(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/xlwt3/Utils.py b/tablib/packages/xlwt3/Utils.py
new file mode 100644
index 0000000..3509f03
--- /dev/null
+++ b/tablib/packages/xlwt3/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 range(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 == "" or sheet_name[0] == "'" or len(sheet_name) > 31:

+        return False

+    for c in sheet_name:

+        if c in "[]:\\?/*\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 "'" + unquoted_sheet_name.replace("'", "''") + "'"

diff --git a/tablib/packages/xlwt3/Workbook.py b/tablib/packages/xlwt3/Workbook.py
new file mode 100644
index 0000000..ba42e6b
--- /dev/null
+++ b/tablib/packages/xlwt3/Workbook.py
@@ -0,0 +1,635 @@
+'''

+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

+'''

+

+from . import BIFFRecords

+from . 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):

+        from . import Worksheet, Utils

+        if not isinstance(sheetname, str):

+            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(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, str):

+                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 b''

+        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 = b''

+        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(

+                0x00, sheet.visibility, sheet.name, self.encoding

+                ).get())

+

+        start = data_len_before + boundsheets_len + data_len_after

+

+        result = b''

+        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 list(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 list(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 list(self.__sheet_refs.items())]

+            temp.sort()

+            temp = [ref for idx, ref in temp]

+            externsheet_record = BIFFRecords.ExternSheetRecord(temp).get()

+            pieces.append(externsheet_record)

+        return b''.join(pieces)

+

+    def __sst_rec(self):

+        return self.__sst.get_biff_record()

+

+    def __ext_sst_rec(self, abs_stream_pos):

+        return b''

+        #return BIFFRecords.ExtSSTRecord(abs_stream_pos, self.sst_record.str_placement,

+        #self.sst_record.portions_len).get()

+

+    def get_biff_data(self):

+        before = b''

+        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 = b''

+        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):

+        from . import CompoundDoc

+

+        doc = CompoundDoc.XlsDoc()

+        doc.save(filename, self.get_biff_data())

+

+

diff --git a/tablib/packages/xlwt3/Worksheet.py b/tablib/packages/xlwt3/Worksheet.py
new file mode 100644
index 0000000..f358dd6
--- /dev/null
+++ b/tablib/packages/xlwt3/Worksheet.py
@@ -0,0 +1,1296 @@
+'''

+            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

+'''

+

+from . import BIFFRecords

+from . import Bitmap

+from . import Formatting

+from . import Style

+import tempfile

+

+

+class Worksheet(object):

+    from .Workbook import Workbook

+

+    #################################################################

+    ## Constructor

+    #################################################################

+    def __init__(self, sheetname, parent_book, cell_overwrite_ok=False):

+        from . import Row

+        self.Row = Row #(to_py3): Row.Row -> Row

+

+        from . import Column

+        self.Column = Column #(to_py3): 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 = b''

+

+        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 = b''

+

+        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 = str(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 = str(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=b"", 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=b"", 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 = b''

+        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 b""

+

+        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 = int(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.values():

+            result.append(row.get_row_biff_data())

+            result.append(row.get_cells_biff_data())

+        return b''.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 = b''

+        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 = b''

+        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 = b''

+        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 b''.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/xlwt3/__init__.py b/tablib/packages/xlwt3/__init__.py
new file mode 100644
index 0000000..ee8373e
--- /dev/null
+++ b/tablib/packages/xlwt3/__init__.py
@@ -0,0 +1,9 @@
+import sys

+

+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/xlwt3/antlr.py b/tablib/packages/xlwt3/antlr.py
new file mode 100644
index 0000000..b7b5029
--- /dev/null
+++ b/tablib/packages/xlwt3/antlr.py
@@ -0,0 +1,2868 @@
+## 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

+

+###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(str)

+

+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 as 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 as 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:]

+                func(*args)

+            except RecognitionException as 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,[int(0)])

+            return

+        if isinstance(data,int):

+            BitSet.__init__(self,[int(data)])

+            return

+        if isinstance(data,int):

+            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,int):

+                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 range(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 (1 << 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 range(0,d):

+                self.data.append(0)

+            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.__name__))

+

+def runtime_ex(func):

+    raise RuntimeException(

+       "%s is only valid if parser is built for debugging" %

+       (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(fmt % (line,col,text), file=sys.stderr)

+        else:

+            print(fmt,str(x), file=sys.stderr)

+

+    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 range(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("error:",ex, file=sys.stderr)

+

+    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(e, file=sys.stderr)

+

+    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 range(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 range(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/yaml3/__init__.py b/tablib/packages/yaml3/__init__.py
new file mode 100644
index 0000000..f36267a
--- /dev/null
+++ b/tablib/packages/yaml3/__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 io import StringIO
+        else:
+            from io 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/yaml3/composer.py b/tablib/packages/yaml3/composer.py
new file mode 100644
index 0000000..d5c6a7a
--- /dev/null
+++ b/tablib/packages/yaml3/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:
+
+    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, 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, 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 == '!':
+            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 == '!':
+            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 == '!':
+            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/yaml3/constructor.py b/tablib/packages/yaml3/constructor.py
new file mode 100644
index 0000000..bd25b79
--- /dev/null
+++ b/tablib/packages/yaml3/constructor.py
@@ -0,0 +1,686 @@
+
+__all__ = ['BaseConstructor', 'SafeConstructor', 'Constructor',
+    'ConstructorError']
+
+from .error import *
+from .nodes import *
+
+import collections, datetime, base64, binascii, re, sys, types
+
+class ConstructorError(MarkedYAMLError):
+    pass
+
+class BaseConstructor:
+
+    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 = next(generator)
+            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)
+            if not isinstance(key, collections.Hashable):
+                raise ConstructorError("while constructing a mapping", node.start_mark,
+                        "found unhashable key", 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
+
+    @classmethod
+    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
+
+    @classmethod
+    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
+
+class SafeConstructor(BaseConstructor):
+
+    def construct_scalar(self, node):
+        if isinstance(node, MappingNode):
+            for key_node, value_node in node.value:
+                if key_node.tag == 'tag:yaml.org,2002:value':
+                    return self.construct_scalar(value_node)
+        return super().construct_scalar(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 == '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 == 'tag:yaml.org,2002:value':
+                key_node.tag = '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 super().construct_mapping(node, deep=deep)
+
+    def construct_yaml_null(self, node):
+        self.construct_scalar(node)
+        return None
+
+    bool_values = {
+        'yes':      True,
+        'no':       False,
+        'true':     True,
+        'false':    False,
+        'on':       True,
+        '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 = 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 = 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):
+        try:
+            value = self.construct_scalar(node).encode('ascii')
+        except UnicodeEncodeError as exc:
+            raise ConstructorError(None, None,
+                    "failed to convert base64 data into ascii: %s" % exc,
+                    node.start_mark)
+        try:
+            if hasattr(base64, 'decodebytes'):
+                return base64.decodebytes(value)
+            else:
+                return base64.decodestring(value)
+        except binascii.Error as exc:
+            raise ConstructorError(None, None,
+                    "failed to decode base64 data: %s" % exc, node.start_mark)
+
+    timestamp_regexp = re.compile(
+            r'''^(?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):
+        return self.construct_scalar(node)
+
+    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,
+                node.start_mark)
+
+SafeConstructor.add_constructor(
+        'tag:yaml.org,2002:null',
+        SafeConstructor.construct_yaml_null)
+
+SafeConstructor.add_constructor(
+        'tag:yaml.org,2002:bool',
+        SafeConstructor.construct_yaml_bool)
+
+SafeConstructor.add_constructor(
+        'tag:yaml.org,2002:int',
+        SafeConstructor.construct_yaml_int)
+
+SafeConstructor.add_constructor(
+        'tag:yaml.org,2002:float',
+        SafeConstructor.construct_yaml_float)
+
+SafeConstructor.add_constructor(
+        'tag:yaml.org,2002:binary',
+        SafeConstructor.construct_yaml_binary)
+
+SafeConstructor.add_constructor(
+        'tag:yaml.org,2002:timestamp',
+        SafeConstructor.construct_yaml_timestamp)
+
+SafeConstructor.add_constructor(
+        'tag:yaml.org,2002:omap',
+        SafeConstructor.construct_yaml_omap)
+
+SafeConstructor.add_constructor(
+        'tag:yaml.org,2002:pairs',
+        SafeConstructor.construct_yaml_pairs)
+
+SafeConstructor.add_constructor(
+        'tag:yaml.org,2002:set',
+        SafeConstructor.construct_yaml_set)
+
+SafeConstructor.add_constructor(
+        'tag:yaml.org,2002:str',
+        SafeConstructor.construct_yaml_str)
+
+SafeConstructor.add_constructor(
+        'tag:yaml.org,2002:seq',
+        SafeConstructor.construct_yaml_seq)
+
+SafeConstructor.add_constructor(
+        '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)
+
+    def construct_python_unicode(self, node):
+        return self.construct_scalar(node)
+
+    def construct_python_bytes(self, node):
+        try:
+            value = self.construct_scalar(node).encode('ascii')
+        except UnicodeEncodeError as exc:
+            raise ConstructorError(None, None,
+                    "failed to convert base64 data into ascii: %s" % exc,
+                    node.start_mark)
+        try:
+            if hasattr(base64, 'decodebytes'):
+                return base64.decodebytes(value)
+            else:
+                return base64.decodestring(value)
+        except binascii.Error as exc:
+            raise ConstructorError(None, None,
+                    "failed to decode base64 data: %s" % exc, node.start_mark)
+
+    def construct_python_long(self, node):
+        return 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 as exc:
+            raise ConstructorError("while constructing a Python module", mark,
+                    "cannot find module %r (%s)" % (name, 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 '.' in name:
+            module_name, object_name = name.rsplit('.', 1)
+        else:
+            module_name = 'builtins'
+            object_name = name
+        try:
+            __import__(module_name)
+        except ImportError as exc:
+            raise ConstructorError("while constructing a Python object", mark,
+                    "cannot find module %r (%s)" % (module_name, 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, 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, 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, node.start_mark)
+        return self.find_python_module(suffix, node.start_mark)
+
+    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):
+            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(
+    'tag:yaml.org,2002:python/none',
+    Constructor.construct_yaml_null)
+
+Constructor.add_constructor(
+    'tag:yaml.org,2002:python/bool',
+    Constructor.construct_yaml_bool)
+
+Constructor.add_constructor(
+    'tag:yaml.org,2002:python/str',
+    Constructor.construct_python_str)
+
+Constructor.add_constructor(
+    'tag:yaml.org,2002:python/unicode',
+    Constructor.construct_python_unicode)
+
+Constructor.add_constructor(
+    'tag:yaml.org,2002:python/bytes',
+    Constructor.construct_python_bytes)
+
+Constructor.add_constructor(
+    'tag:yaml.org,2002:python/int',
+    Constructor.construct_yaml_int)
+
+Constructor.add_constructor(
+    'tag:yaml.org,2002:python/long',
+    Constructor.construct_python_long)
+
+Constructor.add_constructor(
+    'tag:yaml.org,2002:python/float',
+    Constructor.construct_yaml_float)
+
+Constructor.add_constructor(
+    'tag:yaml.org,2002:python/complex',
+    Constructor.construct_python_complex)
+
+Constructor.add_constructor(
+    'tag:yaml.org,2002:python/list',
+    Constructor.construct_yaml_seq)
+
+Constructor.add_constructor(
+    'tag:yaml.org,2002:python/tuple',
+    Constructor.construct_python_tuple)
+
+Constructor.add_constructor(
+    'tag:yaml.org,2002:python/dict',
+    Constructor.construct_yaml_map)
+
+Constructor.add_multi_constructor(
+    'tag:yaml.org,2002:python/name:',
+    Constructor.construct_python_name)
+
+Constructor.add_multi_constructor(
+    'tag:yaml.org,2002:python/module:',
+    Constructor.construct_python_module)
+
+Constructor.add_multi_constructor(
+    'tag:yaml.org,2002:python/object:',
+    Constructor.construct_python_object)
+
+Constructor.add_multi_constructor(
+    'tag:yaml.org,2002:python/object/apply:',
+    Constructor.construct_python_object_apply)
+
+Constructor.add_multi_constructor(
+    'tag:yaml.org,2002:python/object/new:',
+    Constructor.construct_python_object_new)
+
diff --git a/tablib/packages/yaml3/cyaml.py b/tablib/packages/yaml3/cyaml.py
new file mode 100644
index 0000000..d5cb87e
--- /dev/null
+++ b/tablib/packages/yaml3/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/yaml3/dumper.py b/tablib/packages/yaml3/dumper.py
new file mode 100644
index 0000000..0b69128
--- /dev/null
+++ b/tablib/packages/yaml3/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/yaml3/emitter.py b/tablib/packages/yaml3/emitter.py
new file mode 100644
index 0000000..8947d04
--- /dev/null
+++ b/tablib/packages/yaml3/emitter.py
@@ -0,0 +1,1132 @@
+
+# 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:
+    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:
+
+    DEFAULT_TAG_PREFIXES = {
+        '!' : '!',
+        'tag:yaml.org,2002:' : '!!',
+    }
+
+    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 = '\n'
+        if line_break in ['\r', '\n', '\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 hasattr(self.stream, 'encoding'):
+                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('...', 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 = sorted(self.event.tags.keys())
+                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('---', 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('...', 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('...', 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('&')
+            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('*')
+        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('[', 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(']', 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(',', False)
+                self.write_indent()
+            self.write_indicator(']', False)
+            self.state = self.states.pop()
+        else:
+            self.write_indicator(',', 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('{', 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('}', 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('?', 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(',', False)
+                self.write_indent()
+            self.write_indicator('}', False)
+            self.state = self.states.pop()
+        else:
+            self.write_indicator(',', 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('?', True)
+                self.states.append(self.expect_flow_mapping_value)
+                self.expect_node(mapping=True)
+
+    def expect_flow_mapping_simple_value(self):
+        self.write_indicator(':', 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(':', 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('-', 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('?', 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(':', 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(':', 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 == '')
+
+    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 = '!'
+                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 '%d.%d' % (major, minor)
+
+    def prepare_tag_handle(self, handle):
+        if not handle:
+            raise EmitterError("tag handle must not be empty")
+        if handle[0] != '!' or handle[-1] != '!':
+            raise EmitterError("tag handle must start and end with '!': %r" % handle)
+        for ch in handle[1:-1]:
+            if not ('0' <= ch <= '9' or 'A' <= ch <= 'Z' or 'a' <= ch <= 'z'    \
+                    or ch in '-_'):
+                raise EmitterError("invalid character %r in the tag handle: %r"
+                        % (ch, handle))
+        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] == '!':
+            end = 1
+        while end < len(prefix):
+            ch = prefix[end]
+            if '0' <= ch <= '9' or 'A' <= ch <= 'Z' or 'a' <= ch <= 'z' \
+                    or ch in '-;/?!:@&=+$,_.~*\'()[]':
+                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('%%%02X' % ord(ch))
+        if start < end:
+            chunks.append(prefix[start:end])
+        return ''.join(chunks)
+
+    def prepare_tag(self, tag):
+        if not tag:
+            raise EmitterError("tag must not be empty")
+        if tag == '!':
+            return tag
+        handle = None
+        suffix = tag
+        prefixes = sorted(self.tag_prefixes.keys())
+        for prefix in prefixes:
+            if tag.startswith(prefix)   \
+                    and (prefix == '!' 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 '0' <= ch <= '9' or 'A' <= ch <= 'Z' or 'a' <= ch <= 'z' \
+                    or ch in '-;/?:@&=+$,_.~*\'()[]'   \
+                    or (ch == '!' and handle != '!'):
+                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('%%%02X' % ord(ch))
+        if start < end:
+            chunks.append(suffix[start:end])
+        suffix_text = ''.join(chunks)
+        if handle:
+            return '%s%s' % (handle, suffix_text)
+        else:
+            return '!<%s>' % suffix_text
+
+    def prepare_anchor(self, anchor):
+        if not anchor:
+            raise EmitterError("anchor must not be empty")
+        for ch in anchor:
+            if not ('0' <= ch <= '9' or 'A' <= ch <= 'Z' or 'a' <= ch <= 'z'    \
+                    or ch in '-_'):
+                raise EmitterError("invalid character %r in the anchor: %r"
+                        % (ch, anchor))
+        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('---') or scalar.startswith('...'):
+            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 '\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 '#,[]{}&*!|>\'\"%@`': 
+                    flow_indicators = True
+                    block_indicators = True
+                if ch in '?:':
+                    flow_indicators = True
+                    if followed_by_whitespace:
+                        block_indicators = True
+                if ch == '-' and followed_by_whitespace:
+                    flow_indicators = True
+                    block_indicators = True
+            else:
+                # Some indicators cannot appear within a scalar as well.
+                if ch in ',?[]{}':
+                    flow_indicators = True
+                if ch == ':':
+                    flow_indicators = True
+                    if followed_by_whitespace:
+                        block_indicators = True
+                if ch == '#' and preceeded_by_whitespace:
+                    flow_indicators = True
+                    block_indicators = True
+
+            # Check for line breaks, special, and unicode characters.
+            if ch in '\n\x85\u2028\u2029':
+                line_breaks = True
+            if not (ch == '\n' or '\x20' <= ch <= '\x7E'):
+                if (ch == '\x85' or '\xA0' <= ch <= '\uD7FF'
+                        or '\uE000' <= ch <= '\uFFFD') and ch != '\uFEFF':
+                    unicode_characters = True
+                    if not self.allow_unicode:
+                        special_characters = True
+                else:
+                    special_characters = True
+
+            # Detect important whitespace combinations.
+            if ch == ' ':
+                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 '\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 '\0 \t\r\n\x85\u2028\u2029')
+            followed_by_whitespace = (index+1 >= len(scalar) or
+                    scalar[index+1] in '\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('\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 = ' '+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 = ' '*(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 = '%%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 = '%%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('\'', 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 != ' ':
+                    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 '\n\x85\u2028\u2029':
+                    if text[start] == '\n':
+                        self.write_line_break()
+                    for br in text[start:end]:
+                        if br == '\n':
+                            self.write_line_break()
+                        else:
+                            self.write_line_break(br)
+                    self.write_indent()
+                    start = end
+            else:
+                if ch is None or ch in ' \n\x85\u2028\u2029' or ch == '\'':
+                    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 == '\'':
+                data = '\'\''
+                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 == ' ')
+                breaks = (ch in '\n\x85\u2028\u2029')
+            end += 1
+        self.write_indicator('\'', False)
+
+    ESCAPE_REPLACEMENTS = {
+        '\0':       '0',
+        '\x07':     'a',
+        '\x08':     'b',
+        '\x09':     't',
+        '\x0A':     'n',
+        '\x0B':     'v',
+        '\x0C':     'f',
+        '\x0D':     'r',
+        '\x1B':     'e',
+        '\"':       '\"',
+        '\\':       '\\',
+        '\x85':     'N',
+        '\xA0':     '_',
+        '\u2028':   'L',
+        '\u2029':   'P',
+    }
+
+    def write_double_quoted(self, text, split=True):
+        self.write_indicator('"', True)
+        start = end = 0
+        while end <= len(text):
+            ch = None
+            if end < len(text):
+                ch = text[end]
+            if ch is None or ch in '"\\\x85\u2028\u2029\uFEFF' \
+                    or not ('\x20' <= ch <= '\x7E'
+                        or (self.allow_unicode
+                            and ('\xA0' <= ch <= '\uD7FF'
+                                or '\uE000' <= ch <= '\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 = '\\'+self.ESCAPE_REPLACEMENTS[ch]
+                    elif ch <= '\xFF':
+                        data = '\\x%02X' % ord(ch)
+                    elif ch <= '\uFFFF':
+                        data = '\\u%04X' % ord(ch)
+                    else:
+                        data = '\\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 == ' ' or start >= end)    \
+                    and self.column+(end-start) > self.best_width and split:
+                data = text[start:end]+'\\'
+                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] == ' ':
+                    data = '\\'
+                    self.column += len(data)
+                    if self.encoding:
+                        data = data.encode(self.encoding)
+                    self.stream.write(data)
+            end += 1
+        self.write_indicator('"', False)
+
+    def determine_block_hints(self, text):
+        hints = ''
+        if text:
+            if text[0] in ' \n\x85\u2028\u2029':
+                hints += str(self.best_indent)
+            if text[-1] not in '\n\x85\u2028\u2029':
+                hints += '-'
+            elif len(text) == 1 or text[-2] in '\n\x85\u2028\u2029':
+                hints += '+'
+        return hints
+
+    def write_folded(self, text):
+        hints = self.determine_block_hints(text)
+        self.write_indicator('>'+hints, True)
+        if hints[-1:] == '+':
+            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 '\n\x85\u2028\u2029':
+                    if not leading_space and ch is not None and ch != ' '   \
+                            and text[start] == '\n':
+                        self.write_line_break()
+                    leading_space = (ch == ' ')
+                    for br in text[start:end]:
+                        if br == '\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 != ' ':
+                    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 ' \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 '\n\x85\u2028\u2029')
+                spaces = (ch == ' ')
+            end += 1
+
+    def write_literal(self, text):
+        hints = self.determine_block_hints(text)
+        self.write_indicator('|'+hints, True)
+        if hints[-1:] == '+':
+            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 '\n\x85\u2028\u2029':
+                    for br in text[start:end]:
+                        if br == '\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 '\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 '\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 = ' '
+            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 != ' ':
+                    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 '\n\x85\u2028\u2029':
+                    if text[start] == '\n':
+                        self.write_line_break()
+                    for br in text[start:end]:
+                        if br == '\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 ' \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 == ' ')
+                breaks = (ch in '\n\x85\u2028\u2029')
+            end += 1
+
diff --git a/tablib/packages/yaml3/error.py b/tablib/packages/yaml3/error.py
new file mode 100644
index 0000000..b796b4d
--- /dev/null
+++ b/tablib/packages/yaml3/error.py
@@ -0,0 +1,75 @@
+
+__all__ = ['Mark', 'YAMLError', 'MarkedYAMLError']
+
+class Mark:
+
+    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 '\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 '\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]
+        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/yaml3/events.py b/tablib/packages/yaml3/events.py
new file mode 100644
index 0000000..f79ad38
--- /dev/null
+++ b/tablib/packages/yaml3/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/yaml3/loader.py b/tablib/packages/yaml3/loader.py
new file mode 100644
index 0000000..08c8f01
--- /dev/null
+++ b/tablib/packages/yaml3/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/yaml3/nodes.py b/tablib/packages/yaml3/nodes.py
new file mode 100644
index 0000000..c4f070c
--- /dev/null
+++ b/tablib/packages/yaml3/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/yaml3/parser.py b/tablib/packages/yaml3/parser.py
new file mode 100644
index 0000000..c147dd6
--- /dev/null
+++ b/tablib/packages/yaml3/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:
+    # Since writing a recursive-descendant parser is a straightforward task, we
+    # do not give many comments here.
+
+    DEFAULT_TAGS = {
+        '!':   '!',
+        '!!':  '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 == '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 == 'TAG':
+                handle, prefix = token.value
+                if handle in self.tag_handles:
+                    raise ParserError(None, None,
+                            "duplicate tag handle %r" % handle,
+                            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,
+                                tag_mark)
+                    tag = self.tag_handles[handle]+suffix
+                else:
+                    tag = suffix
+            #if tag == '!':
+            #    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 == '!')
+            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 == '!':
+                        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), '',
+                            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), '', mark, mark)
+
diff --git a/tablib/packages/yaml3/reader.py b/tablib/packages/yaml3/reader.py
new file mode 100644
index 0000000..f70e920
--- /dev/null
+++ b/tablib/packages/yaml3/reader.py
@@ -0,0 +1,192 @@
+# 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
+
+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, bytes):
+            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 a unicode string,
+    # - checks if characters are in allowed range,
+    # - adds '\0' to the end.
+
+    # Reader accepts
+    #  - a `bytes` object,
+    #  - a `str` 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 = ''
+        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, str):
+            self.name = "<unicode string>"
+            self.check_printable(stream)
+            self.buffer = stream+'\0'
+        elif isinstance(stream, bytes):
+            self.name = "<byte string>"
+            self.raw_buffer = stream
+            self.determine_encoding()
+        else:
+            self.stream = stream
+            self.name = getattr(stream, 'name', "<file>")
+            self.eof = False
+            self.raw_buffer = None
+            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 '\n\x85\u2028\u2029'  \
+                    or (ch == '\r' and self.buffer[self.pointer] != '\n'):
+                self.line += 1
+                self.column = 0
+            elif ch != '\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 (self.raw_buffer is None or len(self.raw_buffer) < 2):
+            self.update_raw()
+        if isinstance(self.raw_buffer, bytes):
+            if self.raw_buffer.startswith(codecs.BOM_UTF16_LE):
+                self.raw_decode = codecs.utf_16_le_decode
+                self.encoding = 'utf-16-le'
+            elif self.raw_buffer.startswith(codecs.BOM_UTF16_BE):
+                self.raw_decode = codecs.utf_16_be_decode
+                self.encoding = 'utf-16-be'
+            else:
+                self.raw_decode = codecs.utf_8_decode
+                self.encoding = 'utf-8'
+        self.update(1)
+
+    NON_PRINTABLE = re.compile('[^\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 as exc:
+                    character = self.raw_buffer[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 += '\0'
+                self.raw_buffer = None
+                break
+
+    def update_raw(self, size=4096):
+        data = self.stream.read(size)
+        if self.raw_buffer is None:
+            self.raw_buffer = data
+        else:
+            self.raw_buffer += data
+        self.stream_pointer += len(data)
+        if not data:
+            self.eof = True
+
+#try:
+#    import psyco
+#    psyco.bind(Reader)
+#except ImportError:
+#    pass
+
diff --git a/tablib/packages/yaml3/representer.py b/tablib/packages/yaml3/representer.py
new file mode 100644
index 0000000..67cd6fd
--- /dev/null
+++ b/tablib/packages/yaml3/representer.py
@@ -0,0 +1,374 @@
+
+__all__ = ['BaseRepresenter', 'SafeRepresenter', 'Representer',
+    'RepresenterError']
+
+from .error import *
+from .nodes import *
+
+import datetime, sys, copyreg, types, base64
+
+class RepresenterError(YAMLError):
+    pass
+
+class BaseRepresenter:
+
+    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 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 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, str(data))
+        #if alias_key is not None:
+        #    self.represented_objects[alias_key] = node
+        return node
+
+    @classmethod
+    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
+
+    @classmethod
+    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
+
+    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 = list(mapping.items())
+            try:
+                mapping = sorted(mapping)
+            except TypeError:
+                pass
+        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, bytes, bool, int, float)):
+            return True
+
+    def represent_none(self, data):
+        return self.represent_scalar('tag:yaml.org,2002:null', 'null')
+
+    def represent_str(self, data):
+        return self.represent_scalar('tag:yaml.org,2002:str', data)
+
+    def represent_binary(self, data):
+        if hasattr(base64, 'encodebytes'):
+            data = base64.encodebytes(data).decode('ascii')
+        else:
+            data = base64.encodestring(data).decode('ascii')
+        return self.represent_scalar('tag:yaml.org,2002:binary', data, style='|')
+
+    def represent_bool(self, data):
+        if data:
+            value = 'true'
+        else:
+            value = 'false'
+        return self.represent_scalar('tag:yaml.org,2002:bool', value)
+
+    def represent_int(self, data):
+        return self.represent_scalar('tag:yaml.org,2002:int', str(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 = '.nan'
+        elif data == self.inf_value:
+            value = '.inf'
+        elif data == -self.inf_value:
+            value = '-.inf'
+        else:
+            value = 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 '.' not in value and 'e' in value:
+                value = value.replace('e', '.0e', 1)
+        return self.represent_scalar('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('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('tag:yaml.org,2002:map', data)
+
+    def represent_set(self, data):
+        value = {}
+        for key in data:
+            value[key] = None
+        return self.represent_mapping('tag:yaml.org,2002:set', value)
+
+    def represent_date(self, data):
+        value = data.isoformat()
+        return self.represent_scalar('tag:yaml.org,2002:timestamp', value)
+
+    def represent_datetime(self, data):
+        value = data.isoformat(' ')
+        return self.represent_scalar('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(bytes,
+        SafeRepresenter.represent_binary)
+
+SafeRepresenter.add_representer(bool,
+        SafeRepresenter.represent_bool)
+
+SafeRepresenter.add_representer(int,
+        SafeRepresenter.represent_int)
+
+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_complex(self, data):
+        if data.imag == 0.0:
+            data = '%r' % data.real
+        elif data.real == 0.0:
+            data = '%rj' % data.imag
+        elif data.imag > 0:
+            data = '%r+%rj' % (data.real, data.imag)
+        else:
+            data = '%r%rj' % (data.real, data.imag)
+        return self.represent_scalar('tag:yaml.org,2002:python/complex', data)
+
+    def represent_tuple(self, data):
+        return self.represent_sequence('tag:yaml.org,2002:python/tuple', data)
+
+    def represent_name(self, data):
+        name = '%s.%s' % (data.__module__, data.__name__)
+        return self.represent_scalar('tag:yaml.org,2002:python/name:'+name, '')
+
+    def represent_module(self, data):
+        return self.represent_scalar(
+                'tag:yaml.org,2002:python/module:'+data.__name__, '')
+
+    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 copyreg.dispatch_table:
+            reduce = copyreg.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 = 'tag:yaml.org,2002:python/object/new:'
+            newobj = True
+        else:
+            tag = 'tag:yaml.org,2002:python/object/apply:'
+            newobj = False
+        function_name = '%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(
+                    '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(complex,
+        Representer.represent_complex)
+
+Representer.add_representer(tuple,
+        Representer.represent_tuple)
+
+Representer.add_representer(type,
+        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(object,
+        Representer.represent_object)
+
diff --git a/tablib/packages/yaml3/resolver.py b/tablib/packages/yaml3/resolver.py
new file mode 100644
index 0000000..0eece25
--- /dev/null
+++ b/tablib/packages/yaml3/resolver.py
@@ -0,0 +1,224 @@
+
+__all__ = ['BaseResolver', 'Resolver']
+
+from .error import *
+from .nodes import *
+
+import re
+
+class ResolverError(YAMLError):
+    pass
+
+class BaseResolver:
+
+    DEFAULT_SCALAR_TAG = 'tag:yaml.org,2002:str'
+    DEFAULT_SEQUENCE_TAG = 'tag:yaml.org,2002:seq'
+    DEFAULT_MAPPING_TAG = 'tag:yaml.org,2002:map'
+
+    yaml_implicit_resolvers = {}
+    yaml_path_resolvers = {}
+
+    def __init__(self):
+        self.resolver_exact_paths = []
+        self.resolver_prefix_paths = []
+
+    @classmethod
+    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))
+
+    @classmethod
+    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, str) \
+                    and node_check is not None:
+                raise ResolverError("Invalid node checker: %s" % node_check)
+            if not isinstance(index_check, (str, 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
+
+    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, str):
+            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, str):
+            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 == '':
+                resolvers = self.yaml_implicit_resolvers.get('', [])
+            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(
+        'tag:yaml.org,2002:bool',
+        re.compile(r'''^(?:yes|Yes|YES|no|No|NO
+                    |true|True|TRUE|false|False|FALSE
+                    |on|On|ON|off|Off|OFF)$''', re.X),
+        list('yYnNtTfFoO'))
+
+Resolver.add_implicit_resolver(
+        'tag:yaml.org,2002:float',
+        re.compile(r'''^(?:[-+]?(?:[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))$''', re.X),
+        list('-+0123456789.'))
+
+Resolver.add_implicit_resolver(
+        'tag:yaml.org,2002:int',
+        re.compile(r'''^(?:[-+]?0b[0-1_]+
+                    |[-+]?0[0-7_]+
+                    |[-+]?(?:0|[1-9][0-9_]*)
+                    |[-+]?0x[0-9a-fA-F_]+
+                    |[-+]?[1-9][0-9_]*(?::[0-5]?[0-9])+)$''', re.X),
+        list('-+0123456789'))
+
+Resolver.add_implicit_resolver(
+        'tag:yaml.org,2002:merge',
+        re.compile(r'^(?:<<)$'),
+        ['<'])
+
+Resolver.add_implicit_resolver(
+        'tag:yaml.org,2002:null',
+        re.compile(r'''^(?: ~
+                    |null|Null|NULL
+                    | )$''', re.X),
+        ['~', 'n', 'N', ''])
+
+Resolver.add_implicit_resolver(
+        'tag:yaml.org,2002:timestamp',
+        re.compile(r'''^(?:[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])?))?)$''', re.X),
+        list('0123456789'))
+
+Resolver.add_implicit_resolver(
+        'tag:yaml.org,2002:value',
+        re.compile(r'^(?:=)$'),
+        ['='])
+
+# The following resolver is only for documentation purposes. It cannot work
+# because plain scalars cannot start with '!', '&', or '*'.
+Resolver.add_implicit_resolver(
+        'tag:yaml.org,2002:yaml',
+        re.compile(r'^(?:!|&|\*)$'),
+        list('!&*'))
+
diff --git a/tablib/packages/yaml3/scanner.py b/tablib/packages/yaml3/scanner.py
new file mode 100644
index 0000000..494d975
--- /dev/null
+++ b/tablib/packages/yaml3/scanner.py
@@ -0,0 +1,1448 @@
+
+# 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:
+    # 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:
+
+    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 == '\0':
+            return self.fetch_stream_end()
+
+        # Is it a directive?
+        if ch == '%' and self.check_directive():
+            return self.fetch_directive()
+
+        # Is it the document start?
+        if ch == '-' and self.check_document_start():
+            return self.fetch_document_start()
+
+        # Is it the document end?
+        if ch == '.' and self.check_document_end():
+            return self.fetch_document_end()
+
+        # TODO: support for BOM within a stream.
+        #if ch == '\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 == '[':
+            return self.fetch_flow_sequence_start()
+
+        # Is it the flow mapping start indicator?
+        if ch == '{':
+            return self.fetch_flow_mapping_start()
+
+        # Is it the flow sequence end indicator?
+        if ch == ']':
+            return self.fetch_flow_sequence_end()
+
+        # Is it the flow mapping end indicator?
+        if ch == '}':
+            return self.fetch_flow_mapping_end()
+
+        # Is it the flow entry indicator?
+        if ch == ',':
+            return self.fetch_flow_entry()
+
+        # Is it the block entry indicator?
+        if ch == '-' and self.check_block_entry():
+            return self.fetch_block_entry()
+
+        # Is it the key indicator?
+        if ch == '?' and self.check_key():
+            return self.fetch_key()
+
+        # Is it the value indicator?
+        if ch == ':' and self.check_value():
+            return self.fetch_value()
+
+        # Is it an alias?
+        if ch == '*':
+            return self.fetch_alias()
+
+        # Is it an anchor?
+        if ch == '&':
+            return self.fetch_anchor()
+
+        # Is it a tag?
+        if ch == '!':
+            return self.fetch_tag()
+
+        # Is it a literal scalar?
+        if ch == '|' and not self.flow_level:
+            return self.fetch_literal()
+
+        # Is it a folded scalar?
+        if ch == '>' and not self.flow_level:
+            return self.fetch_folded()
+
+        # Is it a single quoted scalar?
+        if ch == '\'':
+            return self.fetch_single()
+
+        # Is it a double quoted scalar?
+        if ch == '\"':
+            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,
+                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 list(self.possible_simple_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) == '---'  \
+                    and self.peek(3) in '\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) == '...'  \
+                    and self.peek(3) in '\0 \t\r\n\x85\u2028\u2029':
+                return True
+
+    def check_block_entry(self):
+
+        # BLOCK-ENTRY:      '-' (' '|'\n')
+        return self.peek(1) in '\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 '\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 '\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 '\0 \t\r\n\x85\u2028\u2029-?:,[]{}#&*!|>\'\"%@`'  \
+                or (self.peek(1) not in '\0 \t\r\n\x85\u2028\u2029'
+                        and (ch == '-' or (not self.flow_level and ch in '?:')))
+
+    # 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() == '\uFEFF':
+            self.forward()
+        found = False
+        while not found:
+            while self.peek() == ' ':
+                self.forward()
+            if self.peek() == '#':
+                while self.peek() not in '\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 == 'YAML':
+            value = self.scan_yaml_directive_value(start_mark)
+            end_mark = self.get_mark()
+        elif name == '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 '\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 '0' <= ch <= '9' or 'A' <= ch <= 'Z' or 'a' <= ch <= 'z'  \
+                or ch in '-_':
+            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, self.get_mark())
+        value = self.prefix(length)
+        self.forward(length)
+        ch = self.peek()
+        if ch not in '\0 \r\n\x85\u2028\u2029':
+            raise ScannerError("while scanning a directive", start_mark,
+                    "expected alphabetic or numeric character, but found %r"
+                    % ch, self.get_mark())
+        return value
+
+    def scan_yaml_directive_value(self, start_mark):
+        # See the specification for details.
+        while self.peek() == ' ':
+            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(),
+                    self.get_mark())
+        self.forward()
+        minor = self.scan_yaml_directive_number(start_mark)
+        if self.peek() not in '\0 \r\n\x85\u2028\u2029':
+            raise ScannerError("while scanning a directive", start_mark,
+                    "expected a digit or ' ', but found %r" % self.peek(),
+                    self.get_mark())
+        return (major, minor)
+
+    def scan_yaml_directive_number(self, start_mark):
+        # See the specification for details.
+        ch = self.peek()
+        if not ('0' <= ch <= '9'):
+            raise ScannerError("while scanning a directive", start_mark,
+                    "expected a digit, but found %r" % ch, self.get_mark())
+        length = 0
+        while '0' <= self.peek(length) <= '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() == ' ':
+            self.forward()
+        handle = self.scan_tag_directive_handle(start_mark)
+        while self.peek() == ' ':
+            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 != ' ':
+            raise ScannerError("while scanning a directive", start_mark,
+                    "expected ' ', but found %r" % ch, 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 '\0 \r\n\x85\u2028\u2029':
+            raise ScannerError("while scanning a directive", start_mark,
+                    "expected ' ', but found %r" % ch, self.get_mark())
+        return value
+
+    def scan_directive_ignored_line(self, start_mark):
+        # See the specification for details.
+        while self.peek() == ' ':
+            self.forward()
+        if self.peek() == '#':
+            while self.peek() not in '\0\r\n\x85\u2028\u2029':
+                self.forward()
+        ch = self.peek()
+        if ch not in '\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, 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 == '*':
+            name = 'alias'
+        else:
+            name = 'anchor'
+        self.forward()
+        length = 0
+        ch = self.peek(length)
+        while '0' <= ch <= '9' or 'A' <= ch <= 'Z' or 'a' <= ch <= 'z'  \
+                or ch in '-_':
+            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, self.get_mark())
+        value = self.prefix(length)
+        self.forward(length)
+        ch = self.peek()
+        if ch not in '\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, 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 == '<':
+            handle = None
+            self.forward(2)
+            suffix = self.scan_tag_uri('tag', start_mark)
+            if self.peek() != '>':
+                raise ScannerError("while parsing a tag", start_mark,
+                        "expected '>', but found %r" % self.peek(),
+                        self.get_mark())
+            self.forward()
+        elif ch in '\0 \t\r\n\x85\u2028\u2029':
+            handle = None
+            suffix = '!'
+            self.forward()
+        else:
+            length = 1
+            use_handle = False
+            while ch not in '\0 \r\n\x85\u2028\u2029':
+                if ch == '!':
+                    use_handle = True
+                    break
+                length += 1
+                ch = self.peek(length)
+            handle = '!'
+            if use_handle:
+                handle = self.scan_tag_handle('tag', start_mark)
+            else:
+                handle = '!'
+                self.forward()
+            suffix = self.scan_tag_uri('tag', start_mark)
+        ch = self.peek()
+        if ch not in '\0 \r\n\x85\u2028\u2029':
+            raise ScannerError("while scanning a tag", start_mark,
+                    "expected ' ', but found %r" % ch, 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 = ''
+
+        # Scan the inner part of the block scalar.
+        while self.column == indent and self.peek() != '\0':
+            chunks.extend(breaks)
+            leading_non_space = self.peek() not in ' \t'
+            length = 0
+            while self.peek(length) not in '\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() != '\0':
+
+                # Unfortunately, folding rules are ambiguous.
+                #
+                # This is the folding according to the specification:
+                
+                if folded and line_break == '\n'    \
+                        and leading_non_space and self.peek() not in ' \t':
+                    if not breaks:
+                        chunks.append(' ')
+                else:
+                    chunks.append(line_break)
+                
+                # This is Clark Evans's interpretation (also in the spec
+                # examples):
+                #
+                #if folded and line_break == '\n':
+                #    if not breaks:
+                #        if self.peek() not in ' \t':
+                #            chunks.append(' ')
+                #        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(''.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 '+-':
+            if ch == '+':
+                chomping = True
+            else:
+                chomping = False
+            self.forward()
+            ch = self.peek()
+            if ch in '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 '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 '+-':
+                if ch == '+':
+                    chomping = True
+                else:
+                    chomping = False
+                self.forward()
+        ch = self.peek()
+        if ch not in '\0 \r\n\x85\u2028\u2029':
+            raise ScannerError("while scanning a block scalar", start_mark,
+                    "expected chomping or indentation indicators, but found %r"
+                    % ch, self.get_mark())
+        return chomping, increment
+
+    def scan_block_scalar_ignored_line(self, start_mark):
+        # See the specification for details.
+        while self.peek() == ' ':
+            self.forward()
+        if self.peek() == '#':
+            while self.peek() not in '\0\r\n\x85\u2028\u2029':
+                self.forward()
+        ch = self.peek()
+        if ch not in '\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,
+                    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 ' \r\n\x85\u2028\u2029':
+            if self.peek() != ' ':
+                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() == ' ':
+            self.forward()
+        while self.peek() in '\r\n\x85\u2028\u2029':
+            chunks.append(self.scan_line_break())
+            end_mark = self.get_mark()
+            while self.column < indent and self.peek() == ' ':
+                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(''.join(chunks), False, start_mark, end_mark,
+                style)
+
+    ESCAPE_REPLACEMENTS = {
+        '0':    '\0',
+        'a':    '\x07',
+        'b':    '\x08',
+        't':    '\x09',
+        '\t':   '\x09',
+        'n':    '\x0A',
+        'v':    '\x0B',
+        'f':    '\x0C',
+        'r':    '\x0D',
+        'e':    '\x1B',
+        ' ':    '\x20',
+        '\"':   '\"',
+        '\\':   '\\',
+        'N':    '\x85',
+        '_':    '\xA0',
+        'L':    '\u2028',
+        'P':    '\u2029',
+    }
+
+    ESCAPE_CODES = {
+        'x':    2,
+        'u':    4,
+        '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 '\'\"\\\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 == '\'' and self.peek(1) == '\'':
+                chunks.append('\'')
+                self.forward(2)
+            elif (double and ch == '\'') or (not double and ch in '\"\\'):
+                chunks.append(ch)
+                self.forward()
+            elif double and ch == '\\':
+                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 '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)), self.get_mark())
+                    code = int(self.prefix(length), 16)
+                    chunks.append(chr(code))
+                    self.forward(length)
+                elif ch in '\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, 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 ' \t':
+            length += 1
+        whitespaces = self.prefix(length)
+        self.forward(length)
+        ch = self.peek()
+        if ch == '\0':
+            raise ScannerError("while scanning a quoted scalar", start_mark,
+                    "found unexpected end of stream", self.get_mark())
+        elif ch in '\r\n\x85\u2028\u2029':
+            line_break = self.scan_line_break()
+            breaks = self.scan_flow_scalar_breaks(double, start_mark)
+            if line_break != '\n':
+                chunks.append(line_break)
+            elif not breaks:
+                chunks.append(' ')
+            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 == '---' or prefix == '...')   \
+                    and self.peek(3) in '\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 ' \t':
+                self.forward()
+            if self.peek() in '\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() == '#':
+                break
+            while True:
+                ch = self.peek(length)
+                if ch in '\0 \t\r\n\x85\u2028\u2029'    \
+                        or (not self.flow_level and ch == ':' and
+                                self.peek(length+1) in '\0 \t\r\n\x85\u2028\u2029') \
+                        or (self.flow_level and ch in ',:?[]{}'):
+                    break
+                length += 1
+            # It's not clear what we should do with ':' in the flow context.
+            if (self.flow_level and ch == ':'
+                    and self.peek(length+1) not in '\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() == '#' \
+                    or (not self.flow_level and self.column < indent):
+                break
+        return ScalarToken(''.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 ' ':
+            length += 1
+        whitespaces = self.prefix(length)
+        self.forward(length)
+        ch = self.peek()
+        if ch in '\r\n\x85\u2028\u2029':
+            line_break = self.scan_line_break()
+            self.allow_simple_key = True
+            prefix = self.prefix(3)
+            if (prefix == '---' or prefix == '...')   \
+                    and self.peek(3) in '\0 \t\r\n\x85\u2028\u2029':
+                return
+            breaks = []
+            while self.peek() in ' \r\n\x85\u2028\u2029':
+                if self.peek() == ' ':
+                    self.forward()
+                else:
+                    breaks.append(self.scan_line_break())
+                    prefix = self.prefix(3)
+                    if (prefix == '---' or prefix == '...')   \
+                            and self.peek(3) in '\0 \t\r\n\x85\u2028\u2029':
+                        return
+            if line_break != '\n':
+                chunks.append(line_break)
+            elif not breaks:
+                chunks.append(' ')
+            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 != '!':
+            raise ScannerError("while scanning a %s" % name, start_mark,
+                    "expected '!', but found %r" % ch, self.get_mark())
+        length = 1
+        ch = self.peek(length)
+        if ch != ' ':
+            while '0' <= ch <= '9' or 'A' <= ch <= 'Z' or 'a' <= ch <= 'z'  \
+                    or ch in '-_':
+                length += 1
+                ch = self.peek(length)
+            if ch != '!':
+                self.forward(length)
+                raise ScannerError("while scanning a %s" % name, start_mark,
+                        "expected '!', but found %r" % ch, 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 '0' <= ch <= '9' or 'A' <= ch <= 'Z' or 'a' <= ch <= 'z'  \
+                or ch in '-;/?:@&=+$,_.!~*\'()[]%':
+            if ch == '%':
+                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, self.get_mark())
+        return ''.join(chunks)
+
+    def scan_uri_escapes(self, name, start_mark):
+        # See the specification for details.
+        codes = []
+        mark = self.get_mark()
+        while self.peek() == '%':
+            self.forward()
+            for k in range(2):
+                if self.peek(k) not in '0123456789ABCDEFabcdef':
+                    raise ScannerError("while scanning a %s" % name, start_mark,
+                            "expected URI escape sequence of 2 hexdecimal numbers, but found %r"
+                            % self.peek(k), self.get_mark())
+            codes.append(int(self.prefix(2), 16))
+            self.forward(2)
+        try:
+            value = bytes(codes).decode('utf-8')
+        except UnicodeDecodeError as 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 '\r\n\x85':
+            if self.prefix(2) == '\r\n':
+                self.forward(2)
+            else:
+                self.forward()
+            return '\n'
+        elif ch in '\u2028\u2029':
+            self.forward()
+            return ch
+        return ''
+
+#try:
+#    import psyco
+#    psyco.bind(Scanner)
+#except ImportError:
+#    pass
+
diff --git a/tablib/packages/yaml3/serializer.py b/tablib/packages/yaml3/serializer.py
new file mode 100644
index 0000000..fe911e6
--- /dev/null
+++ b/tablib/packages/yaml3/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:
+
+    ANCHOR_TEMPLATE = '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/yaml3/tokens.py b/tablib/packages/yaml3/tokens.py
new file mode 100644
index 0000000..4d0b48a
--- /dev/null
+++ b/tablib/packages/yaml3/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
+
diff --git a/test_suite.sh b/test_suite.sh
deleted file mode 100755
index 5a1e7be..0000000
--- a/test_suite.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-rm -fr nosetests.xml
-tox
-# coverage xml
-rm -fr pylint.txt
-# pylint -d W0312 -d W0212 -d E1101 -d E0202 -d W0102 -d E0102 -f parseable ./tablib > pylint.txt || true
\ No newline at end of file
diff --git a/test_tablib.py b/test_tablib.py
index e4a4d11..320c759 100755
--- a/test_tablib.py
+++ b/test_tablib.py
@@ -4,8 +4,14 @@
 """Tests for Tablib."""
 
 import unittest
+import sys
+
+if sys.version_info[0] > 2:
+    from tablib.packages import markup3 as markup
+else:
+    from tablib.packages import markup
+
 
-from tablib.packages import markup
 
 import tablib
 
@@ -295,6 +301,21 @@ class TablibTestCase(unittest.TestCase):
 
         self.assertEqual(_csv, data.csv)
 
+
+    def test_csv_import_set_with_spaces(self):
+        """Generate and import CSV set serialization when row values have
+        spaces."""
+        data.append(('Bill Gates', 'Microsoft'))
+        data.append(('Steve Jobs', 'Apple'))
+        data.headers = ('Name', 'Company')
+
+        _csv = data.csv
+
+        data.csv = _csv
+
+        self.assertEqual(_csv, data.csv)
+
+
     def test_tsv_import_set(self):
         """Generate and import TSV set serialization."""
         data.append(self.john)
@@ -307,6 +328,7 @@ class TablibTestCase(unittest.TestCase):
 
         self.assertEqual(_tsv, data.tsv)
 
+
     def test_csv_format_detect(self):
         """Test CSV format detection."""
 
@@ -322,6 +344,7 @@ class TablibTestCase(unittest.TestCase):
         self.assertTrue(tablib.formats.csv.detect(_csv))
         self.assertFalse(tablib.formats.csv.detect(_bunk))
 
+
     def test_tsv_format_detect(self):
         """Test TSV format detection."""
 
@@ -337,6 +360,7 @@ class TablibTestCase(unittest.TestCase):
         self.assertTrue(tablib.formats.tsv.detect(_tsv))
         self.assertFalse(tablib.formats.tsv.detect(_bunk))
 
+
     def test_json_format_detect(self):
         """Test JSON format detection."""
 
@@ -374,6 +398,7 @@ class TablibTestCase(unittest.TestCase):
         self.assertEqual(tablib.detect(_json)[0], tablib.formats.json)
         self.assertEqual(tablib.detect(_bunk)[0], None)
 
+
     def test_transpose(self):
         """Transpose a dataset."""
 
@@ -388,6 +413,7 @@ class TablibTestCase(unittest.TestCase):
         self.assertEqual(second_row,
                    ("gpa",90, 67, 50))
 
+
     def test_row_stacking(self):
 
         """Row stacking."""
@@ -405,6 +431,7 @@ class TablibTestCase(unittest.TestCase):
             expected_data = original_data + original_data
             self.assertEqual(row_stacked[column], expected_data)
 
+
     def test_column_stacking(self):
 
         """Column stacking"""
@@ -425,6 +452,7 @@ class TablibTestCase(unittest.TestCase):
         self.assertEqual(column_stacked[0],
                    ("John", "Adams", 90, "John", "Adams", 90))
 
+
     def test_sorting(self):
 
         """Sort columns."""
@@ -442,6 +470,7 @@ class TablibTestCase(unittest.TestCase):
         self.assertEqual(second_row, expected_second)
         self.assertEqual(third_row, expected_third)
 
+
     def test_wipe(self):
         """Purge a dataset."""
 
@@ -459,5 +488,17 @@ class TablibTestCase(unittest.TestCase):
         self.assertTrue(data[0] == new_row)
 
 
+    def test_formatters(self):
+        """Confirm formatters are being triggered."""
+        
+        def _formatter(cell_value):
+            return str(cell_value).upper()
+            
+        self.founders.add_formatter('last_name', _formatter)
+        
+        for name in [r['last_name'] for r in self.founders.dict]:
+            self.assertTrue(name.isupper())
+
+
 if __name__ == '__main__':
     unittest.main()
diff --git a/tox.ini b/tox.ini
index 9cef9b3..764ee3c 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,9 +1,17 @@
 [tox]
-envlist = py24,py25,py26,py27
+envlist = py25,py26,py27,py3
 
 [testenv]
 commands=py.test --junitxml=junit-{envname}.xml
-deps = 
-    nose
-    simplejson
-    pytest
\ No newline at end of file
+deps = pytest
+    
+[testenv:py25]
+simplejson = pytest simplejson
+
+[testenv:pypy]
+basepython=/usr/bin/pypy-c
+simplejson = pytest simplejson
+
+[testenv:py3]
+basepython=/usr/bin/python3
+simplejson = pytest
\ No newline at end of file