2to3: Use absolute imports.

The new import `absolute_import` is added the `from __future__ import`
statement and The 2to3 `import` fixer is run to make the imports
compatible. There are several things that need to be dealt with to make
this work.

1) Files meant to be run as scripts run in a different environment than
files imported as part of a package, and so changes to those files need
to be skipped. The affected script files are:

    * all setup.py files
    * numpy/core/code_generators/generate_umath.py
    * numpy/core/code_generators/generate_numpy_api.py
    * numpy/core/code_generators/generate_ufunc_api.py

2) Some imported modules are not available as they are created during
the build process and consequently 2to3 is unable to handle them
correctly. Files that import those modules need a bit of extra work.
The affected files are:

    * core/__init__.py,
    * core/numeric.py,
    * core/_internal.py,
    * core/arrayprint.py,
    * core/fromnumeric.py,
    * numpy/__init__.py,
    * lib/npyio.py,
    * lib/function_base.py,
    * fft/fftpack.py,
    * random/__init__.py

Closes #3172

10 files changed, 10 insertions, 10 deletions

diff --git a/doc/sphinxext/numpydoc/comment_eater.py b/doc/sphinxext/numpydoc/comment_eater.py
index 0e205072e..74d0d4768 100644
--- a/doc/sphinxext/numpydoc/comment_eater.py
+++ b/doc/sphinxext/numpydoc/comment_eater.py
@@ -1,4 +1,4 @@
-from __future__ import division
+from __future__ import division, absolute_import
 
 import sys
 if sys.version_info[0] >= 3:
diff --git a/doc/sphinxext/numpydoc/compiler_unparse.py b/doc/sphinxext/numpydoc/compiler_unparse.py
index 56da748d1..bb76f7ea3 100644
--- a/doc/sphinxext/numpydoc/compiler_unparse.py
+++ b/doc/sphinxext/numpydoc/compiler_unparse.py
@@ -10,7 +10,7 @@
     fixme: We may want to move to using _ast trees because the compiler for
            them is about 6 times faster than compiler.compile.
 """
-from __future__ import division
+from __future__ import division, absolute_import
 
 import sys
 from compiler.ast import Const, Name, Tuple, Div, Mul, Sub, Add
diff --git a/doc/sphinxext/numpydoc/docscrape.py b/doc/sphinxext/numpydoc/docscrape.py
index 0fe259447..af76b86e5 100644
--- a/doc/sphinxext/numpydoc/docscrape.py
+++ b/doc/sphinxext/numpydoc/docscrape.py
@@ -1,7 +1,7 @@
 """Extract reference documentation from the NumPy source tree.
 
 """
-from __future__ import division
+from __future__ import division, absolute_import
 
 import sys
 import inspect
diff --git a/doc/sphinxext/numpydoc/docscrape_sphinx.py b/doc/sphinxext/numpydoc/docscrape_sphinx.py
index 14d766d84..1248253b3 100644
--- a/doc/sphinxext/numpydoc/docscrape_sphinx.py
+++ b/doc/sphinxext/numpydoc/docscrape_sphinx.py
@@ -1,4 +1,4 @@
-from __future__ import division
+from __future__ import division, absolute_import
 
 import re, inspect, textwrap, pydoc
 import sphinx
diff --git a/doc/sphinxext/numpydoc/linkcode.py b/doc/sphinxext/numpydoc/linkcode.py
index 58361e8c3..986f39384 100644
--- a/doc/sphinxext/numpydoc/linkcode.py
+++ b/doc/sphinxext/numpydoc/linkcode.py
@@ -9,7 +9,7 @@
     :license: BSD, see LICENSE for details.
 
 """
-from __future__ import division
+from __future__ import division, absolute_import
 
 import warnings
 import collections
diff --git a/doc/sphinxext/numpydoc/numpydoc.py b/doc/sphinxext/numpydoc/numpydoc.py
index 0243d23c4..d95d476ef 100644
--- a/doc/sphinxext/numpydoc/numpydoc.py
+++ b/doc/sphinxext/numpydoc/numpydoc.py
@@ -15,7 +15,7 @@ It will:
 .. [1] https://github.com/numpy/numpy/blob/master/doc/HOWTO_DOCUMENT.rst.txt
 
 """
-from __future__ import division
+from __future__ import division, absolute_import
 
 import sphinx
 import collections
diff --git a/doc/sphinxext/numpydoc/phantom_import.py b/doc/sphinxext/numpydoc/phantom_import.py
index 6308f492d..855068834 100644
--- a/doc/sphinxext/numpydoc/phantom_import.py
+++ b/doc/sphinxext/numpydoc/phantom_import.py
@@ -14,7 +14,7 @@ without needing to rebuild the documented module.
 .. [1] http://code.google.com/p/pydocweb
 
 """
-from __future__ import division
+from __future__ import division, absolute_import
 
 import imp, sys, compiler, types, os, inspect, re
 
diff --git a/doc/sphinxext/numpydoc/plot_directive.py b/doc/sphinxext/numpydoc/plot_directive.py
index 7547642a2..9e92acabb 100644
--- a/doc/sphinxext/numpydoc/plot_directive.py
+++ b/doc/sphinxext/numpydoc/plot_directive.py
@@ -74,7 +74,7 @@ TODO
   to make them appear side-by-side, or in floats.
 
 """
-from __future__ import division
+from __future__ import division, absolute_import
 
 import sys, os, glob, shutil, imp, warnings, re, textwrap, traceback
 import sphinx
diff --git a/doc/sphinxext/numpydoc/tests/test_docscrape.py b/doc/sphinxext/numpydoc/tests/test_docscrape.py
index 07ac68003..ce99754da 100644
--- a/doc/sphinxext/numpydoc/tests/test_docscrape.py
+++ b/doc/sphinxext/numpydoc/tests/test_docscrape.py
@@ -1,5 +1,5 @@
 # -*- encoding:utf-8 -*-
-from __future__ import division
+from __future__ import division, absolute_import
 
 import sys, textwrap
 
diff --git a/doc/sphinxext/numpydoc/traitsdoc.py b/doc/sphinxext/numpydoc/traitsdoc.py
index 784c4fc2f..74c226ab4 100644
--- a/doc/sphinxext/numpydoc/traitsdoc.py
+++ b/doc/sphinxext/numpydoc/traitsdoc.py
@@ -13,7 +13,7 @@ for Traits is required.
 .. [2] http://code.enthought.com/projects/traits/
 
 """
-from __future__ import division
+from __future__ import division, absolute_import
 
 import inspect
 import os