New submission from Larry:

On OSX El Capitan, Python v2.7.10 and 2.7.11 (standard installer)...

When importing urllib2 it crashes with a flat namespace error then loading 
_io.so.  Shortest test case: "python -c 'import urllib2'"

Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File 
"/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", 
line 94, in <module>
    import httplib
  File 
"/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/httplib.py", 
line 80, in <module>
    import mimetools
  File 
"/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/mimetools.py", 
line 6, in <module>
    import tempfile
  File 
"/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/tempfile.py", 
line 32, in <module>
    import io as _io
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/io.py", 
line 51, in <module>
    import _io
ImportError: 
dlopen(/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload/_io.so,
 2): Symbol not found: __PyCodecInfo_GetIncrementalDecoder
  Referenced from: 
/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload/_io.so
  Expected in: flat namespace
 in 
/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload/_io.so

This error occurs under both v2.7.10 and v2.7.11.  When I regress to 2.7.9 and 
all is well.

----------
components: IO, Library (Lib)
messages: 261278
nosy: bugbee
priority: normal
severity: normal
status: open
title: _io.so flat namespace
type: crash
versions: Python 2.7

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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue26498>
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