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[Python-Dev] Why does Mac OS X python share site-packages with apple python?

Barry Scott barry at barrys-emacs.org
Sat Mar 3 16:05:08 CET 2012 
On my Mac OS X 10.7.3 System I have lots of python kits installed for developing extensions.

I'll just noticed that Python.org 2.7.2 uses the sames site-packages folder with Apple's
2.7.1.

Since extensions compiled against Apple's 2.7.1 segv when used by python.org's 2.7.2
this is at least unfortunate.

Here is the what is in sys.path for both versions. Notice /Library/Python/2.7/site-packages
is in both.

$ /usr/bin/python -c 'import sys,pprint; pprint.pprint( sys.path )'
['',
 '/usr/local/lib/wxPython-unicode-2.8.12.1/lib/python2.7/site-packages',
 '/usr/local/lib/wxPython-unicode-2.8.12.1/lib/python2.7/site-packages/wx-2.8-mac-unicode',
 '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python27.zip',
 '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7',
 '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-darwin',
 '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac',
 '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac/lib-scriptpackages',
 '/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python',
 '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-tk',
 '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-old',
 '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload',
 '/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/PyObjC',
 '/Library/Python/2.7/site-packages',
 '/usr/local/lib/wxPython-unicode-2.8.12.1/lib/python2.7']

$ /usr/local/bin/python2.7 -c 'import sys,pprint; pprint.pprint( sys.path )'
['',
 '/usr/local/lib/wxPython-unicode-2.8.12.1/lib/python2.7/site-packages',
 '/usr/local/lib/wxPython-unicode-2.8.12.1/lib/python2.7/site-packages/wx-2.8-mac-unicode',
 '/usr/local/lib/wxPython-unicode-2.8.12.1/lib/python2.7',
 '/Library/Python/2.7/site-packages',
 '/Library/Frameworks/Python.framework/Versions/2.7/lib/python27.zip',
 '/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7',
 '/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-darwin',
 '/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac',
 '/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac/lib-scriptpackages',
 '/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-tk',
 '/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-old',
 '/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload',
 '/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages']

Barry
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