At 11:24 PM 4/13/2008 +0200, Gael Varoquaux wrote: >Here is how things are happening (I simplified a bit the example, because >I have a lot of things in my sys.path): > >[EMAIL PROTECTED]:~$ python -c "import sys; print sys.path" >['', '/usr/local/lib/python2.5/site-packages/configobj-4.4.0-py2.5.egg', >'/usr/lib/python2.5/site-packages', '/usr/lib/python25.zip', >'/usr/lib/python2.5', '/usr/lib/python2.5/plat-linux2', >'/usr/lib/python2.5/lib-tk', '/usr/lib/python2.5/lib-dynload', >'/usr/local/lib/python2.5/site-packages', >'/usr/lib/python2.5/site-packages', >'/usr/lib/python2.5/site-packages/wx-2.8-gtk2-unicode'] >[EMAIL PROTECTED]:~$ export PYTHONPATH="/home/varoquau/python:" >[EMAIL PROTECTED]:~$ python -c "import sys; print sys.path" >['', '/usr/local/lib/python2.5/site-packages/configobj-4.4.0-py2.5.egg', >'/usr/lib/python2.5/site-packages', '/home/varoquau/python', >'/home/varoquau', '/usr/lib/python25.zip', '/usr/lib/python2.5', >'/usr/lib/python2.5/plat-linux2', '/usr/lib/python2.5/lib-tk', >'/usr/lib/python2.5/lib-dynload', >'/usr/local/lib/python2.5/site-packages', >'/usr/lib/python2.5/site-packages', >'/usr/lib/python2.5/site-packages/wx-2.8-gtk2-unicode'] > >Notice how what I added in my PYTHONPATH (the environment variable) is >behind the egg. Well, what if I wanted to override configobj by my own >version, in "/home/varoquau/python"? I am not able to do this without >writing some Python code to monkey patch sys.path. The "$PYTHONPATH" >should always come in front of everything. Are my explanations clear this >time? > >Maybe this was not a feature, and another bug.
It's the same bug, actually. Ideally, the configobj.egg should be in front of the /usr/lib/python25.zip, but not any further forward than that. The last line of easy-install.pth is essentially too crude in its insertion method: it defaults to inserting at position zero, when it should default to a location that is either directly before the directory containing the .pth, or if that directory is the primary site-packages directory, then it should insert in a position that is after PYTHONPATH and the script directory, but before the stdlib. Now, if someone will contribute an alternative postamble for easy-install.pth that can figure all that out in a cross-platform/cross-python-version way -- and within the constraints of the limited code you can jam into a .pth file -- we can get it fixed. :) (The cross-python-version comment is a reference to the fact that the 'site' module was heavily rewritten in either 2.4 or 2.5; I forget which. So the tools available from inside a .pth file vary somewhat between Python versions.) _______________________________________________ Distutils-SIG maillist - Distutils-SIG@python.org http://mail.python.org/mailman/listinfo/distutils-sig
