jerome.marant@free.fr (Jérôme Marant) in debian-python@lists.debian.org: > I am the python-unit maintainer (upstream program called PyUnit) > for python 1.5 and 2.0. > PyUnit has been included in Python 2.1. but I won't give it away > since it does evolve separately from Python releases. > > However, because of PYTHONPATH, the latest version of the module > will never be loaded by the interpreter. > > In 2.0 (and quite the same in 2.1), PYTHONPATH looks like: > > amboise:~$ python2 -c 'import sys; print sys.path' > ['', > '/usr/lib/python2.0', > '/usr/lib/python2.0/plat-linux2', > '/usr/lib/python2.0/lib-dynload', > '/usr/local/lib/python2.0/site-packages', > '/usr/local/lib/site-python', > '/usr/lib/python2.0/site-packages', > '/usr/lib/site-python'] > > So, if the interpreter find the module in its core modules, it > will never see that a newer version of the module was installed > in site-packages. > > Usually, packages installed separately (site-packages) from the > core python modules are more recent that the same modules of > the core, because they evolve faster than python releases. > Manual installations of modules (/usr/local) are usually done > when packages are not up-to-date, so more recent than site modules. > > This is a well known problem since python-xml (PyXML) is both > in 2.0 core and in a separate package and PyXML people have > implemented an ugly hack to work this around. > > So, I'm proposition to reorganize the PYTHONPATH like this : > > ['', > '/usr/local/lib/python2.0/site-packages', > '/usr/local/lib/site-python', > '/usr/lib/site-python' > '/usr/lib/python2.0/site-packages', > '/usr/lib/python2.0', > '/usr/lib/python2.0/plat-linux2', > '/usr/lib/python2.0/lib-dynload', > > ] > > I know that it could lead to some problems but not > that much I think. > > Thanks in advance for your comments. > > PS: it would be usefull to talk to Brendan O'Dea who chose the > same ordering for Perl packages. Will this work? If so, why is it not already done? Neil
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