Packaging Python modules for Python 3
I hope to add a parallel-installable Python 3 stack to Fedora 13.
See the feature page: https://fedoraproject.org/wiki/Features/Python3F13 and also this thread: https://www.redhat.com/archives/fedora-devel-list/2009-October/msg00054.html
This requires us to come up with a sane way to package Python 3 modules.
Naming
(to be written)
Layout
All .py/.pyo/.pyc files need to be below
/usr/lib/python$MAJOR-$MINOR/site-packages
for example, below:
/usr/lib/python3.1/site-packages
.pyo/.pyc files
Compiled .pyo/.pyc files embed a magic number, indicating which python version they are for; python libraries have a corresponding magic number.
Proposal rule: All .pyo/.pyc files below /usr/lib/python$MAJOR.$MINOR must have a magic number corresponding to that for /usr/bin/python$MAJOR.$MINOR
Thus e.g.
/usr/lib/python2.6/site-packages/libxml2.pyc
must have the same magic number as that of
/usr/bin/python2.6
Similarly,
/usr/lib/python3.1/site-packages/libxml2.pyc
must have the same magic number as that of
/usr/bin/python3.1