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Compiled .pyo/.pyc files embed a magic number, indicating which python version they are for; python libraries have a corresponding magic number. | Compiled .pyo/.pyc files embed a magic number, indicating which python version they are for; python libraries have a corresponding magic number. | ||
'''Proposed 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. | Thus e.g. <code>/usr/lib/python2.6/site-packages/libxml2.pyc</code> must have the same magic number as that of <code>/usr/bin/python2.6</code> | ||
must have the same magic number as that of | |||
Similarly, | Similarly, <code>/usr/lib/python3.1/site-packages/libxml2.pyc</code> must have the same magic number as that of <code> /usr/bin/python3.1</code> | ||
must have the same magic number as that of | '''TODO''': write an rpmlint test for this. See initial work here: | ||
https://www.zarb.org/pipermail/rpmlint-discuss/2009-October/000775.html and here: | |||
http://dmalcolm.fedorapeople.org/rpmlint/add-tests-for-python-bytecode-files.patch | |||
Revision as of 22:10, 23 October 2009
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 outside of a python runtime package need to be below /usr/lib/python$MAJOR-$MINOR/site-packages
For example, python code for the 3.1 runtime needs to be 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.
Proposed 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
TODO: write an rpmlint test for this. See initial work here: https://www.zarb.org/pipermail/rpmlint-discuss/2009-October/000775.html and here: http://dmalcolm.fedorapeople.org/rpmlint/add-tests-for-python-bytecode-files.patch