I just built Python 3.2a1 into rawhide: http://koji.fedoraproject.org/koji/buildinfo?buildID=191382 so the meaning of "python3" in rawhide just jumped from Python 3.1 to Python 3.2 A new opcode (SETUP_WITH [1]) was added, to speed up the "with" statement, and this changes the bytecode format for python 3. python3's provides changes from: python(abi) = 3.1 libpython3.1.so.1.0() to python(abi) = 3.2 libpython3.2.so.1.0() So once that package hits the buildroot for rawhide, everything that builds a python3 package or subpackage will need to be rebuilt, to use the new bytecode format. Thankfully this will be a much smaller-scale rebuild than the recent 2.7 rebuilds. To liven things up a bit, the layout of how Python stores cached bytecode has changed somewhat. The full details can be seen at: http://www.python.org/dev/peps/pep-3147/ but to summarize, where before you had: foo/__init__.py foo/bar.py foo/baz.py with cached bytecode: foo/__init__.pyc foo/__init__.pyo foo/bar.pyc foo/baz.pyo foo/bar.pyc foo/baz.pyo with Python 3.2 onwards you now have a __pycache__ directory: foo/__init__.py foo/bar.py foo/baz.py foo/__pycache__/ foo/__pycache__/__init__.cpython-32.pyc foo/__pycache__/__init__.cpython-32.pyo foo/__pycache__/foo.cpython-32.pyc foo/__pycache__/foo.cpython-32.pyo foo/__pycache__/bar.cpython-32.pyc foo/__pycache__/bar.cpython-32.pyo and the files are explicitly for "CPython 3.2" (the "32" above refers to the python version, not the architecture; this threw me initially). The idea is to permit sharing of modules between multiple parallel-installable versions of Python. So you'll need to update the %files for python3 subpackages, listing something like: foo/__pycache__ to capture the directory and the bytecode files within. Hope this makes sense Dave [1] http://svn.python.org/view?view=rev&revision=73597 -- devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/devel