Am 26.07.2011 23:20, schrieb Eldon Ziegler: > That seemed like a good idea but the .py file was complied even though > it was dated 2001-01-01 00:00:00. Python must be checking something > beside the date.
The first four bytes of a pyc file contain the magic header. It must match the magic of the current Python version. The next four bytes contain the pyc_mtime. It must match the mtime of the corresponding .py files as returned by fstat().st_mtime. If the magic doesn't match or the mtime header doesn't match the mtime of the .py file, the pyc is ignored. Hint: If you run python with the -v option, you can get information why a pyc file is ignored. $ touch test.py $ pycompile test.py $ python -v -c "import test" ... # test.pyc matches test.py import test # precompiled from test.pyc ... $ touch test.py $ python -v -c "import test" ... # test.pyc has bad mtime import test # from test.py ... Christian -- http://mail.python.org/mailman/listinfo/python-list
