[issue21709] logging.__init__ assumes that __file__ is always set

[Roundup Robot]

Roundup Robot added the comment:

New changeset bec6f18dd636 by Vinay Sajip in branch '3.4':
Issue #21709: Improved implementation to cover the frozen module case.
http://hg.python.org/cpython/rev/bec6f18dd636

New changeset bd44ad77013a by Vinay Sajip in branch 'default':
Issue #21709: Merged update from 3.4.
http://hg.python.org/cpython/rev/bd44ad77013a

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<http://bugs.python.org/issue21709>
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