[issue7989] Add pure Python implementation of datetime module to CPython

[Amaury Forgeot d'Arc]

Amaury Forgeot d'Arc <amauryfa at gmail.com> added the comment:

If both implementations can exist in the same interpreter, how will they cooperate?
For example, Time instances created with datetime.py won't pass PyTime_Check().

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue7989>
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