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

[Alexander Belopolsky]

Alexander Belopolsky <belopolsky at users.sourceforge.net> added the comment:

Let me just add a story to show how an alternate python implementation may be useful for users.  As I was porting datetime.py to 3.x, I saw many failures from pickle tests.  It was not easy to figure out what was going on because C pickle code was calling buggy Python and pdb was unable to trace the full chain of calls.  To work around that, I added sys.modules['_pickle'] = None to my test run and there you go - the problem was found in minutes.   I am sure that someone debugging his tzinfo implementation, for example, may find datetime.py easier to work with.

The story may be a bit self-serving, but I was against this "feature" myself, but now I see enough use that I am actually working on it.

Yes, the work is in the sandbox, but I want to have py3k working version before I announce it.

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<http://bugs.python.org/issue7989>
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