[issue20371] datetime.datetime.replace bypasses a subclass's __new__

[R. David Murray]

R. David Murray added the comment:

It is actually not surprising if you are familiar with the copy/pickle protocol.  Presumably that should be mentioned in the replace docs, though (assuming I'm right and that is why the behavior occurs).

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nosy: +r.david.murray

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<http://bugs.python.org/issue20371>
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