[issue23591] Add IntFlags

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

Why have you rejected this issue Ethan? I think this is useful feature and must be in Python, and other core developers agreed with this. Only minor implementation details are discussable.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue23591>
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