[issue28869] __module__ attribute is not set correctly for a class created by direct metaclass call

[Ivan Levkivskyi]

Ivan Levkivskyi <levkivskyi at gmail.com> added the comment:

I think we can proceed with option A, but only if doesn't cause visible slow-down for creating ABCs (which is already slower that normal classes). TBH, I don't want to document A as "official" recipe (maybe however mention the problem in the `pickle` module docs).

Note that other "class factories" in stdlib (like collections.namedtuple) do almost exactly option A.

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue28869>
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