[issue20308] inspect.Signature doesn't support user classes without __init__ or __new__

[Yury Selivanov]

Yury Selivanov added the comment:

Attached is a stripped down patch that special-cases classes without __init__/__new__. Not metaclasses, for that we can start a new issue.

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Added file: http://bugs.python.org/file33557/signature_plain_cls_02.patch

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue20308>
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