[issue39134] can't construct dataclass as ABC (or runtime check as data protocol)

[Guido van Rossum]

Guido van Rossum <guido at python.org> added the comment:

Thanks. Can you be specific about “modern libraries”? Please clarify your use cases.

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue39134>
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