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pythongh-89828: Do not relay the __class__ attribute in GenericAlias (p…
…ythonGH-93754) list[int].__class__ returned type, and isinstance(list[int], type) returned True. It caused numerous problems in code that checks isinstance(x, type). (cherry picked from commit f9433ff) Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
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Misc/NEWS.d/next/Core and Builtins/2022-06-12-19-31-56.gh-issue-89828.bq02M7.rst
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Original file line number | Diff line number | Diff line change |
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:class:`types.GenericAlias` no longer relays the ``__class__`` attribute. | ||
For example, ``isinstance(list[int], type)`` no longer returns ``True``. |
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