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Title: annotationlib: namespace can be non-`dict` · Issue #132426 · python/cpython · GitHub

Open Graph Title: annotationlib: namespace can be non-`dict` · Issue #132426 · python/cpython

X Title: annotationlib: namespace can be non-`dict` · Issue #132426 · python/cpython

Description: Hello! I think the following, made so that get_annotate_function is usable in metaclasses' __new__, should check for Mapping since __prepare__ can provide any mapping (see picture from PEP3115. cpython/Lib/annotationlib.py Line 630 in a8...

Open Graph Description: Hello! I think the following, made so that get_annotate_function is usable in metaclasses' __new__, should check for Mapping since __prepare__ can provide any mapping (see picture from PEP3115. cpy...

X Description: Hello! I think the following, made so that get_annotate_function is usable in metaclasses' __new__, should check for Mapping since __prepare__ can provide any mapping (see picture from PEP3115....

Opengraph URL: https://github.com/python/cpython/issues/132426

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annotationlib: namespace can be non-dicthttps://github.com/python/cpython/issues/132426#top
3.14bugs and security fixeshttps://github.com/python/cpython/issues?q=state%3Aopen%20label%3A%223.14%22
stdlibStandard Library Python modules in the Lib/ directoryhttps://github.com/python/cpython/issues?q=state%3Aopen%20label%3A%22stdlib%22
topic-typinghttps://github.com/python/cpython/issues?q=state%3Aopen%20label%3A%22topic-typing%22
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on Apr 12, 2025https://github.com/python/cpython/issues/132426#issue-2990344359
PEP3115https://peps.python.org/pep-3115/#invoking-the-metaclass
cpython/Lib/annotationlib.pyhttps://github.com/python/cpython/blob/a81232c769a4f67ee312c5c67a2148c54c6570d0/Lib/annotationlib.py#L630
a81232chttps://github.com/python/cpython/commit/a81232c769a4f67ee312c5c67a2148c54c6570d0
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gh-132426: get_annotate_function vs. mapping namespaces #132427https://github.com/python/cpython/pull/132427
gh-132426: Add get_annotate_from_class_namespace replacing get_annotate_function #132490https://github.com/python/cpython/pull/132490
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