gh-103968: PyType_FromMetaclass: Allow metaclasses with tp_new=NULL #105386
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Yes, since it's just relaxing an overly strict check, if we can get it into beta 3 this'd be fine. |
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Thanks @encukou for the PR 🌮🎉.. I'm working now to backport this PR to: 3.12. |
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Jun 12, 2023
…NULL (pythonGH-105386) (cherry picked from commit 2b90796) Co-authored-by: Petr Viktorin <[email protected]>
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GH-105697 is a backport of this pull request to the 3.12 branch. |
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It would be safe, and useful in some cases, to allow creating types whose metaclass has
tp_new=NULL(i.e. the metaclass can't be instantiated from Python).@Yhg1s, is it OK to backport this to 3.12? (No rush, sorry for bothering you on release day.)
It relaxes a check that newly raises
DeprecationWarningin 3.12 (orTypeErrorfrom a function that's new in 3.12). It's one line inObjects/typeobject.c, the rest are tests/docs.📚 Documentation preview 📚: https://cpython-previews--105386.org.readthedocs.build/