Backport PEP-696 specialisation on Python >=3.11.1 #397
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AlexWaygood
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AlexWaygood
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May 16, 2024
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| @skipIf( | ||
| sys.version_info < (3, 11, 1), | ||
| "Not yet backported for older versions of Python" | ||
| ) |
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I verified locally that these tests pass with Python 3.11.1 but not with Python 3.11.0...
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It seems like the failures are just that we're missing the defaults from __args__, which doesn't seem too bad. (It may cause problems for introspection but shouldn't usually break creation of types that are normally in annotations.) I'm fine leaving those out for now.
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Yes, the test failures "just" indicate incorrect behaviour rather than crashes
AlexWaygood
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JelleZijlstra
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May 16, 2024
This was referenced May 16, 2024
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This is a fix for #396 on Python 3.11 and Python 3.12. Unfortunately, the
__typing_prepare_subst__hook doesn't exist on Python 3.10 and lower, so I'm not sure it's possible to backport it on older versions of Python without monkeypatchingtyping._GenericAlias.__getitem__, which seems like a bad idea. So maybe we should just document that not all features of PEP-696 are guaranteed to work on Python <=3.10?