gh-119180: Use type descriptors to access annotations (PEP 749) #122074
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This was referenced Jul 23, 2024
carljm
approved these changes
Jul 26, 2024
| Returns the __annotate__ function or None. | ||
| """ | ||
| if isinstance(obj, type): | ||
| return _BASE_GET_ANNOTATE(obj) |
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It may be worth explaining, in a comment or docstring (here or somewhere) why we have to go to these odd lengths.
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Good point, will do that. Thanks for reviewing!
JelleZijlstra
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Jul 27, 2024
Tests from python/cpython#122074. We don't have to use the base descriptor approach here because we find the annotations directly in the `__dict__` for the class, which avoids metaclass problems.
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A third alternative to #120719 and #120816. See python/peps#3847 (comment).
This PR is on top of #119891.
📚 Documentation preview 📚: https://cpython-previews--122074.org.readthedocs.build/