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Refactor class decorator: this enables type_check_only support for TypedDict and NamedTuple #16469

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merged 3 commits into from Nov 13, 2023

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sobolevn
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I've noticed that TypedDict and NamedTuple classes are special cased during semantic analyzisys. They had their own logic for class-level decorators. This is fine, but we need some common ground.

As a side-effect, they can now be type_check_only!

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LGTM (minor comment about a docstring below)

mypy/semanal.py Outdated
def analyze_class_decorator_common(
self, defn: ClassDef, info: TypeInfo, decorator: Expression
) -> None:
"""Common part for all class decorators.
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Suggested change
"""Common part for all class decorators.
"""Common hook for applying class decorators.

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Done! Thanks, except it is not a hook. By hooks we often mean things like self.plugin.get_customize_class_mro_hook(defn.fullname)

mypy/semanal.py Outdated Show resolved Hide resolved
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According to mypy_primer, this change doesn't affect type check results on a corpus of open source code. ✅

@sobolevn sobolevn merged commit 023eb41 into python:master Nov 13, 2023
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@Avasam
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Avasam commented Mar 14, 2024

Nice! pywin32 has some named-tuples it generates dynamically but doesn't expose. https://github.com/python/typeshed/blob/main/stubs/pywin32/win32/lib/win32gui_struct.pyi

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3 participants