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Generalise attribute __func__ of class MethodType from FunctionType to Callable #11201

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Jan 31, 2024
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Generalise attribute __func__ of class MethodType from FunctionType to Callable #11201

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14 changes: 1 addition & 13 deletions stdlib/types.pyi
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Original file line number Diff line number Diff line change
Expand Up @@ -418,26 +418,14 @@ class CoroutineType(Coroutine[_YieldT_co, _SendT_contra, _ReturnT_co]):
@overload
def throw(self, __typ: BaseException, __val: None = None, __tb: TracebackType | None = ...) -> _YieldT_co: ...

class _StaticFunctionType:
# Fictional type to correct the type of MethodType.__func__.
# FunctionType is a descriptor, so mypy follows the descriptor protocol and
# converts MethodType.__func__ back to MethodType (the return type of
# FunctionType.__get__). But this is actually a special case; MethodType is
# implemented in C and its attribute access doesn't go through
# __getattribute__.
# By wrapping FunctionType in _StaticFunctionType, we get the right result;
# similar to wrapping a function in staticmethod() at runtime to prevent it
# being bound as a method.
def __get__(self, obj: object, type: type | None) -> FunctionType: ...

@final
class MethodType:
@property
def __closure__(self) -> tuple[_Cell, ...] | None: ... # inherited from the added function
@property
def __defaults__(self) -> tuple[Any, ...] | None: ... # inherited from the added function
@property
def __func__(self) -> _StaticFunctionType: ...
def __func__(self) -> Callable[..., Any]: ...
@property
def __self__(self) -> object: ...
@property
Expand Down