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Closed
Description
Bug Report
Since updating from 1.1.1 to 1.2.0 the following code does not pass anymore.
Reading thechange log I am assuming this might be related to#14882.
To Reproduce
#!/usr/bin/env python3importtypingiftyping.TYPE_CHECKING:fromtyping_extensionsimportSelfT_co=typing.TypeVar('T_co',covariant=True)classConfig(typing.Generic[T_co]):def__init__(self,value:T_co)->None:self.value=value@typing.overloaddef__get__(self,instance:None,owner:typing.Any=None)->'Self':pass@typing.overloaddef__get__(self,instance:typing.Any,owner:typing.Any=None)->T_co:passdef__get__(self,instance:typing.Any,owner:typing.Any=None)->'T_co|Self':ifinstanceisNone:returnselfreturnself.valueclassMultiConfig(Config[T_co]):def__init__(self,val:T_co)->None:super().__init__(val)self.values:'dict[object, T_co]'= {}@typing.overloaddef__get__(self,instance:None,owner:typing.Any=None)->'Self':pass@typing.overloaddef__get__(self,instance:typing.Any,owner:typing.Any=None)->T_co:passdef__get__(self,instance:typing.Any,owner:typing.Any=None)->'T_co|Self':ifinstanceisNone:returnselfreturnself.values.get(instance.config_id,self.value)
Expected Behavior
This code should pass, as it did in 1.1.1.
Actual Behavior
$ mypy --strict mwe.pymwe.py:35: error: Signature of "__get__" incompatible with supertype "Config" [override]mwe.py:35: note: Superclass:mwe.py:35: note: @overloadmwe.py:35: note: def __get__(self, instance: Any, owner: Any = ...) -> T_comwe.py:35: note: Subclass:mwe.py:35: note: @overloadmwe.py:35: note: def __get__(self, instance: None, owner: Any = ...) -> MultiConfig[T_co]mwe.py:35: note: @overloadmwe.py:35: note: def __get__(self, instance: Any, owner: Any = ...) -> T_coFound 1 error in 1 file (checked 1 source file)Your Environment
- Mypy version used: 1.2.0
- Mypy command-line flags:
--strict(but it does not make a difference) - Mypy configuration options from
mypy.ini(and other config files): none - Python version used: Python 3.10.10