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Bug Report
Since updating from 1.1.1 to 1.2.0 the following code does not pass anymore.
Reading the change log I am assuming this might be related to #14882.
To Reproduce
#!/usr/bin/env python3 import typing if typing.TYPE_CHECKING: from typing_extensions import Self T_co = typing.TypeVar('T_co', covariant=True) class Config(typing.Generic[T_co]): def __init__(self, value: T_co) -> None: self.value = value @typing.overload def __get__(self, instance: None, owner: typing.Any = None) -> 'Self': pass @typing.overload def __get__(self, instance: typing.Any, owner: typing.Any = None) -> T_co: pass def __get__(self, instance: typing.Any, owner: typing.Any = None) -> 'T_co|Self': if instance is None: return self return self.value class MultiConfig(Config[T_co]): def __init__(self, val: T_co) -> None: super().__init__(val) self.values: 'dict[object, T_co]' = {} @typing.overload def __get__(self, instance: None, owner: typing.Any = None) -> 'Self': pass @typing.overload def __get__(self, instance: typing.Any, owner: typing.Any = None) -> T_co: pass def __get__(self, instance: typing.Any, owner: typing.Any = None) -> 'T_co|Self': if instance is None: return self return self.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.py mwe.py:35: error: Signature of "__get__" incompatible with supertype "Config" [override] mwe.py:35: note: Superclass: mwe.py:35: note: @overload mwe.py:35: note: def __get__(self, instance: Any, owner: Any = ...) -> T_co mwe.py:35: note: Subclass: mwe.py:35: note: @overload mwe.py:35: note: def __get__(self, instance: None, owner: Any = ...) -> MultiConfig[T_co] mwe.py:35: note: @overload mwe.py:35: note: def __get__(self, instance: Any, owner: Any = ...) -> T_co Found 1 error in 1 file (checked 1 source file)
Your Environment
--strict
mypy.ini
The text was updated successfully, but these errors were encountered:
Thanks for the report! It does look related to the PR you mention.
Slightly smaller repro:
from typing_extensions import Self from typing import Any, Generic, TypeVar, overload T_co = TypeVar('T_co', covariant=True) class Config(Generic[T_co]): @overload def get(self, instance: None) -> Self: ... @overload def get(self, instance: Any) -> T_co: ... def get(self, *a, **kw): ... class MultiConfig(Config[T_co]): @overload def get(self, instance: None) -> Self: ... @overload def get(self, instance: Any) -> T_co: ... def get(self, *a, **kw): ...
Will make a fix
Sorry, something went wrong.
Fix bounded self types in override incompatibility checking
0ac2f69
Fixes python#15041 Related to python#14882 and python#14017
Fix bounded self types in override incompatibility checking (#15045)
3d9661c
Fixes #15041 Related to #14882 and #14017 (the older one is where I added the xfail test)
Successfully merging a pull request may close this issue.
Bug Report
Since updating from 1.1.1 to 1.2.0 the following code does not pass anymore.
Reading the change log I am assuming this might be related to #14882.
To Reproduce
Expected Behavior
This code should pass, as it did in 1.1.1.
Actual Behavior
Your Environment
--strict
(but it does not make a difference)mypy.ini
(and other config files): noneThe text was updated successfully, but these errors were encountered: