Type Hint for Override

New in Python 3.12.

Recipes

from typing import override

class Parent:
    def foo(self) -> int:
        return 1

    def bar(self, x: str) -> str:
        return x

class Child(Parent):
    @override
    def foo(self) -> int:
        return 2

    @override
    def baz(self) -> int:  # Type check error: no matching signature in ancestor
        return 1

More Details

References