Override Of Final Method

What it does

Checks for methods on subclasses that override superclass methods decorated with @final.

Why is this bad?

Decorating a method with @final declares to the type checker that it should not be overridden on any subclass.

Example

from typing import final


class A:
    @final
    def foo(self): ...


class B(A):
    def foo(self): ...  # error