Method no_formal_self

mypy/messages.py:1552–1556

(self, name: str, item: CallableType, context: Context)

        self.fail(f'Cannot determine type of "{name}" in base class "{base}"', context)

    def no_formal_self(self, name: str, item: CallableType, context: Context) -> None:
        type = format_type(item, self.options)
        self.fail(
            f'Attribute function "{name}" with type {type} does not accept self argument', context
        )

    def incompatible_self_argument(
        self, name: str, arg: Type, sig: CallableType, is_classmethod: bool, context: Context