Method __contains__

lib/sqlalchemy/ext/associationproxy.py:1542–1547

(self, value: object)

        del self.col[index]

    def __contains__(self, value: object) -> bool:
        for member in self.col:
            # testlib.pragma exempt:__eq__
            if self._get(member) == value:
                return True
        return False

    def __iter__(self) -> Iterator[_T]:
        """Iterate over proxied values.