Method __contains__

lib/sqlalchemy/ext/associationproxy.py:1865–1869

(self, __o: object)

            return False

    def __contains__(self, __o: object) -> bool:
        for member in self.col:
            if self._get(member) == __o:
                return True
        return False

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