Removes ``key`` only if ``member`` is not member of any sets in the
        ``set_list``. Returns the number of removed elements (0 or 1).

def delete_if_not_in_zsets(self, key, member, set_list, client=None):
        """
        Removes ``key`` only if ``member`` is not member of any sets in the
        ``set_list``. Returns the number of removed elements (0 or 1).
        """
        return self._delete_if_not_in_zsets(
            keys=[key]+set_list,
            args=[member],
            client=client)