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