code: def _final_redis_call(self, final_set, sort_options):
          
  
          conn = self.cls.get_connection()
          if sort_options is not None:
              # a sort, or values, call the SORT command on the set
              return conn.sort(final_set, **sort_options)
          else:
              # no sort, nor values, simply return the full set
              return conn.smembers(final_set)
docs: The final redis call to obtain the values to return from the "final_set"
          with some sort options.