docs: def diffiter(self, *others):
          """ The same as :meth:difference, but returns iterator instead of #set
  
              @others: one or several #str keynames or :class:RedisSet objects
  
              -> yields members resulting from the difference between the first
                  set and all @others.
          """
          others = self._typesafe_others(others)
          for other in self._client.sdiff(self.key_prefix, *others):
              yield self._loads(other)