code: def update(self, *others):
          
          return self._op_update_helper(
              tuple(others), operator.or_, 'sunionstore', update=True
          )
docs: Update the set, adding elements from all *others*.
  
          :param others: Iterables, each one as a single positional argument.
          :rtype: None
  
          .. note::
              If all *others* are :class:`Set` instances, the operation
              is performed completely in Redis. Otherwise, values are retrieved
              from Redis and the operation is performed in Python.