code: def cluster_add_slots(self, slot, *slots):
          
          slots = (slot,) + slots
          if not all(isinstance(s, int) for s in slots):
              raise TypeError("All parameters must be of type int")
          fut = self.execute(b'CLUSTER', b'ADDSLOTS', *slots)
          return wait_ok(fut)
docs: Assign new hash slots to receiving node.