code: def srandmember(self, name, number=None):
          
          with self.pipe as pipe:
              f = Future()
              res = pipe.srandmember(self.redis_key(name), number=number)
  
              def cb():
                  if number is None:
                      f.set(self.valueparse.decode(res.result))
                  else:
                      f.set([self.valueparse.decode(v) for v in res.result])
  
              pipe.on_execute(cb)
              return f
docs: Return a random member of the set.
  
          :param name: str     the name of the redis key
          :return: Future()