code: def zcount(self, name, min, max):
          
          with self.pipe as pipe:
              return pipe.zcount(self.redis_key(name), min, max)
docs: Returns the number of elements in the sorted set at key ``name`` with
          a score between ``min`` and ``max``.
  
          :param name: str
          :param min: float
          :param max: float
          :return: Future()