code: def get_result(self, message, *, block=False, timeout=None):
          
          if timeout is None:
              timeout = DEFAULT_TIMEOUT
  
          message_key = self.build_message_key(message)
          if block:
              timeout = int(timeout / 1000)
              if timeout == 0:
                  data = self.client.rpoplpush(message_key, message_key)
              else:
                  data = self.client.brpoplpush(message_key, message_key, timeout)
  
              if data is None:
                  raise ResultTimeout(message)
  
          else:
              data = self.client.lindex(message_key, 0)
              if data is None:
                  raise ResultMissing(message)
  
          return self.encoder.decode(data)
docs: Get a result from the backend.
  
          Warning:
            Sub-second timeouts are not respected by this backend.
  
          Parameters:
            message(Message)
            block(bool): Whether or not to block until a result is set.
            timeout(int): The maximum amount of time, in ms, to wait for
              a result when block is True.  Defaults to 10 seconds.
  
          Raises:
            ResultMissing: When block is False and the result isn't set.
            ResultTimeout: When waiting for a result times out.
  
          Returns:
            object: The result.