code: def flush_all(self, time=0):
          
          returns = []
          for server in self.servers:
              returns.append(server.flush_all(time))
  
          return any(returns)
docs: Send a command to server flush|delete all keys.
  
          :param time: Time to wait until flush in seconds.
          :type time: int
          :return: True in case of success, False in case of failure
          :rtype: bool