code: def at(self, hour, minute=0, second=0, microsecond=0):
          
          return self.set(
              hour=hour, minute=minute, second=second, microsecond=microsecond
          )
docs: Returns a new instance with the current time to a different time.
  
          :param hour: The hour
          :type hour: int
  
          :param minute: The minute
          :type minute: int
  
          :param second: The second
          :type second: int
  
          :param microsecond: The microsecond
          :type microsecond: int
  
          :rtype: DateTime