docs: def lie_in_seg(dt, time_str, seg_duration):
      """
      判断datetime是否在time_str为起点的时间片内
      :param dt:
      :param time_str: eg: '11:10:21'
      :param seg_duration:
      :return:
      """
      minutes_of_day = time_util.get_minutes_of_day(dt)
      range_begin = time_util.time_str_to_minutes(time_str)
      if range_begin <= minutes_of_day < range_begin + seg_duration:
          return True
      else:
          return False