计时器.py

import time as t

class Mytimer:
      def __init__(self):
            self.unit = ['年', '月', '天', '小时', '分钟', '秒']
            self.prompt = '未开始计时'
            self.lasted = [ ]
            self.begin = 0
            self.end = 0
      
      def __str__(self):
            return self.prompt

      __repr__ = __str__

      def __add__(self, other):
            prompt = '总共运行'
            result = [ ]
            for index in range(6):
                  result.append(self.lasted[index] + other.lasted[index])
                  if result[index]:
                        prompt += (str(result[index])+self.unit[index])
      
      #开始计时
      def start(self):
            self.begin = t.localtime( )
            print('计时开始')

      #停止计时
      def stop(self):
            self.end = t.localtime( )
            self._calc( )
            print('计时结束')
            
      #计算运行时间
      def _calc(self):
            self.lasted = [ ]
            self.prompt = '总共运行'
            for index in range(6):
                  self.lasted.append(self.end[index] - self.begin[index])
                  if self.lasted[index]:
                        self.prompt += (str(self.lasted[index]) + self.unit[index])