Python学习，小甲鱼044魔法方法，简单定制

 

代码:

import time as t


class MyTimer():
    def __init__(self):
        self.unit = ['年','月','天','小时','分钟','秒']
        self.prompt = "未开始"
        self.lasted = []
        self.start = 0
        self.stop = 0
        
    def __str__(self):
        return self.prompt

    def __add__(self , other):
        prompt = "总共运行了："
        result = []
        for i in range(6):
            result.append(self.lasted[i] + other.lasted[i])
            if result[i]:
                prompt +=(str(result[i]) + self.unit[i])
        return prompt

    __repr__=__str__
    
    #开始计时
    def begin (self):
        self.start = t.localtime()
        self.prompt = "请先停止在进行计时"
        print ("计时开始")

    #停止计时
    def end (self):
        if not self.start:
            print("请先开始再进行计时")
        else:
            self.stop =  t.localtime()
            self._calc()
            print ("计时结束")

    #内部方法，计算运行时间
    def _calc(self):
        self.lasted = []
        self.prompt = "总共运行了"
        for i in range(6):
            self.lasted.append(self.stop[i] - self.start[i])
            if self.lasted[i] :
                self.prompt +=(str(self.lasted[i]) + self.unit[i])
        self.stop = 0
        self.start = 0


            





    

 

 

运行结果：

>>> t1 = MyTimer()
>>> t1.begin()
计时开始
>>> t1.end()
计时结束
>>> t1
总共运行了4秒
>>> t2 = MyTimer()
>>> t2.begin()
计时开始
>>> t2.end()
计时结束
>>> t2
总共运行了5秒
>>> t1 + t2
'总共运行了：9秒'