【python】简单定制一个定时器类(time转换精准秒)

#代码示例(原)：import time as tclass MyTimer():    def __init__(self):        self.unit = ['年', '月', '日', '小时', '分', '秒']  #单位        self.prompt = '未开始计时！'        self.lasted = []        self.begin = 0        self.end = 0        def __str__(self):        return self.prompt    __repr__ = __str__  #赋值起到相同的def定义作用    def __add__(self, other):        prompt = '总共运行了'        result = []        for index in range(6):            result.append(self.lasted[index] + other.lasted[index])            if result[index]:                prompt += (str(result[index]) + self.unit[index])        return prompt        #开始计时    def start(self):        self.begin = t.localtime()        self.prompt = '提示：请先调用 stop() 停止计时！'        print('计时开始...')        print(self.begin)  #time.struct_time()元组    #停止计时    def stop(self):        if not self.begin:            print('提示：请先调用 start() 进行计时！')        else:            self.end = t.localtime()            print(self.end)  #time.struct_time()元组            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 index in range(6):  #控制循环次数6次            self.lasted.append(self.end[index] - self.begin[index])            if self.lasted[index]:                self.prompt += (str(self.lasted[index]) + self.unit[index])        #为下一轮计时初始化类的属性变量        self.begin = 0        self.end = 0        print(self.prompt)

运行：
>>> t1 = MyTimer()
>>> t1
未开始计时！
>>> t1.start()
计时开始...
>>> t1.stop()
总共运行了4秒
计时结束...
>>> t1
总共运行了4秒
>>> t1
总共运行了4秒
>>> t1 = MyTimer()
>>> t1.stop()
提示：请先调用 start() 进行计时！
>>> t1.start()
计时开始...
>>> t2 = MyTimer()
>>> t2.start()
计时开始...
>>> t1.stop()
总共运行了1分-41秒  #[bug] 当时间有进位时，目前代码写法中直接相减得不到正确结果。
计时结束...
>>> t2.stop()
总共运行了13秒
计时结束...

【优化后】

#代码示例(优化后)：import time as t#时间系数的常量定义d_sec = 60 * 60 * 24h_sec = 60 * 60m_sec = 60s_sec = 1class MyTimer():    def __init__(self):        #self.unit = ['年', '月', '日', '小时', '分', '秒']  #单位        self.unit = ['秒', '分', '小时', '日']  #单位        self.prompt = '未开始计时！'        self.lasted = []        self.begin = 0        self.end = 0        def __str__(self):        return self.prompt    __repr__ = __str__  #赋值起到相同的def定义作用    def __add__(self, other):        prompt = '总共运行了'        result = []        for index in range(6):            result.append(self.lasted[index] + other.lasted[index])            if result[index]:                prompt += (str(result[index]) + self.unit[index])        return prompt        #开始计时    def start(self):        #精度范围：日时分秒 (月份不均故暂不做精度)        time_ss = t.localtime()        self.begin = time_ss.tm_mday * d_sec + time_ss.tm_hour * h_sec + time_ss.tm_min * m_sec + time_ss.tm_sec * s_sec        self.prompt = '提示：请先调用 stop() 停止计时！'        print('计时开始...')        print(self.begin)  #秒数    #停止计时    def stop(self):        if not self.begin:            print('提示：请先调用 start() 进行计时！')        else:            #精度范围：日时分秒 (月份不均故暂不做精度)            time_tt = t.localtime()            self.end = time_tt.tm_mday * d_sec + time_tt.tm_hour * h_sec + time_tt.tm_min * m_sec + time_tt.tm_sec * s_sec            print(self.end)  #秒数            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'        ran = 0  #控制遍历单位的进位，如从分钟进位到小时        sec_diff = self.end - self.begin        min_diff = sec_diff // 60        sec_diff %= 60        if sec_diff > 0:            self.lasted.append(sec_diff)            print('sec_diff: %d' % sec_diff)            ran = 1        hou_diff = min_diff // 60        min_diff %= 60        if min_diff > 0:            self.lasted.append(min_diff)            print('min_diff: %d' % min_diff)            ran = 2        day_diff = hou_diff // 24        hou_diff %= 24        if hou_diff > 0:            self.lasted.append(hou_diff)            print('hou_diff: %d' % hou_diff)            ran = 3        for index in range(ran):            if self.lasted[index]:                self.prompt += (str(self.lasted[index]) + self.unit[index])##        for index in range(6):  #控制循环次数6次##            self.lasted.append(self.end[index] - self.begin[index])##            if self.lasted[index]:##                self.prompt += (str(self.lasted[index]) + self.unit[index])        #为下一轮计时初始化类的属性变量        self.begin = 0        self.end = 0        print(self.prompt)

运行：
>>> t1= MyTimer()
>>> t2= MyTimer()
>>> t1.start()
计时开始...
255002
>>> t2.start()
计时开始...
255004
>>> t1.stop()
255109
sec_diff: 47
min_diff: 1
总共运行了47秒1分  #顺序暂时没调整，这个不在话下，次序问题
计时结束...
>>> t2.stop()
255111
sec_diff: 47
min_diff: 1
总共运行了47秒1分
计时结束...