python3类

class Time:#实习时间类    def __init__(self,hour,minute,second):        self.hour = hour        self.minute = minute        self.second = second    def __str__(self):#返回对象字符串 打印输出对象元素        return '%.2d:%.2d:%.2d'%(self.hour,self.minute,self.second)time = Time(15,7,2)print(time)"""15:07:02Process finished with exit code 0"""