python日常：面对对象编程基础

引言：今日学习面对对象编程基础

**一切实例都可以算为对象（object），比如小狗—>金毛（实例）；
类（class）用来创建对象dog1 = Dog()，或描述对象

面对对象：

练习

from time import sleep
class Clock(object):
    def __init__(self,hour=0,minute=0,second=0):
        self.hour = hour
        self.minute = minute
        self.second = second

    def run(self):
        self.second += 1
        if self.second == 60:
            self.second = 0
            self.minute += 1
            if self.minute == 60:
                self.minute = 0
                self.hour += 1
                if self.hour == 24:
                    self.hour = 0

    def show(self):
        return '%02d:%02d:%02d' % \
               (self.hour, self.minute, self.second)
def main():
    clock = Clock(23,59,59)
    while True:
        print(clock.show())
        sleep(1)
        clock.run()

if __name__=='__main__':
    main()

23:59:59
00:00:00
00:00:01
00:00:02
00:00:03
00:00:04
00:00:05
00:00:06
00:00:07
00:00:08

疑问

对象、方法、类的概念还是有点不清晰