python面对对象小案例

python面对对象小案例：

class   Person:
    def __init__(self,name,weight):
        #self.属性=形参
        self.name=name
        self.weight=weight

    def __str__(self):
        return '我的名字叫做：%s，体重是：%.2f公斤'% (self.name,self.weight)

    def run(self):
        print(f'{self.name}，爱跑步，此时的体重：{self.weight-0.5}公斤')
        self.weight -= 0.5
        pass

    def eat(self):
        print(f'{self.name}，爱吃饭，此时的体重：{self.weight+1}公斤')
        self.weight += 1
        pass

xiaoming=Person('小明',75.0)
while True:
    run_eat=input('请输入您需要的操作:')
    if run_eat=='跑步':
        xiaoming.run()

    if  run_eat=="吃饭":
        xiaoming.eat()