python烤地瓜

class diGuo:
    def __init__(self):#初始化类
        self.cooking="生"
        self.time=0
    def __str__(self):#描述对象
        return  "%d分钟地瓜已经%s"%(self.time,self.cooking)
    def cook(self,cookTime):#对象的cook方法
        self.time=cookTime+self.time
        if 0<=self.time<=3:
            self.cooking="生"
        elif 3<self.time<=5:
            self.cooking = "半生半熟"
        elif 5<self.time<=8:
            self.cooking = "熟"
        elif 8<self.time:
            self.cooking = "烤焦"
di_gua=diGuo()#创建地瓜的对象
di_gua.cook(2)#调用地瓜的cook方法
print(di_gua)

di_gua.cook(2)#调用地瓜的cook方法
print(di_gua)
di_gua.cook(2)#调用地瓜的cook方法
print(di_gua)