class Dog:    role = 'Dog'    def __init__(self,name,breed,attack_val):        self.name = name        self.breed = breed        self.attack_val = attack_val        self.life_val = 100    def bite(self,person):        person.life_val -= self.attack_val        print('狗%s咬人%s 人掉了%s血，还剩%s血'%(self.name,person.name,self.attack_val,person.life_val))class Person:    role = 'Person'    def __init__(self,name,sex,attack_val):        self.name = name        self.sex = sex        self.life_val = 100        self.attack_val = attack_val    def attack(self,dog):        dog.life_val -= self.attack_val        print('人%s打打狗%s 狗掉了%s血，还剩%s血'%(self.name,dog.name,self.attack_val,dog.life_val))d1 = Dog('叶薇琦','二哈',30)p1 = Person('苏灿吉','男',50)d1.bite(p1)p1.attack(d1)