class Cat: def __init__(self, new_name): self.name = new_name def eat(self): print("%s爱吃鱼" % self.name) tom = Cat("tom") tom.eat() tom2 = Cat("tom2") tom2.eat()
class Person: def __init__(self, name, weight): self.name = name self.weight = weight def __str__(self): return '我的名字叫 %s 体重 %.2f ' % (self.name, self.weight) def run(self): print("跑步锻炼身体") self.weight -= 0.5 def eat(self): print("吃东西容易长胖") self.weight += 1 ming = Person("小明", 75.0) ming.run() ming.eat() print(ming)