diy2.py

class Hero:
    def __init__(self,name,HP,attack):
        self.level=1
        self.name=name
        self.HP=HP
        self.attack=attack
    def upgrade(self):
        self.level=self.level+1
        self.attack=self.attack+50
        self.HP=self.HP+100
houyi = Hero('后羿',100,200)
print(houyi.HP)
houyi.upgrade()
print('后羿的生命值为：',houyi.HP)