class Hero:
    def __init__(self,name,hp,attack):
        self.level=1
        self.name=name
        self.hp=hp
        self.attack=attack

    def shengji(self):
        self.level=self.level+1
        self.hp=self.hp+50
        self.attack=self.attack+4
yase=Hero("亚瑟",300,20)
houyi=Hero('后羿',250,23)
houyi.shengji()
print(houyi.hp)