diy1.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.hp=self.hp+50
        self.attack=slef.attack+4

yase=('亚瑟',300,20)
yase.upgrade()
print(yase.hp)