class Hero:
    def __init__(self,name,experience,attack):
        self.level=0
        self.name=name
        self.experience=experience
        self.attack=attack
    def upgrade(self):
        self.level+=1
        self.experience+=1
        self.attack+=2
Yase=Hero("亚瑟",0,2)
Houyi=Hero("后羿",0,1)
Yase.upgrade()
Houyi.upgrade()
print(Yase.level,Yase.attack)
print(Houyi.level,Houyi.experience)