3.py

class Hero():
    def __init__(self,name,hp,attack,level):
        self.name=name
        self.level=level
        self.hp=hp
        self.attack=attack
yase=Hero("垭瑟",300,20,1)
houyi=Hero("后羿",250,23,1)
print(yase.hp)
def Up_level():
    yase.level=yase.level+1
    yase.hp=yase.hp+50
    yase.attack=yase.attack+4
Up_level()
print(yase.hp)