通过面向对象思 想实现人机猜数小游戏

import random
class students:
    def __init__(self):
        self.computerfist=random.randint(1,3)
    def play(self):
        if my_fist>self.computerfist:
            print("我赢了")
        elif my_fist==self.computerfist:
            print("平局")
        elif my_fist<self.computerfist:
            print("我输了")
n=0
while n<=3:
    my_fist=int(input("请输入1~3之间的数"))
    a=students()
    a.play()
    n+=1