猜拳游戏。。。

import random
r = input("请猜拳：")
r2  = random.choice(['剪刀','石头','布'])
while(r != '0'):
    if   r == '剪刀' and r2 == '布':
        print(f"你赢了，系统出的是{r2}")
    elif r == '剪刀' and r2 == '石头':
        print(f"你输了，系统出的是{r2}")
    elif r == '剪刀' and r2 == '剪刀':
        print(f"平局，系统出的是{r2}")
    elif r == '石头' and r2 == '布':
        print(f"你输了，系统出的是{r2}")
    elif r == '石头' and r2 == '石头':
        print(f"平局，系统出的是{r2}")
    elif r == '石头' and r2 == '剪刀':
        print(f"你赢了，系统出的是{r2}")
    elif r == '布' and r2 == '布':
        print(f"平局，系统出的是{r2}")
    elif r == '布' and r2 == '石头':
        print(f"你赢了，系统出的是{r2}")
    elif r == '布' and r2 == '剪刀':
        print(f"你输了，系统出的是{r2}")
    else:
        print('输入有误，重新输入')
    r = input("请猜拳：")
    r2  = random.choice(['剪刀','石头','布'])