python小游戏（猜拳）

#！/usr/bin/python
import  random
choices = ('石头', '剪刀', '布')
computer = random.choice(choices)   #生成一个随机值
print('猜拳游戏开始.......')
print('请输入数字: ')
print('''1.石头 2.剪刀 3.布''')
while True:
    guess_num = int(input('请出拳: '))
    if guess_num not in [1,2,3]:
        print('输入错误!!!')
        continue
    guess = choices[guess_num - 1]
    print('电脑出的是%s, 你出的是%s。' % (computer, guess))
    if guess == '石头':
        if computer == '石头':
            print('平局')
        if computer == '剪刀':
            print('你赢了')
        if computer == '布':
            print('你输了')
    elif guess == '剪刀':
        if computer == '石头':
            print('你输了')
        if computer == '剪刀':
            print('平局')
        if computer == '布':
            print('你赢了')
    elif guess == '布':
        if computer == '石头':
            print('你赢了')
        if computer == '剪刀':
            print('你输了')
        if computer == '布':
            print('平局')
    else:
        print('输入错误')

效果图