题目：剪刀石头布
import random
punches = ['石头','剪刀','布']
computer_choice = random.choice(punches)
user_choice = input('请出拳：（石头、剪刀、布）')
while user_choice not in punches:
print('输入有误，请重新出拳')
user_choice = input()
print('----战斗过程----')
print('电脑出拳为{}'.format(computer_choice))
print('玩家出拳为{}'.format(user_choice))
print('----战斗结果----')
if computer_choice == user_choice:
print('平局')
elif punches.index(computer_choice)-punches.index(user_choice)==int(-1):
print('电脑赢')
else:
print('玩家赢')
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