python实现石头剪刀布小游戏

#coding=utf-8
import random

exit_flag = False #设置flag用于break跳出两层循环，或者自定义异常也行，try:, except。
dic = {}
dic[0] = '剪刀'
dic[1] = '石头'
dic[2] = '布'

while True:
 humanStr = input("请输入[0:剪刀 1:石头 2:布] ")
 if humanStr.isdigit() and (int(humanStr) in [0,1,2]): #如果输入的是数字，并且在0,1,2中 
 human = int(humanStr) 
 windows = random.randint(0, 2)

 print ("你出的是%s,电脑出的是%s" % (dic[human],dic[windows]))

 if (human == 0 and windows == 2) or (human == 1 and windows == 0) or (human == 2 and windows == 1):
  print("祝贺你，你赢了!")
  oncemore = input("你想再来一局吗? y(Y) or n(N) ")
 elif human == windows:
  print("平局")
  oncemore = input("你想再来一局吗? y(Y) or n(N) ")
 else:
  print("不好意思，你输了")
  oncemore = input("你想再来一局吗? y(Y) or n(N) ")

 while True:
  if oncemore == 'y' or oncemore == 'Y':
  break
  elif oncemore == 'n' or oncemore == 'N':
  exit_flag = True
  break #跳出内层循环，并且设置flag
  else:
  oncemore = input("你想再来一局吗? y(Y) or n(N) ")
 if exit_flag == True:
  break #跳出层循环，结束程序

 else:
 print ("请重新输入!")
 pass