python 的 购物小程序

 money = input('请输入您的工资:')
 shop = [("iphone",5800),("ipod",3000),("book",210),("Archer python",80)]
 while not money.isdigit():
     print("请正确输入整数",end=':')
     money = input()
 money = int(money)
 while True:
     print("商品详情".center(50,'-'))
     for i in range(len(shop)):
         print("%d. %s $%s".center(50,' ') % (i,shop[i][0],shop[i][1]))
     print("请输入你要购买的商品序号,(退出请按'q'):",end='')
     num = input()
     while not( num == 'q' or num.isdigit() and int(num) < len(shop) and int(num) >= 0 ):
         print("请正确输入商品序号:",end='')
         num = input()
     if num == 'q':
         break
     num = int(num)
     if money >= int(shop[num][1]):
         money -= int(shop[num][1])
         print("您购买了%s 价格为%d --您还有余额为\033[31;1m$%d\033[1m" % (shop[num][0],shop[num][1],money))
     elif money <= int(shop[num][1]):
         print("您当前余额不足,剩余余额为:\033[31;1m$%d\033[1m"%(money))

shopping