print("欢迎光临")money = input("请输入您的金额：")shopping_car ={}li = [{
   "name":"手机","price":2499},      {
    "name":"电脑","price":5999},      {
    "name":"鼠标垫","price":19},      {
    "name":"游艇","price":114900}]flag = 1if money.isdigit() and int(money) >0:    money = int(money)    while flag:        for i,k in enumerate(li):            print("{}\t\t{}\t\t{}".format(i,k["name"],k["price"]))        choice = input("输入选择的商品号(输入Q或者q，退出程序):")        if choice.isdigit():            choice = int(choice)            if choice >= 0 and choice < len(li):                # print("对应商品信息："+li[choice]["name"]+li[choice]["price"])                num = int(input("请输入要购买的商品数量："))                if money > num * li[choice]["price"]:                    money -= li[choice]["price"] * num                    if li[choice]["name"] in shopping_car:                        shopping_car[li[choice]["name"]] += num                    else:                        shopping_car[li[choice]["name"]] = num                else:                    print("余额不足")                    break                print("购物车中商品有{}，您的余额是{}".format(shopping_car,money))            else:                print("输入有误，重新输入")        elif choice.upper() == 'Q':break        else:print("请输入数字！")