# -*- coding: utf-8 -*-

 # @Time    : 2018-05-31 14:56

 # @Author  : 超人

 # @Email   : huxiaojiu111@gmail.com

 # @File    : 购物车小练习

 # @Software: PyCharm

 goods_list = [

     ['apple',30],

     ['car',80000],

     ['tesla',999999],

     ['computer',20000]

 ]

 shopping_car=[]

 money = input('请输入购买金额:')

 if money.isdigit():

     money=int(money)

     while True:

         for i,o in enumerate(goods_list):

             print(i,o)

         goods_id = input('请输入购买的商品序号[退出q]:')

         if goods_id.isdigit():

             goods_id=int(goods_id)

             if goods_id>=0 and goods_id<len(goods_list):

                 goods_price=goods_list[goods_id]

                 money=money-goods_price[1]

                 if money>0:

                     print(goods_price)

                     shopping_car.append(goods_price)

                 else:

                     print('余额不足')

                     break

             else:

                 print('商品编号不存在')

         elif goods_id == 'q':

             print('购买如下商品'.center(50,'-'))

             for i in shopping_car:

                 print(i)

             print('剩余%s元钱'%money)

             break

 else:

             print('请输入合法字符!')