Python简单的购物车小代码

 # -*- 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!')