Python：Day05 作业

购物车：

 product_list = [['iphone6s',5800],['mac book',9800],['coffee',32],['book',80],['bike',1500]]
 shopping_cart = []
 money = input('please input your money:')

 if money.isdigit():
     money=int(money)
     while True:
         for i, v in enumerate(product_list, 1):
             print(i, v)
         product_number  = input('请输入产品编号[退出：q]：')
         if product_number.isdigit():
             product_number=int(product_number)
             if product_number>0 and product_number<6:
                 select_product = product_list[product_number-1]
                 if money >= select_product[1] :
                     money -= select_product[1]
                     shopping_cart.append(select_product)
                     print('已将%s加入购物车'%select_product[0],'您的余额为%s元钱'%money)
                 else:
                     print('余额不足,还剩%s'%money)
             else:
                 print('序号不存在！')
         elif product_number == 'q':
             print('-------------您已购买如下商品-------------------')
             for i in shopping_cart:
                 print(i)
             print('您的余额为%s元钱'%money)
             print('欢迎下次光临')
             break
         else:
             print('invaild number!')
 else:
     print('invaild input!')