day3-购物车小程序

1.要求

启动程序后，让用户输入工资，然后打印商品列表
允许用户genuine商品编号购买商品
用户选择商品后，检测余额是否够，够就直接扣款，不够就提醒还有多少
可随时退出，退出时，打印已购买商品和余额

code：

 1 #Author:Daniel
 2 # -*- coding: utf-8 -*-
 3 #time:2017.10.26-10:10
 4 Commodity = [
 5     ('IPhone',6800),
 6     ('Samsung',7000),
 7     ('Huwei',10000),
 8     ('Mi',11000),
 9     ('vivo',12000),
10     ('NOKIA',15000),
11 ]
12 shopping_cart = []
13 salary = input('Please enter your salary:')
14 if salary.isdigit():
15     salary = int(salary)
16     while True:
17         for index,Commodity_list in enumerate(Commodity):
18             print(index,Commodity_list)
19         user_choice = input('Please enter the commodity number')
20         if user_choice.isdigit():
21             user_choice = int(user_choice)
22             if user_choice < len(Commodity) and user_choice >= 0:
23                 Phone = Commodity[user_choice]
24                 if Phone[1] <= salary:
25                     shopping_cart.append(Phone)
26                     salary -= Phone[1]
27                     print('33[31mThe %s has joined the shopping cart.Your balance is left %s33[0m' % (Phone,salary))
28                 else:
29                     print('Your balance is left %s Unable to buy' % salary)
30             else:
31                 print('The input commodity number does not.Please re-enter')
32         elif user_choice == 'quit':
33             print('------------------- shopping list -------------------')
34             for shopping_cart_list in shopping_cart:
35                 print(shopping_cart_list)
36             exit()
37         else:
38             print('Input error,Please re-enter')
39 else:
40     print('The input error program has exited. Please re-enter it')

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