day3-购物车小程序

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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：

 #Author:Daniel
 # -*- coding: utf-8 -*-
 #time:2017.10.26-10:10
 Commodity = [
     ('IPhone',6800),
     ('Samsung',7000),
     ('Huwei',10000),
     ('Mi',11000),
     ('vivo',12000),
     ('NOKIA',15000),
 ]
 shopping_cart = []
 salary = input('Please enter your salary:')
 if salary.isdigit():
     salary = int(salary)
     while True:
         for index,Commodity_list in enumerate(Commodity):
             print(index,Commodity_list)
         user_choice = input('Please enter the commodity number')
         if user_choice.isdigit():
             user_choice = int(user_choice)
             if user_choice < len(Commodity) and user_choice >= 0:
                 Phone = Commodity[user_choice]
                 if Phone[1] <= salary:
                     shopping_cart.append(Phone)
                     salary -= Phone[1]
                     print('\033[31mThe %s has joined the shopping cart.Your balance is left %s\033[0m' % (Phone,salary))
                 else:
                     print('Your balance is left %s Unable to buy' % salary)
             else:
                 print('The input commodity number does not.Please re-enter')
         elif user_choice == 'quit':
             print('------------------- shopping list -------------------')
             for shopping_cart_list in shopping_cart:
                 print(shopping_cart_list)
             exit()
         else:
             print('Input error,Please re-enter')
 else:
     print('The input error program has exited. Please re-enter it')

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