Python作业2，购物车程序

 1 #Author:abu zhang
 2 
 3 import sys
 4 shop_list = [
 5     ("IphoneX",9000),
 6     ("mac book",19000),
 7     ("IphoneX",9000),
 8     ("Netbook computer",5000),
 9     ("linux python book",90),
10     ("coffee",54)
11 ]
12 shopping_cart = []
13 try:
14     salary = input("Please enter your salary:")
15     if salary.isdigit():
16         salary = int(salary)
17         while True:
18             for k, v in enumerate(shop_list):
19                 print(k, v)
20             user_input = input("Please choose the item you want to buy ,input ‘quit‘ exit:")
21 
22             if user_input.isdigit():
23                 user_input = int(user_input)
24                 if user_input < len(shop_list) and user_input >= 0:
25                         p_item = shop_list[user_input]
26                         if salary > p_item[1]:
27                             shopping_cart.append(p_item)
28                             salary = salary - p_item[1]
29                             print("you have purchased \033[31;1m%s\033[0m; shopping,amount remaining \033[31;1m%s\033[0m"%(p_item[0],salary))
30                         else:
31                             print("您的余额不足矣购买该商品。")
32                 else:
33                     print("\033[31;1m找不到您想要购买的商品，请重新输入\033[0m")
34             elif user_input == "quit":
35                 print("欢迎下次光临！")
36                 print("您已购买了如下商品:")
37                 print("\t\t------shop list-----")
38                 for i in shopping_cart:
39                     print("\t\t",i)
40                 break
41 finally:
42     print("Input Error")