1 #author F
2
3 import sys
4
5 #list格式存储商品信息
6 product_list = [
7 ('Iphone', 5800),
8 ('MacPro', 10000),
9 ('Bike', 888),
10 ('Watch', 2300),
11 ('Coffee', 58),
12 ('Mouse', 158)
13 ]
14 shopping_list = []
15 salary = input("input your salary:")
16 if salary.isdigit():
17 salary = int(salary)
18 while True:
19 for index, item in enumerate(product_list):# enumerate:把下标取出
20 print(index, item)
21 user_choose = input("要买什么呢?")
22 if user_choose.isdigit():
23 user_choose = int(user_choose)
24 if 0 <= user_choose < len(product_list):
25 p_item = product_list[user_choose]
26 if p_item[1] <= salary:#买得起
27 shopping_list.append(p_item)
28 salary -= p_item[1]
29 print("Added {item} into your cart and your balance is {balance}".format(item=p_item, balance=salary))
30 else:
31 print("你的余额只剩下[%s]啦,还买个毛线啊" % salary)
32 else:
33 print("goods do not exists")
34 elif user_choose == 'q':
35 print("------shopping list------")
36 for p in shopping_list:
37 print(p)
38 print("Your current balance:", salary)
39 sys.exit() #不引入sys会报错
40 else:
41 print("invalid option")
