1 salary = 5000
2
3 product_list = [
4 ('mac',9000),('kindle',800),('tesla',900000),('python book',105),('bike',2000),
5
6 ]
7 shopping_car = []
8 saving = input('please input your money:')
9 if saving.isdigit(): #校验是否是数字
10 saving = int(saving)
11 while True:
12 for i,v in enumerate(product_list,1): #给商品加编号
13 # print(product_list.index(i)+1,i)
14 print(i,'>>>',v)
15 choice = input('选择购买商品编号[退出:q]:')
16 if choice.isdigit():
17 choice=int(choice)
18 if choice>0 and choice<len(product_list):
19
20 p_item = product_list[choice-1]
21 if p_item[1]<saving:
22 saving -= p_item[1]
23 shopping_car.append(p_item)
24
25 else:
26 print('余额不足,还剩%s' %saving)
27
28
29 print(p_item)
30 else:
31 print('编码不存在')
32
33 elif choice == 'q':
34 print('------您已经购买如下商品------')
35 for n in shopping_car:
36 print(n)
37
38 print('您还剩%s元'%saving)
39
40 break
41 else:
42 print('invalid input')
