今天学习了python写购物车的程序,受益匪浅。

1、学会了打印如何列表list。

for item in product_list:

  print(item)

2、学会了一个取下标的函数。product_list.index(item)

3、学会了enumerate(a)

  a=[1,2,3]

  enumerate(a)

》》》for i in enumerate(a):print(i)

 1 # author:zfp
 2 
 3 product_list=[('Iphone',5800),
 4           ('zfp python',88),
 5           ('pen',2),
 6           ('desk',380),
 7           ('huawei mobiphone',2700)
 8           ]
 9 shopping_cart=[]
10 salary=input("Input your salary:")
11 if salary.isdigit():
12     salary=int(salary)
13     while True:
14         #for item in product_list:
15             #print(product_list.index(item),item)
16         for index,item in enumerate(product_list):
17             print(index,item)
18         user_choice=input("选择要买什么?>>>:")
19         if user_choice.isdigit():
20             user_choice=int(user_choice)
21             if user_choice<len(product_list) and user_choice>=0:
22                 p_item=product_list[user_choice]
23                 if p_item[1]<=salary:#买的起
24                     shopping_cart.append(p_item)
25                     salary-=p_item[1]
26                     print("Added %s into shopping cart,your current salary is %s"%(p_item,salary))
27                 else:
28                     print("你的余额不够哦,只有%s还买个卵呀" % salary)
29             else:
30                 print("product code [%s] is not exist!"% user_choice)
31         elif user_choice=='q':
32             print("-------shopping  list ---------")
33             for p in shopping_cart:
34                 print(p)
35             print("Your current balance:",salary)
36             exit()
37         else:
38             print("Invalid option")

 

posted @ 2020-06-02 16:55  奔腾的小河  阅读(187)  评论(0编辑  收藏  举报