Python 练习1——简易购物车

简易购物车用于了解购物车的大致原理,利用Python实现简易购物车的基本功能,即:用户将所选择的商品放入购物车中,结算时自动输出所购买商品及所剩余额。

 1 # -*- coding: UTF-8 -*- 
 2 product_list = [
 3    ('iphone',6000),
 4    ('Mac Pro',10000),
 5    ('bike',2000),
 6    ('Watch',16000),
 7    ('coffee',30),
 8    ('book',40)
 9 ]
10 shopping_list = []
11 salary = input("Input your salary:")
12 if salary.isdigit():      #isdigit判断是否是一个整数数字,若是则会返回一个真(True)
13    salary = int(salary)
14    while True:
15       '''for item in product_list:
16          print(product_list.index(item),item) 这样写也是可以的,获取下标作为产品的产品编号
17       '''
18       for index,item in enumerate(product_list):
19          print(index,item)        #打印商品列表
20       user_choice = input("what choice your buying?")
21       if user_choice.isdigit():     #选择数字类型
22          user_choice = int(user_choice)
23          if user_choice < len(product_list) and user_choice >= 0:
24             p_item = product_list[user_choice]    #通过下标取商品
25             if p_item[1] <= salary:    #商品价格小于用户余额,即能买得起
26                shopping_list.append(p_item)    
27                salary = salary - p_item[1]
28                print("Added %s into shopping cart,Your current balance is %s" %(p_item,salary))
29             else:
30                print("余额不足")
31          else:
32             print("product code [%s] is not exist!" % (user_choice))
33 
34       elif user_choice == 'q':
35          print('---------shopping list---------
36 ')
37          for p in shopping_list:
38             print(p)
39             print("Your current balance:",salary)
40             exit()
41       else:
42          print("invalid option")

 

简易购物车仅能实现静态的商品列表。

posted on 2017-07-11 17:35  慢时光丶茶会  阅读(131)  评论(0)    收藏  举报

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