用python编写购物程序(2)的实现步骤和代码示例

1 #!/usr/bin/env python
2 # -*- coding:utf-8 -*-
3 # Author:James Tao
4
5 list_of_goods&＃61;[
6 [&＃39;iphone&＃39;,5800],
7 [&＃39;Mac Pro&＃39;,12000],
8 [&＃39;Bike&＃39;,800],
9 [&＃39;Watch&＃39;,2000],
10 [&＃39;Coffee&＃39;,31],
11 [&＃39;Book&＃39;,120]
12 ]
13 list_of_bought&＃61;[]
14 dict_of_bought&＃61;{}
15 salary&＃61;input(&＃39;请输入您的工资:&＃39;)
16 if salary.isdigit():#判断是否是整数
17 salary&＃61;int(salary)
18 while True:
19
20 #输出商品及其编号
21 for index,item in enumerate(list_of_goods):#enumerate取出下标
22 print(index,item)
23 #print(list_of_goods.index(item),item)
24 choice_of_user&＃61;input(&＃39;选择购买商品编号:&＃39;)
25
26 #判断输入是否合法
27 if choice_of_user.isdigit():
28 choice_of_user&＃61;int(choice_of_user)
29
30 #判断编号是否有对应商品
31 if 0<&＃61;choice_of_user<len(list_of_goods):
32
33 #判断余额是否足够买此商品
34 if list_of_goods[choice_of_user][1]<&＃61;salary:
35
36 #加入购物清单
37 list_of_bought.append(list_of_goods[choice_of_user][0])
38
39 #计算余额&＃96;
40 salary-&＃61;list_of_goods[choice_of_user][1]
41
42 print(&＃39;&＃39;&＃39;添加{boughtgood}到您的购物车,此刻您的余额为{balance}.
43 &＃39;&＃39;&＃39;.format(boughtgood&＃61;list_of_goods[choice_of_user][0],balance&＃61;salary))
44 else:
45 print(&＃39;您的余额不足,此实余额为%s,不够购买此商品&＃39;,salary)
46 else:
47 print(&＃39;商品不存在&＃39;)
48
49 elif choice_of_user&＃61;&＃61;&＃39;q&＃39;:
50
51 #统计购买的商品及数量
52 category_of_bought&＃61;set(list_of_bought)
53 for item in category_of_bought:
54 dict_of_bought[item]&＃61;list_of_bought.count(item)
55 print(&＃39;您购买的商品及数量分别为&＃39;,dict_of_bought)
56
57 print(&＃39;您的余额为:&＃39;,salary)
58 exit()
59 else:
60 print(&＃39;输入不合法&＃39;)
61 else:
62 print(&＃39;输入不合法&＃39;)