用python编写购物程序(2)

 1 #!/usr/bin/env python
 2 # -*- coding:utf-8 -*-
 3 # Author:James Tao
 4 
 5 list_of_goods=[
 6     [‘iphone‘,5800],
 7     [‘Mac Pro‘,12000],
 8     [‘Bike‘,800],
 9     [‘Watch‘,2000],
10     [‘Coffee‘,31],
11     [‘Book‘,120]
12 ]
13 list_of_bought=[]
14 dict_of_bought={}
15 salary=input(‘请输入您的工资:‘)
16 if salary.isdigit():#判断是否是整数
17     salary=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=input(‘选择购买商品编号:‘)
25 
26         #判断输入是否合法
27         if choice_of_user.isdigit():
28             choice_of_user=int(choice_of_user)
29 
30             #判断编号是否有对应商品
31             if 0<=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]<=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`
40                     salary-=list_of_goods[choice_of_user][1]
41 
42                     print(‘‘‘添加{boughtgood}到您的购物车,此刻您的余额为{balance}.
43                     ‘‘‘.format(boughtgood=list_of_goods[choice_of_user][0],balance=salary))
44                 else:
45                     print(‘您的余额不足,此实余额为%s,不够购买此商品‘,salary)
46             else:
47                 print(‘商品不存在‘)
48 
49         elif choice_of_user==‘q‘:
50 
51             #统计购买的商品及数量
52             category_of_bought=set(list_of_bought)
53             for item in category_of_bought:
54                 dict_of_bought[item]=list_of_bought.count(item)
55             print(‘您购买的商品及数量分别为‘,dict_of_bought)
56 
57             print(‘您的余额为:‘,salary)
58             exit()
59         else:
60             print(‘输入不合法‘)
61 else:
62     print(‘输入不合法‘)