用python编写购物程序

 1 #!/usr/bin/env python
 2 # -*- coding:utf-8 -*-
 3 # Author:James Tao
 4 
 5 
 6 salary=int(input(‘请输入您的工资:‘))
 7 list_of_goods=[[‘iphone‘,5800],[‘Mac Pro‘,12000],[‘Starbuck‘,31],[‘Bicycle‘,800]]
 8 balance=salary
 9 goods_of_bought=[]
10 goods_of_categorical={}
11 
12 judge=True
13 while balance>0 and judge:
14 
15     #打印出商品列表及编号
16     for i in range(len(list_of_goods)):
17         print(‘支持购买的商品有:{goods},对应编号为:{n} \n‘.format(goods=list_of_goods[i][0],n=i))
18 
19     number = int(input(‘请输入您要购买的商品编号:‘))
20     #计算余额
21     balance=balance-int(list_of_goods[number][1])
22 
23     #判断余额是否为0
24     if balance>0:
25 
26         #将购买的商品加入购物车
27         goods_of_bought.append(list_of_goods[number][0])
28         quit1=input(‘继续购买?(Y?N):‘)
29         if quit1==‘N‘:
30             judge=False
31 
32     else:
33 
34         #若余额小于0,将上一次购买的商品金额去除
35         balance = balance + int(list_of_goods[number][1])
36         quit2=input(‘余额不足,是否退出?(Y/N):‘)
37         if quit2==‘Y‘:
38             judge=False
39 
40 #判断是否购买了商品
41 if goods_of_bought: #如果列表为空等于False
42 
43     #统计购买的商品种类
44     goods_of_set=set(goods_of_bought)
45 
46     #统计购买的商品数量并输出
47     for item in goods_of_set:
48         goods_of_categorical[item]=goods_of_bought.count(item)
49     print(‘您购买的商品及数量为:‘,goods_of_categorical)
50 
51 else:
52     print(‘您未购买任何商品‘)
53 
54 print(‘余额为:‘,balance)