python---购物车

购物车功能如下：

1. 输入收入多少，购买商品

2. 打印购物清单，根据清单选择商品；

3. 结算，打印购物清单及总金额

 1 # -*- coding:utf-8 -*-
 2 # LC
 3 
 4 goods=[[1,'iphone',5800],[2,'Mac Pro',12000],[3,'apple',30],[4,'egg',5],[5,'pig',2000]]         #商品列表
 5 salary = input('Please input your salary:')                                                       #输入薪资
 6 shopping_cart = []                                           #购物车列表
 7 shopping_money=[]                                           #消费金额列表
 8 salary=int(salary)
 9 balance=int(salary)                                         #消费余额，未开始消费等于薪资
10 shopping_total_money=0
11 while True:
12     for i in goods:                                         #打印商品清单
13         print(i)
14     select = input("Please input your select,or input 'q' to quit:")        #输入购买清单选项，按"q"退出
15     if select=="q":
16         if balance==salary:                                                         #判断是否购买了东西
17             print("Do not buy any thing")
18             break
19         else:
20             print("You have been bought below:")
21             for k in shopping_cart:
22                 print(k)
23             print("Total Comsume:",shopping_total_money)
24             break
25     else:
26         select_sequence = int(select)
27         goods_max_sequence = int(goods[-1][0])
28         if select_sequence>goods_max_sequence:                                        #如果输入序列号大于商品序列号，提示输入错误
29             print("------------Warning-------------")
30             print("Your selected is not correctly,please retry")
31             print("------------Warning-------------")
32         else:
33             goods_price = int(goods[select_sequence - 1][2])
34             if goods_price<=balance:                                                #如果余额大于购买商品的金额，则加入购物车
35                 shopping_cart.append(goods[select_sequence-1])
36                 shopping_money.append(goods_price)                              #消费金额加入消费金额列表
37                 shopping_total_money = sum(shopping_money)                      #计算商品总金额
38                 shopping_total_money=int(shopping_total_money)
39                 balance = salary - shopping_total_money                         #余额计算
40             else:
41                 print('You have not enough money!')                 #余额不足，提示购买清单
42                 for k in shopping_cart:
43                     print(k)
44                 print("Total Comsume:", shopping_total_money)
45                 break

打印列表index，序号

1 product_list = [["apple",180],["pig",1800],["rice",5],["bike",500]]
2 for item in product_list:
3     print(product_list.index(item),item)
4 
5 for index,item in enumerate(product_list):
6     print(index,item)

执行代码结果：

0 ['apple', 180]
1 ['pig', 1800]
2 ['rice', 5]
3 ['bike', 500]
0 ['apple', 180]
1 ['pig', 1800]
2 ['rice', 5]
3 ['bike', 500]