功能要求：
v = 2000
要求用戶輸入總資產，例如：2000
顯示商品列表，讓用戶根據序號選擇商品，加入購物車
購買，如果商品總額大於總資產，提示賬戶余額不足，否則，購買成功。

 goods_i = [
      [‘電腦‘, 6500],
      [‘鼠標‘, 1200],
      [‘遊艇‘, 99],
      [‘美女‘, 998],
      [‘Bike‘, 999],
 ]

 1 #/usr/bin/env python
 2 # -*- coding:utf-8 -*-
 3 # Author:ylw
 

 4 
 5 goods_i = [
 6     [‘電腦‘, 6500],
 7     [‘鼠標‘, 1200],
 8     [‘遊艇‘, 99],
 9     [‘美女‘, 998],
10     [‘Bike‘, 999],
11 ]
12 shopping_cart = []
13 
14 salary = int (input("輸入你的工資："))
15 
16 while True:
17     for index, i in enumerate(goods_i):
18         print("%s.\t%s\t%s" % (index, i[0], i[1]))
19
 
 
20     choice = input(">>>:").strip()
21     if len(choice) == 0:
22         print(‘輸入有誤，請重新輸入！‘)
23         continue
24     if choice.isdigit():
25         choice = int(choice)
26         if choice < len(goods_i) and choice >=0:
27             goods_item = goods_i[choice] #獲取商品
28             if
 
 salary >= goods_item[1]: #買的起
29                 salary -= goods_item[1] #扣錢
30                 shopping_cart.append(goods_item)
31                 print("以購買商品%s，您的余額還剩：%s" %(goods_item[0], salary))
32                 print("商品購買完成輸入exit退出")
33 
34             else:
35                 print("對不起您的余額不足，還需", goods_item[1] - salary)
36         else:
37             print("沒有此商品，請重新輸入！")
38     elif choice == "exit":
39         total_cost = 0
40         print("您購買了以下產品：")
41         for i in shopping_cart:
42             print(i)
43             total_cost += i[1]
44 
45         print("商品總價格：",total_cost)
46         print("您當前的余額為：",salary)
47         print("歡迎下次光臨！拜拜再見，古德拜！")
48         break

購物車小程序