Python学习-------------------三级菜单简单版

题目：

多级菜单
         1.三级菜单
         2.可依次选择进入的各子菜单
         3.所需新知识点：列表、字典

ReadMe：

             这个做循环，比较绕脑子

             点开运行即可

Mind Map：

代码：

 1 #!/usr/bin/env python
 2 #py3.5
 3 #2018.02.06
 4 #-*- Coding:utf-8 -*-
 5 # Author:Eric.Shen
 6 #多级菜单
 7 #1.三级菜单
 8 #2.可依次选择进入的各子菜单
 9 #3.所需新知识点：列表、字典
10 
11 #自己建立一个三级字典
12 menu = {
13     "衣服":{
14         "男士":["上衣","下衣","鞋包","皮带"],"女士":["上衣","裤子","裙子","鞋包"],"儿童":["上衣","下衣","鞋包"]},
15     "汽车":{
16         "精品车":["宝马","奔驰","路虎"],"二手车":["大众","本田","荣威"]},
17     "食物":{"肉":["肥肉","瘦肉","肥瘦"]}
18 }
19 
20 #将三级菜单的key赋值product_list
21 product_list = list(menu.keys())#获得一级菜单
22 while True:
23     print("菜单".center(50,"*"))
24     for line in product_list:
25         print(product_list.index(line),line)
26     print("------------------")
27     choice = input("请输入编号或者输入q退出b返回：")
28     if choice.isdigit():
29         choice = int(choice)
30         if choice >= 0 and choice < len(product_list):
31             choice_name = product_list[choice]#获得第一级Id
32             product = list(menu[choice_name].keys())#获得选择商品的下一级菜单
33             while True:
34                 print("商品".center(50,"*"))
35                 for line2 in product:#打印二级菜单
36                     print(product.index(line2),line2)
37                 print("----------------")
38                 choice_product = input("请输入编号或者输入q退出b返回：")
39                 if choice_product.isdigit():
40                     choice_product = int(choice_product)
41                     if choice_product >= 0 and choice_product < len(product_list):
42                         choice_name2 = product[choice_product]#获得第二级的Id
43                         choice_name2_list = menu[choice_name][choice_name2]#获得第二级菜单
44                         while True:
45                             print("衣物".center(50,"*"))
46                             for line3 in  choice_name2_list:
47                                 print(choice_name2_list.index(line3),line3)
48                             back_or_quit = input("返回输入b，退出输入q")
49                             if back_or_quit == "b":
50                                 break
51                             elif back_or_quit == "q":
52                                 exit()
53                             else:
54                                 print("输入错误！")
55                     else:
56                         print("输入%d不存在"%(choice_product))
57                 elif choice_product == "q":
58                     exit()
59                 elif choice_product == "b":
60                     break
61                 else:
62                     print("输入非法！")
63         else:
64             print("输入%d不存在"%(choice))
65     elif choice == "q":
66         exit()
67     elif choice == "b":
68         break
69     else:
70         print("输入非法！")
View Code

欢迎指错

posted @ 2018-02-06 17:07  ankuo  阅读(276)  评论(0)  编辑  收藏  举报