三级菜单（python3.x）

            
                 1 manue_dic={
 2"西安":{
 3"长安区":{
 4"西安邮电大学":[‘图书馆‘,‘美广‘],
 5"陕西师范大学":[‘图书馆‘,‘万科‘],
 6               },
 7"高新区":{
 8"化为西研所":[‘运维工程师‘,‘java后台开发‘],
 9"阿里巴巴":[‘云计算运维工程师‘,‘测试开发工程师‘]
10        },
11"雁塔区":{
12"小寨":[‘购物商城‘,‘赛格‘],
13"老校区":[‘邮电‘,‘师大‘]
14        }
15    },
16"铜川":{
17"耀州区":{
18"耀中中学":["学生","老师"],
19"药王山":["药王庙","游客"]
20        },
21"新区":{
22"市一中":["学生","老师"],
23"阳光广场":["表演","观看表演的人"],
24        },
25"老区":{
26"局一中":["学生","老师"],
27"玉华宫":["游客","古董"]
28        }
29    },
30}
31while True:
32for i in manue_dic:
33print (i)
34     choose=input("请输入你的选择1：")
35if choose in manue_dic :
36while True:
37for j in manue_dic[choose]:
38print ("\t",j)
39             choose1=input("请输入你的选择2：")
40if choose1 in manue_dic[choose]:
41while True:
42for k in manue_dic[choose][choose1]:
43print ("\t\t",k)
44                     choose2=input("请输入你的选择3：")
45if choose2 in manue_dic[choose][choose1]:
46for l in manue_dic[choose][choose1][choose2]:
47print("\t\t\t",l )
48                         back=input("最后一层，按b返回上级菜单,按q退出：")
49if back==‘b‘:
50pass51elif back==‘q‘:
52                            exit()
53if choose2==‘b‘:
54break55elif choose2==‘q‘:
56                        exit()
57if choose1==‘b‘:
58break59elif choose1==‘q‘:
60                exit()
61if choose==‘b‘:
62break63elif choose==‘q‘:
64         exit()