2.实现多级菜单

Posted 2020-10-14

需求:

1.可依次选择进入各子菜单
2.在各个子菜单可以返回上一级菜单，可以退出.
3. 所需新知识点：列表，字典
流程图：

 1 # -*- coding:utf-8 -*-
 2 # Author: JACK ZHAO
 3 
 4 # 作业3：多级菜单
 5 # 三级菜单
 6 # 可依次选择进入各子菜单
 7 # 所需新知识点：列表，字典
 8 
 9 mydict = {
10             ‘广东‘: {
11                     ‘广州‘:{
12                         ‘越秀区‘:["越秀公园","中山纪念堂","镇海楼"],
13                         ‘白云区‘:["白云山","白云湖","南湖游乐园"],
14                         ‘天河区‘:["花城广场","海心沙","天河体育中心"]},
15                     ‘深圳‘:{
16                         ‘福田区‘:["莲花山","少年宫","市民之家"],
17                         ‘南山区‘:["世界之窗","锦绣中华","海上世界"],
18                         ‘盐田区‘:["大梅沙","梧桐山","东部华侨城"]
19                         }
20                      },
21             ‘湖南‘: {
22                     ‘长沙‘:{
23                          ‘芙蓉区‘:["芙蓉广场","晓园公园","马王堆汉墓"],
24                          ‘岳麓区‘:["岳麓山","橘子洲","大学城"],
25                          ‘开福区‘:["古开福寺","世界之窗","海底世界"]},
26                     ‘岳阳‘:{
27                          ‘岳阳楼区‘:["岳阳楼","岳阳楼公园","三醉亭"],
28                          ‘君山区‘:["岳阳楼","君山岛","洞庭湖"],
29                          ‘汨罗市‘:["汨罗江","玉池山","神鼎山"]
30                         }
31                      },
32             ‘浙江‘: {
33                     ‘杭州‘:{
34                        ‘上城区‘:["清河坊","鼓楼","城隍阁景区"],
35                        ‘下城区‘:["武林广场","司徒雷登故居","凤凰寺"],
36                        ‘西湖区‘:["杭州西湖景区","雷峰塔","宋城"]},
37                     ‘宁波‘:{
38                        ‘海曙区‘:["天一藏书阁","海曙楼","天封塔"],
39                        ‘江北区‘:["慈城古县城","保国寺","老外滩"],
40                        ‘北仑区‘:["太白山","九峰山","洋沙山"]
41                  }
42             },
43         }
44 
45 print("欢迎使用城市景点查询小工具".center(50,"#"))
46 while True:
47     for index,i in enumerate(mydict): #遍历字典一级菜单
48         print(index,i)
49     choice1 = input("请输入要查询省份的名称【q|退出】:")
50     if  choice1 in mydict:
51         while True:
52             for index, i in enumerate(mydict[choice1]): #二级菜单
53                 print(index, i)
54             choice2 = input("请输入要查询城市的名称【b|返回，q|退出】:")
55             if choice2 in mydict[choice1]:
56                 while True:
57                     for index,i in enumerate(mydict[choice1][choice2]): #三级菜单
58                         print(index,i)
59                     choice3 = input("请输入要查询市区的名称【b|返回，q|退出】：")
60                     if choice3 in mydict[choice1][choice2]:
61                         while True:
62                             for index, i in enumerate(mydict[choice1][choice2][choice3]): #遍历列表
63                                 print(index, i)
64                             choice4 = input("已经是最后一级菜单，【b|返回，q|退出】：")
65                             if choice4 == "q":
66                                 print("你已退出，欢迎再次光临！")
67                                 exit()
68                             elif choice4 == "b":
69                                 break
70                     elif choice3 == "q":
71                         print("你已退出，欢迎再次光临！")
72                         exit()
73                     elif choice3 == "b":
74                         break
75                     else:
76                         print("你输入的市区\\033[31m%s\\033[0m不在列表内,请重新输入." % (choice3))
77             elif choice2 == "q":
78                 print("你已退出，欢迎再次光临！")
79                 exit()
80             elif choice2 == "b":
81                 break
82             else:
83                 print("你输入的城市\\033[31m%s\\033[0m不在列表内,请重新输入." % (choice2))
84     elif choice1 == "q":
85         print("你已退出，欢迎再次光临！")
86         exit()
87     else:
88         print("你输入的省份\\033[31m%s\\033[0m不在列表内,请重新输入." % (choice1))