python 打印三级菜单

Posted 2020-10-01

刚刚学习python，发现很多基础理论都能懂，但是要写点东西，就脑袋一片空白，后面看了网友的文章才慢慢写出来 ......

原文：http://www.cnblogs.com/pyramid1001/p/5803294.html

 1 #!/usr/bin/env python3
 2 # -*- coding: utf-8 -*-
 3 # __author__ = cjx
 4 import sys
 5 
 6 china_map = {
 7     ‘山东‘: {
 8         ‘青岛‘: [‘四方‘, ‘黄岛‘, ‘崂山‘, ‘李沧‘, ‘城阳‘],
 9         ‘济南‘: [‘历城‘, ‘槐荫‘, ‘高新‘, ‘长青‘, ‘章丘‘],
10         ‘烟台‘: [‘龙口‘, ‘莱山‘, ‘牟平‘, ‘蓬莱‘, ‘招远‘]
11     },
12     ‘江苏‘: {
13         ‘苏州‘: [‘沧浪‘, ‘相城‘, ‘平江‘, ‘吴中‘, ‘昆山‘],
14         ‘南京‘: [‘白下‘, ‘秦淮‘, ‘浦口‘, ‘栖霞‘, ‘江宁‘],
15         ‘无锡‘: [‘崇安‘, ‘南长‘, ‘北塘‘, ‘锡山‘, ‘江阴‘]
16     },
17     ‘浙江‘: {
18         ‘杭州‘: [‘西湖‘, ‘江干‘, ‘下城‘, ‘上城‘, ‘滨江‘],
19         ‘宁波‘: [‘海曙‘, ‘江东‘, ‘江北‘, ‘镇海‘, ‘余姚‘],
20         ‘温州‘: [‘鹿城‘, ‘龙湾‘, ‘乐清‘, ‘瑞安‘, ‘永嘉‘]
21     },
22     ‘安徽‘: {
23         ‘合肥‘: [‘蜀山‘, ‘庐阳‘, ‘包河‘, ‘经开‘, ‘新站‘],
24         ‘芜湖‘: [‘镜湖‘, ‘鸠江‘, ‘无为‘, ‘三山‘, ‘南陵‘],
25         ‘蚌埠‘: [‘蚌山‘, ‘龙子湖‘, ‘淮上‘, ‘怀远‘, ‘固镇‘]
26     },
27     ‘广东‘: {
28         ‘深圳‘: [‘罗湖‘, ‘福田‘, ‘南山‘, ‘宝安‘, ‘布吉‘],
29         ‘广州‘: [‘天河‘, ‘珠海‘, ‘越秀‘, ‘白云‘, ‘黄埔‘],
30         ‘东莞‘: [‘莞城‘, ‘长安‘, ‘虎门‘, ‘万江‘, ‘大朗‘]
31     }
32 }
33 
34 province_list = list(china_map.keys())
35 # print(province_list)
36 
37 while True:
38     print(‘ 省 ‘.center(50, ‘*‘))
39     for i,p in enumerate(province_list):
40         print(i+1,p)
41     # break
42     p_id = input(‘请输入要查看的省名称编号,退出请输入 q：‘)
43     if p_id.isdigit():
44         p_id = int(p_id)
45         if p_id > 0 and p_id <= len(province_list):
46             pro_name = province_list[p_id - 1]
47             city_list = list(china_map[pro_name].keys())
48             while True:
49                 print(‘ 市 ‘.center(50, ‘*‘))
50                 for i, c in enumerate(city_list):
51                     print(i+1, c)
52                 c_id = input(‘请输入你要查看的市名称编号，返回上一级请输入 b,退出请输入 q ：‘)
53                 if c_id.isdigit():
54                     c_id = int(c_id)
55                     if 0 < c_id <= len(city_list):
56                         city_name = city_list[c_id-1]
57                         town_list = china_map[pro_name][city_name]
58                         while True:
59                             print(‘ 县 ‘.center(50, ‘*‘))
60                             for i,t in enumerate(town_list):
61                                 print(i+1,t)
62                             b_or_q = input(‘已经到最后一层，返回上一级请输入 b,退出请输入 q ：‘)
63                             if b_or_q == ‘b‘:
64                                 break
65                             elif b_or_q == ‘q‘:
66                                 exit(0)
67                             else:
68                                 print(‘输入有误！‘)
69                     else:
70                         print(‘您输入的ID %d 不存在！‘ % c_id)
71                 elif c_id == ‘b‘:
72                     break
73                 elif c_id == ‘q‘:
74                     sys.exit(‘正在退出 ......‘)
75                 else:
76                     print(‘无效输入‘)
77 
78         else:
79             print(‘您输入的ID %d 不存在！‘ % p_id)
80     elif p_id == ‘q‘:
81         exit()
82     else:
83         print(‘无法识别您的输入‘)