#coding=utf-8
 import sys
 China_map={
     '华北':{'北京':['东城','西城','朝阳','海淀'],'河北':['保定','邯郸','唐山','海淀']},
     '华东':{'上海':['虹桥','徐汇','黄埔','普陀'],'江苏':['南京','苏州','无锡','徐州']},
     '华南':{'广东':['深圳','东莞','湛江','佛山'],'海南':['海口','三亚','三沙']}
 }
 city_district_info={'东城':[1000,2000],'西城':[1001,2001],'朝阳':[1002,2002],'海淀':[1003,2003],'保定':[1004,2004],'邯郸':[1005,2005],
                     '唐山':[1006,2006],'海淀':[1007,2007],'虹桥':[1008,2008],'徐汇':[1009,2009],'黄埔':[1010,2010],'黄埔':[1011,2011],'南京':[1012,2012],'苏州':[1013,2013],
                     '无锡':[1014,2014],'徐州':[1015,2015],'深圳':[1016,2016],'东莞':[1017,2017],'湛江':[1018,2018],'佛山':[1019,2019],'海口':[1020,2020],
                     '三亚':[1021,2021],'三沙':[1022,2022]}

 #遍历一级菜单
 def one_level_menu():
     error_num=1
     one_level_menu_dict={}
     #print('一级菜单列表：',list(China_map.keys()))

     for i in range(len(list(China_map.keys()))):
         one_level_menu_dict[i]=list(China_map.keys())[i]
     print ('一级菜单dict：',one_level_menu_dict)

     while 1:
         one_menu_choose=input('请选择Region代号；q:退出系统，b:返回上级菜单')
         if one_menu_choose == 'b':
             print('最顶层菜单，无法返回')
         elif one_menu_choose == 'q':
             sys.exit()
         elif one_menu_choose in (str(list(one_level_menu_dict.keys()))):  #list(one_level_menu_dict.keys())取出one_level_menu_dict字典中的所有的key值形成列表
             error_num=1  #输入错误后，如果再输入正确，那么错误数重新计算
             two_level_menu(one_level_menu_dict,one_menu_choose)  #调用二级菜单函数，显示二级菜单
         elif one_menu_choose not in (str(list(one_level_menu_dict.keys()))):
             print('Region代码输入错误，重新输入,第%d次错误' %error_num)
             if error_num < 3:
                 error_num=error_num+1
             else:
                 sys.exit()

 #显示二级菜单
 def two_level_menu(one_level_menu_dict,one_menu_choose):
     error_num=1
     two_level_menu_dict={}
     Region_name=one_level_menu_dict[int(one_menu_choose)]  #区域名字
     print ('选择的区域的名字：',Region_name)
     #print ('二级菜单list：',list(China_map[Region_name].keys()))

     for i in range(len(list(China_map[Region_name].keys()))):
         two_level_menu_dict[i]=list(China_map[Region_name].keys())[i]
     print ('二级菜单dict:',two_level_menu_dict)

     while 1:
         two_menu_choose=input('请选择Province代号；q:退出系统，b:返回上级菜单')
         if two_menu_choose == 'b':  #输入b，退回上级菜单
             #print('bbbb')
             one_level_menu()
         elif two_menu_choose == 'q':  #输入q，退出程序
             sys.exit()
         elif two_menu_choose in (str(list(two_level_menu_dict.keys()))):  #list(one_level_menu_dict.keys())取出one_level_menu_dict字典中的所有的key值形成列表
             error_num=1  #输入错误后，如果再输入正确，那么错误数重新计算
             three_level_menu(one_level_menu_dict,two_level_menu_dict,Region_name,one_menu_choose,two_menu_choose)  #调用三级菜单函数，显示三级菜单
         elif two_menu_choose not in (str(list(two_level_menu_dict.keys()))):
             print('Province代码输入错误，重新输入,第%d次错误' %error_num)
             if error_num < 3:
                 error_num=error_num+1
             else:
                 sys.exit()

 #显示三级菜单
 def three_level_menu(one_level_menu_dict,two_level_menu_dict,Region_name,one_menu_choose,two_menu_choose):
     error_num=1
     three_level_menu_dict={}
     Province_name=two_level_menu_dict[int(two_menu_choose)]  #城市名字
     print ('选择的省的名字：',Province_name)
     #print ('三级菜单list：',list(China_map[Region_name][City_name]))

     for i in range(len(list(China_map[Region_name][Province_name]))):
         three_level_menu_dict[i]=list(China_map[Region_name][Province_name])[i]
     print ('三级菜单dict:',three_level_menu_dict)

     while 1:
         three_menu_choose=input('请选择City-District代号；q:退出系统，b:返回上级菜单')
         if three_menu_choose == 'b':
             two_level_menu(one_level_menu_dict,one_menu_choose)
         elif three_menu_choose == 'q':
             sys.exit()
         elif three_menu_choose in (str(list(three_level_menu_dict.keys()))):
             display_city_distrct_info(one_level_menu_dict,two_level_menu_dict,three_level_menu_dict,Region_name,one_menu_choose,two_menu_choose,city_district_info)
         elif three_menu_choose not in (str(list(three_level_menu_dict.keys()))):
             print('City-District代码输入错误，重新输入,第%d次错误' %error_num)
             if error_num < 3:
                 error_num=error_num+1
             else:
                 sys.exit()

 def display_city_distrct_info(one_level_menu_dict,two_level_menu_dict,three_level_menu_dict,Region_name,one_menu_choose,two_menu_choose,city_district_info):
     error_num=1
     print('美丽的%s欢迎你' %three_level_menu_dict[int(two_menu_choose)])
     city_district_name=three_level_menu_dict[int(two_menu_choose)]
     total_population=city_district_info[three_level_menu_dict[int(two_menu_choose)]][0]
     area=city_district_info[three_level_menu_dict[int(two_menu_choose)]][1]
     msg='''%s简介信息：
 -----------------------
   总人口:%s
   总面积:%d
 ----------End----------''' %(city_district_name,total_population,area)
     print(msg)

     last_menu_choose=input('请选择代号：q:退出系统，b:返回上级菜单')
     if last_menu_choose ==  'q':
         sys.exit()
     elif last_menu_choose == 'b':
         three_level_menu(one_level_menu_dict,two_level_menu_dict,Region_name,one_menu_choose,two_menu_choose)
     else:
         last_again_menu_choose=input('代号输入错误，请选重新输入：q:退出系统，b:返回上级菜单')

 if __name__=='__main__':
     one_level_menu()