[python] 初学python，级联菜单输出

 #Author:shijt

 china_map = {

     "河北": {

         '石家庄': ['辛集', '正定', '晋州'],

         '邯郸': ['涉县', '魏县', '磁县'],

         '衡水': ['饶阳', '安平', '深州']

     },

     "河南": {

         '郑州': ['巩义', '新郑', '登封'],

         '开封': ['兰考', '通许', '尉氏'],

         '洛阳': ['宜阳', '孟津', '新安']

     },

     "山西": {

         '太原': ['清徐', '阳曲', '古交'],

         '大同': ['左云', '大同', '广灵'],

         '晋城': ['泽州', '阳城', '泌水']

     }

 }

 exit_flag=False

 while not exit_flag:

     for i1 in china_map:

         print(i1)

     choice1=input(">>>choice1:")

     if choice1 in china_map:

         while not exit_flag:

             for i2 in china_map[choice1]:

                 print("\t"+i2)

             choice2 = input("\t>>>choice2:")

             if choice2 in china_map[choice1]:

                 while not exit_flag:

                     for i3 in china_map[choice1][choice2]:

                         print("\t\t"+i3)

                     choice3 = input("\t\t>>>choice3:")

                     if choice3 in china_map[choice1][choice2]:

                         print(choice3+"位于"+choice1+choice2)

                     elif choice3=="b":

                         break

                     elif choice3=="q":

                         exit_flag=True

             elif choice2 == "b":

                 break

             elif choice2 == "q":

                 exit_flag = True

     elif choice1 == "q":

         exit_flag = True

     else:

         print("input error")

级联菜单输出