[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