# _*_coding:utf-8_*_ # Author:len liu menu = {
      "四川省":{
          "成都市":{
              "一区":["一县","二县"],             "二区":["一一县","二二县"]         },         "自贡市":{
              "三区":["4县","4.5县"],             "四区":["6县","6.6县"]         } } ,     "浙江省":{
          "宁波市":{
              "五区":["1县","0县"],             "六区":["22县","23县"]          },         "杭州市":{
              "七区":["3县","3县"],             "八区":["4县","4县"]         }},     "广东省":{
          "珠海":{
              "九区":["5县","6县"],             "拾区":["7县","8县"]         },         "梅州":{
              "十一区":["9县","10县"],             "十二区":["11县","12县"]         }     } } print("show your province of china:\n") while True:     for i in menu:         print(i)     choice = input('pls input which province of your choice,input "q" for exit:').strip()     if choice in menu:         while True:             for c in menu[choice]:                 print(c)             choice2 = input('pls input which area of your choice or input "b" back to previous menu :').strip()             if choice2 in menu[choice]:                 while True:                     for a in menu[choice][choice2]:                         print(a)                     choice3 = input('pls input which village of your choice or input "b" back to previous menu :').strip()                     if choice3 in menu[choice][choice2]:                         for v in menu[choice][choice2][choice3]:                             print(v)                         choice4 = input('this is end of memu,input any keys back to previous menu,or input "q" exit!:').strip()                         if choice4 == 'q':                             exit()                         else:                             pass                     elif choice3 == 'b':                         break             elif choice2 == 'b':                 break     elif choice == "q":          break