#!/usr/bin/env python3# Author:Robert# --*-- coding: utf-8 --*--data = {  "北京":{    "東城區":{      "安定門":["國子監大街","孔廟","鐘樓"],      "建國門":["Jinbaojie","長安街","西街"],      "朝陽門":["東四南大街","朝陽門內大街","孚王府"]      },    "朝陽區":{      "和平街":["勝古莊社區","櫻花社區","和平東街社區"],      "八里莊":["慈壽寺塔","定慧寺"],      "三里屯":["798藝術區","北京工人體育館"]    },    "海淀":{}  },  '山東':{    "德州":{},    "青島":{},    "濟南":{}  },  '廣東':{    "東莞":{},    "常熟":{},    "佛山":{}  }}exit_flag = Falsewhile not exit_flag:  for i in data:    print(i)  choice = input("選擇進入-->:")  if choice in data:    while not exit_flag:      for i2 in data[choice]:        print("/t",i2)      choice2 = input("選擇進入2-->:")      if choice2 in data[choice]:        while not exit_flag:          for i3 in data[choice][choice2]:            print("/t/t",i3)          choice3 = input("選擇進入3-->:")          if choice3 in data[choice][choice2]:            for i4 in data[choice][choice2][choice3]:              print("/t/t",i4)            choice4 = input("最后一層，按b返回-->:")            if choice4 == "b":              pass            elif choice4 == "q":              exit_flag = True          if choice3 == "b":            break          elif choice4 == "q":            exit_flag = True      if choice2 == "b":        break      elif choice4 == "q":        exit_flag = True