python 三级菜单

province_list = {
 "华南":{
  "广东":["广州市","佛山市","深圳市","东莞市"],

  "广西":["南宁市","柳州市","桂林市","北海市"],


  "海南":["海口市","三亚市","三沙市","儋州市"]

 },
 "华东":{
  "上海":["黄浦区","卢湾区","徐汇区","长宁区","普陀区"],

  "安徽":["合肥市","芜湖市","淮南市","马鞍山市"],

  "江苏":["南京市","无锡市","徐州市","常州市","苏州市"]

 },
 "华北":{
  "北京":["东城区","西城区","朝阳区","丰台区","石景山区","海淀区"],

  "山西":["太原市","大同市","阳泉市","长治市"],

  "河北":["石家庄市","唐山市","秦皇岛市","邢台市"]

 },
 "华中":{
  "湖北":["武汉市","黄石市","十堰市","十堰市"],

  "河南":["郑州市","开封市","洛阳市","平顶山市"],

  "湖南":["长沙市","株洲市","衡阳市","邵阳市"]

 },
 "西南":{
  "重庆":["万州区","涪陵区","渝中区","大渡口区"],
  "四川":["成都市","自贡市","攀枝花市","德阳市"],
  "贵州":["贵阳市","六盘水市","遵义市","安顺市"],


 },
 "特别行政区":{
  "香港":["屯门","弯仔","北角","西贡"],
  "澳门":["花地玛堂区","圣安多尼堂区","大堂区","望德堂区"],

 },


}

judge = True
while judge :
    judge1 = True
    judge2 = True
    print('省列表：')
    for i in province_list:
        print(i)

    user_input = input('请输入所显示的省名称选择查看对象，退出按Q，返回按B:')
    while judge1:
        if user_input in province_list :
            print(user_input+'省市列表：')
            for x in province_list[user_input] :
                print(x)

            user_input1 = input ('请输入所显示的市名称选择查看对象，退出按Q，返回按B:')
            while judge2:
                if user_input1 in province_list[user_input] :
                    print(user_input + '市县列表：')
                    for y in province_list[user_input][user_input1]:
                        print(y)

                    user_input2 = input('以到达最底层县级名称，没有下一级菜单，退出按Q，返回按B:')
                    if user_input2.upper() == 'Q':
                        judge1 = False
                        judge = False
                        break

                    elif user_input2.upper() == 'B':
                        print('已返回上一层菜单。')
                        break
                    else:
                        user_input2 = input('您的输入有误，以到达最底层县级名称，没有下一级菜单，退出请按Q，返回请按B！')
                elif user_input1.upper() == 'Q':
                    judge1 = False
                    judge = False
                    break
                elif user_input1.upper() == 'B':
                    print('已返回上一层菜单。')
                    judge1 = False
                    break
                else:
                    user_input1 = input('您的输入有误，请输入所显示的市名称选择查看对象，退出按Q，返回按B:')
        elif user_input.upper() == 'Q' :
            judge = False
            break
        elif user_input.upper() == 'B' :
            user_input = input('已经是最高层菜单，请输入省名进行选择，退出请按Q，返回请按B:')
        else :
            user_input = input('您的输入有误，请输入省名进行选择，退出请按Q，返回请按B:')
print('关闭程序')