zone = {
    "内蒙":{
        "包头":["东河区","昆都仑区","青山区","九原区"],
        "呼和浩特":["新城区","回民区","玉泉区","赛罕区"],
        "鄂尔多斯":["东胜区","准格尔旗","达拉特旗","伊金霍洛旗"],
        "通辽":["科尔沁区","开鲁县","库伦旗","奈曼旗"],
        "呼伦贝尔":["海拉尔区","满洲里","扎兰屯","牙克石"]
            },
    "北京":{
        "东城区":["东华门","景山街","交道口","安定门"],
        "西城区":["长安街","什刹海","天桥","月坛"],
        "朝阳区":["三里屯","呼家楼","和平里","劲松"],
        "丰台区":["右安门","太平桥","大红门","南苑"],
        "石景山区":["八宝山","老山","古城","八角"]
            },
    "吉林":{
        "长春":["南关区","宽城区","九台区","二道区"],
        "吉林":["昌邑区","龙潭区","船营区","丰满区"],
        "四平市":["铁西区","铁东区","公主岭","双辽"],
        "辽源":["龙山区","西安区","东丰县","东辽县"],
        "通化市":["东昌区","二道江区","梅河口","通化县"]
            },
    "辽宁":{
        "沈阳":["和平区","沈河区","大东区","皇姑区"],
        "大连":["中山区","西岗区","沙河口区","金州区"],
        "鞍山":["铁西区","铁东区","立山区","千山区"],
        "抚顺":["新抚区","东洲区","望花区","抚顺县"],
        "本溪":["平山区","溪湖区","明山区","南芬区"]
            }
}
print(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>")
for province in zone:#遍历字典的key，列出省份名称
    print(province)
print("=====================================")
province_flag = True#跳出循环标签
while province_flag:
 for i in range(3):#指定循环3次，循环3次，退出
    province_input = input("请输入省份名称 ： ")
    if province_input.strip() in zone.keys():#检查输入省份名称是否在字典中
        print("城市信息 ： ")
        print("=====================================")
        for city in zone[province_input].keys():#遍历字典的key，列出城市名称
           print(city)
        print("=====================================")
        city_flag = True#跳出循环标签
        while city_flag:
            for j in range (3):#指定循环3次，循环3次，跳出循环
                city_input = input("请输入城市名称 ： ")
                if city_input.strip() in zone[province_input].keys():#检查输入城市名称是否在字典中
                    print("区县信息 ： ")
                    print("=====================================")
                    for area in zone[province_input][city_input]:#遍历字典的key，列出区县名称
                        print(area)
                    print("=====================================")
                    area_flag = True#跳出循环标签
                    while area_flag:
                        for k in range (3):#指定循环3次，循环3次，跳出循环
                            area_input = input("请输入区县名称 ： ")
                            if area_input.strip() in zone[province_input][city_input]:#检查输入城市名称是否在字典中
                                print("=====================================")
                                print("您所查询的信息 ： ",province_input,city_input,area_input)
                                print("=====================================")
                                province_flag = False#跳出循环
                                city_flag = False#跳出循环
                                exit()#跳出外循环
                            else:
                                if k!=2:
                                   print("输入区县名称有误，请重新输入。。。  还有 %d 次机会。。。"%(2-k))
                                   print("=====================================")
                                   for area in zone[province_input][city_input]:#列出区县名称，方便重新输入
                                      print(area)
                                   print("=====================================")
                                if k==2:
                                   print("输入错误三次，请重新输入城市名称。。。")
                                   print("=====================================")
                                   for city in zone[province_input].keys():#列出城市名称，方便重新输入
                                          print(city)
                                   print("=====================================")
                                area_flag = False#跳出循环
                else:
                    if j!=2:
                       print("输入城市名称有误，请重新输入。。。  还有 %d 次机会。。。"%(2-j))
                       print("=====================================")
                       for city in zone[province_input].keys():#列出城市名称，方便重新输入
                            print(city)
                       print("=====================================")
                    if j==2:
                       print("输入错误三次，请重新输入省份名称。。。")
                       print("=====================================")
                       for province in zone:#列出省份名称，方便重新输入
                          print(province)
                       print("=====================================")
                    city_flag = False

    else:
        if i!=2:
            print("输入省份名称有误，请重新输入。。。  还有 %d 次机会。。。"%(2-i))
            print("=====================================")
            for province in zone:#列出省份名称，方便重新输入
                 print(province)
            print("=====================================")
        if i==2:
            print("输入错误三次，退出。。。")
            province_flag = False

week 1--三级菜单