# Version: python3.6
# Author: Gao
# 多級菜單：三級菜單，可依次選擇進入子菜單，列表，字典

city_dict = {
             "四川省": {
                      "成都市": ["錦江區", "青羊區", "金牛區", "武侯區", "成華區", "龍泉驛區"],
                      "攀枝花市": ["東區", "西區", "仁和區", "米易縣", "鹽邊縣"],
                      "瀘州市": ["江陽區", "納溪區", "龍馬潭區", "瀘縣", "合江縣"],
                      "德陽市": ["旌陽區", "中江縣", "羅江縣", "廣漢市", "什邡市"]
                        },
             "河北省": {
                        "石家莊市": ["長安區", "橋東區", "橋西區", "新華區", "井陘礦區"],
                        "唐山市": ["路南區", "路北區", "古冶區", "開平區", "豐南區"]
                        }
            }
city_index = [(index, key) for index, key in enumerate(city_dict)]  # 創建查詢索引，enumerate用來遍歷數據對象（這裏字典表）
city_index.append((len(city_dict), ‘退出‘))                         # 添加退出選項

while True:

    print(‘_______三級城市查詢_______‘)
    print(‘__________________________‘)
    for i in city_index:                               # for省份列表(0, ‘四川省‘), (1, ‘河北省‘), (2, ‘退出‘)
        for j in i:                                    # for (0, ‘四川省‘)、xxx、xxx
            print(j, end=‘ ‘)                          # 打印省份
        print(‘ ‘)
    province_num = input("請輸入你想查詢的省份編號:")
    province = city_index[int(province_num)][1]         # 在city_index 裏 按照輸入的省份編號進行索引
    if int(province_num) == int(len(city_dict)):        # 選擇退出執行
        print("歡迎再次登錄，再見！")
        break
    # print(province)
    #print(len(city_dict[province])
    while True:
        c_index = [(index, key) for index, key in enumerate(city_dict[province])]   # 同上原理
        c_index.append((len(c_index), ‘返回‘))
        for i in c_index:
            for j in i:
                print(j, end=‘ ‘)
            print(‘‘)
        c_num = input("請輸入你想查詢的城市編號:")
        if int(c_num) == int(len(city_dict[province])):
            break
        city = c_index[int(c_num)][1]
        county = list(enumerate(city_dict[province][city]))
        print(county)
        print(‘___________end_____________‘)

老男孩python3學習，課堂作業1.2 多級菜單查詢