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代碼：

代碼：

dic_china = {

"直轄市":{

"北京市":["東城區","西城區","崇文區","宣武區","朝陽區","海淀區","豐臺區",

"石景山區","門頭溝區","房山區","通州區","順義區","昌平區","大興區",

"懷柔區","平谷區","延慶縣","密云縣",],

},

"省":{

"浙江省":{

"杭州市":["拱墅區","上城區","下城區","江干區","西湖區","濱江區","蕭山區","余杭區","建德市","富陽市",

"臨安市","桐廬縣","淳安縣"],

"寧波市":["海曙區","江東區","江北區","北侖區","鎮海區","鄞州區","余姚市","慈溪市","奉化市","象山縣",

"寧海縣"],

"溫州市":["鹿城區","龍灣區","甌海區","瑞安市","樂清市","洞頭縣","永嘉縣","平陽縣","蒼南縣","文成縣",

"泰順縣"],

"嘉興市":["南湖區","秀洲區","海寧市","平湖市","桐鄉市","嘉善縣","海鹽縣"],

"湖州市":["吳興區","南潯區","德清縣","長興縣","安吉縣"],

"紹興市":["越城區","諸暨市","上虞市","嵊州市","紹興縣","新昌縣"],

"金華市":["婺城區","金東區","蘭溪市","義烏市","東陽市","永康市","武義縣","浦江縣","磐安縣"],

},

}

}

print('歡迎使用中國省市查詢工具'.center(30,'-'))

while True:

#---------遍歷字典china，并編號輸出城市分類信息------

for i,j in enumerate(dic_china,1):

print(i,j)

classify_num = input('請選擇想要查看的城市分類的編號[退出：q]：')

#---------判斷輸入編號是否正確----------

if classify_num.isdigit():

classify_num = int(classify_num)

if 1 <= classify_num <= len(dic_china):

#---------將客戶選擇的類別的城市信息存入新的字典中----------

province_municipality_list = list(dic_china.keys())

#---------判斷客戶是選擇額直轄市類-------

if province_municipality_list[classify_num-1] == '直轄市':

dic_municipality = dic_china[province_municipality_list[classify_num-1]]

print(''.center(50, '-'))

for i, j in enumerate(dic_municipality, 1):

print(i, j)

municipality_num = input('請選擇想要查看的直轄市的編號[返回上一級菜單：q]：')

#---------判斷輸入編號是否正確----------

if municipality_num.isdigit():

municipality_num = int(municipality_num)

if 1 <= municipality_num <= len(dic_municipality):

municipality_list = list(dic_municipality.keys())

county_list = dic_municipality[municipality_list[municipality_num-1]]

print('以下是該直轄市下所有區的信息：')

print(county_list)

elif municipality_num.upper() == 'Q':

print(''.center(50,'-'))

else:

print('輸入錯誤，請重新輸入！！')

else:

dic_province = dic_china[province_municipality_list[classify_num-1]]

print(''.center(50, '-'))

#---------遍歷字典dic_Province，并編號輸出省級城市信息---------

for i, j in enumerate(dic_province, 1):

print(i, j)

province_num = input('請選擇想要查看的省的編號[返回上一級菜單：q]：')

# ---------判斷輸入編號是否正確----------

if province_num.isdigit():

province_num = int(province_num)

if 1<= province_num <= len(dic_province):

# ---------將客戶選擇的市信息存入新的字典中----------

province_list = list(dic_province.keys())

dic_city = dic_province[province_list[province_num-1]]

print(''.center(50, '-'))

for i, j in enumerate(dic_city, 1):

print(i, j)

city_num = input('請選擇想要查看的市的編號[返回上一級菜單：q]：')

if city_num.isdigit():

city_num = int(city_num)

if 1 <= city_num <= len(dic_city):

city_list = list(dic_city.key())---------------------------->問題在這！！！！！！！！！！！！！

elif province_num.upper() == 'Q':

print(''.center(50,'-'))

else:

print('輸入錯誤，請重新輸入！！')

else:

print('輸入的編號不在城市分類的編號范圍內，請重新輸入！！')

elif classify_num.upper() == 'Q':

print('感謝您的使用！！')

else:

print('輸入錯誤，請重新輸入！！')

問題：

代碼中標紅的位置，查詢字典dic_city的key值存入city_list列表中，但是key方法無法使用，

提示:Unresolved attribute reference 'key' for class

求大神們給我解答下

與50位技術專家面對面20年技術見證，附贈技術全景圖

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