Python 城市列表，,要求：用户输入河北，

Python 城市列表，,要求：用户输入河北，

要求：用户输入河北，则打印河北省下的市，用户输入市，则显示该河北省的这个市下的县

dic = {    "河北": {        "石家庄": ["鹿泉", "藁城", "元氏"],        "邯郸": ["永年", "涉县", "磁县"],    },    "北京": {        "昌平":["沙河","回龙观","龙泽"],        "海淀":["中关村","五道口","知春路"]    },    "山西": {        "太原":["清徐县","阳曲县","娄烦县"],        "大同":["大同县","天镇县","浑源县"]    }}while True:    city=input("请输入想要查看的城市：")    if city not in dic:        print("输入有误，请重新输入：")        continue    print(dic[city])    xiancheng=input("请输入想要查看的县或区：")    if xiancheng not in dic[city]:        print("输入有误，请重新输入")        continue    print(dic[city][xiancheng])    if city == "exit" or xiancheng=="exit":        exit()

Python 城市列表