【我们一起自学Python】-课后作业：多级菜单

__author__ = 'Administrator'
#！usr/bin/evn python
#-*-coding utf-8  -*-

contry = {
"山东":{
"济南":["历城区","历下区"],
"青岛":["市南区","市北区","黄岛区"]
},
"河南":{
"郑州":["中原区","金水区","高新区"],
"信阳":["浉河区","平桥区","息县"]
},
"河北":{
"石家庄":["新华区","桥西区","长安区"],
"保定市":["竞秀区","莲池区","满城区"]
}
}
#新增或者修改键值
contry["陕西"]={"西安":["灞桥区","长安区","鼓楼区"],"咸阳":[],"宝鸡":[]}
contry["陕西"]["宝鸡"]=["渭滨区","金台区","陈仓区"]

while True:
#列出所有的省份
for i in  contry:#取键值
print(i.center(20,"-"))

province = input("如果继续请输入你要查询的省\n如果退出请输入Q\n@@请输入：")
#列出所查询的市
if province in contry:
for j in contry[province]:
print(j)
else:
break
select = input("如果返回上一次请输入Q，\n继续请输入城市名字\n@@请输入：")
if select == "Q":
print("退出")
continue
else:
if len(contry[province][select])> 0:
for area in contry[province][select]:
print(area)
else:
print("………信息不全，请等待更新…………")
if input("是否继续查询：")=="是":
continue
else:
break