python学习之多级菜单显示城市详细信息

#!/usr/bin/env python
# -*- coding:utf-8 -*-
"""
message_dict = {
    "四川":{"广安":["武胜","岳池","邻水"],"广元":["旺苍","苍溪","广元市区"]},
    "北京":{"海淀":["中关村","五道口","上地"],"朝阳":["常营","国贸","管庄"]}
}
 
print message_dict.keys()
 
"""
#使用字典和列表村村省、市、城镇等信息
message_dict = {
    "sichuan":{
        "guangan":["wusheng","yuechi","linshui"],
        "guangyuan":["wangcang","cangxi"]
    },
    "beijing":{
        "chaoyang":["changying","guanzhuang","guomao"],
        "haidian":["zhongguancun","wudaokou","shangdi"]
    }
}
 
#打印显示所有的省份
for i in range(len(message_dict.keys())):
    new_item1 = "%s:%s" %(i+1,message_dict.keys()[i])
    print new_item1
 
#要求用户选择要查看的的省份下面有哪些市区，并保证用户输入正确的省份
provence = raw_input("plz input select province:")
while True:
    if provence not in message_dict.keys():
        print "plz input correct!!!"
        provence = raw_input("plz input select province again:")
    else:
        break
message_dict1 = message_dict[provence]
 
#显示对应省份的所有市区的信息
for j in range(len(message_dict1)):
    new_item2 = "%s:%s" %(j+1,message_dict1.keys()[j])
    print new_item2
 
 
#要求用户输入要查看的市区的有哪些城镇，并保证用户输入正确
city = raw_input("plz select city:")
while True:
    if city not in message_dict1.keys():
        print "plz input correct!!!"
        city = raw_input("plz select city again:")
    else:
        break
message_list2 = message_dict1[city]
#打印用户所要查看的市区的的所有城镇
for k in range(len(message_list2)):
    new_item3 = "%s:%s" %(k+1,message_list2[k])
    print new_item3