#!/usr/bin/env python
# -*- coding:utf-8 -*-
# Author:Andy Chen

data = http://www.mamicode.com/{
    ‘北京‘:{
        ‘海淀‘:{
            ‘五道口‘:{
                ‘soho‘:{},
                ‘网易‘:{},
                ‘google‘:{}
            },
            ‘中关村‘:{
                ‘爱奇艺‘:{},
                ‘汽车之家‘:{},
                ‘youku‘:{},
            },
            ‘上地‘:{
                ‘百度‘:{},
            },
        },
        ‘昌平‘:{
            ‘沙河‘:{
                ‘老男孩‘:{},
                ‘北航‘:{},
            },
            ‘天通苑‘:{},
            ‘回龙观‘:{},
        },
        ‘朝阳‘:{},
        ‘东城‘:{},
    },
    ‘上海‘:{
        ‘闵行‘:{
            "人民广场":{
                ‘炸鸡店‘:{}
            }
        },
        ‘闸北‘:{
            ‘火车战‘:{
                ‘携程‘:{}
            }
        },
        ‘浦东‘:{},
    },
    ‘广东‘:{
        ‘东莞‘:{},
        ‘广州‘:{},
        ‘深圳‘:{},
    },
}

exit_flag = False

while not exit_flag:
    for i in data:
        print(i)

    choice = raw_input("选择进入1>>>:")
    if choice in data:
        while not exit_flag:
            for i2 in data[choice]:
                print(i2)
            choice2 = raw_input("选择进入2>>>:")
            if choice2 in data[choice]:
                while not exit_flag:
                    for i3 in data[choice][choice2]:
                        print(i3)
                    choice3 = raw_input("选择进入3>>>:")
                    if choice3 in data[choice][choice2]:
                        for i4 in data[choice][choice2][choice3]:
                            print (i4)
                        choice4 = raw_input("最后一层，按b返回")
                        if choice4 == ‘b‘:
                            pass
                        elif choice4 == ‘q‘:
                            exit_flag = True
                    if choice3 == ‘b‘:
                        break
                    elif choice3 == ‘q‘:
                        exit_flag = True
            if choice2 == ‘b‘:
                break
            elif choice2 == ‘q‘:
                exit_flag = True

三级菜单