三级菜单

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

data = {    ‘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