#!/usr/bin/python3

__author__ = 'beimenchuixue'

__blog__ = 'http://www.cnblogs.com/2bjiujiu/'

def menu(message):

    print('按q返回上一层')

    print('按e退出')

    ec = 'q'                                    # 返回上一级

    ex = 'e'

    for i in message:                              # 打印一级菜单

        print(i)

    while True:                                 # 进入一级菜单选择

        choice1 = input('请输入1>>>：')

        if choice1 in message:                     # 判断是否在字典中

            for i1 in message[choice1]:

                print(i1)                       # 打印值

            while True:

                choice2 = input('请输入2>>>：')  # 进入二级菜单选择

                if choice2 in message[choice1]:

                    for i2 in message[choice1][choice2]:

                        print(i2)

                    while True:

                        choice3 = input('请输入3>>>：')     # 进入三级菜单选择

                        if choice3 in message[choice1][choice2]:

                            for i3 in message[choice1][choice2][choice3]:

                                print(i3)

                        elif choice3 == ec:                 # 返回判断

                            for i2 in message[choice1]:

                                print(i2)                   # 打印上一级菜单

                            break

                        elif choice3 == ex:                 # 退出判断

                             exit('退出中……ing')

                        else:

                            print('输入错误，请重新输入，么么哒')

                elif choice2 == ec:                         # 返回判断，并打印上一级菜单

                    for i1 in message:

                        print(i1)

                    break

                elif choice2 == ex:                         # 退出判断

                    exit('退出中……ing')

                else:

                    print('输入错误，请重新输入，么么哒')

        elif choice1 == ec:                                 # 返回判断

            print('已经最顶级菜单，完全退出请输入 e ')

            continue

        elif choice1 == ex:                                 # 退出判断

            exit('退出中……ing')

        else:

            print('输入错误，请重新输入，么么哒')

if __name__ == '__main__':

    message = {'湖南':

                {'衡阳':

                     {'珠晖区': '湖南工学院'},

                 '湘潭':

                     {'晖晖': '啦啦'}},

            '北京':

                {'朝阳':

                     {"德玛：北京大学"}}}

    menu(message)

#!/usr/bin/python3

def menu_to(message):

    '''打印菜单'''

    try:

        message.endswith('end')

    except:

        for i in message:

            print(i)

    else:

        print(message.replace('end', ''))

def get_message_key(message_info):

    '''获得每层字典的单边值'''

    try:

        keys = []

        for i in message_info:

            message_info[i]

            keys.append(i)

        return keys

    except:

        return message_info + 'end'

def menu_go(message_info):

    '''进入主菜单'''

    while True:

        try:

            judgment(message_info)

        except Exception as e:

            print(e)

def judgment(message_info):

    '''循环菜单'''

    keys = get_message_key(message_info)

    while True:

        menu_to(keys)

        choice = input('请输入>>>:')

        if choice == ec:

            print('暂时未实现')

            return judgment(message_info)

        elif choice == ex:

            exit('退出程序')

        if type(keys) == type('str') and keys.endswith('end'):

            print('菜单到底了')

            continue

        else:

            if choice in keys:

                message_info = message_info[choice]

                return judgment(message_info)

            else:

                print('输入错误,请重新输入')

if __name__ == '__main__':

    info_message = {'湖南':

                        {'衡阳':

                             {'珠晖区': '湖南工学院'},

                         '湘潭':

                             {'晖晖': '啦啦'}},

                    '北京':

                        {'朝阳':

                             {"德玛": "北京大学"}}}

    ec = 'q'  # 返回上一级

    ex = 'e'  # 退出程序

    menu_go(info_message)