三级菜单

Posted 2022-03-06 wzc27229

menu = 
    ‘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‘: ,
    ,
    ‘山东‘: ,


def threeLM(dic):
     while True:
        for k in dic:print(k)
        key = input(‘input>>‘).strip()
        if key == ‘b‘ or key == ‘q‘:return key # 输入b会return b本身，直接结束当前循环，返回上一级，不断输入b，直至结束
        elif key in dic.keys() and dic[key]: # 判断key在列表中，并且有内容不为空，则进行递归执行下一步
            ret = threeLM(dic[key])
            if ret == ‘q‘: return ‘q‘ #如果输入q，则直接退出


threeLM(menu)