Python_三级菜单

area = {
    '东城区':{
        '安定门街道':['五道营','永康','箭厂','国西','国东','方家'],
        '建国门街道':['毛家湾办事处','东观音寺办事处','江擦办事处','西裱褙办事处','方巾巷办事处'],
        '朝阳门街道':['本司胡同','大方家胡同','灯草胡同','礼士胡同']
    },
    '西城区':{
        '西长安街街道':['南北长街','府右街南','光明','西交民巷','北新华街'],
        '金融街街道':['辖阜西','民康','锦北','王府仓','大喜'],
        '牛街街道':['菜市口胡同','北半截胡同','南半截胡同','银行宿舍','烂缦胡同']
    },
    '朝阳区':{
        '南磨房地区':['双龙一','双龙二','双龙三','双龙四','双龙五'],
        '高碑店地区':['高井','八里庄','北花园','高碑店','半堡店'],
        '将台地区':['安家楼','驼房营','东八间房','西八间房']
    },
}

 

while True:
    for element in options:
        print(element)
    choose = input("Please enter your options:")
    if choose in options:
        options_list.append(options)
        options = options[choose]
    elif choose == "b":
        if options_list:
            options = options_list.pop()
12     else:
        print("No such service!")