菜单二

#Author: Administrator
#Date: 2019/7/2 - 15:05

menu = {
    '北京':{
        '朝阳':{
            '国贸':{
                'CICC':{},
                'HP':{},
                '渣打银行':{},
                'CCTV':{},
            },
            '望京':{
                '陌陌':{},
                '奔驰':{},
                '360':{},
            },
            '三里屯':{
                '优衣库':{},
                'apple':{}
            },
        },
        '昌平':{
            '沙河':{
                "老男孩":{},
                "阿泰包子":{},
            },
            '天通苑':{
                "链家":{},
                "我爱我家":{}
            },
            '回龙观':{},
        },
        '海淀':{
            "五道口":{
                "google":{},
                "谷歌":{},
                "网易":{},
                "Sohu":{},
                "Sogo":{},
                "快手":{},
            },
            "中关村":{
                "youku":{},
                "Iqiyi":{},
                "汽车之家":{},
                "新东方":{},
                "QQ":{},
            }
        },
    },
    '上海':{
        "浦东":{
            "陆家嘴":{
                "CICC":{},
                "高盛":{},
                "摩根":{},
            },
            "外滩":{},
        },
        "闵行":{},
        "静安":{},
    },
    '山东':{
      "济南":{},
      "德州":{
          "乐陵":{
              "丁务镇":{},
              "城区":{},
          },
          "平原":{},
      },
    },
}

current_layer = menu
#parent_layer = menu

parent_layers = []
while True:
    for key in current_layer:
        print(key)
    choice = input(">>>").strip()
    if len(choice) == 0 :
        continue
    if choice in current_layer :
        parent_layers.append(current_layer)
        current_layer = current_layer[choice]
    elif choice == "b":
        if parent_layers :
            current_layer = parent_layers.pop()
    else :
        print('无此项')

转载于:https://www.cnblogs.com/styleonme/p/11121529.html