3级菜单实现---low版

json

menu():
    file=(,,=)
    str=f ():
       str=str+file.readline()
    =json.loads(str)
    file.close()
    
dict=menu()

wl(dc):
    :
        m dc:
            (m,(m))
        butter=()
        butter dc:
            wl(dc[butter])
        butter == :
            ()
        butter == :
            k1 dict.keys():
                m dict.keys() m dict[k1].keys():
                    olddc=dict
                    wl(olddc)
                k2 dict[k1].keys():
                    m dict[k1][k2]:
                        olddc=dict[k1]
                        wl(olddc)
                    k3 dict[k1][k2].keys():
                        m dict[k1][k2][k3]:
                            olddc=dict[k1][k2]
                            wl(olddc)

        :
            ()

wl(dict)

---------------------------------------------------

文件内容以字典形式

{  "北京市":{
             "东城区":{
                        "东四":["地铁站"],
                        "灯市口":["汽车站"]
             },

             "西城区":{
                         "阜成门":["南礼士路","金融街"],
                         "复兴门":["远洋大厦","人民电视台","三里河"]
             },
             "朝阳区":{
                          "亮马桥":["希尔顿","蓝色港湾"],
                          "团结湖":["朝阳公园","京客隆","甜水园"],
                          "呼家楼":["金泰熙"],
                          "望京":[798,347,891]
             }
           },
  "河北省":{
            "石家庄市":{
                         "长安区":{
                                      "北宋":["何妨小区"],
                                      "河东":["钟声广场"]
                         },
                         "桥西区":{
                                       "新石":["新生活"],
                                       "振头":["汇华广场"]
                         },
                         "新华区":{
                                        "东焦":["永泰中街","宁源小学","河北省人民医院","市二中"],
                                        "合作路":["膏药章","张家口银行","光大银行",887],
                                        "中山":["中国银行","新百广场","太和大厦"],
                                        "西里":["天主堂","眼科","裕华大酒店",773]
                         }
                        },
            "唐山市":{
                          "路南区":{
                                         "双新里":["二十六中"],
                                         "卫国楼":["妇幼保健院","联合大厦"],
                                         "光明里":["锦江国际酒店"]

                          },
                          "路北区":{
                                          "金隅乐府":["草场楼",776,441],
                                          "国防东道":["新建路"],
                                          "凤凰道":["4321"]
                          }

                       }

            }
            }