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)

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

文件內容以字典形式

{  "北京市":{
             "東城區":{
                        "東四":["地鐵站"],
                        "燈市口":["汽車站"]
             },

             "西城區":{
                         "阜成門":["南禮士路","金融街"],
                         "復興門":["遠洋大廈","人民電視臺","三裏河"]
             },
             "朝陽區":{
                          "亮馬橋":["希爾頓","藍色港灣"],
                          "團結湖":["朝陽公園","京客隆","甜水園"],
                          "呼家樓":["金泰熙"],
                          "望京":[798,347,891]
             }
           },
  "河北省":{
            "石家莊市":{
                         "長安區":{
                                      "北宋":["何妨小區"],
                                      "河東":["鐘聲廣場"]
                         },
                         "橋西區":{
                                       "新石":["新生活"],
                                       "振頭":["匯華廣場"]
                         },
                         "新華區":{
                                        "東焦":["永泰中街","寧源小學","河北省人民醫院","市二中"],
                                        "合作路":["膏藥章","張家口銀行","光大銀行",887],
                                        "中山":["中國銀行","新百廣場","太和大廈"],
                                        "西裏":["天主堂","眼科","裕華大酒店",773]
                         }
                        },
            "唐山市":{
                          "路南區":{
                                         "雙新裏":["二十六中"],
                                         "衛國樓":["婦幼保健院","聯合大廈"],
                                         "光明裏":["錦江國際酒店"]

                          },
                          "路北區":{
                                          "金隅樂府":["草場樓",776,441],
                                          "國防東道":["新建路"],
                                          "鳳凰道":["4321"]
                          }

                       }

            }
            }

3級菜單實現---low版