_author_ = "Happyboy"

data = {

   '北京':{

        "昌平":{

           "沙河":["Happyboy","test"],

           "天通苑":["我爱我家"]

        },

        "朝阳":{

            "望京":["奔驰","陌陌"],

            "国贸":{"CICC","HP"},

            "东直门":{"Advent","飞信"},

        },

        "海淀":{},

    },

   '山东':{

         "德州":{},

         "青岛":{},

         "济南":{}

    },

   '广东':{

        "东莞":{},

        "常熟":{},

        "佛山":{},

    },

}

exit_flag =False

while not exit_flag:

    for i in data:

        print(i)

    choice = input("选择进入1>>:")

    if choice in data:

        while not exit_flag:

            for i2 in data[choice]:

                print("\t",i2)

            choice2 = input("选择进入2>>:")

            if choice2 in data[choice]:

                while not exit_flag:

                    for i3 in data[choice][choice2]:

                       print("\t\t",i3)

                    choice3 = input("选择进入3>>:")

                    if choice3 in data[choice][choice2]:

                        for i4 in data[choice][choice2][choice3]:

                            print("\t\t",i4)

                        choice4 =input("最后一层，按b返回>>:")

                        if choice4 == "b":

                             pass

                        elif choice4 =="q":

                            exit_flag = True

                    if choice3 == "b":

                        break

                    elif choice3 == "q":

                        exit_flag = True

            if choice2 == "b":

                break

            elif choice2 == "q":

                exit_flag = True