How to use the pyrad.dictionary.Dictionary function in pyrad

self.t_events = t_events

            while not t_events['stop'].is_set():
                for (fd, event) in self._poll.poll(1000):
                    if event == select.POLLIN:
                        try:
                            fdo = self._fdmap[fd]
                            self._ProcessInput(fdo)
                        except pyrad.server.ServerPacketError as err:
                            logger.info("pyrad server dropping packet: " + str(err))
                        except pyrad.packet.PacketError as err:
                            logger.info("pyrad server received invalid packet: " + str(err))
                    else:
                        logger.error("Unexpected event in pyrad server main loop")

    srv = TestServer(dict=pyrad.dictionary.Dictionary("dictionary.radius"),
                     authport=18138, acctport=18139)
    srv.hosts["127.0.0.1"] = pyrad.server.RemoteHost("127.0.0.1",
                                                     b"radius",
                                                     "localhost")
    srv.BindToAddress("")
    t_events = {}
    t_events['stop'] = threading.Event()
    t_events['msg_auth'] = threading.Event()
    t_events['wrong_secret'] = threading.Event()
    t_events['double_msg_auth'] = threading.Event()
    t = threading.Thread(target=run_pyrad_server, args=(srv, t_events))
    t.start()

    try:
        params = hostapd.wpa2_eap_params(ssid="radius-test")
        params['auth_server_port'] = "18138"

def _get_dictionary(self):
        """
        Get the pyrad Dictionary object which will contain our RADIUS user's
        attributes. Fakes a file-like object using StringIO.
        """
        return Dictionary(StringIO(DICTIONARY))