qrt.py 文件源码

def connect(self, on_connect, on_disconnect=None, on_event=None):
        """Connect to QTM

        :param on_connect: Called on successful connection to QTM. Callback receives an :class:`QRTConnection` object.
        :param on_disconnect: Called if connection fails or when connection is lost.
        :param on_event: Called when there's an event from QTM.

        """
        point = TCP4ClientEndpoint(reactor, self.host, self.port)
        factory = QRTFactory(self.version, on_disconnect, on_event, self.logger)
        try:
            p = yield point.connect(factory)
        except ConnectionRefusedError as reason:
            if on_disconnect:
                on_disconnect(QRTCommandException(str(reason)))
            return
        except Exception as reason:
            if on_disconnect:
                on_disconnect(reason)
            return

        try:
            version = yield p.connected_d
        except Exception as reason:
            if on_disconnect:
                p.on_disconnect = None
                p.transport.loseConnection()
                on_disconnect(reason)
            return

        on_connect(QRTConnection(p), version)