sniffer.py 文件源码

def __enter__(self):
        self._log.debug("Choosing the first available Bluetooth adapter and "
                        "starting device discovery.")
        self._log.debug("The discovery filter is set to Bluetooth LE only.")
        try:
            self.adapter = find_adapter()
            self.adapter.SetDiscoveryFilter({"Transport": pydbus.Variant("s", "le")})
            self.adapter.StartDiscovery()
        except GLib.Error as ex:
            self._log.exception("Is the bluetooth controller powered on? "
                                "Use `bluetoothctl`, `power on` otherwise.")
            raise ex
        return self