How to use the cfclient.VERSION function in cfclient

def _update_debug_info_view(self):
        self._debug_out.setHtml(
            DEBUG_INFO_FORMAT.format(
                version=cfclient.VERSION,
                system=sys.platform,
                pmajor=sys.version_info.major,
                pminor=sys.version_info.minor,
                pmicro=sys.version_info.micro,
                qt_version=QT_VERSION_STR,
                pyqt_version=PYQT_VERSION_STR,
                interface_status=self._interface_text,
                input_devices=self._device_text,
                input_readers=self._input_readers_text,
                uri=self._uri,
                firmware=self._firmware,
                imu_sensors=self._imu_sensors_text,
                imu_sensor_tests=self._imu_sensor_test_text,
                decks=self._decks_text))

def __init__(self, helper, *args):
        super(AboutDialog, self).__init__(*args)
        self.setupUi(self)
        self._close_button.clicked.connect(self.close)
        self._name_label.setText(
            self._name_label.text().replace('#version#', cfclient.VERSION))

        self._interface_text = ""
        self._imu_sensors_text = ""
        self._imu_sensor_test_text = ""
        self._decks_text = ""
        self._uri = None
        self._fw_rev0 = None
        self._fw_rev1 = None
        self._fw_modified = None
        self._firmware = None

        self._helper = helper

        helper.cf.param.add_update_callback(
            group="imu_sensors", cb=self._imu_sensors_update)
        helper.cf.param.add_update_callback(