How to use the portalocker.AlreadyLocked function in portalocker

sys.exit(0)

        try:
            with TelemetryNote(config_dir) as telemetry_note:
                telemetry_note.touch()

                collection = RecordsCollection(telemetry_note.get_last_sent(), config_dir)
                collection.snapshot_and_read()

                client = CliTelemetryClient()
                for each in collection:
                    client.add(each, flush=True)
                client.flush(force=True)

                telemetry_note.update_telemetry_note(collection.next_send)
        except portalocker.AlreadyLocked:
            # another upload process is running.
            logger.info('Lock out from note file under %s which means another process is running. Exit 0.', config_dir)
            sys.exit(0)
        except IOError as err:
            logger.warning('Unexpected IO Error %s. Exit 1.', err)
            sys.exit(1)
        except Exception as err:  # pylint: disable=broad-except
            logger.error('Unexpected Error %s. Exit 2.', err)
            logger.exception(err)
            sys.exit(2)
    except IndexError:
        sys.exit(1)

def __enter__(self):
        try:
            return self._lock.__enter__()
        except portalocker.AlreadyLocked:
            raise FailedToLock("Failed to lock [{0}]".format(self._name))