Minor cleaning

        """Create a new StreamObject, to manage capture data."""

        # Store a nice ID

        self.id = uuid.uuid4().hex

        logging.info("Created {}".format(self.id))

        logging.info("Created StreamObject {}".format(self.id))

        # Store file format

        self.format = fmt

        # Create file name. Default to UUID

        if not filename:

            filename = self.id

        self.build_file_path(filename, folder, fmt)

        self.build_file_path(filename, folder, self.format)

        # Byte stream properties

        self.stream = io.BytesIO()  # Byte stream that data will be written to

        # Object lock

        self.locked = False

        # Thumbnail (populated only for JPEG captures)

        # Thumbnail (populated only for PIL captures)

        self.thumb_bytes = None

    def __enter__(self):

        else:  # If data stream is empty

            if self.file_exists:  # If data file exists

                # TODO: Streamline this bit

                logging.info("Opening from file {}".format(self.file))

                with open(self.file, 'rb') as f:

                    d = io.BytesIO(f.read())  # Load bytes from file

    def thumbnail(self) -> io.BytesIO:

        # If no thumbnail exists, try and make one

        if not self.thumb_bytes:

            print("Building thumbnail")

            logging.info("Building thumbnail")

            if self.format.upper() in pil_formats:

                im = Image.open(self.data)

                im.thumbnail(thumbnail_size)

    def load_file(self) -> bool:

        """Load data stored on disk to the in-memory stream."""

        if self.file_exists:  # If data file exists

            # TODO: Streamline this bit

            with open(self.file, 'rb') as f:

                self.stream = io.BytesIO(f.read())  # Load bytes from file

            self.stream.seek(0)  # Rewind data bytes again