create subfolders for all categories, too

    # parse configuration

    cfg = config.TestConfig(args.config)

    # create output directory, if not existing

    if not os.path.exists(cfg.output_path):

        create_dir(cfg.output_path)

    # create output directories for categories

    for cat in range(1, 7):

        create_dir(cfg.output_path.joinpath(f"cat{cat}"))

    # set up logging

    logger = logging_init(args, cfg)