How to use the paperwork-backend.paperwork_backend.util function in paperwork-backend

configfiles = [
            "./paperwork.conf",
            os.path.expanduser("~/.paperwork.conf"),
            ("%s/paperwork.conf"
             % (os.getenv("XDG_CONFIG_HOME",
                          os.path.expanduser("~/.config"))))
        ]

        for self.__configfile in configfiles:
            if os.access(self.__configfile, os.R_OK):
                logger.info("Config file found: %s" % self.__configfile)
                break
        else:
            logger.info("Config file not found. Will use '%s'"
                        % self.__configfile)
        util.mkdir_p(os.path.dirname(self.__configfile))

"""
    tessdata_files = glob.glob("/app/share/locale/*/*.traineddata")
    if len(tessdata_files) <= 0:
        return os.path.exists("/app")

    localdir = os.path.expanduser("~/.local")
    base_data_dir = os.getenv(
        "XDG_DATA_HOME",
        os.path.join(localdir, "share")
    )
    tessdatadir = os.path.join(base_data_dir, "paperwork", "tessdata")

    logger.info("Assuming we are running in Flatpak."
                " Building tessdata directory {} ...".format(tessdatadir))
    util.rm_rf(tessdatadir)
    util.mkdir_p(tessdatadir)

    os.symlink("/app/share/tessdata/eng.traineddata",
               os.path.join(tessdatadir, "eng.traineddata"))
    os.symlink("/app/share/tessdata/osd.traineddata",
               os.path.join(tessdatadir, "osd.traineddata"))
    os.symlink("/app/share/tessdata/configs",
               os.path.join(tessdatadir, "configs"))
    os.symlink("/app/share/tessdata/tessconfigs",
               os.path.join(tessdatadir, "tessconfigs"))
    for tessdata in tessdata_files:
        logger.info("{} found".format(tessdata))
        os.symlink(tessdata, os.path.join(tessdatadir,
                                          os.path.basename(tessdata)))
    os.environ['TESSDATA_PREFIX'] = os.path.dirname(tessdatadir)
    logger.info("Tessdata directory ready")
    return True

.traineddata files from each locale directory
    """
    tessdata_files = glob.glob("/app/share/locale/*/*.traineddata")
    if len(tessdata_files) <= 0:
        return os.path.exists("/app")

    localdir = os.path.expanduser("~/.local")
    base_data_dir = os.getenv(
        "XDG_DATA_HOME",
        os.path.join(localdir, "share")
    )
    tessdatadir = os.path.join(base_data_dir, "paperwork", "tessdata")

    logger.info("Assuming we are running in Flatpak."
                " Building tessdata directory {} ...".format(tessdatadir))
    util.rm_rf(tessdatadir)
    util.mkdir_p(tessdatadir)

    os.symlink("/app/share/tessdata/eng.traineddata",
               os.path.join(tessdatadir, "eng.traineddata"))
    os.symlink("/app/share/tessdata/osd.traineddata",
               os.path.join(tessdatadir, "osd.traineddata"))
    os.symlink("/app/share/tessdata/configs",
               os.path.join(tessdatadir, "configs"))
    os.symlink("/app/share/tessdata/tessconfigs",
               os.path.join(tessdatadir, "tessconfigs"))
    for tessdata in tessdata_files:
        logger.info("{} found".format(tessdata))
        os.symlink(tessdata, os.path.join(tessdatadir,
                                          os.path.basename(tessdata)))
    os.environ['TESSDATA_PREFIX'] = os.path.dirname(tessdatadir)
    logger.info("Tessdata directory ready")

file_path = self.__configfile
        try:
            with open(file_path, 'w') as file_descriptor:
                self._configparser.write(file_descriptor)
            logger.info("Done")
        except IOError as e:
            logger.warn(
                "Cannot write to configuration file %s : %s"
                % (self.__configfile, e.strerror)
            )
            return False

        try:
            # Windows support
            util.hide_file(os.path.expanduser(os.path.join("~", ".config")))
        except Exception as exc:
            logger.warn("Failed to hide configuration file")
            logger.exception(exc)

        return True