How to use the textfsm.TextFSMTemplateError function in textfsm

tpl_cached_path = __salt__['cp.cache_file'](template_path, saltenv=saltenv)
    if tpl_cached_path is False:
        ret['comment'] = 'Unable to read the TextFSM template from {}'.format(template_path)
        log.error(ret['comment'])
        return ret
    try:
        log.debug('Reading TextFSM template from cache path: {}'.format(tpl_cached_path))
        # Disabling pylint W8470 to nto complain about fopen.
        # Unfortunately textFSM needs the file handle rather than the content...
        # pylint: disable=W8470
        tpl_file_handle = fopen(tpl_cached_path, 'r')
        # pylint: disable=W8470
        log.debug(tpl_file_handle.read())
        tpl_file_handle.seek(0)  # move the object position back at the top of the file
        fsm_handler = textfsm.TextFSM(tpl_file_handle)
    except textfsm.TextFSMTemplateError as tfte:
        log.error('Unable to parse the TextFSM template', exc_info=True)
        ret['comment'] = 'Unable to parse the TextFSM template from {}: {}. Please check the logs.'.format(
            template_path, tfte)
        return ret
    if not raw_text and raw_text_file:
        log.debug('Trying to read the raw input from {}'.format(raw_text_file))
        raw_text = __salt__['cp.get_file_str'](raw_text_file, saltenv=saltenv)
        if raw_text is False:
            ret['comment'] = 'Unable to read from {}. Please specify a valid input file or text.'.format(raw_text_file)
            log.error(ret['comment'])
            return ret
    if not raw_text:
        ret['comment'] = 'Please specify a valid input file or text.'
        log.error(ret['comment'])
        return ret
    log.debug('Processing the raw text:')

)

        try:
            with open(template_path) as f:
                fsm_handler = textfsm.TextFSM(f)

                for obj in fsm_handler.ParseText(raw_text):
                    entry = {}
                    for index, entry_value in enumerate(obj):
                        entry[fsm_handler.header[index].lower()] = entry_value
                    textfsm_data.append(entry)

                return textfsm_data
        except IOError:  # Template not present in this class
            continue  # Continue up the MRO
        except textfsm.TextFSMTemplateError as tfte:
            raise napalm.base.exceptions.TemplateRenderException(
                "Wrong format of TextFSM template {template_name}: {error}".format(
                    template_name=template_name, error=str(tfte)
                )
            )

    raise napalm.base.exceptions.TemplateNotImplemented(
        "TextFSM template {template_name}.tpl is not defined under {path}".format(
            template_name=template_name, path=template_dir_path
        )