How to use the xlsx2csv.Xlsx2csv function in xlsx2csv

'exclude_hidden_sheets': options.exclude_hidden_sheets,
        'merge_cells': options.merge_cells,
        'outputencoding': options.outputencoding,
        'lineterminator': options.lineterminator,
        'ignore_formats': options.ignore_formats
    }
    sheetid = options.sheetid
    if options.all:
        sheetid = 0

    outfile = options.outfile or sys.stdout
    try:
        if os.path.isdir(options.infile):
            convert_recursive(options.infile, sheetid, outfile, kwargs)
        else:
            xlsx2csv = Xlsx2csv(options.infile, **kwargs)
            if options.sheetname:
                sheetid = xlsx2csv.getSheetIdByName(options.sheetname)
                if not sheetid:
                    raise XlsxException("Sheet '%s' not found" % options.sheetname)
            xlsx2csv.convert(outfile, sheetid)
    except XlsxException:
        _, e, _ = sys.exc_info()
        sys.stderr.write(str(e) + "\n")
        sys.exit(1)

def normalize_tabular_format(project_path):
    kwargs = {
        'delimiter' : '\t',
        'skip_empty_lines' : True,
        'outputencoding': 'utf-8',
    }
    sheetid = 0
    for xf in project_path.rglob('*.xlsx'):
        xlsx2csv = Xlsx2csv(xf, **kwargs)
        with open(xf.with_suffix('.tsv'), 'wt') as f:
            try:
                xlsx2csv.convert(f, sheetid)
            except SheetNotFoundException as e:
                log.warning(f'Sheet weirdness in {xf}\n{e}')

def xlsx(self):
        kwargs = {
            'delimiter': '\t',
            'skip_empty_lines': True,
            'outputencoding': 'utf-8',
            'hyperlinks': True,
        }
        sheetid = 1
        try:
            xlsx2csv = Xlsx2csv(self.path.as_posix(), **kwargs)
        except InvalidXlsxFileException as e:
            raise exc.NoDataError(f'{self.path}') from e

        ns = len(xlsx2csv.workbook.sheets)
        if ns > 1:
            message = f'too many sheets ({ns}) in {self.path.as_posix()!r}'
            if self.addError(exc.EncodingError(message),
                             blame='submission',
                             path=self.path):
                logd.error(message)

        f = io.StringIO()
        try:
            xlsx2csv.convert(f, sheetid)
            f.seek(0)
            gen = csv.reader(f, delimiter='\t')