How to use the xlsx2csv.SheetNotFoundException function in xlsx2csv

if sheet_file is None:
                    sheet_path = None
            if sheet_path is None:
                sheet_path = "/xl/worksheets/worksheet%i.xml" % sheet_index
                sheet_file = self._filehandle(sheet_path)
                if sheet_file is None:
                    sheet_path = None
            if sheet_path is None and sheet_index == 1:
                sheet_path = self.content_types.types["worksheet"]
                sheet_file = self._filehandle(sheet_path)
                if sheet_file is None:
                    sheet_path = None
            if sheet_file is None and sheet_path is not None:
                sheet_file = self._filehandle(sheet_path)
            if sheet_file is None:
                raise SheetNotFoundException("Sheet %i not found" % sheet_index)
            sheet = Sheet(self.workbook, self.shared_strings, self.styles, sheet_file)
            try:
                relationships_path = os.path.join(os.path.dirname(sheet_path),
                                                  "_rels",
                                                  os.path.basename(sheet_path) + ".rels")
                sheet.relationships = self._parse(Relationships, relationships_path)
                sheet.set_dateformat(self.options['dateformat'])
                sheet.set_timeformat(self.options['timeformat'])
                sheet.set_floatformat(self.options['floatformat'])
                sheet.set_skip_empty_lines(self.options['skip_empty_lines'])
                sheet.set_skip_trailing_columns(self.options['skip_trailing_columns'])
                sheet.set_include_hyperlinks(self.options['hyperlinks'])
                sheet.set_merge_cells(self.options['merge_cells'])
                sheet.set_scifloat(self.options['scifloat'])
                sheet.set_ignore_formats(self.options['ignore_formats'])
                if self.options['escape_strings'] and sheet.filedata:

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}')

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')
            yield from gen
        except SheetNotFoundException as e:
            log.warning(f'Sheet weirdness in {self.path}')
            log.warning(str(e))
        except AttributeError as e:
            message = ('Major sheet weirdness (maybe try resaving, '
                       'probably a bug in the xlsx2csv converter)? '
                       f'in {self.path}')
            if self.addError(exc.EncodingError(message),
                             blame='submission',
                             path=self.path):
                log.exception(e)
                logd.critical(message)