How to use the xlrd.error_text_from_code.get function in xlrd

cvals = sh.row_values(rowx)
        for colx in colrange:
            cty = ctys[colx]
            cval = cvals[colx]
            if bk.formatting_info:
                cxfx = str(sh.cell_xf_index(rowx, colx))
            else:
                cxfx = ''
            if cty == xlrd.XL_CELL_DATE:
                try:
                    showval = xlrd.xldate_as_tuple(cval, dmode)
                except xlrd.XLDateError as e:
                    showval = "%s:%s" % (type(e).__name__, e)
                    cty = xlrd.XL_CELL_ERROR
            elif cty == xlrd.XL_CELL_ERROR:
                showval = xlrd.error_text_from_code.get(cval, '' % cval)
            else:
                showval = cval
            result.append((colx, cty, showval, cxfx))
        return result

)
                elif cell.ctype is xlrd.XL_CELL_DATE:
                    is_datetime = cell.value % 1 != 0.0
                    # emulate xldate_as_datetime for pre-0.9.3
                    dt = datetime.datetime(*xlrd.xldate.xldate_as_tuple(cell.value, book.datemode))
                    values.append(
                        dt.strftime(DEFAULT_SERVER_DATETIME_FORMAT)
                        if is_datetime
                        else dt.strftime(DEFAULT_SERVER_DATE_FORMAT)
                    )
                elif cell.ctype is xlrd.XL_CELL_BOOLEAN:
                    values.append(u'True' if cell.value else u'False')
                elif cell.ctype is xlrd.XL_CELL_ERROR:
                    raise ValueError(
                        _("Error cell found while reading XLS/XLSX file: %s") %
                        xlrd.error_text_from_code.get(
                            cell.value, "unknown error code %s" % cell.value)
                    )
                else:
                    values.append(cell.value)
            if any(x for x in values if x.strip()):
                yield values

elif cell.ctype is xlrd.XL_CELL_DATE:
                    is_datetime = cell.value % 1 != 0.0
                    # emulate xldate_as_datetime for pre-0.9.3
                    dt = datetime.datetime(*xlrd.xldate.xldate_as_tuple(
                        cell.value, book.datemode))
                    values.append(
                        dt.strftime(DEFAULT_SERVER_DATETIME_FORMAT)
                        if is_datetime
                        else dt.strftime(DEFAULT_SERVER_DATE_FORMAT)
                    )
                elif cell.ctype is xlrd.XL_CELL_BOOLEAN:
                    values.append(u'True' if cell.value else u'False')
                elif cell.ctype is xlrd.XL_CELL_ERROR:
                    raise ValueError(
                        _("Error cell found while reading XLS/XLSX file: %s") %
                        xlrd.error_text_from_code.get(
                            cell.value, "unknown error code %s" % cell.value)
                    )
                else:
                    values.append(cell.value)
            if any(x for x in values if x.strip()):
                yield values
    _read_xlsx = _read_xls

for colx in colrange:
            cty = ctys[colx]
            cval = cvals[colx]
            if bk.formatting_info:
                cxfx = str(sh.cell_xf_index(rowx, colx))
            else:
                cxfx = ''
            if cty == xlrd.XL_CELL_DATE:
                try:
                    showval = xlrd.xldate_as_tuple(cval, dmode)
                except xlrd.XLDateError:
                    e1, e2 = sys.exc_info()[:2]
                    showval = "%s:%s" % (e1.__name__, e2)
                    cty = xlrd.XL_CELL_ERROR
            elif cty == xlrd.XL_CELL_ERROR:
                showval = xlrd.error_text_from_code.get(cval, '' % cval)
            else:
                showval = cval
            result.append((colx, cty, showval, cxfx))
        return result

def showable_cell_value(celltype, cellvalue, datemode):
    if celltype == xlrd.XL_CELL_DATE:
        try:
            showval = xlrd.xldate_as_tuple(cellvalue, datemode)
        except xlrd.XLDateError:
            e1, e2 = sys.exc_info()[:2]
            showval = "%s:%s" % (e1.__name__, e2)
    elif celltype == xlrd.XL_CELL_ERROR:
        showval = xlrd.error_text_from_code.get(
            cellvalue, '' % cellvalue)
    else:
        showval = cellvalue
    return showval

cvals = sh.row_values(rowx)
        for colx in colrange:
            cty = ctys[colx]
            cval = cvals[colx]
            if bk.formatting_info:
                cxfx = str(sh.cell_xf_index(rowx, colx))
            else:
                cxfx = ''
            if cty == xlrd.XL_CELL_DATE:
                try:
                    showval = xlrd.xldate_as_tuple(cval, dmode)
                except xlrd.XLDateError as e:
                    showval = "%s:%s" % (type(e).__name__, e)
                    cty = xlrd.XL_CELL_ERROR
            elif cty == xlrd.XL_CELL_ERROR:
                showval = xlrd.error_text_from_code.get(cval, '' % cval)
            else:
                showval = cval
            result.append((colx, cty, showval, cxfx))
        return result