How to set background color for row with specific column range?

Question

How to set background color for row using set_bg_color -> https://xlsxwriter.readthedocs.io/format.html#set_bg_color but for specific column range? I mean not for entire row but from A2 to G2.

This is what I've done:

        header_format = workbook.add_format({
            'bold': True,
            'text_wrap': False,
            'valign': 'top',
            'fg_color': '#D7E4BC',
            'border': 1})

        text_format = workbook.add_format({'text_wrap': True})

        for col_num, value in enumerate(columns_list):
            worksheet.write(0, col_num, value, header_format)

            # set column length
            length_list = [len(x) + 15 for x in columns_list]
            for i, width in enumerate(length_list):
                worksheet.set_column(i, i, width, text_format)

                # format column description
                if i == 1:
                    description_format = workbook.add_format({
                        'italic': True,
                        'bg_color': '#ebe7ae',
                        'border': 1,
                        'text_wrap': True})
    
                    worksheet.set_row(i, 50, description_format)