code: def simple_export2xlsx(filename, titles, qs, func_data):
      
      output = BytesIO()
      wb = xlwt.Workbook(output)
      ws = wb.add_worksheet(filename)
      header_fmt = wb.add_format()
      header_fmt.set_bg_color('#C4D89E')
      row_idx = 0
      row_idx = xlsw_write_row(ws, row_idx, titles, header_fmt)
      for o in qs:
          row_idx = xlsw_write_row(ws, row_idx, func_data(o))
      fn = '%s-%s.xlsx' % (filename, datetime.now())
      return export_xlsx(wb, output, fn)
docs: export as excel
      filename: file name
      titles: title for this table
      qs: queryset to export
      func_data: a function to format object to list. ex: `lambda o: [o.pk, o.name]`