code: def write(self, row, col, data, style=None):
          
          ws = self.ws
          if not ws:
              raise Exception('you must use set_sheet() before write()')
  
          if style:
              if isinstance(style, xlwt.Style.XFStyle):
                  s = style
              else:
                  s = self.get_style(style)
              ws.write(row, col, data, s)
          else:
              ws.write(row, col, data)
docs: Write data to row, col of worksheet (ws) using the style
          information.
  
          Again, I'm wrapping this because you'll have to do it if you
          create large amounts of formatted entries in your spreadsheet
          (else Excel, but probably not OOo will crash).