code: def write_cell(self, x, y, value, style=None):
          
          if isinstance(style, str):
              style = self.xlwt.easyxf(style)
          if style:
              self._sheet.write(x, y, label=value, style=style)
          else:
              self._sheet.write(x, y, label=value)
docs: writing style and value in the cell of x and y position