code: def highlight_max(self, subset=None, color='yellow', axis=0):
          
          return self._highlight_handler(subset=subset, color=color, axis=axis,
                                         max_=True)
docs: Highlight the maximum by shading the background.
  
          Parameters
          ----------
          subset : IndexSlice, default None
              a valid slice for ``data`` to limit the style application to.
          color : str, default 'yellow'
          axis : {0 or 'index', 1 or 'columns', None}, default 0
              apply to each column (``axis=0`` or ``'index'``), to each row
              (``axis=1`` or ``'columns'``), or to the entire DataFrame at once
              with ``axis=None``.
  
          Returns
          -------
          self : Styler