code: def set_style(style, mpl=False, **kwargs):
      
      if mpl:
          import matplotlib as mpl
  
          style_dictionary = {}
          if isinstance(style, string_types):
              style_dictionary = get_style(style, mpl=True, **kwargs)
              log.info("using matplotlib style '{0}'".format(style))
          elif isinstance(style, dict):
              style_dictionary = style
              log.info("using user-defined matplotlib style")
          else:
              raise TypeError("style must be a matplotlib style name or dict")
          for k, v in style_dictionary.items():
              mpl.rcParams[k] = v
      else:
          if isinstance(style, string_types):
              style = get_style(style, **kwargs)
          log.info("using ROOT style '{0}'".format(style.GetName()))
          style.cd()
docs: If mpl is False accept either style name or a TStyle instance.
      If mpl is True accept either style name or a matplotlib.rcParams-like
      dictionary