code: def graphviz_imshow(self, ax=None, figsize=None, dpi=300, fmt="png", **kwargs):
          
          graph = self.get_graphviz(**kwargs)
          graph.format = fmt
          graph.attr(dpi=str(dpi))
          #print(graph)
          _, tmpname = tempfile.mkstemp()
          path = graph.render(tmpname, view=False, cleanup=True)
          ax, fig, _ = get_ax_fig_plt(ax=ax, figsize=figsize, dpi=dpi)
          import matplotlib.image as mpimg
          ax.imshow(mpimg.imread(path, format="png")) #, interpolation="none")
          ax.axis("off")
  
          return fig
docs: Generate flow graph in the DOT language and plot it with matplotlib.
  
          Args:
              ax: matplotlib :class:`Axes` or None if a new figure should be created.
              figsize: matplotlib figure size (None to use default)
              dpi: DPI value.
              fmt: Select format for output image
  
          Return: matplotlib Figure