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# Graphviz

## Inheritance Diagram

If you use `sphinx.ext.inheritance_diagram` to generate inheritance diagrams with `sphinx.ext.graphviz`, and you output the inheritance diagrams in SVG format, they will automatically adapt to this theme’s light or dark mode.

To have the inheritance-diagram render to SVG, inside `conf.py`, you need the following option.

    # conf.py
    ...
    graphviz_output_format = 'svg'
    ...

Below is an example of the inheritance diagram for `matplotlib.figure.Figure`. Try toggling light/dark mode to see it adapt!

digraph inheritance9e891cb219 { bgcolor=transparent; fontsize=14; rankdir=LR; ratio=compress; size="8.0, 12.0"; "matplotlib.artist.Artist" [fillcolor=white,fontname="Vera Sans, DejaVu Sans, Liberation Sans, Arial, Helvetica, sans",fontsize=10,height=0.25,shape=box,style="setlinewidth(0.5),filled",tooltip="Abstract base class for objects that render into a FigureCanvas."]; "matplotlib.figure.Figure" [fillcolor=white,fontname="Vera Sans, DejaVu Sans, Liberation Sans, Arial, Helvetica, sans",fontsize=10,height=0.25,shape=box,style="setlinewidth(0.5),filled",tooltip="The top level container for all the plot elements."]; "matplotlib.figure.FigureBase" -> "matplotlib.figure.Figure" [arrowsize=0.5,style="setlinewidth(0.5)"]; "matplotlib.figure.FigureBase" [fillcolor=white,fontname="Vera Sans, DejaVu Sans, Liberation Sans, Arial, Helvetica, sans",fontsize=10,height=0.25,shape=box,style="setlinewidth(0.5),filled",tooltip="Base class for `.Figure` and `.SubFigure` containing the methods that add"]; "matplotlib.artist.Artist" -> "matplotlib.figure.FigureBase" [arrowsize=0.5,style="setlinewidth(0.5)"]; }

See the sphinx inheritance-diagram documentation for more information.