matplotlib.axes.Axes.add_artist

Axes.add_artist(a)

Add an Artist to the Axes; return the artist.

Use add_artist only for artists for which there is no dedicated "add" method; and if necessary, use a method such as update_datalim to manually update the dataLim if the artist is to be included in autoscaling.

If no transform has been specified when creating the artist (e.g. artist.get_transform() == None) then the transform is set to ax.transData.