'Matplotlib: Adding axhline to subplot within Figure object

I need to find a way how to reference axes within matplotlib.figure.Figure object in order to add axhline(s) to one of the plots. I am using a plot_joint from the package MNE to create an EEG butterfly plot with a couple of topoplots. The lines will serve to showcase windows of statistical significance in the butterfly plot. Thanks!



Solution 1:[1]

Either of these 2 should work, depends on your setup of figure and axes:

fig.axes[0].axhline(...)

OR

ax.axhline(...)

credit to @ImportanceOfBeingErnest for the inspiration

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Solution Source
Solution 1 PeJota