Extract matplotlib axes from plotnine plots

Seaborn has the nice feature that you can extra matplotlib Axis objects from a FacetGrid, which allows you to make low-level adjustments in matplotlib if necessary.

Is something like this possible in plotnine?

[has2k1]

It is possible. If you manually call the ggplot.draw method, it returns the matplotlib figure; you then get the list of axes; then spine or Axis; and so on. e.g.

p = ggplot() + ...
fig = p.draw()
axs = fig.get_axes()
for ax in axes:
    ax.spine['top'].set(...)
    xaxis = ax.get_xaxis()

[has2k1]

When Matplotlib ships the constraint layout manager, I’ll look into adding secondary axes functionality.