Adding subtitle and caption

It would be nice to have the caption and subtitle fields.

From https://ggplot2.tidyverse.org/reference/labs.html

p + labs(title = "New plot title", subtitle = "A subtitle")

# The caption appears in the bottom-right, and is often used for
# sources, notes or copyright
p + labs(caption = "(based on data from ...)")

[Ioana-P]

I would also really appreciate this feature; btw Plotnine is amazing, thanks for all your hard work.

If anyone needs an slightly hacky, interim method for getting a subtitle that works most of the time, what I’ve done recently is (for single plots) I’ve made them into a 1 by 1 facet plot. So in pandas I set the subtitle as an additional column, with the same value throughout (e.g., df['subtitle'] = "Subtitle text" and passed that as the faceting variable into facet_wrap. You can then use the theme params for strip_text to make it look as similar to a ggplot sub-title as possible. Naturally this won’t work with actual faceted plots, but it’s a start. 😃 Haven’t figured out anything for captions, yet 😕

[aeturrell]

Very much looking forward to seeing this feature land. Thanks for the amazing work on the package so far!