What is the state of the art in Python data visualisation compared to ggplot2 in R? Over the last few years I have gone exclusively with ggplot2 because it seems so intuitive and customisable.
In my mind, ggplot2 is actually more comparable to matplotlib in that it's more expressive, but less intuitive. It's interesting that the 'successor' to ggplot2,ggvis (which is on ice) , used Vega as a backend.