sigh Polars was really nice until I had to make some plots and discovered that Plotly Express only works with Pandas dataframes. (Apparently some parts of PX will work if I pass in series objects rather than dataframes, but that's going to be clunky to explain to students.) If I don't want to use matplotlib or anything built on top of it (e.g. Seaborn), is Altair my best choice?
