asarmy

It would be nice to have a simple way to specify hollow markers in `seaborn.scatterplot()`. One could map the `hue` variable to `edgecolor` by default and add a `facecolor` parameter....

Getting an error using Altair saver when I am trying to save a chart to a PNG in Jupyter Notebook: `ValueError: Unsupported format: 'png'` Answer [here](https://stackoverflow.com/questions/62601904/altair-saver-valueerror-unsupported-format-png) on Stack Overflow suggested...