Python package request: altair

[Randall Pruim]

altair is "is a declarative visualization library for Python. Its simple, friendly and consistent API, built on top of the powerful Vega-Lite grammar, empowers you to spend less time writing code and more time exploring your data."  More info at https://altair-viz.github.io/

Would it be possible to install it in the Sage Cell Server?

---rjp