What is a multi-index? How do I create one, and (more importantly), how do I retrieve from one? In this video, I show you a few techniques for working with multi-indexes, including the powerful "xs" method.
The Jupyter notebook for this (and all) videos are at https://github.com/reuven/YouTube-notebooks. And don't forget my free, weekly "Better developers" newsletter about Python and software engineering, at https://BetterDevelopersWeekly.com/.