We had a great session at office hours on Tuesday, talking about positional vs. keyword arguments, issues with pd.Grouper, the first and last aggregation methods, and using first_valid_index to get the first non-NaN value in a series or data frame.
Office hours are open to paid BW subscribers, and also to members of my Python+Data program (which adds members-only lectures, Python office hours, and access to our Discord, as well as dozens of courses on many Python- and Pandas-related topics).
The recording, and the Jupyter notebook I created during our session, are below.
See you next month!
Reuven