[hervature]

To do that, the code would look something like:

mask = events["Date"].year == 2020 events[mask].groupby("EventType").agg(first_date=("Date", min), last_date=("Date", max), count=("Date", len))

Anyway, I don't understand why terseness is even desirable. We're doing DS and ML, no project never comes down to keystrokes but ability to search the docs and debug does matter.

[Bootvis]

It helps in quickly improving your understanding of the data by being able to answer simple but important questions quicker. In this contrived example I would want to know:

- How many events by type

- When did they happen

- Are there any breaks in the count, why?

- Some statistics on these events like average, min, max

and so on. Terseness helps me in doing this fast.