[akilat90]

While we're on the subject, I'd like to see what this community has to offer on the efficiency of the pandas groupby-apply operations, which I believe is an idiomatic pandas way. The question [0] on SO is a demonstration where the groupby-apply falls to complete iteration of the dataset(also using some pandas, not sure if that's idiomatic pandas though)

Thanks!

[0] https://stackoverflow.com/questions/45012503/conditionally-p...