Pandas functions instead of iteration
Coming back to using Python and Pandas from GoLang has made me aware of the quirks of using dataframes in the place of typed data structures.
While pandas has great convenience features for basic data manipulations on tables, munging get trickier in places you’d want to use a map or hash in other languages. Actually common, and while pandas has a MultiIndex feature, it is a mistake to try to use these with the common Python iterator pattern for star in stars: syntax. Doing this in pandas on cmplex, large datasets can be inefficient and slow. Functions are the faster, more efficient way to do this.

