I admit I recognized only some general NumPy things like masks, unique, reductions, outer etc: I don’t use Pandas and not sure what the non-Numpy stuff does. I

I admit I recognized only some general NumPy things like masks, unique, reductions, outer etc: I don’t use Pandas and not sure what the non-Numpy stuff does. I still don’t think it’s more obscure than equivalent for loops or FP folds or similar.