It was pandas, unfortunately. R had the stats/ML crowd for a long time, and data frames are super hard to abandon. Python had a library for them, and was percei

It was pandas, unfortunately. R had the stats/ML crowd for a long time, and data frames are super hard to abandon. Python had a library for them, and was perceived as being simple so it won. R still has most of the tribal knowledge about stats/modelling though, so many really good DS's end up having to learn python to communicate with software engineers.