[xvedejas]

My narrow perspective is that Python is the one language that both companies engaged in ML research (like Google) have been using, and also a very common language of instruction, for instance in the CS program at the school where I studied. If you were a CS student interested in ML/AI, starting school ten to fifteen years ago, but not particularly interested in software engineering, you'd be able to get by with only really knowing Python. Depending on how widespread this is, I'm guessing it's a part of the picture.