Well, the title says the most. Just searching for a new one to learn. Mine is in fact, Python 3.7. I like Python 3.7, because it runs on like everything, even on my small raspi zero.
Mh I should add that I, in this moment, I speak Python, R, in advanced 8/10 levels of skill, HTML in beginner level, as I do in CSS and C++. JS in mid levels of skill
I personally really really recommend python. But then of course, python is also the only lang I know (other than a little js), so that doesn't say much.
As for why, it's because:
a) you have packages for many, many things
b) it's easy enough to pick up, and "pythonic" code is easy to read.