It's dominance of science is why Python has 25% science talks this year at PyCon, and why we see articles like: http://www.infoworld.com/article/3012442/application-develop...
But yes, if you didn't know any languages, then of course you should invest in an immature language with no mature libraries for the tasks you need to complete, because you were given a few months of extra runway time by your boss to fill-in the library ecosystem instead of getting your job done. We'll ignore that PyPy places you damn close to Go in terms of performance (except with mature proven libs), and that usually your task won't be CPU-bound anyways (the GIL release on I/O tasks)....
Why do troll questions like this even hit the front page of HN?