Python is used because it allows to programmer to write ugly, stupid, illegible code. Everything written in Python has to be a piece of shit -- the interpreter accepts no less.
Shitty code monkeys love Python because they don't want to think too hard about programming. Employers love Python because they want to hire shitty minimum wage code monkeys to write programs. Teachers love Python because 99% of their students fail programming classes where Python is not taught (because the students hate programming and only want to become shitty code monkeys). With a demand for Python programmers and a supply of fresh CS graduates who only know Python and a little theory, the community blew up.
Real programmers use Haskell. They use it not because the programs compile fast, or because machine code generated from Haskell runs fast, or because Haskell programs are highly memory efficient (although these all are certainly true). Real programmers use Haskell because Python code is ugly.