I use python because it is functional psuedocode. Before I learned python, my sketches for algorithms on whiteboards looked like python.

Also, the community practices for coding style are so strong in Python that I can open up nearly any piece of code on the internet and have no problems reading it no matter how junior or senior the person was who wrote it. This is a big win for maintainability and one of the main reasons why I prefer Python over Ruby or Perl.