As far as I understand it it's an interpretive programming language that a lot of people use to make utilities and other applications that aren't too resource intensive (I.E. not large 3D games). At least, that's what I think. I could be wrong.
Wikipedia could for sure tell you more,
http://en.wikipedia.org/wiki/Python_...ng_language%29
And here's a tutorial for python if you want to learn it:
http://docs.python.org/tut/