Trust me, Python is doing very well at Enterprise scale. Here's a taster of what it's about in the below links, which are public information, but the Quartz platform is huge. I wish I was at liberty to discuss it in more depth. If you're keen on Python and willing to work hard, it's worth considering Bank of America Merrill Lynch.
https://us.pycon.org/2013/schedule/presentation/155/
http://careers.bankofamerica.com/JobDetails.aspx?SearchPage=...
Take this with a grain of salt. I found working on Quartz to be much more miserable than any other platform I've ever worked with. Of course, that had to do with a lot of factors that weren't related to the language.
As a python-aficionado, I stopped kidding myself a few years ago: Python will never be mainstream in the way Java or C# are, the number of people working with it will always be small, unless something dramatic happens at the commercial level. It's like Linux on the desktop: the masses are simply elsewhere.