The enterprise developer seems to be people who don't even care about programming language because they don't feel strongly one way or the other about it, since they write shitty code anyway and don't have any passion for nice code.
You would add an another language to support from the development to the operational support like monthly security updates. And that's a major risk and most companies won't take it.
If you leave the company then the company may have potentially unsupported app with noone capable of supporting it.
And seriously why would you pick python? Why not perl? Why not ruby?
Generally having a small number of implementation languages in use shouldn't be an issue. In fact, languages are tools and some are better suited than others to certain uses. If an organization supports products of even modest complexity odds are multiple languages and other technologies are required in order to make it work properly.
FWIW, Python is the 4th most popular language on the TIOBE index (after C, C++, Java). It's not likely that $COMPANY is already using Python than Ruby or Perl.