For me, the Python module system and documentation wins hands down. I keep telling myself that at some point, I'm going to dive into Lisp and never look back, but Python's module system is very easy to use, and this lends itself to a very nice standard library as well as easy-to-install libraries. Not to mention that every module is well-documented often with real world examples a Google search away.

With Lisp, I have honestly tried to find good documentation on its module system, and I have tried my best to understand the workings of ASDF, but when it comes down to it, I just don't have the time to muck around with stuff that is so much more difficult. The simple fact is that if I need to get something done, it's going to be in Python for the time being, and who knows when I'll get to the point where I'm not coding against a deadline, the point where I'll be able to waste some time really learning Lisp.