Lisp Vs. Python

I am looking to learn another programming language, I am a bit of a newbie but I know C, Java, and C++ rather well and am looking to expand.

I am interested in AI so I am considering Lisp.
But I also hear python is on the rise so I am considering that.

Which should I choose and why?

The only significant LISP products you see are that yahoo webstore Paul Graham is still banging on about decades later, and whatever that shitty ticket store was. MIT gave up on it too, they now teach with Python.