Python was the subset of Lisp that was understandable by C++ programmers.Being at least a former SmugLispWeenie myself I am having trouble disagreeing. Which is not to say Python is bad, it just loses in certain significant ways that Lisp does not.
Update based comments:
"outside of the CS department"
I think Lisp is safely outside the CS dept. If we could get it *into* the CS dept. maybe things would improve a bit.
"Listing those significant ways"
Syntax extension, syntax itself, closures, continuations (Scheme in this case), to name the top of my list.
I would also include as a result of these, Lisp is a good vehicle for language experimentation (or just defining new object systems), whereas Python provides a simple object system it is more restricted in where you can take it.
Which is not to say that I would not choose Python over 90% of the industry's languages. I would.