> Python doesn't have a REPL?

Not really in the Lisp sense. If you consider how people typically develop and modify Python code (edit file -> run from beginning -> observe effects -> start over) and how people typically develop Lisp code (rarely do "start over" and "run from beginning" happen) it becomes obvious. Most Python development resembles Go or C++, you just get to skip the explicit "compile" step and go straight to "run". The Python "REPL" is nice for little snippets and little bits of interactive modification but the experience compared to Lisp isn't the same (and I think the experience is actually better/closer to Lisp in Java, with debug mode and JRebel).