For Python work I use a pretty much out-of-the-box Emacs, with "magit" being the only plugin of note installed. And I also used "web-mode" when I was doing webdev. magit is the best Git interface ever, and a built-in Emacs feature called TRAMP allows for remote editing. I'm running ipython in a separate terminal. I don't really understand why you'd need something more than a text editor to edit Python code.
Now for Common Lisp I use SLIME, which I guess does count as IDE, seeing as it's much more powerful than most IDEs.
Now for Common Lisp I use SLIME, which I guess does count as IDE, seeing as it's much more powerful than most IDEs.