I use Sublime free for simple tasks. I like the fact it's fast and it saves to disk immediately. You don't have even to name the file. I use it also for taking notes. Probably not as powerful as Vim and it's proprietary. For development, I use PyCharm, but it's an IDE.
I also used in past: gedit: slow atom: slow notepad++: windows only emacs: too much for my needs scite: too minimalist kate: not bad at all visual studio: resource intensive eclipse: slow (even if I continue to use it for non-Python coding) -- https://mail.python.org/mailman/listinfo/python-list
