I'm using Notepad++ for python development, and few days ago I found out about free Komodo Edit.
I need Pros and Cons for Python development between this two editors...
I use Komodo edit.  The main reasons are:  Intellisense (not as good as VisualStudio, but Python's a hard language to do intellisense for) and cross-platform compatibility.  It's nice being able to use the same editor on my Windows machine, my linux machine, and my macbook with little to no change in feel.
Komodo Edit and Notepad++ ::: Pros & Cons ::: Python dev