#elpy

You may have no problem programming Python in naked Emacs out of the box. But you may also know that with Emacs, there is always more. Just like the way Popeye would pop a can of spinach down his stomach to boost his act into a super human being’s, you can install a few tiny packages to transform Emacs into a super Python IDE. You won’t regret feeding these supplements to your Emacs, because once you set them up, you will never go back.

Elpy.el mode is the lead actor here, with jedi and rope are in the supporting roles. After installing these three packages, you get everything you wish for from a nice Python IDE: auto-complete, snippet expansion, syntax error highlighting, lint-like pep8 highlighting, indentation highlighting, simultaneous editing, easy code block shifting.

Elpy.el mode itself is a conglomerate of many other packages each of which brings yet another greatness onto the table.