My vpython.el mode for ipython. Has the most essential feature: step-through script line-by-line by pressing ctrl-n. I don't know how anybody gets anything done without this feature, and every other 'python mode for emacs' seems to be missing it.
Documentation from the top of the vpython.el file:
vpython-3.92 tuned specifically for ipython use.
vpython.el - is a pair of modes for sending lines from a script (sender) to a comint-started inferior (receiver) process. We use ctrl-n by default as the "send this line and step" key. This enables one to step through scripts easily when working with an interpreter, such as ipython, python, Pure, R, Haskell, shell, and so forth. Functions for stepping through s-expressions for Lisp and Scheme work are also available. This file is by default (in this version) setup for ipython. It should be saved as vpython.el in your ~/.emacs.d/ directory. The ipython executable should be already in your path.
License: This minimal pair of (major and inferior) modes was derived from the Emacs Octave Support modes in octave-mod.el and octave-inf.el, with a little help (and alot of inspiration) from the ess-mode.el for R. As such it falls under the GNU General Public License version 3 or later.
Copyright (C) 2012, Author: Jason E. Aten
how to install:
(1) If you are changing which interpreter you want to use, examine and adjust the "commonly-adjusted parameters" section just below.
(2) Copy (this file) vpython.el into your ~/.emacs.d/ directory.
(3) Then put this in your .emacs:
(load "/home/jaten/.emacs.d/vpython.el") ; adjust path to fit your home directory.
(require 'vpython-mode)
(global-set-key "\C-n" 'vpython-send-line)
(4) Optionally for speed, M-x byte-compile-file ~/.emacs.d/vpython.el
(5) To use, do 'M-x run-vpython' to start the interpreter. Open your script and in the script buffer do 'M-x vpython-mode'.
Or, open a file with an automatically recognized extension
(as specified below) and press 'C-n' on the first line
you want executed in the interpreter.