Rectangle Edit functions: https://endlessparentheses.com/new-in-emacs-25-1-better-rectangles.html?source=rss

You can essentially use string-rectangle to add something in a rectangle, for example, before every line.

I can also use rectangle-mark-mode to select and edit rectangle. This will be useful for me when copy-pasting a diff with + and - characters preceding the code. :)

Debugging Python in Emacs

You can use gud with pdb to debug Python inside of emacs, it nice and jumps to  source code for the next line of code. Running it is easy, just add a breakpoint in your sorce and run M-x pdb with the command that you'd usually use to run your script or test suite.

GUD will take over as soon as you enter a pdb session from a breakpoint.  You should try, it is VERY COOL!

This is all of my python related emacs config for now:

(require-package 'virtualenvwrapper)
(require-package 'python-mode)

(require-package 'company)

;; (setq py-set-fill-column-p t)
(require-package 'sphinx-doc)
(add-hook 'python-mode-hook (lambda ()
                              (sphinx-doc-mode t)))

(require-package 'python-docstring)
(add-hook 'python-mode-hook (lambda ()
                            (python-docstring-mode)))