Fast function addition: Jumps below the current defun, from anywhere inside it, at the same indentation level

python-mode-newdef.el

(defun python/find-relative-indentation ()
  "find the previous defun indent level"
  (with-current-buffer (current-buffer)
    (save-excursion
      (let* ((previous-def (progn (search-backward "def ") (point)))
	     (previous-bol (progn (beginning-of-line) (point)))
	     (indent (- previous-def previous-bol)))
	indent))))
 
;; def foo():
;;     """
;;     """
;;     def bar():
;;         """
;;         """
;;         def duh():
;;             """
;;             """
;;             a = 1<CARET>
;;             b = 2
 
;; def foo():
;;     """
;;     """
;;     def bar():
;;         """
;;         """
;;         def duh():
;;             """
;;             """
;;             a = 1
;;             b = 2
;;
;;         <CARET>
 
(defun python/newdef ()
  "place point below the current defun, from anywhere inside it, at the same indent level"
  (interactive)
  (python-nav-end-of-defun)
  (newline)
  (let ((indent (python/find-relative-indentation)))
    (indent-to indent)))