;; from http://pedrokroger.net/2010/07/configuring-emacs-as-a-python-ide-2/
(defun annotate-pdb ()
  "Highlight break point lines."
  (interactive)
  (highlight-lines-matching-regexp "import i?pdb")
  (highlight-lines-matching-regexp "i?pdb.set_trace()"))

(defun python-toggle-breakpoint ()
  "Add a break point, highlight it."
  (interactive)
  (let ((trace (if (executable-find "ipdb")
                   "import ipdb; ipdb.set_trace()"
                 "import pdb; pdb.set_trace()"))
        (line (thing-at-point 'line)))
    (if (and line (string-match trace line))
        (kill-whole-line)
      (progn
        (back-to-indentation)
        (insert-string trace)
        (insert-string "\n")
        (python-indent-line)))))