Creating pdb breaks in a python file

python-stop-here.el

(defun nkv/stop-here (pos)
  (interactive "d")
  (let (
	(trace-command "import pdb; pdb.set_trace()")
	)
    (save-excursion
      (save-restriction
	(widen)
	(goto-char (point-min))
	(search-forward trace-command nil t)
	(beginning-of-line)
	(kill-line 1)))
    (beginning-of-line)
    (insert (concat trace-command "\n"))
    (forward-line -1)
    (indent-for-tab-command)))