.emacs config snippet for wiring up pep8 and pyflakes to flymake, via an external script.

.emacs-fragment.el

(when (load "flymake" t)
     ;; For Python, I use pyflakes combined with pep8 via a little script
     ;; that mashes them up.  Might want to try flake8 (see pypi) ... it
     ;; adds a complexity checker.
     (defun flymake-pyflakespep8-init ()
       (let* ((temp-file (flymake-init-create-temp-buffer-copy
                          'flymake-create-temp-inplace))
              (local-file (file-relative-name
			      temp-file
			      (file-name-directory buffer-file-name))))
         (list "pyflakespep8.py" (list local-file))))

	 (add-to-list 'flymake-allowed-file-name-masks
                  '("\\.py\\'" flymake-pyflakespep8-init))

	 (add-hook 'find-file-hook 'flymake-find-file-hook)

     ;; This is an add-on I keep in my ~/.emacs.d/ directory which
     ;; ... "makes flymake error messages appear in the minibuffer
     ;; when point is on a line containing a flymake error. This
     ;; saves having to mouse over the error, which is a keyboard
     ;; user's annoyance". See  http://www.emacswiki.org/emacs/flymake-cursor.el
     (load-library "flymake-cursor")

)