Shell script that runs pyflakes and pep8

.emacs

(when (load "flymake" t) 
  (defun flymake-pyflakes-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 "pychecker.sh" (list local-file))))
  (add-to-list 'flymake-allowed-file-name-masks
	       '("\\.py\\'" flymake-pyflakes-init)))

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

(global-set-key [f12] 'flymake-display-err-menu-for-current-line)

pychecker.sh

#!/bin/bash
/usr/local/bin/pyflakes $1
/usr/bin/pep8 --repeat $1