Thursday, April 7, 2011

flymake & pyflakes

I am writing Python using flymake in Emacs with pyflakes as described in chrism's blog entry on Flymake Mode for Emacs / Python. 
cd ~/elisp
wget http://cvs.savannah.gnu.org/viewvc/*checkout*/emacs/emacs/lisp/progmodes/flymake.el?revision=1.2.4.41
mv flymake.el\?revision\=1.2.4.41 flymake.el
easy_install pyflakes

add the following to .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 "pyflakes" (list local-file)))) 

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

   (add-hook 'find-file-hook 'flymake-find-file-hook)
Posted by John at 10:12 PM
Labels: , ,

1 comment:

mc said...

This has really helped my Python coding. Not only does it catch syntax errors, but it also alerts me to unused imports and variables, so my code is cleaner and my programs are more efficient.

One note, though. The add-hook wound up causing error messages when opening other file types (like .tex), so I replaced it with this:


(add-hook 'python-mode-hook
(lambda ()
; Don't invoke flymake on temporary buffers for the interpreter
(unless (eq buffer-file-name nil) (flymake-mode 1))
(local-set-key [f2] 'flymake-goto-prev-error)
(local-set-key [f3] 'flymake-goto-next-error)))

March 28, 2012 at 11:54 AM

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