Emacs 23, Python, epylint, pylint

Emacs 23, Python, epylint, pylint

[Richard Riley]

I have followed the advice here:

http://stackoverflow.com/questions/1259873/how-can-i-use-emacs-flymake-mode-for-python-with-pyflakes-and-pylint-checking-cod

or

http://tinyurl.com/yfshb5b

And successfully have pylint and emacs highlighting errors in my .py
files courtesy of flymake. The problem is that I can't see anywhere the
actually error description. Can anyone help please?

The epylint script I have is this:

,----
| #!/usr/bin/env python
| 
| import re
| import sys
| 
| from subprocess import *
| 
| p = Popen(
|     "pylint -f parseable -r n %s"%
|     sys.argv[1], shell = True, stdout = PIPE).stdout
| 
| for line in p:
|     match = re.search("\\[([WECR])(, (.+?))?\\]", line)
|     if match:
|         kind = match.group(1)
|         func = match.group(3)
| 
|         if kind in ["W","C","R"]:
|            msg = "Warning"
|         else:
|            msg = "Error"
| 
|         if func:
|             line = re.sub("\\[([WECR])(, (.+?))?\\]",
|                           "%s (%s):" % (msg, func), line)
|         else:
|             line = re.sub("\\[([WECR])?\\]", "%s:" % msg, line)
|     print line,
| 
| p.close()
`----


regards

r.

Re: Emacs 23, Python, epylint, pylint

[Richard Riley]

Richard Riley <rileyrgdev@gmail.com> writes:

> I have followed the advice here:
>
> http://stackoverflow.com/questions/1259873/how-can-i-use-emacs-flymake-mode-for-python-with-pyflakes-and-pylint-checking-cod
>
> or
>
> http://tinyurl.com/yfshb5b
>
> And successfully have pylint and emacs highlighting errors in my .py
> files courtesy of flymake. The problem is that I can't see anywhere the
> actually error description. Can anyone help please?
>
> The epylint script I have is this:
>
> ,----
> | #!/usr/bin/env python
> | 
> | import re
> | import sys
> | 
> | from subprocess import *
> | 
> | p = Popen(
> |     "pylint -f parseable -r n %s"%
> |     sys.argv[1], shell = True, stdout = PIPE).stdout
> | 
> | for line in p:
> |     match = re.search("\\[([WECR])(, (.+?))?\\]", line)
> |     if match:
> |         kind = match.group(1)
> |         func = match.group(3)
> | 
> |         if kind in ["W","C","R"]:
> |            msg = "Warning"
> |         else:
> |            msg = "Error"
> | 
> |         if func:
> |             line = re.sub("\\[([WECR])(, (.+?))?\\]",
> |                           "%s (%s):" % (msg, func), line)
> |         else:
> |             line = re.sub("\\[([WECR])?\\]", "%s:" % msg, line)
> |     print line,
> | 
> | p.close()
> `----
>

OK, its done so that you need to (yuck!) hover your mouse over the
hilited error. Kind of in the face of keyboard driven emacs, but at
least one can see the error. If anyone has a patch/fix/advice on how to
change this to show the errors in a buffer and maybe next error/previous
error then that would be great. In fact pylint.el does something like
that but it would be nice in conjunction with the flymake dynamic code
checking and error hiliting.

Re: Emacs 23, Python, epylint, pylint

[Richard Riley]

Richard Riley <rileyrgdev@gmail.com> writes:

> Richard Riley <rileyrgdev@gmail.com> writes:
>
>> I have followed the advice here:
>>
>> http://stackoverflow.com/questions/1259873/how-can-i-use-emacs-flymake-mode-for-python-with-pyflakes-and-pylint-checking-cod
>>
>> or
>>
>> http://tinyurl.com/yfshb5b
>>
>> And successfully have pylint and emacs highlighting errors in my .py
>> files courtesy of flymake. The problem is that I can't see anywhere the
>> actually error description. Can anyone help please?
>>
>> The epylint script I have is this:
>>
>> ,----
>> | #!/usr/bin/env python
>> | 
>> | import re
>> | import sys
>> | 
>> | from subprocess import *
>> | 
>> | p = Popen(
>> |     "pylint -f parseable -r n %s"%
>> |     sys.argv[1], shell = True, stdout = PIPE).stdout
>> | 
>> | for line in p:
>> |     match = re.search("\\[([WECR])(, (.+?))?\\]", line)
>> |     if match:
>> |         kind = match.group(1)
>> |         func = match.group(3)
>> | 
>> |         if kind in ["W","C","R"]:
>> |            msg = "Warning"
>> |         else:
>> |            msg = "Error"
>> | 
>> |         if func:
>> |             line = re.sub("\\[([WECR])(, (.+?))?\\]",
>> |                           "%s (%s):" % (msg, func), line)
>> |         else:
>> |             line = re.sub("\\[([WECR])?\\]", "%s:" % msg, line)
>> |     print line,
>> | 
>> | p.close()
>> `----
>>
>
> OK, its done so that you need to (yuck!) hover your mouse over the
> hilited error. Kind of in the face of keyboard driven emacs, but at
> least one can see the error. If anyone has a patch/fix/advice on how to
> change this to show the errors in a buffer and maybe next error/previous
> error then that would be great. In fact pylint.el does something like
> that but it would be nice in conjunction with the flymake dynamic code
> checking and error hiliting.
>

A more careful read of the flymake wiki page 

http://www.emacswiki.org/emacs/FlyMake

provided the answer:

http://paste.lisp.org/display/60617

,----
| (defun show-fly-err-at-point ()
|   "If the cursor is sitting on a flymake error, display the
| message in the minibuffer"
|   (interactive)
|   (let ((line-no (line-number-at-pos)))
|     (dolist (elem flymake-err-info)
|       (if (eq (car elem) line-no)
| 	  (let ((err (car (second elem))))
| 	    (message "%s" (fly-pyflake-determine-message err)))))))
| 
| (defun fly-pyflake-determine-message (err)
|   "pyflake is flakey if it has compile problems, this adjusts the
| message to display, so there is one ;)"
|   (cond ((not (or (eq major-mode 'Python) (eq major-mode 'python-mode) t)))
| 	((null (flymake-ler-file err))
| 	 ;; normal message do your thing
| 	 (flymake-ler-text err))
| 	(t ;; could not compile err
| 	 (format "compile error, problem on line %s" (flymake-ler-line err)))))
| 
| (defadvice flymake-goto-next-error (after display-message activate compile)
|   "Display the error in the mini-buffer rather than having to mouse over it"
|   (show-fly-err-at-point))
| 
| (defadvice flymake-goto-prev-error (after display-message activate compile)
|   "Display the error in the mini-buffer rather than having to mouse over it"
|   (show-fly-err-at-point))
| 
| (defadvice flymake-mode (before post-command-stuff activate compile)
|   "Add functionality to the post command hook so that if the
| cursor is sitting on a flymake error the error information is
| displayed in the minibuffer (rather than having to mouse over
| it)"
|   (set (make-local-variable 'post-command-hook)
|        (cons 'show-fly-err-at-point post-command-hook))) 
`----


(I think this should be default behaviour as most Emacs users balk from
using the mouse :-;)

Re: Emacs 23, Python, epylint, pylint

[Anselm Helbig]

At Thu, 22 Oct 2009 03:48:39 +0200,
Richard Riley <rileyrgdev@gmail.com> wrote:
> 
> Richard Riley <rileyrgdev@gmail.com> writes:
> 
> > [...]
> >
> > And successfully have pylint and emacs highlighting errors in my .py
> > files courtesy of flymake. The problem is that I can't see anywhere the
> > actually error description. Can anyone help please?
> >
> > [...]
> 
> OK, its done so that you need to (yuck!) hover your mouse over the
> hilited error. Kind of in the face of keyboard driven emacs, but at
> least one can see the error. If anyone has a patch/fix/advice on how to
> change this to show the errors in a buffer and maybe next error/previous
> error then that would be great. In fact pylint.el does something like
> that but it would be nice in conjunction with the flymake dynamic code
> checking and error hiliting.

While looking for a solution to this very problem I found out about
display-local-help, bound to `C-h .' here. Good enough for me, and no
configuration necessary. 8-)

HTH, 

Anselm


-- 
Anselm Helbig 
mailto:anselm.helbig+news2009@googlemail.com

Re: Emacs 23, Python, epylint, pylint

[Richard Riley]

Anselm Helbig <anselm.helbig+news2009@googlemail.com> writes:

> At Thu, 22 Oct 2009 03:48:39 +0200,
> Richard Riley <rileyrgdev@gmail.com> wrote:
>> 
>> Richard Riley <rileyrgdev@gmail.com> writes:
>> 
>> > [...]
>> >
>> > And successfully have pylint and emacs highlighting errors in my .py
>> > files courtesy of flymake. The problem is that I can't see anywhere the
>> > actually error description. Can anyone help please?
>> >
>> > [...]
>> 
>> OK, its done so that you need to (yuck!) hover your mouse over the
>> hilited error. Kind of in the face of keyboard driven emacs, but at
>> least one can see the error. If anyone has a patch/fix/advice on how to
>> change this to show the errors in a buffer and maybe next error/previous
>> error then that would be great. In fact pylint.el does something like
>> that but it would be nice in conjunction with the flymake dynamic code
>> checking and error hiliting.
>
> While looking for a solution to this very problem I found out about
> display-local-help, bound to `C-h .' here. Good enough for me, and no
> configuration necessary. 8-)
>
> HTH, 
>
> Anselm


The flymake-cursor extension is the best! I'm still wondering about the
design decision to only show the error if you hover the mouse however
:-; Since it only appears in a lisp paste bucket at the moment, I
duplicated it here

http://tinyurl.com/yj6cf3x

Re: Emacs 23, Python, epylint, pylint

[Dave Love]

Richard Riley <rileyrgdev@gmail.com> writes:

> A more careful read of the flymake wiki page 
>
> Http://www.emacswiki.org/emacs/FlyMake
>
> Provided the answer:
>
> http://paste.lisp.org/display/60617

[Gross code elided.]

What's wrong with just adding this to `post-command-hook'?

  (defun my-flymake-show-help ()
    (when (get-char-property (point) 'flymake-overlay)
      (let ((help (get-char-property (point) 'help-echo)))
        (if help (message "%s" help)))))

(It would be better if overlays supported the `point-entered' property.)

> (I think this should be default behaviour as most Emacs users balk from
> using the mouse :-;)

[I'm surprised if that's the case and if anyone actually knows.]

Re: Emacs 23, Python, epylint, pylint

[Richard Riley]

Dave Love <fx@domain.invalid> writes:

> Richard Riley <rileyrgdev@gmail.com> writes:
>
>> A more careful read of the flymake wiki page 
>>
>> Http://www.emacswiki.org/emacs/FlyMake
>>
>> Provided the answer:
>>
>> http://paste.lisp.org/display/60617
>
> [Gross code elided.]
>
> What's wrong with just adding this to `post-command-hook'?
>
>   (defun my-flymake-show-help ()
>     (when (get-char-property (point) 'flymake-overlay)
>       (let ((help (get-char-property (point) 'help-echo)))
>         (if help (message "%s" help)))))

I have no idea. The other code works and was linked on the wiki. Maybe your
code could replace it? 

> (It would be better if overlays supported the `point-entered' property.)
>
>> (I think this should be default behaviour as most Emacs users balk from
>> using the mouse :-;)
>
> [I'm surprised if that's the case and if anyone actually knows.]
>

Well, the mouse usage being mandatory was the default and is not
really "emacs" thinking IMO : hence the wiki had the fix/workaround.

FWIW, I would hazard a guess that most emacs users tend not to be mouse
wielders in the main .. too many of our hands are already required :-;

Thanks for the reply and I will try code above : it certainly looks to
be short and sweet. If it does the job I'll add it to the wiki if thats
ok.

regards


r.

Re: Emacs 23, Python, epylint, pylint

[Richard Riley]

Dave Love <fx@domain.invalid> writes:

> Richard Riley <rileyrgdev@gmail.com> writes:
>
>> A more careful read of the flymake wiki page 
>>
>> Http://www.emacswiki.org/emacs/FlyMake
>>
>> Provided the answer:
>>
>> http://paste.lisp.org/display/60617
>
> [Gross code elided.]
>
> What's wrong with just adding this to `post-command-hook'?
>
>   (defun my-flymake-show-help ()
>     (when (get-char-property (point) 'flymake-overlay)
>       (let ((help (get-char-property (point) 'help-echo)))
>         (if help (message "%s" help)))))
>

Yes, adding that as a post-command-hook worked well. There was similar
code on the wiki but rather using wrappers for
flymake-goto-next-error. I like the errors to appear when I cursor over
the error in "live editing" mode so your solution is better for me. Wiki
updated.

thanks

r.

Re: Emacs 23, Python, epylint, pylint

[Dave Love]

Richard Riley <rileyrgdev@gmail.com> writes:

> I have followed the advice here:
>
> http://stackoverflow.com/questions/1259873/how-can-i-use-emacs-flymake-mode-for-python-with-pyflakes-and-pylint-checking-cod

For what it's worth, the mode at
<url:http://www.loveshack.ukfsn.org/emacs/#python.el> has flymake
support built-in, though it was buggy until recently.  I'd be interested
to know if there's something wrong with it.