GNU bug report logs - #9227
24.0.50; Documentation Lookup in python-mode

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Jan Moringen <jmoringe <at> techfak.uni-bielefeld.de>
To: bug-gnu-emacs <at> gnu.org
Subject: 24.0.50; Documentation Lookup in python-mode
Date: Wed, 03 Aug 2011 04:18:12 +0200

`python-describe-symbol' can fail depending on the pager settings
detected by Python's pydoc module. If a pager is detected, the created
help buffer contains pager error messages about the terminal being not
fully functional instead of the desired documentation.

The problem can be avoided (in a not-threadsafe manner) by modifying
ehelp in etc/emacs2.py as follows:

def ehelp (name, imports):
    """Get help on string NAME.
    First try to eval name for, e.g. user definitions where we need
    the object.  Otherwise try the string form."""
    import pydoc
    old = pydoc.pager
    try:
        pydoc.pager = pydoc.plainpager
        locls = {}
        if imports:
            try: exec imports in locls
            except: pass
        try: help (eval (name, globals(), locls))
        except: help (name)
    finally:
        pydoc.pager = old

This modification rebinds the pydoc.pager global variable to temporarily
disable the detected pager.

In GNU Emacs 24.0.50.1 (x86_64-unknown-linux-gnu, GTK+ Version 2.20.1)
 of 2011-04-20 on azurit
Windowing system distributor `The X.Org Foundation', version
11.0.10706000
configured using `configure  '--prefix=/homes/jmoringe/opt/emacs'
'--with-x-toolkit=gtk' '--with-xft' '--with-gif' 'CC=cc'
'CFLAGS=-I/homes/jmoringe/opt/emacs/include -O2 -pipe'
'LDFLAGS=-L/vol/xcf/lib -Wl,-rpath,/vol/xcf/lib -L/vol/gcc/lib
-Wl,-rpath,/vol/gcc/lib -L/homes/jmoringe/opt/emacs/lib
-Wl,-rpath,/homes/jmoringe/opt/emacs/lib' 'CPPFLAGS=-I/vol/xcf/include
-I/vol/gcc/include -I/homes/jmoringe/opt/emacs/include''

Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: en_US.UTF-8
  value of $XMODIFIERS: nil
  locale-coding-system: utf-8-unix
  default enable-multibyte-characters: t

Major mode: Emacs-Lisp

Minor modes in effect:
  erc-track-mode: t
  erc-track-minor-mode: t
  erc-spelling-mode: t
  erc-ring-mode: t
  erc-notify-mode: t
  erc-networks-mode: t
  erc-netsplit-mode: t
  erc-menu-mode: t
  erc-match-mode: t
  erc-log-mode: t
  erc-list-mode: t
  erc-pcomplete-mode: t
  erc-button-mode: t
  erc-fill-mode: t
  erc-stamp-mode: t
  erc-autojoin-mode: t
  erc-autoaway-mode: t
  erc-irccontrols-mode: t
  erc-noncommands-mode: t
  erc-move-to-prompt-mode: t
  erc-readonly-mode: t
  goto-address-mode: t
  highlight-fixmes-mode: t
  paredit-mode: t
  highlight-parentheses-mode: t
  flyspell-mode: t
  company-mode: t
  electric-pair-mode: t
  url-handler-mode: t
  show-paren-mode: t
  recentf-mode: t
  gud-tooltip-mode: t
  global-whitespace-mode: t
  eldoc-mode: t
  drag-stuff-global-mode: t
  drag-stuff-mode: t
  tooltip-mode: t
  mouse-wheel-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  column-number-mode: t
  line-number-mode: t
  transient-mark-mode: t
  abbrev-mode: t

Recent input:
C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n 
C-n C-n C-n C-n C-n C-n C-n C-n C-x C-f . s b c l / 
s i RET c x m l ESC O C RET t r RET a s d RET C-n C-n 
C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n 
C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n 
C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n 
C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n 
C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n 
C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n 
C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n 
C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n 
C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n 
C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n 
C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n 
C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n 
C-n C-n C-n C-n C-n C-p C-p C-p C-p C-p C-p C-p C-p 
C-p C-p C-p C-p C-p C-p C-p C-p C-p C-p ESC < C-x b 
RET <help-echo> M-x l o a d - t h <return> t a n g 
o - d a r k <return> <switch-frame> M-x s c <return> 
<switch-frame> C-x v d c o d <tab> c l - p r o <tab> 
t <tab> <return> C-x v d M-p / t r <tab> <return> C-n 
C-n C-n C-n <help-echo> <help-echo> M-x r e p o r t 
<return>

Recent messages:
End of buffer [3 times]
Mark set [4 times]
When done with a buffer, type C-x #
Ido mode enabled
Disabling `erc-pcomplete'
Scroll-Bar mode disabled
Making completion list...
vc-responsible-backend: No VC backend is responsible
for /homes/jmoringe/code/cl-protobuf
When done with a buffer, type C-x #
When done with this frame, type C-x 5 0

Load-path shadows:
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Features:
(shadow sort mail-extr message rfc822 mml mml-sec mm-decode mm-bodies
mm-encode mail-parse rfc2231 rfc2047 rfc2045 ietf-drums mailabbrev
mail-utils gmm-utils mailheader emacsbug url-util vc-arch vc-mtn vc-hg
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tramp-compat tramp-loaddefs semantic-tag-write semantic-tag-file
semanticdb-typecache semanticdb-file ede-simple cedet-files ede-linux
ede-emacs ede-dired autorevert dired-x dired network-stream starttls tls
erc-track erc-spelling erc-ring erc-notify erc-networks erc-netsplit
erc-menu erc-match erc-log erc-pcomplete erc-button erc-fill erc-stamp
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ob-comint ob-keys ob ob-eval org-complete pcomplete org-list org-faces
org-compat org-entities org-macs noutline outline cal-menu calendar
cal-loaddefs autoinsert ede-cpp-root srecode-mode cogre-srecode
semantic-edit srecode-template-mode srecode-template srecode-template-wy
semantic-wisent wisent srecode-map saveplace uniquify url-handlers
url-parse auth-source gnus-util time-date password-cache url-vars
mm-util mail-prsvr paren semanticdb-mode recentf tree-widget gud
whitespace semantic-idle eldoc semantic-decorate-mode semantic-decorate
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easy-mmode color-theme-autoloads slime-autoloads rudel-loaddefs
rudel-backend no-upstream-loaddefs matlab-load tex-site auto-loads cedet
cedet-contrib-load contrib-loaddefs cogre-load cogre-loaddefs
speedbar-load speedbar-loaddefs ede-load ede-loaddefs ede-speedbar
ede-files ede ede-base ede-auto eieio-speedbar semantic-ia-sb
semantic-analyze semantic-scope semantic-analyze-fcn semantic-sort
semanticdb-el semanticdb semantic-ctxt semantic-format
semantic-util-modes semantic-util semantic semantic-lex semantic-tag-ls
semantic-tag working fame speedbar sb-image ezimage dframe easymenu
assoc eieio-custom wid-edit ede-source eieio-base srecode-load srecode
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semantic-lisp mode-local find-func derived eieio-load eieio-loaddefs
cedet-load cedet-compat cedet-loaddefs eieio warnings advice help-fns
advice-preload byte-opt bytecomp byte-compile cconv macroexp cl
inversion tooltip ediff-hook vc-hooks lisp-float-type mwheel x-win x-dnd
tool-bar dnd fontset image fringe lisp-mode register page menu-bar
rfn-eshadow timer select scroll-bar mouse jit-lock font-lock syntax
facemenu font-core frame cham georgian utf-8-lang misc-lang vietnamese
tibetan thai tai-viet lao korean japanese hebrew greek romanian slovak
czech european ethiopic indian cyrillic chinese case-table epa-hook
jka-cmpr-hook help simple abbrev minibuffer loaddefs button faces
cus-face files text-properties overlay md5 base64 format env code-pages
mule custom widget hashtable-print-readable backquote
make-network-process dbusbind dynamic-setting system-font-setting
font-render-setting move-toolbar gtk x-toolkit x multi-tty emacs)

Message #8 received at 9227 <at> debbugs.gnu.org (full text, mbox):

From: Glenn Morris <rgm <at> gnu.org>
To: Jan Moringen <jmoringe <at> techfak.uni-bielefeld.de>
Cc: 9227 <at> debbugs.gnu.org
Subject: Re: bug#9227: 24.0.50; Documentation Lookup in python-mode
Date: Fri, 21 Dec 2012 15:03:46 -0500

Jan Moringen wrote:

> `python-describe-symbol' can fail depending on the pager settings
> detected by Python's pydoc module. If a pager is detected, the created
> help buffer contains pager error messages about the terminal being not
> fully functional instead of the desired documentation.
>
> The problem can be avoided (in a not-threadsafe manner) by modifying
> ehelp in etc/emacs2.py as follows:
>
> def ehelp (name, imports):

Neither python-describe-symbol nor etc/emacs2.py exist in Emacs any more
from 24.3 onwards. It looks like the replacement is
python-eldoc-at-point. This issue might be fixed now, but there is no
recipe to reproduce it, so I cannot say. Maybe you could try the latest
pretest 24.2.9x from http://alpha.gnu.org/gnu/emacs/pretest/ and let us
know.

Message #11 received at 9227 <at> debbugs.gnu.org (full text, mbox):

From: Jan Moringen <jmoringe <at> techfak.uni-bielefeld.de>
To: Glenn Morris <rgm <at> gnu.org>
Cc: 9227 <at> debbugs.gnu.org
Subject: Re: bug#9227: 24.0.50; Documentation Lookup in python-mode
Date: Fri, 21 Dec 2012 22:24:14 +0100

On Fri, 2012-12-21 at 15:03 -0500, Glenn Morris wrote:
> Jan Moringen wrote:
> 
> > `python-describe-symbol' can fail depending on the pager settings
> > detected by Python's pydoc module. If a pager is detected, the created
> > help buffer contains pager error messages about the terminal being not
> > fully functional instead of the desired documentation.
> >
> > The problem can be avoided (in a not-threadsafe manner) by modifying
> > ehelp in etc/emacs2.py as follows:
> >
> > def ehelp (name, imports):
> 
> Neither python-describe-symbol nor etc/emacs2.py exist in Emacs any more
> from 24.3 onwards. It looks like the replacement is
> python-eldoc-at-point. This issue might be fixed now, but there is no
> recipe to reproduce it, so I cannot say. Maybe you could try the latest
> pretest 24.2.9x from http://alpha.gnu.org/gnu/emacs/pretest/ and let us
> know.

Since the function has been removed, I think this issue can be
considered fixed. Thanks for asking.

Message #14 received at 9227 <at> debbugs.gnu.org (full text, mbox):

From: Glenn Morris <rgm <at> gnu.org>
To: Jan Moringen <jmoringe <at> techfak.uni-bielefeld.de>
Cc: 9227 <at> debbugs.gnu.org
Subject: Re: bug#9227: 24.0.50; Documentation Lookup in python-mode
Date: Fri, 21 Dec 2012 17:37:47 -0500

Jan Moringen wrote:

> Since the function has been removed, I think this issue can be
> considered fixed.

That's not obvious to me, since there seems to similar code, but still
no reference to "pager" anywhere AFAICS.

http://bzr.savannah.gnu.org/lh/emacs/emacs-24/annotate/head:/lisp/progmodes/python.el

Message #17 received at 9227 <at> debbugs.gnu.org (full text, mbox):

From: Jan Moringen <jmoringe <at> techfak.uni-bielefeld.de>
To: Glenn Morris <rgm <at> gnu.org>
Cc: 9227 <at> debbugs.gnu.org
Subject: Re: bug#9227: 24.0.50; Documentation Lookup in python-mode
Date: Sat, 22 Dec 2012 03:26:32 +0100

On Fri, 2012-12-21 at 17:37 -0500, Glenn Morris wrote:
> Jan Moringen wrote:
> 
> > Since the function has been removed, I think this issue can be
> > considered fixed.
> 
> That's not obvious to me, since there seems to similar code, but still
> no reference to "pager" anywhere AFAICS.

The current python.el does not seem to use the pydoc module anymore
(which caused the reported problem). inspect.getdoc() seems to be used
instead. As far as I can see, inspect.getdoc() has a string-based
interface and does not print anything, so a pager is not involved.

Message #22 received at 9227-done <at> debbugs.gnu.org (full text, mbox):

From: Glenn Morris <rgm <at> gnu.org>
To: 9227-done <at> debbugs.gnu.org
Subject: Re: bug#9227: 24.0.50; Documentation Lookup in python-mode
Date: Sat, 22 Dec 2012 13:44:58 -0500

Version: 24.3

Jan Moringen wrote:

> The current python.el does not seem to use the pydoc module anymore
> (which caused the reported problem). inspect.getdoc() seems to be used
> instead. As far as I can see, inspect.getdoc() has a string-based
> interface and does not print anything, so a pager is not involved.

OK.

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