bug#31405: 25.3; Python.el doesn't provide infos to info-lookup-symbol

[Lars Ingebrigtsen <larsi@gnus.org>]

Stefan Kangas <stefan@marxist.se> writes:

> Sphinx is used to generate Python docs AFAIK, and it supports info
> format output.  There is also the MELPA package python-info which is
> "a simple Emacs package to provide an info manual for Python":
>
> https://github.com/wilfred/python-info
>
> Perhaps we should support that use case in vanilla Emacs?  One can
> always hope that more GNU/Linux distributions takes the hint and
> starts generating and shipping the info files for Python.  (And that
> interested users files bugs with their respective GNU/Linux
> distribution, Homebrew for OSX, etc. if they don't already do that.)

The Melpa package doesn't seem to exist any more?  So I'm guessing there
isn't much demand for an Info manual for Python, so adding support for
it in info-look would just be frustrating the users, I think.

On the other hand, you have a point that if Emacs did provide hooks into
Info, then perhaps it'd entice people to start distributing .info
files...

Hm...

Oh!  I was looking in melpa-stable -- python-info is indeed in melpa.

OK, I've now added support for python-mode in info-lookup-symbol, and
seems to work in my one test, which was looking up "date", which took me
to:

 -- Class: datetime.date (year, month, day)

     All arguments are required.  Arguments may be ints or longs, in the
     following ranges:

Which seems correct.  People who actually use Python should probably
change 

(info-lookup-maybe-add-help
 :mode 'python-mode
 :doc-spec '(("(python)Index")))

to something that filters/matches more accurately, perhaps.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no