GNU bug report logs - #49822
28.0.50; python-shell-send functions show no output

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From: Augusto Stoffel <arstoffel <at> gmail.com>
To: Lars Ingebrigtsen <larsi <at> gnus.org>
Cc: Andy Moreton <andrewjmoreton <at> gmail.com>, "Barton, Mark" <Mark.Barton <at> disney.com>, emacs-devel <at> gnu.org, Andreas Schwab <schwab <at> linux-m68k.org>, Stefan Monnier <monnier <at> iro.umontreal.ca>, 49822 <at> debbugs.gnu.org, Michael Albinus <michael.albinus <at> gmx.de>
Subject: bug#49822: master e32c7d2: Change Python eval to send directly instead of using temporary files
Date: Wed, 08 Sep 2021 16:05:11 +0200

[Message part 1 (text/plain, inline)]

On Wed,  8 Sep 2021 at 09:50, Lars Ingebrigtsen <larsi <at> gnus.org> wrote:

> Augusto Stoffel <arstoffel <at> gmail.com> writes:
>
>> I have also rearranged things a bit so that the setup code is sent to
>> the inferior process just once, rather than of on every call to
>> `python-shell-send-string'.  This way, the smaller line length limit
>> doesn't increase too much the use of temp files, which, as I mentioned,
>> is slow over ssh.
>
> This leads to compilation warnings about
> python-shell-eval-file-setup-code etc.
>
> Can you adjust the patch to fix that, and also add the defconst for
> 1024, like Eli discussed?
>
>> PS: I have some more suggestions around the Python shell.  Is the ideal
>> workflow to keep creating bugs with a small patch to each improvement,
>> or do you prefer to review a larger collection of changes bundled
>> together?
>
> Smaller patches are fine by me, and you can submit them with `M-x
> submit-emacs-patch'.

Hi Lars,

I've attached a new patch addressing these 2 points.

I've added the max line length defconst to comint.el, since this
something general about PTYs.  The value reflects my knowledge of the
situation (4096 on Linux, possibly 1024 on other OSes).  Hopefully other
people will fill in more cases eventually.

FWIW, when I read the man page for termios, it seems pretty clear that
MAX_CANON is the name of this parameter we're discussing here.  But if I
do 'getconf MAX_CANON /', I get 255, which is definitely not the right
value for my system.

[0001-Better-treatment-of-line-length-limits-for-the-Pytho.patch (text/x-patch, attachment)]

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