bug#47679: 28.0.50; python-shell-switch-to-shell redisplay bug

[Shitikanth <shitikanth1@gmail.com>]

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Proposed fix.

On Sat, 10 Apr 2021 at 02:22, Shitikanth Kashyap <shitikanth1@gmail.com>
wrote:

> Steps to reproduce:
> 1. emacs -Q
> 2. Open any python file
> 3. Press "C-c C-p"  to start interpreter
> 4. Press "C-c C-z" from the file's window to switch to interpreter
> 5. Go back to file's window with "C-x o" and repeat from 4 a few times.
>
> There is notable lag (sometimes as much as a few seconds) between
> pressing the keybinding "C-c C-z" in file's window before the cursor
> appears to be ready on the interpreter's window. The state of the cursor
> in the two windows after the command appears to be indeterministic and
> inconsistent.
>
> The issue seems to be that the display of the two windows is not updated
> even though internally emacs has changed the focus to the correct
> window. For example, it is possible to start typing in the interpreter
> window immediately after the command, even though the cursor does not
> seem to ready.
>
>
>
>
>
>

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From b2633cb4bc7b259839f1ac3a6215e839c2a74be7 Mon Sep 17 00:00:00 2001
From: Shitikanth Kashyap <shitikanth1@gmail.com>
Date: Sat, 10 Apr 2021 01:32:51 +0530
Subject: [PATCH] Fix python-shell-switch-to-shell redisplay bug

---
 lisp/progmodes/python.el | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lisp/progmodes/python.el b/lisp/progmodes/python.el
index e5c15d148f..3af0bdde2e 100644
--- a/lisp/progmodes/python.el
+++ b/lisp/progmodes/python.el
@@ -3385,7 +3385,7 @@ python-shell-switch-to-shell
 t when called interactively."
   (interactive "p")
   (pop-to-buffer
-   (process-buffer (python-shell-get-process-or-error msg)) nil t))
+   (process-buffer (python-shell-get-process-or-error msg)) nil 'mark-for-redisplay))
 
 (defun python-shell-send-setup-code ()
   "Send all setup code for shell.
-- 
2.30.2