bug#29592: 25.3; python does not print input or output in the inferior process

[Augusto Stoffel]

On Sat, 26 Feb 2022 at 08:57, Ben Sturmfels via "Bug reports for GNU Emacs, the 
Swiss army knife of text editors" <bug-gnu-emacs@gnu.org> wrote:

> On Wed, 06 Dec 2017, Alex Branham wrote:
>
>> In python-mode (from python.el), writing
>>
>> import pandas as pd
>> pd.Series([1, 2, 3, 4, 5])
>>
>> after starting an inferior python process, selecting the buffer, and
>> running M-x python-shell-send-region no output is printed in the process
>> buffer even though the statements are evaluated.
>
> I found that Python REPL output is displayed only if the python code is
> on the first line of the buffer. Is this the same for you Alex?
>
> For example, running `emacs -q`, I open /tmp/foo.py, and M-x run-python
> (C-c C-p) to open the Python REPL. Then I switch focus back to the
> foo.py buffer and enter 'abc' on the first line, including quotes. I run
> M-x python-shell-send-statement (C-c C-e), Emacs says 'Sent: "abc"...'
> and '>>> abc\n' is displayed in the REPL. If I add a newline before
> 'abc' and repeat, it says 'Sent: "abc"' and only ">>> " is printed to
> the REPL.
>
> Same issue when using M-x python-shell-send-region (C-c C-r) and
> explicitly highlighting the 'abc' when it's not the first line in the
> buffer.
>
> I'm using GNU Emacs 27.2 (build 1, x86_64-pc-linux-gnu, GTK+ Version
> 3.24.30, cairo version 1.16.0). Windowing system distributor 'The X.Org
> Foundation', version 11.0.12101002. System Description: Guix System

This was fixed in Emacs 28.

> Regards,
> Ben