Bug#1023586: texlive-extra-utils: pythontex won't find python (when on python3)

Package: texlive-extra-utils
Version: 2024.20250309-2
Followup-For: Bug #1023586

Dear Maintainer,

I can confirm the bug is still there (I just stumbled upon it).

I could reproduce it with the (quasi)-minimal doc.tex, taken from the
README of https://github.com/gpoore/pythontex:

------------------------------------
\documentclass{article}

\usepackage{pythontex}

\newcommand{\pymultiply}[2]{\py{#1*#2}}

\begin{document}

\begin{pycode}
print("Python says ``Hello!''")
\end{pycode}

$8 \times 256 = \pymultiply{8}{256}$

\end{document}
------------------------------------


I then wrote the following script run.sh in the same directory:

------------------------------------
#! /bin/bash

exec > run.log 2>&1
ls
pdflatex -recorder -interaction=nonstopmode doc.tex
pythontex doc.tex
------------------------------------

I chmoded it +x and ran it. I attach an archive of the resulting
directory (minimal.tgz).

Yours,

J. Courant.


-- Package-specific info:
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In particular, bugs that are related to up-upstream, i.e., neither
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will be closed immediately.

   *** The Debian TeX Team is *not* a LaTeX Help Desk ***

If you report an error when running one of the TeX-related binaries 
(latex, pdftex, metafont,...), or if the bug is related to bad or wrong
output, please include a MINIMAL example input file that produces the
error in your report.

Please run your example with
	(pdf)latex -recorder ...
(or any other program that supports -recorder) and send us the generated
file with the extension .fls, it lists all the files loaded during
the run and can easily explain problems induced by outdated files in
your home directory.

Don't forget to also include minimal examples of other files that are 
needed, e.g. bibtex databases. Often it also helps
to include the logfile. Please, never send included pictures!

If your example file isn't short or produces more than one page of
output (except when multiple pages are needed to show the problem),
you can probably minimize it further. Instructions on how to do that
can be found at

http://www.minimalbeispiel.de/mini-en.html (english)

or 

http://www.minimalbeispiel.de/mini.html (german)

##################################
minimal input file


##################################
other files

######################################
 List of ls-R files

-rw-r--r-- 1 root root 4025 Apr 29 03:02 /var/lib/texmf/ls-R
lrwxrwxrwx 1 root root 29 Feb 28  2025 /usr/share/texmf/ls-R ->
/var/lib/texmf/ls-R-TEXMFMAIN lrwxrwxrwx 1 root root 31 Mar 13  2025
/usr/share/texlive/texmf-dist/ls-R -> /var/lib/texmf/ls-R-TEXLIVEDIST
lrwxrwxrwx 1 root root 31 Mar 13  2025
/usr/share/texlive/texmf-dist/ls-R -> /var/lib/texmf/ls-R-TEXLIVEDIST
###################################### Config files -rw-r--r-- 1 root
root 475 Apr 28 18:47 /etc/texmf/web2c/texmf.cnf lrwxrwxrwx 1 root root
33 Mar 13  2025 /usr/share/texmf/web2c/fmtutil.cnf ->
/var/lib/texmf/fmtutil.cnf-DEBIAN lrwxrwxrwx 1 root root 32 Mar 13
2025 /usr/share/texmf/web2c/updmap.cfg ->
/var/lib/texmf/updmap.cfg-DEBIAN -rw-r--r-- 1 root root 5231 Apr 29
02:59 /var/lib/texmf/tex/generic/config/language.dat
###################################### Files in /etc/texmf/web2c/ total
8 -rw-r--r-- 1 root root 283 Jan 17  2017 mktex.cnf -rw-r--r-- 1 root
root 475 Apr 28 18:47 texmf.cnf ######################################
 md5sums of texmf.d
ca40c66f144b4bafc3e59a2dd32ecb9c  /etc/texmf/texmf.d/00debian.cnf

-- System Information:
Debian Release: 13.4
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable-security'), (500,
'stable') Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 6.12.85+deb13-amd64 (SMP w/8 CPU threads; PREEMPT)
Kernel taint flags: TAINT_PROPRIETARY_MODULE, TAINT_WARN,
TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE Locale: LANG=fr_FR.UTF-8,
LC_CTYPE=fr_FR.UTF-8 (charmap=UTF-8), LANGUAGE not set Shell: /bin/sh
linked to /usr/bin/dash Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages texlive-extra-utils depends on:
ii  libfile-homedir-perl       1.006-2
ii  libunicode-linebreak-perl  0.0.20190101-1+b9
ii  libyaml-tiny-perl          1.76-1
ii  python3                    3.13.5-1
ii  tex-common                 6.19
ii  texlive-base               2024.20250309-1
ii  texlive-binaries           2024.20240313.70630+ds-6
ii  texlive-latex-base         2024.20250309-1
ii  texlive-luatex             2024.20250309-1
ii  texlive-plain-generic      2024.20250309-2

Versions of packages texlive-extra-utils recommends:
ii  ghostscript                10.05.1~dfsg-1+deb13u1
ii  liblog-log4perl-perl       1.57-1
ii  ruby                       1:3.3+b1
ii  texlive-latex-recommended  2024.20250309-1

Versions of packages texlive-extra-utils suggests:
ii  chktex                1.7.9-1
ii  default-jre-headless  2:1.21-76
ii  dvidvi                1.0-10.2
ii  dvipng                1.18-1
ii  fragmaster            1.8-2
ii  lacheck               1.26-17.1
ii  latexdiff             1.3.2-1
ii  latexmk               1:4.86~ds-1
ii  purifyeps             1.1-3
ii  xindy                 2.5.1.20160104-12

Versions of packages tex-common depends on:
ii  ucf  3.0052

Versions of packages tex-common suggests:
ii  debhelper  13.24.2

Versions of packages texlive-extra-utils is related to:
ii  tex-common        6.19
ii  texlive-binaries  2024.20240313.70630+ds-6

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