BERJAYA

Proposal: private keyword for import statements to hide module dependencies
by Bjørnar Remmen Dec. 2, 2025

Dec. 2, 2025

Hi, this is my first time here on the mailing list. I would like to open up for a discussion on how we can introduce a way to hide imports. I am proposing the introduction of an optional, non-breaking keyword, private, to be used when importing a file. The goal is to allow developer to hide internal dependencies and prevent them from leaking into the module's public namespace. Under the current system, any object imported into a module's top-level scope becomes an accessible attribute of that module. module/math.py ''' import numpy as np def calculate_mean(data: np.ndarray) -> float: return np.mean(data) ''' The issue is that when a user imports this module, the import is exposed. ''' import module.math # This is valid, even though 'np' is an internal detail: # module.math.np ''' While we have some conventions, we do not have explicit hiding of such modules. We have one solution, which is more like a convention ''' import numpy as _np ''' This hides it for common usage and signals to the developer that it is private. __all__ works for wildcard imports, but not for standard imports. I suggest adopting a solution similar to what has been implemented in swift, which is to introduce a modifier keyword: ''' private import numpy as np def calculate_mean(data: np.ndarray) -> float: return np.mean(data) ''' Internally in the file np is accesible, but when importing the file it is not accesible. Expected behaviour: import module.math module.math.np This raises an AttributeError from module.math import np raises an ImportError from module.math import calculate_mean Succeeds

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Reminder: CFP for the Python Devroom @ FOSDEM 2026 ends Dec 1st
by Marc-Andre Lemburg Nov. 25, 2025

Nov. 25, 2025

Reminder: Call for Participation ends Dec 1st We are happy to announce that we will again be running a*Python devroom at FOSDEM 2026*. The next edition of FOSDEM will take place on January 31 and February 1 2026, with the Python devroom currently scheduled for Saturday, January 31, in the afternoon. If you haven’t heard about FOSDEM before or are looking for more information, you can visit the official website athttps://www.fosdem.org/. As usual, we are looking for multiple Pythonistas to help us shape the devroom schedule. We are now open to receiving your proposals ! With over 8500 participants, FOSDEM is the perfect place to share your story and meet fellow Python enthusiasts. Good luck to everyone applying. We’re looking forward to meeting you all at FOSDEM 2026 ! About FOSDEM * Official FOSDEM 2026 website <https://fosdem.org/2026/> * FOSDEM Code of Conduct <https://fosdem.org/2026/practical/conduct/> FOSDEM is a free and non-commercial event organized by the community for the community. The goal is to provide free and open source software developers and communities a place to meet to: * get in touch with other developers and projects; * be informed about the latest developments in the free software world; * be informed about the latest developments in the open source world; * attend interesting talks and presentations on various topics by project leaders and contributors; * promote the development and benefits of free software and open source solutions. Participation and attendance is totally free, though the FOSDEM organizers gratefully accept donations and sponsorship. Essential Information The Python devroom is currently scheduled to be held on January 31 in the afternoon. * *Submission deadline: December 1 2025* * There will be no extension of the deadline * Announcement of the schedule: December 15 2025 * The reference time is Brussels local lime (CET). * Talk format: 25 minutes presentation, including Q&A, if any. In-person only. * Live streaming of the talks will be available. Speaker Guidelines Please submit your talk proposals using theCFP submission page <https://pretalx.fosdem.org/fosdem-2026/cfp>. * FOSDEM is using a self-hosted Pretalx installation for managing talk submissions. You will need to create an account, if you don’t already have one. * In the Submission notes field, please also confirm that if your talk is accepted, you will be able to attend FOSDEM and deliver your presentation. We will not consider proposals from prospective speakers who are unsure whether they will be able to secure funds for travel and lodging to attend FOSDEM. Sadly, we are not able to offer travel funding for prospective speakers. * You will need to select the "*Python*" track * Keep in mind presentations must be related to Python. All presentations will be recorded and made available under the Creative Commons licenses CC-BY-SA or CC-BY. Captured footage will later be shared online using the FOSDEM archives. By submitting you also agree to these terms. List of Desirable Topics We'd like to make the devroom topics as diverse as possible, so we are looking to offer a mixture of presentations, short tutorials, demos, live coding, etc. This year, the python devroom will focus both on the language itself (new developments, tools and best practices) and its broader applications in education, data science and emerging fields. Examples of these include the following: * How to start as a Python developer * Code infrastructure & starting new projects, e.g. with community-backed tools like uv or pixi * Testing/CI best practices; apps or libraries * Performant Python code * Making use of 3.13t (free-threaded Python with no GIL lock) * Sustainable Python code * How to do/my cool thing/in Python * Python as a tool for education * How to contribute to the Python language * Python 3.13, 3.14, 3.15: What's new? * Python in data analysis & visualization tools * Python in AI & machine learning * Reproducibility and best-practices (e.g. lockfile usage) * The scientific Python ecosystem * How to write secure Python code * Python governance structure * Python success stories * Interoperability and cross-language bindings for Python * New Python projects Volunteers We will also call for volunteers to help us run the event and help us with the devroom operation. Please email the organizers, in case you are interested. Organizers You can reach out directly to the organizers, if you have a specific request or question: * Marc-André Lemburg: mal+fosdem [at] egenix.com * Rosie Wood: rwood [at] turing.ac.uk -- Marc-Andre Lemburg

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Fwd: zipapp: add compression (method), compresslevel options from Zipfile
by Mingye Wang Nov. 17, 2025

Nov. 17, 2025

Forgot to hit reply-all. Oops. ---------- Forwarded message --------- From: Mingye Wang <arthur200126(a)gmail.com> Date: Mon, Nov 17, 2025 at 11:52 AM Subject: Re: zipapp: add compression (method), compresslevel options from Zipfile To: Abdur-Rahmaan Janhangeer <arj.python(a)gmail.com> Yes I do! It's a very small change on top of the existing zipapp.py. You can just run it with "python zipapp.py". I've tried using it to make zstd and stored archives. Tangential: the zip file format compresses each file separately, which reduces the potential for good compression compared to "solid" formats like .tar.gz. We can, however, work around this issue by using two layers of zipping: the inner layer using "store", the outer layer using whatever compression method is chosen by the user. But let's do one thing at a time for now. -- Mingye Wang (Artoria2e5) On Sun, Nov 16, 2025 at 10:43 AM Abdur-Rahmaan Janhangeer <arj.python(a)gmail.com> wrote: > > You have some demo code for it? > > > Kind Regards, > > Abdur-Rahmaan Janhangeer > about | blog > github > Mauritius > > On Mon, 10 Nov 2025, 07:18 Mingye Wang via Python-list, <python-list(a)python.org> wrote: >> >> Zipapp is meant to produce things that will be delivered to an end-user. In this way it should behave like most packaging tools and offer more "thorough" compression options, limited only by the version of the Python interpreter on the user's side (more specifically, their zipfile modules). As a result I believe we should be allowed to choose the compression method and compression level. Some seconds spent on the developer's computer can be minutes saved on downloading from a poor Internet connection. >> >> My proposed API surface include two keyword-only parameters, compression and compresslevel, both having the same meaning and type as their Zipfile counterparts. The compression option should take precedence over the current boolean "compressed" option if it is not set to None; otherwise the settings, including the defaults for "compressed" apply. >> -- >> https://mail.python.org/mailman3//lists/python-list.python.org

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Re: Conda create with python version fails me
by Martin Schöön Nov. 17, 2025

Nov. 17, 2025

Den 2025-11-14 skrev Stefan Ram <ram(a)zedat.fu-berlin.de>: > Martin =?UTF-8?Q?Sch=C3=B6=C3=B6n?= <martin.schoon(a)gmail.com> wrote or quoted: >>If I try to specify a python version I don't get a new environment. The >>error message I get is: >>"The following packages are missing from the target environment: >> - python=3.10" >> (if I asked for version 3.10) > > I'm not educated in Conda. But here are some wild and untested > guesses what could be done: > Your conda know-how is most likely superior to mine :-) > conda search python > > This might list the Python versions available. > Yields an error message very similar to the one cited above. > If the desired version does not appear, adding a channel known > to host older versions might help, like: > > conda create -n test python=3.10 -c conda-forge Bingo! This works for me. > > . It might help to update Conda: > > conda update conda > Was already up-to-date. Didn't bother testing the following. Later maybe. > . This should clear the Conda cache, but I don't know what you might > lose by doing it: > > conda clean --all > > . Check out your conda base and user PATH variables, and prioritize > Conda environments over system-wide Python installations. > > Check your system's networking/firewall configuration doesn't block > Conda's access to remote repositories. > > You could also try to require a more specific version you have, > like for example, "python=3.10.4", instead of, "python=3.10". > Many thanks. /Martin

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Sending FDs over UNIX domain sockets
by Fabiano Sidler Nov. 15, 2025

Nov. 15, 2025

Hi folks! I'm trying to pass some file descriptors over a UNIX domain socket. But either I'm doing something wrong, or there is a bug in Python. Here's my code: === testclient start === #!/usr/bin/env python3 from socket import socket, AF_UNIX, SOCK_STREAM, send_fds import sys path = '/tmp/test' s = socket(AF_UNIX, SOCK_STREAM) s.connect(path) send_fds(s, [bytes()], [ sys.stdin.fileno(), sys.stdout.fileno(), sys.stderr.fileno() ], 3, None) === testclient end === === testserver start === #!/usr/bin/env python3 from socket import socket, AF_UNIX, SOCK_STREAM, recv_fds from os.path import exists from os import remove path = '/tmp/test' s = socket(AF_UNIX, SOCK_STREAM) if exists(path): remove(path) s.bind(path) s.listen(-1) c,_ = s.accept() fds = recv_fds(c, 1024, 3) print(fds) === testserver end === What's the issue? Best wishes, Fabiano

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zipapp: add compression (method), compresslevel options from Zipfile
by Mingye Wang Nov. 15, 2025

Nov. 15, 2025

Zipapp is meant to produce things that will be delivered to an end-user. In this way it should behave like most packaging tools and offer more "thorough" compression options, limited only by the version of the Python interpreter on the user's side (more specifically, their zipfile modules). As a result I believe we should be allowed to choose the compression method and compression level. Some seconds spent on the developer's computer can be minutes saved on downloading from a poor Internet connection. My proposed API surface include two keyword-only parameters, compression and compresslevel, both having the same meaning and type as their Zipfile counterparts. The compression option should take precedence over the current boolean "compressed" option if it is not set to None; otherwise the settings, including the defaults for "compressed" apply.

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Conda create with python version fails me
by Martin Schöön Nov. 14, 2025

Nov. 14, 2025

About two years ago I moved from pip to conda. I have been happy with conda until yesterday. I want to create a new environment using a specific python version rather than leaving that to conda. Cheat-sheets and online conda documentation tell me to use: conda create -n <name> python=<version number> like: conda create -n test python=3.10 Which in my case yields an error message saying python 3.10 is not available in this environment. I have tried variations on the python specification: python==3.10.12 python=3.10.12 To no avail. I think (!??!) I have managed to do this in the past. Any help is more than welcome. /Martin

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argsparse: allowing --version without mandatory options
by Loris Bennett Nov. 3, 2025

Nov. 3, 2025

Hi, I am writing a program for the command-line which uses 'argsparse'. I want to make some options mandatory by setting 'required=True', but still allow the program to run with the option '--version' (which just shows the version and then exits) even if the mandatory options are missing. Is there a standard way of doing this? Cheers, Loris -- This signature is currently under constuction.

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ANN: PyDDF Python Herbst Sprint 2025
by eGenix Team Nov. 3, 2025

Nov. 3, 2025

/This announcement is in German since it targets a local user group//meeting in Düsseldorf, Germany/ Ankündigung Python Meeting Herbst Sprint 2025 <https://www.meetup.com/python-meeting-dusseldorf/events/311837125/> in Düsseldorf <http://www.duesseldorf.de/> Samstag, 15.11.2025, 10:00-18:00 Uhr Sonntag, 16.11.2025. 10:00-18:00 Uhr /Atos Information Technology GmbH <https://atos.net/de/deutschland>/, Am Seestern 1, 40547 Düsseldorf Informationen Das Python Meeting Düsseldorf (PyDDF) <http://pyddf.de/> veranstaltet mit freundlicher Unterstützung von Atos Deutschland <https://eviden.com/de-de/>ein Python Sprint Wochenende. Der Sprint findet am Wochenende 15/16.11.2025 in der Atos Niederlassung, Am Seestern 1, in Düsseldorf statt. * Sprint Ort in Google Maps <https://goo.gl/maps/urWcf3HxXuXxQskf7> Folgende Themengebiete sind als Anregung bereits angedacht: * *AI/ML:* Text to Speech lokal umsetzen * *AI/ML:* pydantic-ai mit lokalen Modellen laufen lassen * *eRechnung:* Fakur-X Bibliothek weiterentwickeln * *DevOps / Home Automation:* Ansible und Home Assistant * *Spotify2Deezer:* Konverter für den Umstieg von Spotify auf Deezer * *Neue Web UIs / RAD Tools:* NiceGUI, Lona, Air ausprobieren und vergleichen Natürlich können die Teilnehmenden weitere Themen vorschlagen und umsetzen. Anmeldung, Kosten und weitere Infos Alles weitere und die Anmeldung findet Ihr auf der Meetup Sprint Seite: * *Python Herbst Sprint & Hackathon in Düsseldorf* <https://www.meetup.com/python-meeting-dusseldorf/events/311837125/> *WICHTIG*: Ohne Anmeldung können wir den Gebäudezugang nicht vorbereiten. Eine spontane Anmeldung am Sprint Tag wird daher vermutlich nicht funktionieren. Teilnehmer sollten sich zudem in der PyDDF Telegram Gruppe registrieren, da wir uns dort koordinieren: * *PyDDF Telegram Gruppe <https://t.me/pyddf>* Über das Python Meeting Düsseldorf Das Python Meeting Düsseldorf <http://pyddf.de/> ist eine regelmäßige Veranstaltung in Düsseldorf, die sich an Python-Begeisterte aus der Region wendet. Einen guten Überblick über die Vorträge bietet unser PyDDF YouTube-Kanal <http://www.youtube.com/pyddf/>, auf dem wir Videos der Vorträge nach den Meetings veröffentlichen. Veranstaltet wird das Meeting von der eGenix.com GmbH <https://www.egenix.com/>, Langenfeld, in Zusammenarbeit mit Clark Consulting & Research <http://www.clark-consulting.eu/>, Düsseldorf. Viel Spaß ! -- Marc-Andre Lemburg eGenix.com Professional Python Services directly from the Experts (#1, Nov 03 2025) >>> Python Projects, Coaching and Support ... https://www.egenix.com/ >>> Python Product Development ... https://consulting.egenix.com/ ________________________________________________________________________ ::: We implement business ideas - efficiently in both time and costs ::: eGenix.com Software, Skills and Services GmbH Pastor-Loeh-Str.48 D-40764 Langenfeld, Germany. CEO Dipl.-Math. Marc-Andre Lemburg Registered at Amtsgericht Duesseldorf: HRB 46611 https://www.egenix.com/company/contact/ https://www.malemburg.com/

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November 2025