I’m happy to announce that the Steering Council has approved my proposal to hold the next Language Summit at @europython.eu 2026 and then alternate with @pycon.us! discuss.python.org/t/language-s... ep2026.europython.eu #Python #LanguageSummit #EuroPython

An introduction to PEP-814: lwn.net/SubscriberLi... My best wishes for having it in 3.15! ❤️🤞🏼

I wrote a new PEP with Donghee Na: "PEP 814: Add frozendict built-in type": discuss.python.org/t/104854 A new public immutable type frozendict is added to the builtins module. The insertion order is preserved and a frozendict can be hashed.

Looking to make a CPython contribution? I'm going to start working on maintaining a "Good First Issue" board for argparse. If you're interested, have a look and let me know on the GitHub issue if you have any questions. Happy to help 🤝🏻! github.com/orgs/python/...

New blog post! Decompression is up to 30% faster in CPython 3.15 This blog goes over a journey to find an optimization in some lower-level code in CPython that yields a speedup of 10-30% when decompressing more than 1MiB of data. emmatyping.dev/decompressio...

Wooo, unanimous acceptance of 810! Python is getting lazy imports! So excited about this! discuss.python.org/t/pep-810-ex...

🎙️ Bored this weekend? Part 2 of the interviews from the CPython core sprint in Cambridge UK is out. Don’t worry, it's shorter than Part 1. Only 2 hours 18 minutes! ✨ Hear from Greg, Thomas, Paul, Pradyun, Carol, Guido, Brett, Erlend, Tal, Lys, Yury, and Diego. creators.spotify.com/pod/profile/...

In the Python C API, I dislike APIs modifying immutable objects like _PyBytes_Resize(). I designed a new PyBytesWriter API to replace this function. As usual in Python, it took multiple iterations and one year to design the API and to reach an agreement. vstinner.github.io/pep-782-pyby...

The future Python 3.15 just got a new os.statx() function thanks to Jeffrey Bosboom! Documentation: docs.python.org/dev/library/... The syscall was added to Linux 4.11 (released in 2017) and glibc 2.28 (2018). For example, it gives access to birthtime, mount ID and subvolume ID.

🚀 Python 3.14 is out and so is 3.15 alpha! I chatted with @hugovk.dev, @pablogsal.com, and @lukasz.langa.pl about which release was the least successful, why release notes always say “and now for something completely different”, how Python actually gets released and many more! youtu.be/BHUWyM2cxwE

Forget* about Python 3.14, the cool kids are on 3.15.0a1! 🚀 🔬 Dedicated profiling package for Python profiling tools 💬 UTF-8 as default encoding 🌊 New C API to create bytes object ⚠️ Better error messages discuss.python.org/t/python-3-1... * Don't forget about 3.14 #Python #Python315 #release

64-bit Raspberry Pi is now supported as a Tier 3 platform 🫡🎉 peps.python.org/pep-0011/

🐍 CPython Core Dev Sprint 2025 wrap: ~50 core devs (yes, Guido too) and invited guests hacking in Cambridge. JIT, free-threading, C-API, endless side discussions. It's safe to say the best ideas start over coffee and a whiteboard with @python.org: community.arm.com/arm-communit...

🐍 Python 3.14 is here! 🎉 ✨ Template strings (t-strings) for safer string interpolation 🚀 Free-threaded Python officially supported (bye GIL!) 🎨 Syntax highlighting in the REPL 📦 Zstandard compression in stdlib 🔍 Remote PDB debugging Full release notes: docs.python.org/3.14/whatsne...

Just released! 🚀 Please install and enjoy Python 3.14! 🥧 discuss.python.org/t/python-3-1... #Python #Python314 #release

A campaign targeted GitHub Actions to steal PyPI tokens—PyPI wasn’t compromised and no PyPI packages were published by the attackers. Stay safe: review your tokens, rotate any exposed ones, and use short-lived, scoped GitHub Actions tokens. Details:

🐍🏃‍➡️ We kicked off the first day of the #Python #CoreSprint at Arm in Cambridge with lots of talks and lots of discussion about talks! Talks about the JIT, WASI, Pyodide PPI, cross-platform wheel builds, demo of new C API, precompiled binaries from python.org, PEP 793 and abi3/abi3t/abi4 discussion

🐍🏃‍➡️🏃‍➡️🏃‍➡️🏃‍➡️ #Python #CoreSprint day 4! Finally, 3.14.0rc3: next RM @savannah.dev joined in to watch the process and ask questions 🥧 Then a quick core․py recording with @pablogsal.com and @lukasz.langa.pl before heading up to Manchester for #PyConUK! 🐝 Thanks again to @diegor.it and Arm for hosting! 🦾

🐍🏃‍➡️🏃‍➡️ #Python #CoreSprint day 3! Lightning talks from Guido van Rossum, Ee Durbin, Steve Dower, Larry Hastings, Adam Turner & Greg Smith Carol Willing, Adam, Thomas Wouters, Petr Viktorin and I discussed a number of docs topics I released the Python Sphinx Docs Theme with more translations SC Q&A

🐍🏃‍➡️🏃‍➡️ #Python #CoreSprint day 2! @ixek.bsky.social gave a mentorship talk @gpshead.bsky.social gave a Claude demo Tania, @jezdez.dev, @willingc.bsky.social and I discussed the User Success WG We ended with punting on the Cam and dinner at Jesus College! @yhg1s.bsky.social ran Feuding Pythonistas.

Design an API can take time. This article describes the design of the C API to import and export Python integers. It takes place between August 2023 and December 2024. In total, the discussions got more than 448 messages! vstinner.github.io/pep-757-c-ap...

Our Python doc is officially out in the wild! 🐍 Thanks to everyone who joined the premiere 🙌 such a good vibe. Here’s the link so you can watch it on repeat youtu.be/GfH4QL4VqJ0

The Python documentary by @cultrepo.bsky.social is going to be debuting live on YouTube on Thursday the 28th at 7pm CET/10am PT! www.youtube.com/@cultrepo I'll share a link the day before to the doc that will have a countdown to the debut. I'm planning to be in the live chat during the debut.

The PSF has adopted pypistats.org, ensuring long-term stability while staying open source and community driven 🎉 Thank you to Christopher Flynn, for operating this awesome community service for 6+ years- and for continuing to maintain the project 💪🐍 pyfound.blogspot.com/2025/08/pypi...

#GitHubActions is dropping #Intel #macOS. #CPython has dropped it to tier 2. What does this mean? Not too much; we still support it, produce installers, CI failures block releases. We test with buildbots, and failures must be fixed within 24h, not immediately. discuss.python.org/t/dropping-i...

I'm *so* excited to share that I am now officially a CPython Core Developer! 🥳 I wrote my first Python in 2012, and immediately fell in love with the language. I'm honored that I am a part of, and can give back to, such an amazing, welcoming community! discuss.python.org/t/vote-to-pr...

Thanks to everyone for taking part in the #CPython sprint at #EuroPython2025! Across all CPython repos this weekend: * 122 PRs created (69 the previous weekend) * 79 PRs merged (65) * countless invaluable in-person discussions (a few?) #EuroPython #Python #sprint #Prague

✊️ Déjà 100 000 personnes ont signé la pétition en soutien au Palais de la Découverte, lancée à l'initiative du personnel du musée 🥳 Il doit réouvrir ! Cultivons la médiation scientifique et la science, si importantes dans le monde actuel ✊️ @sauvonslepdld.bsky.social www.change.org/p/sauvons-le...

Hey, did you know you can easily test Python 3.14 with the JIT enabled in official macOS and Windows binaries by setting PYTHON_JIT=1 as an env var? If you're not running in production, it might be fun to test it out? Would love to hear about your experience! docs.python.org/3.14/whatsne...

The Python Steering Council is pleased to announce that the Free-Threading project is no longer considered experimental! discuss.python.org/t/pep-779-cr...

Just released: Python 3.14.0 beta 3! 🚀🐍 🥧 Exceptionally new in b3: 🥧 Free-threaded Python is officially supported! (PEP 779) 🥧 Subinterpreters in the stdlib! (PEP 734) Do you maintain a Python package? Please test 3.14. discuss.python.org/t/python-3-1... #Python #CPython #Python314 #release

The trailer for "Python, the Documentary" is here! 🔥🐍 From its humble beginnings in the Netherlands to powering AI at the world’s biggest companies - this is the story of Python. 🎥 The film premiers at @europython.eu in July and will follow on our YouTube channel. Subscribe to stay updated!

There were layoffs at MS yesterday and 3 #Python core devs from the Faster CPython team were caught in them. If you know of any jobs, please send them their way: Eric Snow: www.linkedin.com/in/ericsnowc... Irit Katriel: www.linkedin.com/in/irit-katr... Mark Shannon: www.linkedin.com/in/mark-shan...

I had a great time yesterday at the #PyConUS language summit, so many interesting discussions and good work being done by so many people. Thanks to the attendees for engaging so well with my talk about Rust use within the Python ecosystem!

Photo with my old core dev friends. @vstinner.bsky.social and Erlend. #PyConUS

@thepsf.bsky.social Developers-in-Residence Program now has a landing page! 💜 Today we cover the language runtime and security work, maybe there's a gap in the #Python ecosystem your organization wants to see improved? Let's chat! #security #opensource #oss www.python.org/psf/develope...

ft-checker.com You can check that the top 1000 libraries at PyPI are installable at a free threading build. (Still needs improvement, and plan to check whether it passes the unit test)

"One highlight of submitting a PR to #Python is that their infrastructure has more CI coverage than we could possibly dream of: a complete build of Python runs over 50+ toolchains and architectures. The flipside? We discovered some pretty annoying corner cases." jonathan.protzenko.fr/2025/04/18/p...

Here's a good intro to Python 3.14's t-strings by @davepeck.org, one of the authors of PEP 750 davepeck.org/2025/04/11/p... #Python #Python314 #PEP750 #tstrings

For those who are interested in free-threaded Python (peps.python.org/pep-0703/), a few of us working on it have set up a new Discord server, for folks to ask questions a bit more interactively. (Lurking is also welcome! It's amazing how much you learn by osmosis.) discord.gg/rqgHCDqdRr #Python

Sending a big thank you to Arm for providing ARM GitHub Action runners to CPython ahead of the public preview launch today! github.blog/changelog/20... #python #cpython

Quarkslab audited PHP-SRC, the open source interpreter of PHP. The security audit, sponsored by @ostifofficial.bsky.social with funding from @sovereign.tech, aimed at strengthening the project's security ahead of the upcoming PHP 8.4 release. Here's what we found: blog.quarkslab.com/security-aud...

t-strings are coming! peps.python.org/pep-0750/ discuss.python.org/t/pep750-tem...

You get one guess for what I plan to talk about based on what I worked on for the last 4 years. 😅 And if you're curious who 1st-4th most prolific PEP authors are, it's: 1. Alyssa Coghlan (52) 2. Guido (49) 3. @pumpichank.bsky.social (41) 4. @vstinner.bsky.social (34) 5. me (32)

us.pycon.org/2025/events/... A lot of veereery interesting topics in this year Python Language Summit!!

BREAKING! Guido van Rossum, the legendary creator of #Python, has officially reinstated himself as Benevolent Dictator for Life (BDFL). Feat. Guido van Rossum, @pumpichank.bsky.social, @snarky.ca and @mariatta.ca‬ Stay tuned for the documentary coming this summer! www.youtube.com/watch?v=wgxB...

PEP 751 has been accepted! peps.python.org/pep-0751/ This means #Python now has a lock file standard that can act as an export target for tools that can create some sort of lock file. And for some tools the format can act as their primary lock file format as well instead of some proprietary format.

I wrote "PEP 782: Add PyBytesWriter C API": peps.python.org/pep-0782/ Add a new PyBytesWriter C API to create bytes objects. Soft deprecate PyBytes_FromStringAndSize(NULL, size) and _PyBytes_Resize() APIs. Join the discussion at: discuss.python.org/t/86617

GitHub Action now officially support the free-threaded CPython. hugovk.dev/blog/2025/fr...