Hugo van Kemenade

@hugovk.dev

Python 3.14 & 3.15 release manager, core developer, Sovereign Tech Fellow, PSF Fellow, open-source maintainer, PEP editor, NaNoGenMo organiser, winter bicycler

@trey.io Oct 10, 2026, 2:48 PMReposted by @hugovk.dev

Python Tip #283 (of 365):

Delay slow imports until they're needed. 🧵

#Python #DailyPythonTip

@vstinner.bsky.social Oct 10, 2026, 7:20 PMReposted by @hugovk.dev

My recent work on PyBytesWriter and PyUnicodeWriter C API, bugfixes, optimizations, and documentation changes: vstinner.github.io/optimize-pyb... PyBytesWriter is now 1.28x faster than Python 3.15 and PyUnicodeWriter can avoid memory copies. Detect buffer overflow in debug mode.

Painting: Luxe, Calme et Volupté (1904), by Henri Matisse.

@savannah.dev Oct 9, 2026, 4:19 PMReposted by @hugovk.dev

Happy Python 3.15 final day!

May you all go forth and profile and lazy import and use frame pointers everywhere!*

*please read the What's New, release too stacked 🏎️
docs.python.org/3.15/whatsne...

@coredispatch.xyz Oct 9, 2026, 9:58 PMReposted by @hugovk.dev

It’s been a while, but Core Dispatch 11 is out!

Happy Python 3.15 final day to all that celebrate! Congrats to @hugovk.dev on getting the release across the finish line! 🎉

Catch up on what’s been happening in CPython:
coredispatch.xyz/editions/11

@hugovk.dev Oct 9, 2026, 2:32 PM

🐍🚀 Out now: Python 3.15.0 final!

💤 Lazy imports!
🧊 frozendict builtin!
💂 sentinel builtin!
📉 Tachyon profiler!
🗣️ UTF-8 by default!
🛞 abi3t!
🎨 More colour!
🚌 & more!

discuss.python.org/t/python-3-1...

Huge thanks @sovereign.tech for supporting my work as RM!

#Python #Python315 #CPython #release

@mathspp.com Oct 9, 2026, 12:34 PMReposted by @hugovk.dev

It's happening! And to celebrate (?) I'm spending the next 15 days writing about Python 3.15 In a couple of hours I'll be sharing what I think are some of the most exciting new features of 3.15. See you in a bit!

@hugovk.dev Oct 9, 2026, 11:10 AM

Python 3.15.0 release day thread over on Mastodon:

mastodon.social/@hugovk/1174...

#Python #Python315 #release

@hugovk.dev Oct 2, 2026, 9:51 PM

🐍🚀 Out now

Security releases
Python 3.10: last ever release!
Python 3.11
Python 3.12
Python 3.13: last bugfix release with installers
Python 3.14
discuss.python.org/t/python-3-1...

And Python 3.15 rc3
Final coming next week!
discuss.python.org/t/python-3-1...
#Python #Python315 #Python314 #release

@sethmlarson.dev Oct 1, 2026, 12:40 PMReposted by @hugovk.dev

Time to upgrade your #Python versions! 🐍🛡️

3.14.8, 3.13.16, 3.12.15, 3.11.17, and 3.10.22 were just published and contain significant security fixes (8 CVEs) including 1 critical and 2 high severity fixes. Thanks to the PSRT and RMs for coordinating.

blog.python.org/2026/10/pyth...

#security

@vstinner.bsky.social Oct 1, 2026, 6:02 PMReposted by @hugovk.dev

I just optimized PyFloat_PackN() C functions in Python using __builtin_bswapN() to swap bytes. Problem: GCC does crash and clang miscompiles the 16-bit function which uses _Float16 on IBM s390x! GCC bug report: bugzilla.redhat.com/show_bug.cgi... clang bug report: github.com/llvm/llvm-pr...

@sethmlarson.dev Sep 30, 2026, 1:33 PMReposted by @hugovk.dev

I've just published 10 blog posts detailing the #Python Language Summit 2026. The Language Summit was held in Kraków, Poland and included discussions about free-threading, #Rust, garbage collectors, and type annotations.

Please enjoy and thank you for your patience:

blog.python.org/2026/09/lang...

Group photo of the attendees of the 2026 Python Language Summit. Notably, Larry Hastings is laying flat on the ground with his eyes closed.

@hugovk.dev Sep 29, 2026, 5:04 PM

🐍🚀 Out now

pepotron
Open PEPs like `pep 745 790`
github.com/hugovk/pepot...

linktron
Read clipboard if no input
github.com/hugovk/linko...

norwegianblue
Cycle name in EOL colour
github.com/hugovk/norwe...

pylast
Only retry transient net failures
github.com/pylast/pylas...

all: Drop #Python 3.10

@sovereign.tech Sep 28, 2026, 2:52 PMReposted by @hugovk.dev

Reminder: We're currently hiring for several roles across the team. Join the Sovereign Tech Agency and help shape the digital infrastructure of the 21st century:

#Hiring #OpenSource #PublicInterestTech #DigitalSovereignty

A recruitment graphic for Sovereign Tech Agency featuring a group of people sitting together in a workshop or meeting. The headline reads “We’re hiring!” and the bottom text says “Sovereign Tech Agency” and “Join our team!”

@hugovk.dev Sep 28, 2026, 3:11 PM

It's a change in how PyPI is counting downloads, they're no longer including the .metadata file counts:

blog.pypi.org/posts/2026-0...

@realpython.com Sep 25, 2026, 1:20 AMReposted by @hugovk.dev

🐍📩 frozendict, pytest Plugins, re.prefixmatch(), and More at Pycoders Weekly Issue 753 pycoders.com/issues/753

@fry69.dev Sep 22, 2026, 6:34 PMReposted by @hugovk.dev

PSA: Next week Python 3.15 comes out.

This means Python 3.13 will stop receiving bug fixes and end of October this year Python 3.10 will be EOL, Python 3.11 will have one more year until EOL, etc.

See -> devguide.python.org/versions/

Python version overview September 2026 (Python 3.15 release)

@hugovk.dev Sep 22, 2026, 6:19 PM

One week until Python 3.15.0 final!!
hugovk.dev/next-release/

What are you most looking forward to?
docs.python.org/3.15/whatsne...

#Python #python315

@adamj.eu Sep 21, 2026, 8:55 PMReposted by @hugovk.dev

✍️ New post on finding big files with Zsh’s glob qualifiers

adamj.eu/tech/2026/09...

#Zsh

@sethmlarson.dev Sep 17, 2026, 9:13 PMReposted by @hugovk.dev

The lovely folks from @rust-lang.org pinged me in a mutual security discussion channels about these ongoing attacks:

There's no reason attackers wouldn't do the same to maintainers of Python projects. Report weirdness to [email protected] so we can alert others if needed.

#python #security

@hugovk.dev Sep 17, 2026, 9:32 PM

Two weeks until Python 3.15.0 final!
hugovk.dev/next-release/
#Python #python315

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