Hugo van Kemenade

I made a Python core team starter pack: go.bsky.app/AgFvebt Let me know if I've missed anyone! #Python #CPython #PythonCoreTeam #StarterPack

I was a guest on the @realpython.com podcast to talk about #security and #Python 🐍🛡️ Thanks @digiglean.bsky.social for having me on the show! realpython.com/podcasts/rpp... (recorded before cybersecurity awareness month hit its full stride this week…)

On macOS, Mole can clear out your .venv and venv dirs, in case you have old certifi. github.com/tw93/mole#pu... $ brew install mole $ mo purge ... Estimated space freed: 13.33GB | Items: 399 It also cleans out things like .tox .ruff_cache node_modules #Python #Mole #venv #certifi #eMudhra #macOS

In response to the eMudhra / emSign certificate security incident we've published guidance for Python users to update CA certificates: discuss.python.org/t/informatio... #security #Python #pki

Please upgrade certifi in all Python applications to the latest version (2026.10.19) following emSign CA certificate security incident: github.com/certifi/pyth... #security #python #vulnerability

Do you prefer reading Python 3.15 livetoot threads in blogpost form? Good news! hugovk.dev/blog/2026/re... #Python #Python315 #release

I don't know what you're doing on the first Tuesday of even months for the next two years, but I've just planned out mine: peps.python.org/pep-0790/#bu... You can add Python releases to your calendar with this iCal: peps.python.org/api/#release... #Python #Python315 #PEP790

If you're in Helsinki this Thursday (Oct. 22), I highly recommend you catch the screening of "Ghost in the Machine" at Cinema Orion. It is an excellent documentary and it shows what's really going on behind AI. cinemaorion.fi/elokuvat/gho...

✍️ New post on using @hugovk.dev’s norwegianblue tool to check end-of-life dates relevant to Django developers. adamj.eu/tech/2026/10... #Django #Python

If you're on Letterboxd and keeping score, you can find the Python 3.16 Film Festival films in this list! letterboxd.com/seaquenched/...

Everyone say a hearty "Hello World" to the beginnings of Python 3.16! Python 3.16 comes paired with a film festival! You can read more about this release's pairing in the "And now for something completely different" section of the blog 🐀 🧀 blog.python.org/2026/10/pyth...

As the release manager for 3.16, it's also my duty to inform you that 3.16 alpha 1 is slated for this coming Tuesday!!!

🐍🎧 Python 3.15: Exploring the New Features Python 3.15 is here! Christopher Trudeau and Bartosz Zaczyński return to discuss the new version. realpython.com/podcasts/rpp...

Python 3.15 is OUT 🐍🚀 Lazy imports, Tachyon in the stdlib, frame pointers on by default, frozendict, better error messages... this one is LOADED 🔥🔥🔥 Go upgrade 🤘 discuss.python.org/t/python-3-1...

Python Tip #283 (of 365): Delay slow imports until they're needed. 🧵 #Python #DailyPythonTip

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.

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...

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

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!

Python 3.15.0 release day thread over on Mastodon: mastodon.social/@hugovk/1174... #Python #Python315 #release

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

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...

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...

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 1/

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

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/

✍️ New post on finding big files with Zsh’s glob qualifiers adamj.eu/tech/2026/09... #Zsh

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 security@python.org so we can alert others if needed. #python #security

Python Tip #257 (of 365): Consider "import datetime as dt". 🧵 The fact that the datetime module and the datetime class are spelled the same way is VERY confusing. #Python #DailyPythonTip

📣📣 ATTN PSF Voting Members: The 2026 PSF Board election vote closes tomorrow, September 15th- but don't wait, go vote today! If you affirmed your intention to vote in this year's election or voted last year, check your email for voting instructions 🗳️ #Python pyfound.blogspot.com/2026/09/the-...

We're deprecating the IM ("IFUNC Image Memory") plugin from @pillow.fosstodon.org.ap.brid.gy, with a two-year deprecation rather than the usual one-year. pillow.readthedocs.io/en/latest/de... More info: mastodon.social/@hugovk/1172... #Python #Pillow #PythonPillow #deprecation

🗳️ I've voted in @ThePSF@fosstodon.org board election! 🗳️ And in the inaugural Packaging Council election! 🗳️ Remember to vote! #Python #PSF #election #packaging #PackagingCouncil #vote

📣📣 ATTN PSF Voting Members: The inaugural Python Packaging Council election vote closes next Tuesday, September 15th- but don't wait, go vote today! If you affirmed your intention to vote, check your email for voting instructions 🗳️ #Python pyfound.blogspot.com/2026/09/inau...

Do you know your regular expressions in Python? Do you know the unusual thing re.match() does? Or what soft deprecation is? I've written about the changes coming up in Python 3.15 to help clear things up a bit. hugovk.dev/blog/2026/so... #Python #python315 #SoftDeprecation #regex

I wrote up a #PyPI incident report for some install-time issues experienced a few of weeks ago by some users, and what was changed. blog.pypi.org/posts/2026-0...

Maintain an open source project? YOU can help test the next release of Python. It is really helpful to catch bugs and other issues before we release!

Here's how to join the cool testers' club! 😎 hugovk.dev/blog/2026/he... #Python #Python315 #GitHub #GitHubActions

We've added an AI policy to the @stronglang.bsky.social blog: stronglang.wordpress.com/ai-policy/

Core Dispatch #10 is out! 🐍 This edition, we’ve got five new PEPs, RISC-V joining CPython’s tier 3 platforms, PSF Board and Packaging Council nominee AMAs, and nine EuroPython talks on Python core development! coredispatch.xyz/editions/10

🇪🇺🐍📽️ The EuroPython videos are all out! www.youtube.com/playlist?lis... Reply with your picks and let's build a thread of recommendations! #EuroPython #PyCon #Python

🐍🇰🇷🏃‍♂️ Thanks to all the sprinters for contributing to #CPython, and to @corona10.bsky.social for running this with me! #PyConKorea #PyConKorea2026 #PyConKR #PyConKR2026 #MakeItHappy #PyCon #Python