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
Forget* Python 3.15 (don't forget it, please test!), the first PEP for Python 3.16 has been accepted: PEP 828 – Supporting ‘yield from’ in asynchronous generators, by Peter Bierma peps.python.org/pep-0828/ #Python #Python316 #PEP828
PEP 828 – Supporting ‘yield from’ in asynchronous generators | peps.python.org
This PEP introduces support for yield from in an asynchronous generator function:
peps.python.org
cibuildwheel 4.2.0 is out, with Python 3.15rc1 across all platforms, including pyemscripten for the first time on launch day! Time to build your binary wheels for 3.15! github.com/pypa/cibuild...
Release v4.2.0 · pypa/cibuildwheel
🌟 CPython 3.15 wheels are now built by default - without the "cpython-prerelease" enable set. It's time to build and upload these wheels to PyPI! This release includes CPython 3.15.0rc1, which is g...
github.com
Packaging 26.3 is out, with ranges (huge), PEP 808 support, and tons of fixes, improved performance, etc. github.com/pypa/packagi...
Release 26.3 · pypa/packaging
What's Changed Features Add a public VersionRange API and SpecifierSet.to_range(), representing the versions a specifier set accepts as an interval set that supports intersection, union, differenc...
github.com
🔒🐍 Coming soon, Python 3.15 release candidate 1! The 3.15 branch is now locked until 3.15.0 final in October. discuss.python.org/t/the-3-15-b... Also coming soon: Python 3.13.15 and 3.14.7. hugovk.dev/next-release/ #Python #Python315 #Python314 #Python314 #release
The 3.15 branch is locked for RC1
The 3.15 branch is now locked for all (except release managers and admins) until the 3.15.0 final release (scheduled for 2026-10-01). Reminder from the devguide: A branch preparing for an RC…
discuss.python.org
✍️ time-machine 3.3.0 is out, with Python 3.15 support, performance improvements, subinterpreter support, and various bug fixes. Check it out, and if you’re using freezegun, try the updated Migration CLI to convert and speed up your tests. adamj.eu/tech/2026/07... #Python
Python: time-machine 3.3.0 lets your tests time-travel even faster - Adam Johnson
time-machine is my library for mocking the current date and time in Python tests. I’ve just released version 3.3.0 with a decent number of changes, so here’s a lovely summary for you.
adamj.eu
"Python has decided to enable frame pointers by default and encourage the ecosystem to do so as well, to make debugging easier for us all, so time-machine is joining the party." Enabled by default for 3.15, do this for older versions: github.com/adamchainz/t... #Python
Build with frame pointers enabled by adamchainz · Pull Request #627 · adamchainz/time-machine
github.com
Adam Johnson@adamj.eu · 5d ago✍️ time-machine 3.3.0 is out, with Python 3.15 support, performance improvements, subinterpreter support, and various bug fixes. Check it out, and if you’re using freezegun, try the updated Migration CLI to convert and speed up your tests. adamj.eu/tech/2026/07... #Python
📢 The PSF is hiring! @python.org 🐍 We’re looking for a Security Developer. Help triage vulnerabilities in CPython, fight malware/supply-chain attacks on PyPI, and build tools to keep the #Python ecosystem safe for millions of users 🐍🔒 👉 Apply pythonsoftwarefoundation.applytojob.com/apply/ei03ut...
The Python Software Foundation is hiring a Security Developer. If you've got experience with Python, security, and collaborating with open source projects then we'd love to hear from you: jobs.pyfound.org/apply/ei03ut...
Security Developer - Python Software Foundation - Career Page
Apply to Security Developer at Python Software Foundation in Remote.
jobs.pyfound.org
🪟🦾🥈 Windows on Arm (aka aarch64-pc-windows-msvc) has now been promoted to tier 2 of CPython platform support. Tier 2 requires breaking changes to be fixed or reverted within 24 hours, and failures block a release. peps.python.org/pep-0011/ #Python #CPython #PEP11 #WindowsOnArm #Windows
PEP 11 – CPython platform support | peps.python.org
This PEP documents how an operating system (platform) becomes supported in CPython, what platforms are currently supported, and documents past support.
peps.python.org
Join us tomorrow for the first PSF D&I Workgroup Office Hours! 💜 Come chat about D&I, community, open source, accessibility, or whatever's on your mind. We'd love to meet you! When: 28 July, 1:00 PM UTC Where: PSF Discord · #psf-diversity discord.gg/m28Sz6gK6
Python Software Foundation@python.org · 4w agoThe PSF Diversity & Inclusion Workgroup is starting monthly office hours on the PSF Discord! Join us Tuesday, July 28 at 1 PM UTC in the psf-diversity channel to chat, ask questions, and share what you're working on 🐍🗺️
The PSF is hiring a Security Developer! Help triage vulnerabilities in CPython, fight malware/supply-chain attacks on PyPI, and build tools to keep the #Python ecosystem safe for millions of users 🐍🔒 This is a global, remote, 1 year term role, with the possibility of renewal. #Security Apply today:
Security Developer - Python Software Foundation - Career Page
Apply to Security Developer at Python Software Foundation in Remote.
pythonsoftwarefoundation.applytojob.com
Now we have pymanager for Windows, Python 3.16 drops the old MSI-based installer. Here's Steve Dower's +389 -17,781 PR! 🧹 github.com/python/cpyth... peps.python.org/pep-0773/ #Python #Python316 #pymanager #PEP773
gh-153511: Removes Tools/msi, Tools/nuget, and legacy py.exe launcher sources by zooba · Pull Request #153512 · python/cpython
Issue: Remove deprecated Windows installer #153511
github.com
Y'all, you should be so hyped up about Python 3.15, and specifically about lazy imports. I just merged a PR to move argparse to lazy imports for Python 3.16. On my machine, it reduces the median cumulative time for a bare `import argparse` by ~67%! github.com/python/cpyth...
GH-154638: Use lazy imports in argparse by savannahostrowski · Pull Request #154639 · python/cpython
Issue: Use lazy imports in argparse #154638
github.com
You can be a part of guiding the future direction of the PSF 🩵🐍💛 Nominate yourself or someone else for the PSF Board for the 2026 election! Nominations open Tuesday, July 28th, 2:00 pm UTC and close Tuesday, August 11th, 2:00 pm UTC. #python
Get Ready: PSF Board Nominations Opening Soon!
Who runs for the PSF Board? People who care about the Python community, who want to see it flourish and grow, and also have a few hours a month to attend regular meetings, serve on committees, participate in conversations, and promote the Python community. We're looking for candidates with a diverse range of skills and backgrounds, including leadership experience, fundraising knowledge, non-profit familiarity, and event organizing. Technical expertise, a record of collaboration, and experience speaking or teaching in the Python community are also all qualities we hope to see in Board members.Want to learn more about being on the PSF Board? Check out the following resources to learn more about the PSF, as well as what being a part of the PSF Board entails:
pyfound.blogspot.com
The initiative's backers say that "critical public services and data must be kept in the hands of Finnish and European actors”.
Citizens' initiative on securing critical digital services heading to Finnish Parliament
The initiative's backers say that "critical public services and data must be kept in the hands of Finnish and European actors”.
yle.fi
Welcome @kushaldas.se back to the Python Security Response Team! devguide.python.org/security/psrt/ With PEP 811, we have a much clearer process for PSRT membership. peps.python.org/pep-0811/ Thanks to Kushal and the PSRT for keeping #Python secure. hugovk.dev/blog/2026/se... #security #PSRT
Python Security Response Team (PSRT)
The Python Security Response Team (PSRT) is responsible for handling vulnerability reports for CPython and pip. To report security issues: https://www.python.org/dev/security/ Members: The PSRT pub...
devguide.python.org
It was to be expected, but I need to stress how much #EuroPython benefitted from being the host of the CPython Core Summit this year. As I keep repeating, the main value of #PyConUS for the COMMUNITY is the gathering of stakeholders for in-person exchange. 1/2
Python strftime/strptime Cheat Sheet: An interactive reference inventwithpython.com/strftime/
Python strftime/strptime Directive Cheat Sheet
Interactive cheat sheet for Python's strftime and strptime format directives.
inventwithpython.com
Core Dispatch 8 is live! We've got the latest 3.15 beta out (released with love from #EuroPython 💛), a bunch of lively PEP discussions, and a very unhinged "One More Thing" this time. Check it out 👇 coredispatch.xyz/editions/8
Core Dispatch #8
Welcome back to Core Dispatch! This edition covers July 5 through July 18, 2026. Python 3.15.0 beta 4 landed today, July 18 (we just released it at the…
coredispatch.xyz
"We're just normal men" -- @lukasz.langa.pl, with @pablogsal.com interviewing Guido at #EuroPython. #Python #CorePy
I wrote about how, like many other open-source projects, CPython is experiencing a huge increase in security reports. Charts inside! hugovk.dev/blog/2026/se... #Python #security #OpenSource
Security: line goes up
hugovk.dev
🇫🇮 Finnish: Kreivi Roskisnaama www.hs.fi/kirjeenvaiht...
Britannia | Vaaleissa on ehdolla mies, joka esiintyy aina roskakori päässään – ”Tietää itsekin olevansa vitsi”
Britit ovat tehneet satiirista osan kansallista identiteettiään. Vaalien aikaan se näkyy tavassa, jolla poliittiset turhaumat tiivistyvät vitsiehdokkaiksi.
hs.fi
Josiah Mortimer@josiahmortimer.bsky.social · 4w agoRounding up some translations of Count Binface that have been appearing in foreign press 🇷🇴 Romanian: Contele Tomberonez 🇫🇷 French: Comte Tête-de-Poubelle (bin-head, more accurate than bin-face) 🇮🇹 Italian: Conte Faccia-da-Bidone 🇪🇸 Spanish: "un hombre con un cubo de basura en la cabeza" (!) Cont...
The PSF Diversity & Inclusion Workgroup is starting monthly office hours on the PSF Discord! Join us Tuesday, July 28 at 1 PM UTC in the psf-diversity channel to chat, ask questions, and share what you're working on 🐍🗺️
The PSF D&I Workgroup Are Starting Office Hours in July!
Doing diversity and inclusion work in tech can feel isolating sometimes. You might be organizing a meetup, writing a code of conduct, trying to get funding for your community, or helping people feel welcome, often in your spare time, and wondering if anyone else is wrestling with the same things.
pyfound.blogspot.com
the bots I'm currently running on bluesky: - @pomological.xor.blue: old fruit watercolors - @roadside.xor.blue: roadside photos from the 70s, 80s, 90s by john margolies - @choochoo.xor.blue: tiny emoji trainscapes (with real nyc weather!) - @helpingfriendly.xor.blue: phish setlist data in real time
How I fixed the dictionary with Python 3.14: hugovk.dev/blog/2026/fi... #python #python314 #dictionary #release #pi
Fixing the dictionary with Python 3.14
hugovk.dev
New #Pillow release! 🛞 Wheels for Python 3.15 beta 🧾 An SBOM in all the wheels 🚅 Performance improvements thanks to @akx 🔒 Security fixes ❌ No longer a wheel for experimental free-threaded 3.13 pillow.readthedocs.io/en/latest/re... #Python #Pillow #PythonPillow #release #security #Python315 #SBOM
12.3.0 (2026-07-01)
Security: CVE 2026-59200: Prevent decompression bomb when parsing PDF: When parsing a PDF, PdfStream.decode() attempts to decompress data without any limit. A default maximum of ImageFile.SAFEBLOCK...
pillow.readthedocs.io
