Victor Stinner 🐍

New interview: Brett Cannon. gvanrossum.github.io/interviews/ind… Now with RSS feed!

Please welcome PEP 827 -- the result of a year-long research into what would it take to uplift Python's type checking to match its dynamism. peps.python.org/pep-0827/

⏰ New PEP alarm! ⏰ Limitations in software engineering are meant to be broken. For years I was bothered with the gap between Python and TypeScript: one has incredibly dynamic and powerful runtime, the other has incredibly dynamic and powerful type system. So why not both? 🔥

New blog post: Interview with Python core developer Thomas Wouters about Python's old times. The first in a planned series of such interviews. gvanrossum.github.io/interviews/Tho…

I've finally updated my home page: not only does it look a little less like a relic from the previous century, but I've also scraped by various blog posts and put them in the same GitHub repo. gvanrossum.github.io or python.org/~guido. All thanks to Claude Opus 4.6.

Happy 25th anniversary to the PSF! 🎉 That's a quarter century of the PSF supporting #Python and its community to grow, build, & change the world. Thank you to our community for making it all possible, we're grateful to be in community with each and every one of you- for the next 25 years & beyond!

I am very happy to share that PEP 814 is accepted. Huge kudos to @VictorStinner for driving this PEP from the start! discuss.python.org/t/pep-814-add-…

2025 was another eventful year for PyPI! Critical security enhancements, powerful new org features, a better overall user experience, and transparent security incident response 🎉👏 Thank you, PyPI team & community! Learn more on our blog: blog.pypi.org/posts/2025-12-…

I have released new psutil 7.2.0, which includes 2 new APIs to inspect C heap memory allocations. I have also released a new tool called psleak, which detects memory leaks in C extension modules. gmpy.dev/blog/2025/psut… github.com/giampaolo/psle…

I wrote a new PEP with Donghee Na (@dongheena92): "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.

🎙️ 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! creators.spotify.com/pod/profile/co…

Wheels for free-threaded Python now available in psutil. Here's a blogpost explaining what it means: gmpy.dev/blog/2025/whee…

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-pybyte…

@Th_Th_ I don't know the agenda of other operating systems.

@VictorStinner For the moment, or definitely?

The future Python 3.15 just got a new os.statx() function thanks to Jeffrey Bosboom! Documentation: #os.statx" target="_blank" rel="nofollow noopener">docs.python.org/dev/library/os… 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.

@Th_Th_ No, the statx() function is only available on Linux.

@VictorStinner Is it portable on other OS'es?

🐍 Throwback to last month’s CPython Core Dev Sprint 2025 at our HQ in Cambridge. 50+ core devs (yes, including Guido 👀) and guests spent 5 days hacking on CPython: think working with JIT, free-threading, C-API and more. Thanks to @ThePSF + everyone who joined: okt.to/s6iFY4

Last month the CPython Core Dev Sprint 2025 took place at @Arm Cambridge. 🔧 I’ve just published a full write-up on what happened, what went into organising it, and what it means for Arm & the Python community. 👉 Read it here: community.arm.com/arm-community-…

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