Python Core Sprint 2025

I wrote a bit about what went on at the recent Python Core Sprint at #Arm in Cambridge, plus some bonus @pyconuk.org highlights.

hugovk.dev/blog/2025/py...

#Python #CoreSprint #PyConUK

The front of Cambridge railway station, seen from the top of a double decker.

[Forgot to press send on this two weeks ago...]

On my way to the Arm office in Cambridge for the Python core sprint! Exciting week ahead!
#Python #CoreSprint

Group photo of 50 core team members, triagers, special guests, and Arm hosts.

The 3.14 release room, two laptops on a table and the release CI build shown on a screen. The laptop with the "365 PARTYGIRL" sticker isn't mine.

🐍🏃‍➡️🏃‍➡️🏃‍➡️🏃‍➡️ #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! 🦾

Steve, Erlend, Victor and Petr chatting.

Guido presenting an aural history project.

Jacob's notepad: 1. Talk 2. Lunch 3. ??? 4. Beer

Steering Council Q&A: Greg, Pablo and Donghee on stools and Barry and Emily on screen.

🐍🏃‍➡️🏃‍➡️ #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

Tania presenting: not everyone needs mentorship. Coaching and sponsorship are different types of helping.

Greg with a squiggly hand-drawn graph.

Python people prepare to punt.

Thomas presenting his Feuding Pythonistas game in a grand hall to three long tables of the core team and friends.

🐍🏃‍➡️🏃‍➡️ #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.

Brett giving a talk to the core team

List of how far people travelled for the sprint.

Core team chatting over coffee.

Core team on the bus.

🐍🏃‍➡️ 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