As we close the books on PyCon US 2025, we can’t express enough gratitude to everyone who joined us in Pittsburgh, PA, and made our 9 days t...

pip-tools keeps your pinned dependencies fresh.

Larry Hastings led a moment of silence to remember former core developer Michael Foord, who passed away earlier this year. Michael was known for many things, including “starting the tradition of having the Language Summit events at PyCon”. You can read the memorial for Michael Foord on discuss.python.org.

The final talk presented at the Language Summit was given by Hood Chatham, who maintains the Pyodide project and is trying to make fetch() happen for Python (among many other JavaScript APIs).

“This talk is very timely, Rust turns 10 years old tomorrow”. David Hewitt is the maintainer of PyO3, a library that allows Python developers to more easily use Rust within a Python project. “It takes time for languages to be adopted, the test is whether a decade later the language is used”. David noted that Rust had already been mentioned multiple times earlier in the Language Summit, but also in “the Python Software Foundation’s RFI response to the US government about memory safety” regarding creating binary extensions.

Russell Keith-Magee and Malcolm Smith were at the Language Summit this year to announce the status of mobile support for Python: “After many years, this year I can say that [Python on mobile] is there!” Russell proudly declared, with a large round of applause from the room.

PEP 772 proposes a Packaging Governance Process through a new Python Packaging Council of 5 members (similar to the Python Steering Council). The entire project is a collaboration between Barry Warsaw, Pradyun Gedam, and Python Software Foundation Executive Director Deb Nicholson.

Core developer and Python Docs Editorial Board member Mariatta presented an update on the Python Docs Editorial Board to the Language Summit. Mariatta credited her fellow board members Carol Willing, Guido van Rossum, Joanna Jablonski, and Ned Batchelder for putting together the presentation.

Eric Snow opened his presentation about the Python Steering Council with an appreciation of current and former Steering Council members and all their hard work, which was met with applause from Language Summit attendees. “... and the same goes for Guido, who took 5 people to replace”.

Tobias Wrigstad, Matthew Parkinson, and Fridtjof Stoldt attended their first Python Language Summit to talk about some new concurrency concepts with core developers. Their slides have great diagrams, so I recommend checking them out. Tobias delivered the presentation to core developers, opening with a “potentially contentious statement” that “[data races and concurrency bugs] were the future that free-threaded Python programmers would see if free-threading was adopted for Python programs”.

“Does it make sense to move to the next phase of PEP 703?”, core developer Matt Page opened his presentation to the Language Summit. Free-Threaded Python has come far since the last Language Summit, where Daniele Parmeggiani presented on free-threaded Python using the then-newly-added “--disable-gil” option.