Core Dispatch #5

Welcome back to Core Dispatch! This edition covers May 18 through June 4, 2026. As promised, Python 3.15.0 beta 2 landed on June 2. Two more milestones are close behind: 3.13.14 and 3.14.6 on June 9, followed by 3.15.0 beta 3 on June 23.

There's also a healthy batch of changes landing for 3.15: an O(n^2) blowup in unicodedata.normalize() was fixed, the XML parser gained support for multi-byte encodings, and a round of deprecation warnings went in for the ast module and abc's abstractclassmethod/abstractstaticmethod/abstractproperty.

On the project side, the Python Security Response Team (PSRT) landed an initial Python security policy in the Devguide, giving the vulnerability reporting and response process a documented home. And dev builds of 3.15+ now report a version like 3.15.0b2+dev instead of the old bare-plus 3.15.0b2+, which wasn't PEP 440-compliant.

Looking ahead, the EuroPython 2026 Language Summit topics are out, with a lineup spanning a Rust-for-CPython roadmap, the future of free-threading, garbage collection, and the buffer protocol.

If you're interested in CPython internals, Victor Stinner has a great writeup on free threading internals and reference counting that's well worth your time.

As always, if you maintain a package or just like living on the edge, give the latest 3.15 beta a spin and file any issues you find.