Core Dispatch #10

Welcome back to Core Dispatch! This edition covers August 5 through August 27, 2026. Python 3.12.14, 3.11.16, and 3.10.21 shipped on August 12. Next up is Python 3.15.0 release candidate 2, due September 1.

There are five new PEPs to catch up on. PEP 805 proposes a model for safe parallel Python. PEP 843 and PEP 844 offer two approaches to explicit module exports. PEP 841 proposes syntax for frozen types, while PEP 839 adds C APIs for building immutable collections. PEP 833 also reached Final, freezing the HTML form of the simple repository API. HTML support stays, but future standards work moves to JSON. Speaking of PEPs, PEP 11 was also updated to list RISC-V as a tier 3 platform.

Many core team members spoke about Python core development at EuroPython this year. All nine talks are in this edition's Core Team Musings, covering the CPython ABI, the JIT, free-threading, interpreter internals, security, and contributing to Python. Voters can also catch up on nominee AMAs for the PSF Board and inaugural Python Packaging Council elections before ballots open on September 1.

Python 3.15 is in the release candidate phase, so this is the moment for maintainers to test their projects and publish Python 3.15 wheels to PyPI. Wheels built against the 3.15 release candidates will work with future 3.15 releases, and publishing them now helps downstream projects test too. Please file any CPython issues you find.