Upgrades

• CPython 3.10.19 -> 3.10.20
• CPython 3.11.14 -> 3.11.15
• CPython 3.12.12 -> 3.12.13

Distribution changes

• The path to the Tcl library is propagated via an environment variable rather than an tcl interpreter variable to avoid issues when sys.stdin is redirected.

Build system changes

• Releases are made available on Astral's mirror.
• Bash scripts were refined to remove the use of backticks and quote all variables.

Full Changelog: 2026021...2026030

Upgrades

• CPython 3.15.0a5 -> 3.15.0a6
• pip 26.0 -> 26.0.1

Distribution changes

• Python 3.15 on Windows is built with tail-calling for improved performance.
• multiprocessing.Queue.qsize is now implemented on cross-compiled Linux distributions.

Full Changelog: 2026020...2026021

Upgrades

• CPython 3.14.2 -> 3.14.3
• CPython 3.13.11 -> 3.13.12
• pip 25.3 -> 26.0

Build system changes

• Action added to allow publishing version metadata to another repository for future use in uv.

Full Changelog: 2026012...2026020

Upgrades

• OpenSSL 3.5.4 -> 3.5.5

Distribution changes

• Fix int types in _tkinter for Python 3.10 (likely no user-visible change)

Build system changes

• Add the ability to run the build process with Visual Studio 2026
• Add the ability to run the build process with Python 3.14+ (remove dangling symlinks in the internal archive of bzip2)

Full Changelog: 2026011...2026012

Upgrades

• CPython 3.15.0a4 -> 3.15.0a5

Full Changelog: 2026011...2026011

Upgrades

• CPython 3.15.0a3 -> 3.15.0a4
• Tcl/Tk 8.6.14 -> 9.0.3

Note: the change to the Tcl/Tk version also includes a changes to the name of the dynamic libraries included in the distribution, e.g. libtcl8.6.so -> libtcl9.0.so.

Full Changelog: 2025121...2026011

Upgrades

• CPython 3.15.0a2 -> 3.15.0a3

Build system changes

• The script used to start the build is now named build.py use, uv run build.py ... to start a build on all platforms.
• LLVM 21 is used to build all distribution, including those which target musl.

Distribution changes

• The startup logic (getpath) to better locate the install when invoked with an incorrect argv[0] was expanded to Python 3.11+

Full Changelog: 2025120...2025121

Distribution changes

• Correctly set install_name for macOS libpython
• Fix dropped tcl/tk patch on Python 3.14+

Full Changelog: 2025120...2025120

Upgrades

• CPython 3.13.10 -> 3.13.11
• CPython 3.14.1 -> 3.14.2

Distribution changes

• Patch Python startup logic (getpath) to better locate the install when invoked through a symlink or incorrect argv[0] (#896)

Full Changelog: 2025120...2025120

Upgrades

• CPython 3.13.9 -> 3.13.10
• CPython 3.14.0 -> 3.14.1

Build system changes

• Linux aarch64 targets can be built on macOS using Docker
• uv can be used to bootstrap the build using ./build-uv.py. Existing pip-based bootstrapping will be removed in a future release.

Full Changelog: 2025112...2025120