Announcing the 17 nominees for the inaugural Python Packaging Council election, and how to vote in the election.

What's Changed Features Add a public VersionRange API and SpecifierSet.to_range(), representing the versions a specifier set accepts as an interval set that supports intersection, union, differenc...

🌟 CPython 3.15 wheels are now built by default - without the "cpython-prerelease" enable set. It's time to build and upload these wheels to PyPI! This release includes CPython 3.15.0rc1, which is g...

Scikit-build-core 1.0, the culmination of a four year project to build the best compiled code backend for Python, is out. It’s a huge release, with over 90 bugs fixed, over 40 new features, accounting...

Fable came out and then disappeared a couple of days later. In that short time, I managed to run a lot of repository reviews with it, and was really happy with the results. I’ve found and fixed around...

cibuildwheel 4.0.0 is out, with some very big additions. We’ve added pyemscripten 3.13 wheels (uploadable to PyPI!), Python 3.15 (and 3.15t) betas, and much more! We’ve got a new stage: audit, which a...

Scientific Installation & Modern Packaging for Language Extensions in Python

Python 3.15 beta 1 is out! This is a really impactful release, with some really big additions. A new lazy import system, a powerful sampling profiler, not one but two new builtins, the usual color/typ...

AI suddenly passed the “more time saved than spent” point around December 2025. A little late, I’ve finally started using agentic AI in various places over the last 2-3 months, and wanted to jot down ...

What's Changed Fixes: Fix incorrect sysconfig var name for pyemscripten by @ryanking13 in #1160 Make Version, Specifier, SpecifierSet, Tag, Marker, and Requirement pickle-safe and backward-compati...

Features: PEP 783: add handling for Emscripten wheel tags by @hoodmane in #804 PEP 803: add handling for the abi3.abi3t free-threading tag by @ngoldbaum in #1099 PEP 723: add packaging.dependency_...

This release drops Python 3.8 and adds a --usage command for full docstrings. Our .nox dir is now ignored by default, virtualenvs are recreated if symlinks are broken (such as after a Python upgrad...

Read about the performance improvements here: https://iscinumpy.dev/post/packaging-faster. What's Changed Features: PEP 751: support pylock by @sbidoul in #900 PEP 794: import name metadata by @br...

Along with a pip (and now packaging) maintainer, Damian Shaw, I have been working on making packaging, the library behind almost all packaging related tools, faster at reading versions and specifiers,...

After two years of Advent of Code in Rust, I thought I’d try TypeScript. I’ve always wanted to improve repo-review’s webapp, and that requires knowledge of the packaging systems for JavaScript, so I t...

This PEP relaxes the constraint on dynamic metadata listed in the [project] section in pyproject.toml to allow the static portion of mixed metadata to be defined in the normal location if the field is...

🐛 Fix an incompatibility with Docker v29 (#2660) ✨ Adds test-runtime option, to customise how tests on simulated/emulated environments are run (#2636) ✨ Adds support for new manylinux_2_35 images o...

UHI 1.0 is out, with a major new feature: a new histogram serialization spec! This spec supports multiple formats (HDF5, zip, and JSON initially), and can be supported by multiple libraries (Boost-his...

✨ Add a --clean-cache command to clean up our cache (#2489) 🛠 Update Python to 3.14rc2 and other patch version bumps (#2542, #2556) 🛠 Update Pyodide to 0.28.2 (#2562, #2558) 🐛 Fix resolution with p...

🌟 CPython 3.14 wheels are now built by default - without the "cpython-prerelease" enable set. It's time to build and upload these wheels to PyPI! This release includes CPython 3.14.0rc1, which is g...

Pybind11 3.0 has been released! I would like to highlight some of the key changes below; be sure to check out the changelog and upgrade guide for more information! This release includes an ABI bump, t...

Python π (3.14) beta 3 is out, which means the features are locked in (normally beta 1, but two additions were made exceptionally in beta 3!). The big feature this time around is template strings. The...

cibuildwheel 3.0.0 is out, with some very big additions. We’ve added GraalPy, Python 3.14 (and 3.14t) betas, and iOS support! We’ve got several new options: test-sources, test-environment, and (experi...

Python π (3.14) beta 1 is out, which means the features are locked in.

This guide is maintained by the scientific Python community for the benefit of fellow scientists and research software engineers.

CMake is an open-source, cross-platform family of tools designed to build, test and package software

This version adds support for PEP 639 (license expressions) and updates the default METADATA version 2.2. Support for Python 3.7 has been removed. You can use build.requires to inject build require...

This version add a new formatter with improved control capabilities and output aligned with standards for help output. It also add a modifier to enable use of non-standard option names. Along with ...

This guide is maintained by the scientific Python community for the benefit of fellow scientists and research software engineers.

🌟 Added a new CIBW_ENABLE/enable feature that replaces CIBW_FREETHREADED_SUPPORT/free-threaded-support and CIBW_PRERELEASE_PYTHONS with a system that supports both. In cibuildwheel 3, this will als...