pipdeptree 4 is now out - the engine is a complete rewrite in Rust, so it's much faster on small but especially large environments; see github.com/tox-dev/pipd... 😀 #python #oss

✨ feat(rust): replace the Python engine with a Rust extension by gaborbernat · Pull Request #618 · tox-dev/pipdeptree

One Rust extension discovers distributions, parses metadata, constructs the dependency graph, and renders the result. Those stages account for most CLI runtime in pipdeptree. The public Python API ...

github.com

turbohtml 1.0 is out! 🎉 A fully typed HTML toolkit for Python with a C core — parse, query, sanitize, serialize, extract, ~2-5x faster than lxml ⚡️ Wheels for 3.10-3.15, free-threading too. Try it & tell me what breaks 🐍 turbohtml.readthedocs.io

🌳 pipdeptree 3.0 is out. New: render a dependency tree straight from PyPI (needs index extra) or a PEP 751 lockfile without installing anything, render it in a Jupyter notebook, and see extras by default. Try it 👉 pipdeptree.readthedocs.io/en/latest/tu...

One formatter for your whole pyproject.toml. pyproject-fmt v2.22 formats the [tool.*] config for 30+ tools, from poetry and hatch to mypy, pytest, tox, black, and pylint. It orders keys and sorts arrays, so those tables stop churning in review. pyproject-fmt.readthedocs.io/en/latest/fo...

At PyCon US 2026 🐍 one of the standout talks for me was Larry Hastings on testing multithreaded code 🧵 via blanket. Dug deeper into the topic afterwards and wrote it up. Free-threaded Python is around the corner ⚡ so will become ever more important: bernat.tech/posts/blanke...

Deterministic Multithreaded Testing in Python with blanket

How blanket gives Python tests deterministic control over thread scheduling, and why that matters now that free-threaded Python is shipping.

bernat.tech

@miketheman.com and @sethmlarson.dev share some of the accomplishments of the PSF security team this year. That’s a lot of work for two people! And shoutout to the sponsors who make it possible to fund their roles.

Just published my notes from this year's Python Packaging Summit at PyCon US. If you've ever been curious what one of these is like from the inside: Wheel 2.0 + Zstandard, PyPI abuse vectors, conda vs pip, nab as a pip-resolver candidate. 🐍📦 bernat.tech/posts/pycon-... #PyConUS

PyCon US 2026 Packaging Summit Recap

Per-talk notes from the PyCon US 2026 Packaging Summit in Long Beach: Emma Smith on Wheel 2.0 and Zstandard compression, Mike Fiedler on PyPI abuse vectors, Mahe Iram Khan on ecosystems, lightning tal...

bernat.tech

Just published my notes from this year's Python Typing Summit at PyCon US. If you've ever been curious what one of these is like from the inside: intersection types, constraint sets in ty, tensor shapes in Pyrefly, Guido on direction. 🐍📝 bernat.tech/posts/pycon-... #PyConUS

PyCon US 2026 Typing Summit Recap

Per-talk notes from the PyCon US 2026 Typing Summit in Long Beach: Pyrefly and AI agents, ty constraint sets, Lean formalization, tensor shape types, intersection types, PEP 827, Guido on the directio...

bernat.tech

If you’re using Python 🐍 and were excited about pylock.toml adoption, I’d appreciate your help testing pip-lock 🧪: discuss.python.org/t/help-me-sh...

Help me shake out pip-lock 🔒

Hi! 👋 I’ve been building a new top-level command for pip-tools called pip-lock. It produces a PEP 751 pylock.toml from the inputs pip-tools already understands (pyproject.toml, requirements.in, raw ar...

discuss.python.org

pipx 1.12.0 now supports using uv as a backend 🚀 That means much faster environment creation and installs ⚡️ Details: pipx.pypa.io/stable/expla...

#PyTexas26 was a great conference. I took notes through every talk I attended and turned them into a recap — sharing for anyone who couldn't be there or who missed a session or two. bernat.tech/posts/pytexa...

PyTexas 2026 Recap

Per-talk notes from PyTexas 2026 in Austin: Hynek on domain modeling, Dawn Wages on specialization, MCP security, PEP 810 lazy imports, free-threading, Ruff, ty, uv, supply chain.

bernat.tech

Claude too quickly labels problems as “known issues” or “pre-existing failures,” and defaults to workarounds instead of fixing root causes. Even when told not to, it often ignores that and applies a quick hack anyway.

Really happy to have Rahul Devikar (github.com/rahuldevikar) joining as a co-maintainer of virtualenv! Thanks for everything you’ve already done to help keep things moving—glad to have you on board.

rahuldevikar - Overview

Original profile accidently linked to CorpNet: https://github.com/rahuldevikar761 - rahuldevikar

github.com

pipdeptree 2.33.0 is out — we finally dropped the dependency on pip and now use the stdlib for metadata, making things simpler and more robust; also, 2.32.0 added a rich output mode, which makes the tree much nicer to read github.com/tox-dev/pipd...

Release 2.33.0 · tox-dev/pipdeptree

What's Changed ♻️ refactor(deps): drop pip dependency, use stdlib for metadata by @gaborbernat in #552 fix(detection): Allow fallback to different env detectors by @kemzeb in #555 Full Changelog:...

github.com

Wrote down everything I wish I knew earlier about Python supply chain security. Hash pinning, pip-audit, SBOMs, trusted publishing — the whole thing. Enjoy 🐍🔒 bernat.tech/posts/securi...

Puzzles me how virtualenv usage keeps going up when there's uv around, was expecting uv to eat into virtualenv popularity but seems not much impact 🤔

Finally created a dashboard where I can monitor all my open source projects and it's mostly interactive 👀 never could justify the investment doing it manually, but using agentic coding made it much easier. bernat.tech/about

tox TOML now supports every feature INI ever had, which means tox.ini is officially “frozen” — it’s not dead, it’s just enjoying a very stable retirement 🧓🧊 The future is tox.toml 🚀: tox.wiki/en/4.44.0/re...

New in pytest-env: .env file loading via env_files, --envfile for runtime .env switching, --pytest-env-verbose to debug every SET/SKIP/UNSET with source attribution, unset = true to remove vars, pytest.toml support, and subdirectory config overrides. github.com/pytest-dev/p...

GitHub - pytest-dev/pytest-env: pytest plugin to set environment variables in pytest.ini or pyproject.toml file

pytest plugin to set environment variables in pytest.ini or pyproject.toml file - pytest-dev/pytest-env

github.com

virtualenv just got a fresh new logo and updated documentation! 🎉 Take a look at virtualenv.pypa.io and let us know if you spot any bugs or have ideas for improvements — feedback is always welcome.

Rewrote & reorganized the tox docs from the ground up 🚀 Now live at tox.wiki, structured using the Divio documentation system 📚Feedback welcome! 🙌

Spent the last few weeks migrating pyproject-fmt.readthedocs.io from taplo to tombi, rewriting the docs, fixing lots of bugs, and shipping new features (long-form tables!). Check it out and let me know how it goes—also, I probably introduced new bugs, please report them 😄👍

Just released a plugin for @jetbrains IDEs that adds integration for the fish shell scripts, plugins.jetbrains.com/plugin/29973... (uses the fish-lsp server for some of the features). Give it a go and file an issue if you find anything wrong 😎

🛠️ New in tox 4.33+: conditional set_env support with PEP-496 markers: set_env.UV_EXTRA_INDEX_URL = { replace = "env", name = "UV_EXTRA_INDEX_URL", default = "https://e.com/simple", marker = "sys_platform == 'darwin'" } 👉 github.com/tox-dev/tox/...

feat: add conditional set_env support via PEP-496 markers by gaborbernat · Pull Request #3663 · tox-dev/tox

👍

github.com

Refreshed and extended plugins.jetbrains.com/plugin/20536... so now displays more information and has a configuration page.

Proposals for next years conference season done and dusted 😎

My presentation about using rust from python from PyConUS got published very quickly this year 😁 youtu.be/CqOZdTFb4io?...

🐍 Python meets the crab 🦀 - Friendship at first sight? (Sponsor: Bloomberg)

YouTube video by PyCon US

youtu.be

🚀 tox 4.26 is out! - Introduces free-threaded builds (just add t to your env name) - Adds support for Python 3.14 - Fixes virtualenv no longer bundling wheel on >3.9 - Drops support for Python 3.8 Huge thanks to all contributors! 🙌 🔗 github.com/tox-dev/tox/...

Release 4.26.0 · tox-dev/tox

What's Changed Add a missing quote in a TOML example @ config.rst by @webknjaz in #3509 Add colour to GitHub Actions CI logs by @hugovk in #3525 Fix using deprecated virtualenv option --wheel by @...

github.com

@hugovk.dev now that template strings are a thing can we use them in standard logging to use F string like formatting without performance complications? docs.astral.sh/ruff/rules/l... 🤔

See you there 😎