iiinova — where your digital self keeps evolving

Reposted by Charlie Marsh

Sebastián Ramírez @tiangolo.com · 10/11/2025

A basic @fastapi.tiangolo.com app, just one command away. 🎁 First FastAPI thing from @savannah.dev ! 🙌 Also, @crmarsh.com 's uv is awesome, use it. 😎

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Charlie Marsh @crmarsh.com · 13/08/2025

Today, we're announcing our first hosted infrastructure product: pyx, a Python-native package registry. We think of pyx as an optimized backend for uv: it’s a package registry, but it also solves problems that go beyond the scope of a traditional "package registry".

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Charlie Marsh @crmarsh.com · 03/07/2025

The uv build backend is now stable, and considered ready for production use. An alternative to setuptools, hatchling, etc. for pure Python projects, with a focus on good defaults, user-friendly error messages, and performance. When used with uv, it's 10-35x faster.

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Charlie Marsh @crmarsh.com · 13/05/2025

Today, we’re announcing the preview release of ty, an extremely fast type checker and language server for Python, written in Rust. In early testing, it's 10x, 50x, even 100x faster than existing type checkers. (We've seen >600x speed-ups over Mypy in some real-world projects.)

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Reposted by Charlie Marsh

Trifecta Tech Foundation @trifectatech.bsky.social · 14/03/2025

zlib-rs is now used in uv! uv is the extremely fast Python package & project manager with over 200M requests/day. Not only are we happy about the adoption but also grateful for Astral and @crmarsh.com stepping up and supporting us through a GitHub sponsorship. Thanks!

github.com

Migrate to `zlib-rs` (again) by charliermarsh · Pull Request #11894 · astral-sh/uv

Summary I believe zlib-rs is now a better choice on ARM and x86, so I'm just going to assume it's a better choice everywhere. It's much easier to build (removes our CMake dependency), a...

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Reposted by Charlie Marsh

Zanie Blue @zanieb.bsky.social · 12/03/2025

In the latest version of uv, we've updated the build system for our managed Python versions to use the latest LLVM version and cherry-picked an extra fix for a performance bug (github.com/llvm/llvm-pr...) and the early benchmarks are pretty exciting! On M3 macOS

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Charlie Marsh @crmarsh.com · 16/02/2025

uv is one year old today. Hard to believe its only been a year. The growth, adoption, and impact surpassed my wildest expectations. Happy birthday, uv! 🥳

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Reposted by Charlie Marsh

Zanie Blue @zanieb.bsky.social · 12/02/2025

Python 3.14.0a5 is out today in uv 0.5.31 and includes a new tail calling interpreter which, from some quick benchmarks, looks like a 1.23x performance improvement !

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Reposted by Charlie Marsh

Rodrigo Girão Serrão 🐍🚀 @mathspp.com · 11/02/2025

How to create a Python CLI that's globally available in your system in 5 easy steps. 1. Install uv 2. Init project with `uv init --app --package mycli` 3. Write code 4. Install with `uv tool install . -e` 5. Use `mycli` anywhere in your computer

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Reposted by Charlie Marsh

Real Python @realpython.com · 10/02/2025

🐍🎧 Charlie Marsh: Accelerating Python Tooling With Ruff and uv How is the Rust programming language being used to speed up Python tools? This week on the show, we speak with @crmarsh.com about his company, Astral, and their tools, uv and Ruff. realpython.com/podcasts/rpp/238

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Charlie Marsh @crmarsh.com · 29/01/2025

We’re building a new static type checker for Python, from scratch, in Rust. From a technical perspective, it’s probably our most ambitious project yet. We’re about 800 PRs deep!

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Charlie Marsh @crmarsh.com · 29/01/2025

Incredible: PyCharm now ships with first-class support for uv!

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Charlie Marsh @crmarsh.com · 27/01/2025

We're continuing to grow the Astral team, and every hire we make is like a dream hire. I don't understand how we're doing it but it rules. This time, it's @gankra.bsky.social! Most recently CTO at Axo, author of cargo-dist, author of The Rustonomicon, Rust 1.0 team member, and more.

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Charlie Marsh @crmarsh.com · 11/01/2025

It was really valuable for me to stay at a single company long enough to live with the consequences of my own engineering decisions. To come face-to-face with my own technical debt. It takes a few years for this to play out but IMO it's an important part of engineering growth.

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Reposted by Charlie Marsh

Socket @socket.dev · 09/01/2025

🚀 Big news for #Python devs! Socket now supports uv.lock files, bringing deterministic dependency resolution and enhanced supply chain security to your projects. 🛡️ Say goodbye to dependency hell and hello to secure, consistent builds! 🔒✨ @crmarsh.com socket.dev/blog/socket-...

socket.dev

Socket Now Supports uv.lock Files - Socket

Socket now supports uv.lock files to ensure consistent, secure dependency resolution for Python projects and enhance supply chain security.

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Charlie Marsh @crmarsh.com · 08/01/2025

We now have first-class documentation for using uv with AWS Lambda docs.astral.sh/uv/guides/in...

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Charlie Marsh @crmarsh.com · 08/01/2025

In the next uv release, resolving Apache Airflow (with a warm cache) gets over 2x faster.

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Charlie Marsh @crmarsh.com · 07/01/2025

You can now install the latest Python 3.14 alpha with uv

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Charlie Marsh @crmarsh.com · 06/01/2025

When we get Renovate PRs for dependencies that people on the Astral team maintain

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Charlie Marsh @crmarsh.com · 05/01/2025

A nice side-effect of making things programmable is that it's much easier to get help from LLMs... For example: infrastructure-as-code means that I can get an LLM to generate CDK, then run the generated CDK, paste back errors, and iterate. No need for any other form interaction.

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Charlie Marsh @crmarsh.com · 03/01/2025

As someone that learned Rust in 2022, it's easy to forgot how long it takes to build a language and an ecosystem... Rust 1.0 was almost 10 years ago (2015). Graydon Hoare started working on it almost 20 years ago (2006).

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Charlie Marsh @crmarsh.com · 29/12/2024

Being 100% serious, for me what's described here is a big part of Rust's success. It's fun. And it makes things that are often un-fun (installing the toolchain, adding dependencies) easy.

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Charlie Marsh @crmarsh.com · 29/12/2024

I love the Fish shell writeup on their Rewrite-it-in-Rust journey. It's really nuanced: there's some good, some bad, some introspection on their own mistakes. But most importantly: they did it! 2604 commits over ~two years of work across > 200 authors. Ship ship ship! fishshell.com/blog/rustport/

fishshell.com

Fish 4.0: The Fish Of Theseus

A smart and user-friendly command line shell

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Charlie Marsh @crmarsh.com · 25/12/2024

My Christmas gift is this series of PRs making standalone PEP 723 scripts first-class targets for all uv commands. You'll be able to create lockfiles for PEP 723 scripts, export them to requirements.txt, view the dependencies with uv tree, and more.

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Charlie Marsh @crmarsh.com · 24/12/2024

Any good write-ups on performance improvements across glibc versions? I.e., what kind of lift can you expect when bumping your glibc version?

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Charlie Marsh @crmarsh.com · 23/12/2024

We now have a shared channel with the CPython core devs where we're discussing upstreaming python-build-standalone changes to CPython itself. It's been pretty awesome to see how welcoming, receptive, and helpful they've been. Grateful!

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Charlie Marsh @crmarsh.com · 23/12/2024

Hearing early reports that the first Astral PR upstreaming python-build-standalone changes to CPython has been merged...

gh-100384: Error on unguarded-availability in Darwin builds (#128155)

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Charlie Marsh @crmarsh.com · 23/12/2024

Last week I focused on addressing quirks in python-build-standalone and fixing the common pain points with uv-installed Pythons. For example: if you've ever run into this tkinter error, it's now fixed.

A build failure indicating that Tcl wasn't installed properly.

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Reposted by Charlie Marsh

David Soria Parra @thedsp.bsky.social · 19/12/2024

Thanks to @crmarsh.com's uv and @jlowin.dev's FastMCP, the simplest MCP Server in Python with prompts, resources and tools, will soon be: gist.github.com/dsp-ant/f5f7.... One file, 34 lines! FastMCP will be part of Python MCP SDK 1.2.0, coming in the next days.

gist.github.com

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Charlie Marsh @crmarsh.com · 19/12/2024

A Git repo is worth a thousand words (when filing issues)

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Charlie Marsh @crmarsh.com · 18/12/2024

Unfortunately I’ve discovered a new “hardest problem in Python dependency resolution”

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Charlie Marsh @crmarsh.com · 17/12/2024

python-build-standalone is now officially part of the Astral organization!

https://github.com/astral-sh/python-build-standalone

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Charlie Marsh @crmarsh.com · 16/12/2024

It's so over (just wrote some C)

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Charlie Marsh @crmarsh.com · 15/12/2024

uv's resolver now recognizes that certain combinations of markers are impossible, even if the grammar allows them. For example, sys_platform == "darwin" and platform_system == "Windows" can't be true at the same time. Lets us do less work by solving fewer combinations.

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Charlie Marsh @crmarsh.com · 15/12/2024

Justifying my terrible new abstraction by referring to it as a "lowering" (wiser, more powerful)

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Reposted by Charlie Marsh

Hugo van Kemenade @hugovk.dev · 10/12/2024

Congratulations to the new #Python Steering Council for 2025! 🗳️ @pumpichank.bsky.social 🗳️ @corona10.bsky.social 🗳️ @emilyemorehouse.bsky.social 🗳️ @gpshead.bsky.social 🗳️ @pablogsal.com discuss.python.org/t/steering-c... hugovk.github.io/python-steer... #SteeringCouncil #PythonSteeringCouncil

Chart showing the members of each council over time.

This is the fifth year Pablo, fourth for Greg third for Emily, second (in a row) for Barry and first for Donghee.

The same chart but including Guido's 28 year stint as BDFL.

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Charlie Marsh @crmarsh.com · 10/12/2024

Have we reached peak Member of Technical Staff?

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Charlie Marsh @crmarsh.com · 09/12/2024

uv has made it into GitHub's default .gitignore

gitignore/Python.gitignore, with a uv.lock entry

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Charlie Marsh @crmarsh.com · 06/12/2024

My @eurorust.eu talk is up! "Building an extremely fast Python package manager, in Rust" It was the closing talk of the conference, covering what uv is, why we built it, how it works, what makes it fast -- and the role that Rust plays in all of this. www.youtube.com/watch?v=zOY9...

youtube.com

Building an extremely fast Python package manager, in Rust - Charlie Marsh | EuroRust 2024

YouTube video by EuroRust

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Reposted by Charlie Marsh

John Paton @johnpaton.net · 05/12/2024

How I use Astral’s uv to manage my local development environments: 1. Install uv through homebrew, install Python versions through uv. Upgrade uv version to get access to new Python builds, do this frequently #pythonprogramming

docs.astral.sh

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Charlie Marsh @crmarsh.com · 04/12/2024

2025 budget? That's an Astral Projection

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Charlie Marsh @crmarsh.com · 04/12/2024

python-build-standalone has exploded in popularity, with over 70M downloads all-time. But what is a "standalone" Python build? It wasn't obvious to me at first! Initially, I didn't understand what problem was being solved or why it mattered...

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Charlie Marsh @crmarsh.com · 04/12/2024

Big news: Gregory Szorc's python-build-standalone project will be transitioning to Astral. If you've installed Python with uv, then you've used python-build-standalone. It powers installs for uv, Rye, mise, Bazel, pipx, Hatch, and more, with over 70,000,000 downloads. astral.sh/blog/python-...

astral.sh

A new home for python-build-standalone

Astral is taking stewardship of python-build-standalone, Gregory Szorc's foundational project for installing portable Python distributions.

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Charlie Marsh @crmarsh.com · 03/12/2024

The Astral documentation gets... a lot of traffic? That seems good

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Reposted by Charlie Marsh

Douglas Creager @dcreager.net · 02/12/2024

Today is my first day at Astral! Very excited to work with @crmarsh.com and the gang on Python tooling. It'll be fun (and strange) to focus on only one language for a bit!

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Charlie Marsh @crmarsh.com · 02/12/2024

I still find that Claude and ChatGPT are really, really weak at answering questions about Rust. Instead I use BurntSushi API for my questions.

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Charlie Marsh @crmarsh.com · 02/12/2024

Always a good reminder: both Ruff and uv see more PyPI downloads from Windows than macOS.

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Charlie Marsh @crmarsh.com · 01/12/2024

I've never done Advent of Code and at this point I'm afraid to try

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