Charlie Marsh
@charliermarsh
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Building @astral_sh: Ruff, uv, and other high-performance Python tools. Prev: Staff engineer @SpringDiscovery, @KhanAcademy, BSE @PrincetonCS.
Brooklyn, NY
Joined March 2009
Announcing uv: an extremely fast Python package installer and resolver, written in Rust. uv is designed as a drop-in alternative to pip, pip-tools, and virtualenv. With a warm cache, uv installs are near-instant. Here, it's > 75x faster than pip and pip-tools.
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Holy shit, did you see the Glorp announcement? They're building the future of slop. It's basically the world's first Operating System for glorbs, reimagined for the AI era. And they're just getting started.
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The first AI-native operating system?? Don't make me tap the sign.
After 3 years in stealth, Warmwind OS is live. Most people waste hours bouncing between ChatGPT, Notion, Midjourney & 37 browser tabs. We built the first AI-native operating system, where one AI uses all your apps to execute full, long term and complex workflows for you while
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As someone who’s incredibly impatient at all times I think 4o is underrated.
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Revenge of the mods
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Generating an MCP directly from something else (like an OpenAPI spec or a CLI framework) _feels_ wrong, but is it?.
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One underrated implication here: we can now build and publish your package without running or even installing Python. In pure Rust, we can build your Python package, install it, publish it to a registry, etc.
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Try it out by setting your project's build system, or running `uv init --build-backend uv`:. ```toml.[build-system].requires = ["uv_build>=0.7.19,<0.8.0"].build-backend = "uv_build".```. (In a future release, we'll make this the default.).
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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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RT @noamteyssier: I use this all the time! Great for quick inspections without loading up a jupyter notebook. I actually submitted a PR to….
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If you run `uvx python` with a Python version that isn't already installed, we'll install it for you. Install uv on a new machine, run `uvx --with polars python3.14`, and uv will drop you into a REPL with the latest Python 3.14 beta and Polars installed.
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You can make this even shorter with uvx. For example:. uvx --with polars python
You can use `uv run` to drop into a REPL with arbitrary Python dependencies pre-installed. Super useful for quick scripting or testing. For example: `uv run --with pandas --with pyarrow python` to inspect and query a Parquet file.
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You can use `uv run` to drop into a REPL with arbitrary Python dependencies pre-installed. Super useful for quick scripting or testing. For example: `uv run --with pandas --with pyarrow python` to inspect and query a Parquet file.
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RT @andrew_n_carr: *claude reinstalling my cuda drivers*. Your machine is not just useless — it's PROPERLY RUINED 🚀.
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My first reaction was that there are so many other examples missing from the pic.
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