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Posts by David Hewitt

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CPython Unicode Objects w. Petr Viktorin YouTube video by David Hewitt

I'm looking forward to returning to streaming at 9:30 AM UTC tomorrow 27th March.

Please join myself and Petr Victorin as we begin a project to work on CPython's `str` implementation - targeting optimizations when exchanging data with Rust UTF-8 strings.

www.youtube.com/live/fXeqeFX...

2 weeks ago 2 1 0 0
GitHub - rvben/rumdl: Markdown Linter and Formatter written in Rust Markdown Linter and Formatter written in Rust. Contribute to rvben/rumdl development by creating an account on GitHub.

Absolutely loving using github.com/rvben/rumdl to lint markdown, just like `ruff`, it's crazy fast!

I just signed up as rvben's first GitHub sponsor, calling on everyone to join me in showing this project some support!

2 months ago 1 0 1 0

I currently have availability for Rust coaching, adoption, or development; from a single call to ongoing 3 days/week. I can help your team get things done, adopt Rust and use it more effectively, or to accurately evaluate Rust as a new technology.

5 months ago 15 17 1 0

TIL, this is so helpful!

7 months ago 1 0 1 0

Going live in 10 minutes! Come see us play with Rust, AI and AI-assisted debugging!

7 months ago 2 0 0 0
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Using OpenAI Codex & Pydantic Logfire to Debug Rust Code: Livestream and Recording | Pydantic A YouTube live session and recording showing how to use Pydantic Logfire to debug OpenAI Codex

I will be going live in 5 hours to play with OpenAI Codex CLI and show the power of combining it with Pydantic Logfire's Rust SDK and MCP server to debug Rust apps.

Should be a relatively gentle introduction to AI-assisted development, please come along check it out!

pydantic.dev/articles/ope...

7 months ago 3 0 0 1
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Rust: Python's New Performance Engine Rust usage for Python extensions surged 22% in one year as developers choose memory safety and C-level performance over traditional approaches.

Rust usage for Python extensions surged 22% in one year as developers choose memory safety and C-level performance over traditional approaches.

By @darrylktaft.bsky.social

7 months ago 1 1 0 1

Love these kinds of wins! Have spent a lot of time trying to factor out PyO3's proc macros in the same way 😁

7 months ago 1 0 0 0
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Vote to promote Emma Smith As her mentor, I am very happy to propose promoting Emma Smith (@emmatyping on DPO and GitHub) to core developer. Emma has been a long time contributor to Python in many areas over the years, from myp...

I'm *so* excited to share that I am now officially a CPython Core Developer! 🥳

I wrote my first Python in 2012, and immediately fell in love with the language. I'm honored that I am a part of, and can give back to, such an amazing, welcoming community!

discuss.python.org/t/vote-to-pr...

8 months ago 122 11 12 0

I think worthy of a standalone issue, even if we ultimately decide the solution is the same thing there's a good chance it can be a standalone feature 👍

8 months ago 2 0 1 0
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Rust, Python, and TypeScript: the new trifecta · baby steps

I completely agree with this great blog post by @nikomatsakis.com betting that Rust, Python and Typescript will be stables of the AI coding era 👍

These languages combined have the package ecosystems and domain coverage to meet most programming needs.

smallcultfollowing.com/babysteps/bl...

8 months ago 3 0 1 0

Build a tool with Rust, then integrate it into Python with the amazing PyO3 🦀 😍 📈

8 months ago 5 2 1 0
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`#[pyclass]` trait ergonomics · Issue #4207 · PyO3/pyo3 Following up to #4202 and #4206 I wanted to write down something I've been thinking about for a while. It looks like we're moving ahead with accepting those options so I'll assume that at least the...

I have wanted to have the ability to derive constructors for a while, `Default::default()` would make a ton of sense.

Perhaps related closely to the `#[pyclass(dataclass)]` idea I discuss on github.com/PyO3/pyo3/is...

8 months ago 2 0 1 0

Beyond just compile times, the ability to iterate with Python in REPL and notebook environments is so valuable.

I've seen this pattern time and time again where the machinery needs to be in a native language and Python gets to sit in the driver's seat.

8 months ago 0 0 0 0

pyo3 is great. sick of Rust compile times? Just build your Rust crate into a Python module, then use it with all your other Python

8 months ago 5 2 3 0
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Legacy Client pooling messes tower::TraceLayer tracing · Issue #3904 · hyperium/hyper Version hyper 1.6.0 hyper-util 0.1.12 tower 0.5.2 tower-http 0.6.4 Platform Linux 6.10.14-linuxkit #1 SMP Tue Apr 15 16:00:54 UTC 2025 aarch64 GNU/Linux Description When using tower_http::TraceLaye...

In case anyone else has been having recent trouble with Rust tracing having spans seemingly hanging open at random - spent a huge debugging session to arrive at github.com/hyperium/hyp...

Will be interesting to see what the solution to this one is.

9 months ago 2 0 0 0
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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.

9 months ago 236 43 5 3

I'm back, babbyyyy

More async coming your way at @rustconf.com. I've spent many years writing software with async Rust. It's a great tool but easy to misuse. Sign up and I can teach you some of my knowledge to kick start your teams.

9 months ago 4 2 2 0

Yeah, this is a frustrating one. I have ideas how to make it better, really cargo test should not be broken like this. "Just" need to write them down and get buy in.

9 months ago 2 0 1 0
Rustacean Station Come journey with us into the weird, wonderful, and wily world of Rust.

A bit of a long shot: the regular audio editor for the "What's New" Rustacean Station episodes is now busy with other life stuff. The last episode I edited myself, but it took ages! Anyone know an editor (ideally familiar with Rust, but not a requirement) who'd take on a regular (paid) editing gig?

9 months ago 18 9 1 0
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This is the first time I am doing this #TeaWithCheuk a 1-1 meeting with me at #PyDataLDN to talk about anything #Python #PyCharm #DataScience etc. limited slot, booking link in the comment.

@pydatalondon.bsky.social @pycharm.dev

10 months ago 10 4 1 0

A critical component for our database in Pydantic Logfire. Having a lot of fun building with this!

10 months ago 3 0 0 0
Slidev

Thanks to everybody who came to my talk at #PyConUS yesterday! As promised, here are the slides: pycon-us-2025-davidhewitt.vercel.app

10 months ago 4 0 1 1
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#PyconUS attendees. Have time? We REALLY need more volunteers tomorrow, Sat 🥺. Green room volunteers, session runners, swag distribution, registration,information desk. Login to us.pycon.org/ on your dashboard, click on volunteer>volunteering. Pick the time you're free!

10 months ago 5 9 0 0

I like to think that when Charli xcx sang “Unlock It (Lock It)”, she was referencing thread safety with mutexes.

10 months ago 17 2 3 0
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Our social run group this morning at #PyConUS Ed, Hynek, David Hewitt and David Lord.
Running again 7:30 Saturday anyone welcome!

10 months ago 29 3 1 0

🎂 Rust turns 10 today! 🎂

To mark the anniversary of Rust 1.0, we’re excited to share a reflection by Graydon Hoare, the initial author of Rust.

It’s a story of infrastructure, community, and extraordinary collaboration.

Read Graydon's guest blog here: rustfoundation.org/media/10-yea...

10 months ago 30 10 0 3
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Photo with my old core dev friends.

@vstinner.bsky.social and Erlend.

#PyConUS

10 months ago 11 2 0 0
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#Education summit at #PyConUS we are here because we want to help more people to learn #Python - thank you so much for our super star organisers Kelly and Sean

10 months ago 3 1 0 0

I’m at PyCon US today! 😁

10 months ago 2 1 0 0
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