Quentin Pradet

I wrote this to share everything I know about building great SDKs! open.substack.com/pub/pragmati...

I've just published 10 blog posts detailing the #Python Language Summit 2026. The Language Summit was held in Kraków, Poland and included discussions about free-threading, #Rust, garbage collectors, and type annotations. Please enjoy and thank you for your patience: blog.python.org/2026/09/lang...

Last week I published a security advisory for Starlette, and the project got hit with a wave of negative press. So I wrote down my perspective as the maintainer. marcelotryle.com/blog/2026/05...

@sethmlarson.dev and I went through months of intense, complex work to climb a steep and slippery learning curve, only to be stopped short at the very end by a hard ethical line we couldn't cross—it was gut-wrenching. I'm proud of what we did and I'm proud of what we didn't do.

This post was 5 years in the making, @shazow.net and I made a bet about whether "six", the Python 2/3 compatibility shim, would still be a popular package in 2025: sethmlarson.dev/winning-a-be...

Our Python doc is officially out in the wild! 🐍 Thanks to everyone who joined the premiere 🙌 such a good vibe. Here’s the link so you can watch it on repeat youtu.be/GfH4QL4VqJ0

Since PyCon Africa is affected by the PSF Grants pause, I am hopeful that donation tickets can make a difference.

Disqus showing ads on my blog was the last straw for me. I thought about storing comments on GitHub with utterances/giscus, but ended up on Commento. They have a generous free tier, don't track their users, and are trusted by Mozilla. Switching took only 10 minutes! commento.io

This talk is incredible. In 30 minutes, a binary search implementation is sped up by 25x using profiling tools, including L1 cache and pipeline stall analysis. While the tools are Apple-specific, the concepts are general and apply everywhere. developer.apple.com/videos/play/...

In the past nine months, three companies (Speakeasy, Stainless, and Fern) have collectively raised $49M to bring SDK and docs generation to everyone. Why now? I have no idea. After all, this has nothing to do with AI, and OpenAPI Generator has been popular for years.

It looks like mapping the new syntax to the Elasticsearch DSL, which natively supports nested queries and boolean operators, was the easy part. Elasticsearch has lots of features, yes, but it is to support advanced usages like this one!

AGPL continues to get more popular as companies want the open source label for their product! Elastic did the same thing last year.

Facebook are launching a new type checker written in rust. pyrefly.org

Thank you @americanexpress.bsky.social for sponsoring urllib3 and helping improve critical Python internet infrastructure. I know it takes a lot of activation energy for a large company to sponsor an amount like this, so I extra appreciate whoever did the leg work on this. 🙏

Elastic is now on BlueSky! Follow us here for the latest updates on all things search, observability, security and more.

PEP 751 has been accepted! peps.python.org/pep-0751/ This means #Python now has a lock file standard that can act as an export target for tools that can create some sort of lock file. And for some tools the format can act as their primary lock file format as well instead of some proprietary format.

Now I'm looking for someone with 7+ years of FastAPI experience 🤭 Jokes aside, I'm doing interesting new things and want some extra help full-time 🚀 I'm looking for tons of skills and knowledge in SRE / DevOps / Platform / Cloud / name-it ...and of course, FastAPI Email jobs@fastapilabs.com

It's here! The 2024 annual report for #urllib3, a relatively quiet year that included work on HTTP/2 and Web Assembly (WASM). $3,300 worth of bounty issues exist today! quentin.pradet.me/blog/urllib3...

#Git mini tip: Use '-' to refer to the previously checked-out branch with 'git switch' and 'git checkout'. It’s great for returning to a feature branch after pulling the main or toggling back and forth to compare.

Tidelift, @microsoft.com, LaunchDarkly, @sentry.io, @sourcegraph.com, Canva, and @codecov.bsky.social all supported urllib3 in 2024. Thank you!

10 years ago, as part of my PhD, I launched a small PHP 5 application online. It's still up! Now using PHP 8. I intend to keep it online for a few more decades. Cool URIs don't change. Part of the trick is @alwaysdata.bsky.social, my hosting provider, which handles database and system upgrades.

📦 urllib3 2.3.0 is now available! It supports the WebAssembly JSPI API (enabling experimental Node.js support) and adds `HTTPResponse.shutdown()` (thanks to LaunchDarkly for sponsoring this feature). github.com/urllib3/urll... Note that we're still raising funds for full HTTP/2 support!

@gergely.pragmaticengineer.com has this impressive page listing early trends he identified: blog.pragmaticengineer.com/early-trends/. Here's one more: GenAI tools are heavily subsidized (newsletter.pragmaticengineer.com/p/ide-that-s...), so we'll see more expensive subscriptions like ChatGPT Pro.

What this also means is that urllib3 works great with free-threaded Python! 🎉 I am sure it will expose some subtle concurrency bugs that exist already. But before we can have CI, we need cryptography wheels as we use it to generate test certificates.

📣 @quentin.pradet.me wrote 'Does the #Elasticsearch #Python client works with free-threaded Python (no-GIL)?' for the @elastic #AdventCalendar ▶️ https://discuss.elastic.co/t/370392. 🎅🏼🎄🎁

Trying #Python 3.13 free-threading builds with uv is as easy as specifying `--python 3.13t`. If you don't have such an interpreter available, uv will download a standalone build for you! The full list of options to install 3.13t builds is here: py-free-threading.github.io/installing_c...

I really enjoyed this talk and the fun anecdotes around #Python packaging! The highlight for me was @burntsushi.net making `uv pip compile` 3x faster by representing most versions as a single u64 integer, making comparisons much cheaper.

Our #elastic community is growing on bsky 🫎🔎 💙🩵🩷💚💛

I can highly recommend following @gergely.pragmaticengineer.com for the useful software engineering insights and info on the latest industry trends!

If anyone has a reason to hype up language interfaces and LLMs, it’s @inesmontani.bsky.social—founder of Explosion, the company behind the Python NLP tools spaCy and Prodigy. But her take? Sometimes, a simple form does the job better. Let’s build more alarm clocks and less automated window knockers!

Happy to say that this year we're up to 750k USD in paying Open Source maintainers. blog.sentry.io/we-just-gave...

This is your periodic reminder that you should use trustme for your test TLS certificates. They're compatible with all major operating systems while passing all the checks introduced by the `VERIFY_X509_STRICT` validation that was enabled in Python 3.13! trustme.readthedocs.io/en/latest/

go.bsky.app/LAkKWpR If you’re a Python person, wave frantically so I can add you to my Python starter pack!