I started WireDB, a new database built on top of CRDTs. davidbrochart.github.io/wiredb

Pycrdt 0.12.40 is out with Python 3.14 support.

Wondering what @simonwillison.net is building with pycrdt: simonwillison.net/2025/Oct/5/p...

Put some final touches to Toad's permission request screen. When the agent has an update, it pops this screen up. You can review the diffs in unified or split view, then decide if you want to accept or reject the changes. Watch this space!

You made my day @pydantic.dev 😁 pydantic.dev/articles/pyd...

📢 Talk Announcement "Open-source Business", by @sylvaincorlay.bsky.social from @quantstack.bsky.social and @ylechelle.bsky.social from @probabl.ai 📜 Talk info: pretalx.com/pydata-paris-2025/talk/LMTCZS 📅 Schedule: pydata.org/paris2025/schedule 🎟 Tickets: pydata.org/paris2025/tickets

I gave a presentation of Microverse during the last Jupyter Community Call: youtu.be/Nx1j3NB-GnI?... Microverse is a version of JupyterLab that runs entirely in the browser. Unlike JupyterLite, it runs a server in the browser. You can read more about it in this blog post: medium.com/@david-broch...

It's nice to see pycrdt powers a pretty popular project (outside Jupyter): docs.openwebui.com

Looking at Toad's console, I can see some similarities with a Jupyter notebook, with AI superpowers. I started github.com/davidbrochar... a while ago, but I'm wondering if Toad could be "Jupyter-compatible".

Premiere of the Python documentary in 15 minutes. Hanging out in the premiere chat :) www.youtube.com/watch?v=GfH4...

📢 Talk Announcement "Parallel processing using CRDTs", by davidbrochart.bsky.social from quantstack.bsky.social. 📜 Talk info: pretalx.com/pydata-paris-2025/talk/9R9JTQ 📅 Schedule: pydata.org/paris2025/schedule 🎟 Tickets: pydata.org/paris2025/tickets

I wrote a blog post about Microverse, a new in-browser JupyterLab. david-brochart.medium.com/microverse-j...

Sneak preview of what's coming to Microverse: real-time collaboration 🚀 This is not a re-implementation of JupyterLab's RTC so that it runs in the browser, it is the same Jupyter Collaboration package. That's exactly what I expect Microverse to bring to the table: more compatibility with JupyterLab.

JupyterGIS-tiler can do a lot of processing in the backend. For instance you can clip a raster layer with a vector polygon, and have sub-pixel rendering. Here is an example of DEM clipping with the Amazon river watershed: github.com/geojupyter/j...

When you expect to use an LLM to help you live code but you loose Internet access during your talk, "it's like old days"! @marcelotryle.bsky.social you made my day 😄 www.youtube.com/watch?v=agSs...

If you think you should use asyncio because it's the native async framework in Python, you might want to read this (TLDR: use AnyIO instead): anyio.readthedocs.io/en/stable/wh...

Microverse is deployed on GitHub pages here: davidbrochart.github.io/microverse/ Note that it doesn't work in Firefox and that it's quite slow to start up (see dev network). It's still very early stage, but it's improving. One interesting feature is how kernels can be shared between browser windows.

The Toad is out of the bag! 🛍🐸 Announcing Toad - a universal UI for agentic coding in the terminal willmcgugan.github.io/announcing-t... #Python #AI

Microverse is a new in-browser version of JupyterLab. Don't we already have JupyterLite, you might ask? While there is no web server in JupyterLite, there is one in microverse, and it is Jupyverse. I think this will open up new possibilities.

The day before treason day (jk) is a terrible time to announce anything, so consider this a teaser. I've spend the last two afternoons hacking on an experimental terminal UI for a AI coding agent called Toad 🐸 Will be posting more soon. Follow me if you aren't already! #Python #Textual #AI

New blog post: "Create your own layers in JupyterGIS". Use the power of notebooks to compute custom tiles on-the-fly from Xarray (big) data, interact and collaborate on the map right from JupyterLab. david-brochart.medium.com/cbb995a89b16

My talk at PyData Paris on "Parallel processing using CRDTs" has been accepted and I want to illustrate it with the image bellow. The small ships are all the peers that are concurrently mutating the global state (the big ship). They can all diverge temporarily but they tend to converge eventually.

Introducing a new exciting NumFOCUS Sponsored Project: GRASS! grass.osgeo.org 💚 GRASS is a geospatial engine that enables spatial data analysis, visualization, and modeling. It provides science-backed tools to understand and manage landscapes and human environments. Welcome to NumFOCUS family! 💚

I'm working on a new in-browser JupyterLab. The difference with JupyterLite is that there is a server running in the browser 🚀 It's actually Jupyverse, a FastAPI-based Jupyter server.

This is a big deal!

jupytergis-tiler allows to visualize local or remote Xarray datasets in JupyterGIS. It doesn't matter if the data is huge and doesn't fit in memory, the tiler will render to the screen just what you need to see. All powered by @developmentseed.org's awesome TiTiler! github.com/geojupyter/j...

I'm honestly tired of these programming language wars. I mean, there is nothing wrong with C++, as long as it's wrapped in a Python extension 😜

The pycrdt Python library found its new home in the y-crdt organization. Originally created for the Jupyter project, it is a general Yjs-compatible CRDT implementation that can be used in any project, independently of Jupyter. github.com/y-crdt/pycrdt

I created my first repository on Codeberg: codeberg.org/davidbrochar... Jpterm is no longer being developed on GitHub.

Data analysis in @jupyter.org with... TypeScript?! 😱 ✅ using `fetch` and other web standards ✅ fast dataframes with nodejs-polars ✅ easy charts with @observablehq.com ✅ rich interactive UIs with JavaScript Learn more in this detailed walkthrough 👇 deno.com/blog/explori...

JupyterCon 2025 is happening! Join us in San Diego, California, from November 3–6, 2025. CFP is open now. Learn more at bit.ly/jupytercon

I wrote a blog post about making Qt collaborative using CRDTs. david-brochart.medium.com/94c470703253

Catch Afshin Darian, technical director at QuantStack and a member of the Jupyter Executive Council, in this short interview as he discusses open source software, his work at QuantStack, and the exciting challenges ahead. www.youtube.com/watch?v=lR-x...

Our next OSS love letter

Jupyverse can now run on Trio, which is kind of cool 😀 At least when authentication is not enabled. When it is, it uses FastAPI-Users which uses SQLAlchemy, which depends on asyncio. Not sure if writing an SQLAlchemy dialect for sqlite-anyio would be enough 🤔

I wrote some documentation for anyioutils: davidbrochart.github.io/anyioutils

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!

📢We are excited to announce the keynote speakers for our 2025 conference: - Alenka Frim from United.Cloud - Ralf Gommers from @quansight.com - Anita Graser from the Austrian Institute of Technology Join us at PyData Paris at Cité des Sciences from Sep 30 to Oct 1, 2025. medium.com/@PyDataParis...

AnyIO tries to simulate Trio on top of asyncio. Anyioutils tries to simulate asyncio on top of AnyIO. github.com/davidbrochar...

Sparrow is out: an implementation of the Apache Arrow memory format in C++20. johan-mabille.medium.com/sparrow-1f23...

🎉 Say hello to py-rattler-build! 📦 Now you can build conda packages directly in Python! It's never been easier. Get started today: rattler.build/latest/refe... Available on conda-forge and PyPI! 🚀

#JupyterLab 4.3.5 is available. Includes fixes for: - scroll restoration on undo/redo - accessibility: color contrast and missing titles - disabling fuzzy filtering in file browser - general stability - execution indicator restoration (for server-side execution) github.com/jupyterlab/j... #jupyter

🐍🎧 Simon Willison: Using LLMs for Python Development What are the current large language model (LLM) tools you can use to develop Python? What prompting techniques and strategies produce better results? https://realpython.com/podcasts/rpp/236/

🔍 Collaborative editing in Jupyter now allows real-time document modification, powered by Conflict-free Replicated Data Types (CRDTs). David Brochart explores new possibilities with CRDTs, including a suggestion system, AI collaboration, and full notebook state recovery. youtu.be/VXXLnmGqAO4

Open and run GitHub-hosted (Jupyter) notebooks in Marimo 🤯 - no installation required (full WASM) - access the GitHub contents from the notebook - just prepend 'http://marimo.app' to the GitHub URL news.ycombinator.com/item?id=4270...

🎉 🌎 🪐 I'm thrilled to announce GeoJupyter, an effort to imagine and build rewarding new user experiences for working with geospatial data in JupyterLab! 🤗 I hope to see you in an upcoming community meeting or in our Zulip chat (see the post for links)! geojupyter.org/blog/2025010...

Marimo 0.10.10 is out, with real-time collaboration 🎉 This is using the same technology as Jupyter (CRDTs). It's great to see how the two projects can benefit from each other. As a contributor to both projects I think there can be a future where they share more functionalities.

RTC: prefix has been a roadblock in wider adoption of #jupyter collaboration as many extensions did not support it. The RTC prefix is no more thanks to content providers pioneered by @davidbrochart.bsky.social 🎉 To test it: pip install --pre "jupyterlab>=4.4.0a2" "jupyter-collaboration>=4.0.0a0"

I do believe I nailed text selection in Textual. Coming to the next version...