Sebastian Benthall @sbenthall.bsky.social scientist, dad. working on neurosymbolic AI systems for computational economics.
Research Scientist, International Computer Science Institute
Research Director, New York University School of Law
https://sbenthall.net/ - https://digifesto.com/
Rachel Kerestes @kerestes.bsky.social Perpetually curious.
Scientist by training and temperament.
Tennis player. Ocean lover. Occasional mischief-maker. Executive Director @numfocus.bsky.social
Views mine.
julie @jkru.bsky.social KAD. stationery collector. open source scientific computing superfan. views are, of course, my own.
@lambiotte.bsky.social @lambiotte.bsky.social 
Fernando Pérez @fernandoperez.org Open source, open science, AI in science for earth/ice and healthcare. IPython creator, @projectjupyter.bsky.social and 2i2c.org co-founder.
Prof @ UC Berkeley Stats, director of @ucbids.bsky.social, co-director @schmidtdse.bsky.social; LBL scientist.
Kirstie Whitaker @kirstiejane.bsky.social ☀️ Executive Director for @ucbids.bsky.social
💽 Previously: Director for #OpenSource Tools, Practices and Systems at The Alan Turing Institute
🌱 Founder @turingway.bsky.social
🌎 #Inclusive #Communities
💕 Solo mum by choice
Martin Coll @colltoaction.bsky.social Hyping hypergraphs 🇦🇷
https://github.com/colltoaction
Dario Taraborelli @dartar.bsky.social Tending the commons 🌱 open science and open source for science • naturalist 🐦 • he/him • mugshot by Ian Mulvany • Q21562060
Trying to rebuild a home here and prepare for the winter.
nitens.org
os4science.org
instagram.com/dariobirds
Matt Fisher @mfisher87.bsky.social He/him 🏳️🌈. Research software engineer @ UC Berkeley Schmidt Center for Data Science and Environment. Open Science / open source enthusiast. Nature lover 🌱🐕🌵🦌🌼🐦. Music lover 🎶🎹🥁🎵. Tinkerer 🛠️.
github.com/mfisher87
Project Jupyter @jupyter.org Multi-language interactive computing environments. Jupyter Notebook, JupyterLab and related projects – @mentions not monitored. Open issues on GitHub.
Compute! Paris @computeparis.bsky.social 🇫🇷 The Compute! Paris conference.
November 25-26 2026 • Sorbonne Université
NumFOCUS @numfocus.bsky.social Open Code = Better Science NumFOCUS is a 501(c)(3) nonprofit that supports and promotes world-class, innovative, open source scientific computing.
Jaime Rodríguez-Guerra @jaimergp.dev Another PhD captured by open source.
⇒ Core team at @conda-forge.org.
⇒ Steering council at @conda.org.
⇒ Staff Software Engineer at @quansight.com.
⇒ Blogging at rjai.me.
he/him
Colin Carroll @colcarroll.bsky.social Runner, biker, hiker. Software engineer @DeepMind, and open source enthusiast. Sometimes crafts things out of wood. he/his.
Matthew Feickert @matthewfeickert.com Research scientist at UW-Madison data science institute working on #LHC #physics and data science with the ATLAS experiment @ CERN and IRIS-HEP. PhD @ SMU
Paul “π” Ivanov - @ivanov@mastodon.sdf.org @paulivanov.bsky.social onward and awkward.
Dask @dask.org Dask natively scales Python
Dask provides advanced parallelism for analytics, enabling performance at scale for the tools you love
https://dask.org
Python Software Foundation @python.org The nonprofit organization behind the Python programming language. For help with Python code: http://python.org/about/help/
On Mastodon: @ThePSF@fosstodon.org
Data Umbrella @dataumbrella.org ◈ community
◈ data science & open source
◈ videos: https://youtube.com/@dataumbrella
◈ events: https://meetup.com/data-umbrella
◈ news: dataumbrella.substack.com/
conda @conda.org conda is a multi-platform and language-agnostic open source package management and environment management ecosystem.
⇒ https://fosstodon.org/@conda
⇒ https://conda.org/
PyData Madrid @madrid.pydata.org Encuentros mensuales sobre datos e IA en Madrid
SciPy Conference 2026 @scipyconf.bsky.social SciPy 2026 Conference for Scientific and Technical Computing topics in Python. Tutorials July 13-14, Conference July 15-17, Sprints July 18-19.
scikit-learn @scikit-learn.org Machine learning in Python • Open Source
https://scikit-learn.org
PyMC @pymc.io Probabilistic Programming and Bayesian Modeling in Python
ArviZ @arviz.bsky.social Official account for the ArviZ project. We provide #FOSS tools for exploratory analysis of #Bayesian models in #Python and #JuliaLang
www.arviz.org
2i2c @2i2c.org A non-profit dedicated to helping communities create and share knowledge with open infrastructure for interactive computing. We work in the open, follow along with our blog here 👉 https://2i2c.org/blog
DuckDB @duckdb.org DuckDB is an analytical in-process SQL database management system. "DuckDB" and the DuckDB logo are registered trademarks of the DuckDB Foundation.
PyData Southampton @pydatasoton.bsky.social https://www.meetup.com/pydata-southampton
Southampton, UK chapter of PyData
PyData Madrid @pydatamadrid.masto.ai.ap.brid.gy Meetup de la comunidad PyData en Madrid. ¡Únete!
Toots por @astrojuanlu
[bridged from https://masto.ai/@pydatamadrid on the fediverse by https://fed.brid.gy/ ]
PyData London @pydatalondon.bsky.social https://london.pydata.org
We run a monthly meetup and host the annual PyData London conference. PyData is an educational program of NumFOCUS, helping our community share ideas and learn from each other.
https://www.meetup.com/PyData-London-Meetup/
Rowan Cockett @row1.ca I talk about computational #openscience communication and science publishing. On the jupyterbook.org & @mystmd.org teams, co-founder of @curvenote.com & @continuous.foundation.
Chris Holdgraf @choldgraf.com Executive Director of @2i2c.org
🪐 Jupyter Project distinguished contributor
👬 mybinder.org and hub.jupyter.org team
📚 jupyterbook.org mystmd.org and executablebooks.org
open communities 🙌
open infrastructure 💻
open science 🧪
Pradyun Gedam @pradyunsg.me he/him. Probably trying to make refined sand do something useful.
Wearer of many hats in OSS spaces: CPython, pip, packaging, TOML, Furo, Sphinx extensions, Executable Books and more.
Phil Elson @pelson.bsky.social Scientific Python engineer & problem solver. Builder of communities and tools, including SciTools (Iris, cartopy), conda-forge, and former maintainer of matplotlib. Working on accelerator controls at CERN.
Charlie Marsh @crmarsh.com Building Astral: Ruff, uv, and other high-performance Python tools, written in Rust.
Vincent Maladiere @maggle.bsky.social Open source @Probabl.ai | skrub developer | interested in ML, survival analysis, causal inference, and data wrangling
Jannis Leidel @jezdez.dev 🐍 PSF chair & fellow.
🎁 conda and friends at Anaconda.
📦 PyPA & 🎷Jazzband founder.
🕸️ mozilla data, ✍️MDN & 🎻 Django alum.
🚲 Mobilitätswende jetzt!
He/him
Olivier Grisel @ogrisel.bsky.social Software engineer at probabl, scikit-learn contributor.
Also at:
https://sigmoid.social/@ogrisel
https://github.com/ogrisel
Reshama @reshamas.bsky.social • Statistician
• Data science / Open Source: @dataumbrella.org
• Videos: https://youtube.com/@dataumbrella
Simon Willison @simonwillison.net Independent AI researcher, creator of datasette.io and llm.datasette.io, building open source tools for data journalism, writing about a lot of stuff at https://simonwillison.net/
Jesper Dr.amsch @jesper.drams.ch I share non-hype ML & AI with 8+ years XP
🌦 Machine Learning at ECMWF
💾 Fellow at SSI
You miss 99% of benchmarks you don't overfit on!
🏳️🌈 they
@marcogorelli.bsky.social @marcogorelli.bsky.social Senior Software Engineer at Quansight Labs
Pretty focused on Narwhals and Polars these days, generally interested in dataframes and time series
Gaël Varoquaux @gaelvaroquaux.bsky.social Research & code: Research director @inria
►Data, Health, & Computer science
►Python coder, (co)founder of scikit-learn, joblib, & @probabl.bsky.social
►Sometimes does art photography
►Physics PhD
Hynek Schlawack @hynek.me Pythonista & PSF fellow 🐍🏆, Gopher 🐹, blogger 📝, speaker 📢, YouTuber 📺. ❤️ nuance & outcomes, 🗣️🇨🇿🇩🇪🇺🇸
• https://hynek.me/
• https://github.com/hynek
• https://www.youtube.com/@The_Hynek
• https://mastodon.social/@hynek
• https://x.com/hynek
Ferran Brosa Planella @brosaplanella.xyz 🔢 Applied mathematician.
🧑🏻🏫 Assistant Prof at the Warwick Mathematics Institute.
🔋 Co-Investigator at The Faraday Institution.
🧑🏽💻 Maintainer at PyBaMM.
🏭 Co-Founder of Ionworks.
🫓 Bagpiper, craft beer aficionado & homebaker.
He/him.
Open-Source Science (OSSci) @ossci.bsky.social A NumFOCUS initiative aimed at accelerating scientific research and discovery by improving the ways open source in science gets done. Learn more: https://opensource.science
Juan Luis @juanlu.space Posting about open source ecology, resisting AI, y política española. Software Engineer + DevRel at Canonical. Luddite. Proudly hosted on @eurosky.social 🇪🇺
#ADHDAwareness
matplotlib @matplotlib.org Python library for creating static, animated, & interactive visualizations. Chat w/ us @ https://discourse.matplotlib.org/
Sponsored by NumFocus
conda-forge @conda-forge.org A community led collection of recipes, build infrastructure and distributions for the conda package manager.
https://conda-forge.org
MyST Markdown @mystmd.org Markdown with superpowers for writing scientific 👨🔬 and technical 📈papers. #OpenSource & maintained by Project #Jupyter.
NetworkX @networkx.bsky.social Python package for the creation, manipulation, and study of the structure, dynamics, and functions of complex networks.