METR @metr.org METR is a research nonprofit that builds evaluations to empirically test AI systems for capabilities that could threaten catastrophic harm to society.- A Agriya Khetarpal @agriyakhetarp.al [I'm only sometimes active here] Luddite • Full-time Pythonista, part-time poet • @pyodide.org maintainer • @scipy.in organiser • OSS dev working on Scientific Python • 24 years old • Trying to change the world, one commit at a time.
Pavithra Eswaramoorthy @pavithraes.me DevRel at Quansight. Thinking about open source & community. 💜
(she/her)
Pierre-Olivier 🇺🇦🦊⚛️ @pierrotsmnrd.bsky.social 
pytest.org @pytest.org The pytest framework makes it easy to write small tests, yet scales to support complex functional testing for applications and libraries.
http://github.com/pytest-dev/pytest
Also on https://fosstodon.org/@pytest
Polars @pola.rs Dataframes powered by a multithreaded, vectorized query engine, written in Rust.
:probabl. @probabl.ai Own Your Data Science
https://probabl.ai
melissawm @melissawm.bsky.social Namesquatting. Follow me at https://pynews.com.br/@melissawm
Quansight @quansight.com Forging the bridge between enterprise innovation and open source sustainability.
Roman Yurchak @romanyurchak.bsky.social ML engineer & Founder at Symerio.
Previously core developer Pyodide, scikit-learn.
🇺🇦
Plotly @plotly.com Plotly builds data visualization tools and platforms for analysts, engineers, scientists, and coding agents you work with.
Biohub @biohub.org Combining frontier AI & frontier biology to help scientists cure or prevent disease
The Linux Foundation @linuxfoundation.org A nonprofit organization enabling mass innovation through open source. #linux #kubernetes #riscv #hyperledger #anuket #openssf #openjs #o3de and more!
merve @merve.bsky.social proud mediterrenean 🧿 open-sourceress at hugging face 🤗 multimodality, zero-shot vision, vision language models, transformers
Matt Harrison @dunder-matt.bsky.social Python and data corporate trainer, author, ...
@tommoral.bsky.social @tommoral.bsky.social 
Yann Lechelle @ylechelle.bsky.social Cofounding Executive President and Chairman at probabl.ai, the @scikit-learn.org company. Tech exec, repeat entrepreneur, advisor, angel investor. MBA @INSEAD. Plays 🏀
Rob Hyndman @robjhyndman.com Professor of Statistics, Monash University, Australia. FAA, FASSA. Interested in #forecasting, #rstats, #statistics. he/him http://robjhyndman.com
Max kuhn @topepo.bsky.social Writing modeling packages at @posit.co (née RStudio). Opinions are my own. https://max-kuhn.org/
🎉 Romain François 🦊 @romainfrancois.bsky.social tada⬢science ⬡⬡ ex(Posit/RStudio, ThinkR, Mango Solutions) ⬡⬡ role(Data Scientist, Software Engineer, R Expert) ⬡⬡
Jenny Bryan @jennybryan.bsky.social Software engineer @posit.co, humane #rstats
Hilary Parker @hspter.bsky.social Data Science advising / consulting. Formerly startup CTO, Data Science Biden 2020, Stitch Fix, Etsy. PhD JHU Biostar. Co-host Not So Standard Deviations podcast. 🥳😴🧘🐈⬛
Julia Silge @juliasilge.com Building data science tools @posit.co, #rstats, parenthood ✨📊✨
Jeremy Howard @howard.fm https://Answer.AI & https://fast.ai founding CEO; previous: hon professor @ UQ; leader of masks4all; founding CEO Enlitic; founding president Kaggle; various other stuff…
Mara Averick @dataandme.bsky.social open-source 🥑 dev advocate @quansight.com 💻 on @stdlib.io fmr: @rstudio, 🏀 hoop head, data-viz lover, gnashgab, blatherskite, doggos, horses
Thomas Lin Pedersen @thomasp85.com Visualisation and graphics @posit.co
Classic Generative Art Weirdo using 🖤 and R: http://thomaslinpedersen.art and http://deca.art/thomasp85
he/him
Richard McElreath 🐈⬛ @rmcelreath.bsky.social Anthropologist - Bayesian modeling - science reform - cat and cooking content too - Director @ MPI for evolutionary anthropology https://www.eva.mpg.de/ecology/staff/richard-mcelreath/
Emmanuelle Gouillart @emmagouillart.bsky.social Scientific director of Saint-Gobain Research Paris
Also open-source and scientific Python (scikit-image, plotly)
@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
Reshama @reshamas.bsky.social • Statistician
• Data science / Open Source: @dataumbrella.org
• Videos: https://youtube.com/@dataumbrella
Posit @posit.co We make free, open-source software for data scientists like the RStudio IDE.
We're formerly known as RStudio. You can always download our open-source IDE here. https://posit.co/download/rstudio-desktop/
Skrub @skrub-data.bsky.social skrub is a Python library to ease preprocessing and feature engineering for tabular machine learning.
Our long-term goal is to directly connect database tables to machine learning estimators.
https://skrub-data.org
https://discord.gg/ABaPnm7fDC
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.
Compute! Paris @computeparis.bsky.social 🇫🇷 The Compute! Paris conference.
November 25-26 2026 • Sorbonne Université
Real Python @realpython.com Online #Python Training & Expert Community: Tutorials, Video Courses, Books, Quizzes...and More! Join 1M+ Pythonistas at http://realpython.com
Balázs Kégl @balazskegl.bsky.social Head of AI Research @HuaweiFr.
Podcast: https://youtube.com/@I.scientist.balazskegl
Blogs: http://balazskegl.substack.com, https://medium.com/@balazskegl
X handle: balazskegl
Julien Jerphanion @jjerphan.xyz Computer Science • Applied Maths • Software • Progressive Music • Scientific Software Engineer @quantstack.bsky.social- C CuPy @cupy.bsky.social NumPy & SciPy for GPU.
🌐 https://cupy.dev/
🛠️ https://github.com/cupy/cupy
Mathieu Blondel @mblondel.bsky.social Research scientist, Google DeepMind
NetworkX @networkx.bsky.social Python package for the creation, manipulation, and study of the structure, dynamics, and functions of complex networks.- N NumPy @numpy.bsky.social
Data Umbrella @dataumbrella.org ◈ community
◈ data science & open source
◈ videos: https://youtube.com/@dataumbrella
◈ events: https://meetup.com/data-umbrella
◈ news: dataumbrella.substack.com/
Norbert Preining @npreining.bsky.social Principal Software Engineer at arXiv.org
Mathematician, Logician, Computer Scientist, TeX Maniac, Linux Dev, Professional Mountain Guide
Tim Head @betatim.bsky.social Trained scientist building software. Also: hike, bike, run, swim, ski, pizza
Sylvain Corlay @sylvaincorlay.bsky.social @QuantStack.bsky.social founder
@jupyter.org maintainer
@computeparis.bsky.social organizer
ACM software system award 2017.
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/
MyST Markdown @mystmd.org Markdown with superpowers for writing scientific 👨🔬 and technical 📈papers. #OpenSource & maintained by Project #Jupyter.
Quentin Bertrand @quentinbertrand.bsky.social Machine Learning Researcher at Inria
NeurIPS Conference @neuripsconf.bsky.social San Diego Dec 2-7, 25 and Mexico City Nov 30-Dec 5, 25. Comments to this account are not monitored. Please send feedback to townhall@neurips.cc.
Sarah Andersen @sarahseeandersen.bsky.social No NFTs, No A.I.
linktr.ee/sarahcandersen
Tom Augspurger @tomaugspurger.net 
Ana Luísa Pinho @analupinho.bsky.social BrainsCAN Postdoctoral Fellow in cognitive computational neuroscience and neuroimaging focused in fMRI, brain atlasing, machine learning, open science, music cognition & gender equity.
Demian Wassermann @demw.bsky.social Research Director @ Inria
Adjunct Scientific Director @ DataIA institute, Université Paris-Saclay
http://pages.saclay.inria.fr/demian.wassermann/
Women in Machine Learning & Data Science Paris @wimlds-paris.bsky.social Paris Women in Machine Learning & Data Science chapter | 2019 Science & Research Award.
Nicolas Hug @nicolashug.bsky.social Open Source ML Engineer. PyTorch.
Pierre Ablin @pierreablin.bsky.social Research scientist at Apple | machine learning, optimization, language modeling
pierreablin.com
Timnit Gebru @timnitgebru.blacksky.app Personal Account
Author: Deep Unlearning (you can now preorder at https://shorturl.at/sCdjl)
Founder: The Distributed AI Research Institute (https://dair-institute.org)
Julia Evans @b0rk.jvns.ca programming and exclamation marks
blog: jvns.ca
zines: wizardzines.com
Carol Willing @willingc.bsky.social Python is forever🐍
Chris Albon @chrisalbon.com 
David Smith @nonfamous.bsky.social Developer Relations for AI at Microsoft/GitHub. he/him
Paige Bailey (webpaige.dev) @dynamicwebpaige.bsky.social ✨ Keep it simple, make it scale. AI should be about empowering users and building understanding. 👩💻 AI Developer Experience @ Google DeepMind, ex-Github, ex-Google
Peter W🤓 @wang.social Anaconda Founder&Head of AI; created the PyData movement, PyScript, Bokeh, Datashader; Fellow @ Python Software Foundation; Center for Humane Tech
Game~B; Physics, Cybernetics, Memetics. A student of the human condition.
Memento mori
Sebastian Raschka (rasbt) @rasbt.bsky.social ML/AI researcher & former stats professor turned LLM research engineer. Author of "Build a Large Language Model From Scratch" (https://amzn.to/4fqvn0D) & reasoning (https://mng.bz/Nwr7).
Also blogging about AI research at magazine.sebastianraschka.com.
Katie Mack @astrokatie.com Cosmologist, pilot, author, connoisseur of cosmic catastrophes. TEDFellow, CIFAR Azrieli Global Scholar. Domain verified through my personal astrokatie.com website. She/her. Dr.
Personal account; not speaking for employer or anyone else.
Mariatta @mariatta.ca Python Core Developer. F"Yes!" 🐍🇨🇦
#PyPodcats
#PyCon US Chair 2023-2024.
PSF Fellow Member & Community Service Award recipient.
Keynote speaker.
Foodie. Traveler. Picky eater.
Opinions are mine.
#Python #PyLadies #kdrama
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 🧪
Project Jupyter @jupyter.org Multi-language interactive computing environments. Jupyter Notebook, JupyterLab and related projects – @mentions not monitored. Open issues on GitHub.
GitHub @github.com The AI-powered developer platform to build, scale, and deliver secure software.
Michał (Mike) Krassowski @krassowski.bsky.social Maintainer of JupyterLab. DPhil in omics/endometriosis - I miss research. Thinking how to leave the world a better place.
Hannah @story645.bsky.social graduate student studying visualization (CS) @thegraduatecenter.bsky.social & @matplotlib.org community manager
Dr Di Cook @visnut.bsky.social Professor. Statistical graphics, EDA, data science, open source and R. Gender equity. she/her
David Robinson @drob.bsky.social Member of Technical Staff at Anthropic. #rstats fan. Dad x2. He/him
Hadley Wickham @hadley.nz R, data, 🐕, 🍸, 🌈. He/him.
PyLadies Bot @pyladies-bot.bsky.social Sharing content by PyLadies and promoting greater diversity in the #python community 💙💛
[still experimental]
RLadies+ Bot @rladies-bot.bsky.social Sharing content by RLadies+ and promoting greater diversity in the #rstats community 💜
[still experimental]
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
Talley Lambert @talley.codes Microscopist & Python developer at Harvard Med. Creator @fpbase.org
Aaron Meurer @asmeurer.com Posting about AI, Python, SymPy, and other nonsense.
asmeurer.com
Juanita Gomez @juanitagomezr.bsky.social 👩🏫 PhD student at UCSC,👩💻Community Manager at Scientific Python, Mathematician, open source advocate, singer and dancer 🤓🧡🎵💃🇨🇴
Jake VanderPlas @jakevdp.bsky.social Write code. Mostly Python.
Madicken Munk @madickenmunk.bsky.social I like coffee, cats, scientific computing, and nuclear engineering. Assistant Professor at Oregon State University. 
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
Kyle Harrington @kyleharrington.com Images, AI, ML, and ALife.
Former: @hampshirecolg
@brandeisuniversity.bsky.social
@harvardmed.bsky.social
@uidaho.bsky.social
@hhmijanelia.bsky.social
@mdc-berlin.bsky.social
@ORNL.
Now @biohub.org.
Opinions are mine.
@pyladiescon.bsky.social @pyladiescon.bsky.social 
Hugging Face @hf.co The AI community building the future! 
The Carpentries @carpentries.carpentries.org The Carpentries: Software Carpentry, Data Carpentry and Library Carpentry. An open global community teaching the skills and perspectives to turn data into knowledge
Marc Garcia @datapythonista.bsky.social Open source and Python: pandas core developer, PSF fellow, former EuroSciPy co-organizer, NumFOCUS community award. https://datapythonista.me
@glemaitre58.bsky.social @glemaitre58.bsky.social 
Juan Nunez-Iglesias @jni.fosstodon.org.ap.brid.gy Core dev and co-founder napari.org
Core dev scikit-image.org
Co-author elegant-scipy.org
Research Fellow at https://www.monash.edu/researchinfrastructure/eresearch […]
[bridged from https://fosstodon.org/@jni on the fediverse by https://fed.brid.gy/ ]
scikit-learn @scikit-learn.org Machine learning in Python • Open Source
https://scikit-learn.org
Talk Python Podcast @talkpython.fm The #1 Python-focused podcast covering the people and ideas in Python. Created and hosted by @mkennedy.codes. Get all the episodes at https://talkpython.fm/episodes/all
Margaret Mitchell @mmitchell.bsky.social Researcher trying to shape AI towards positive outcomes. ML & Ethics +birds. Generally trying to do the right thing. TIME 100 | TED speaker | Senate testimony provider | Navigating public life as a recluse.
Former: Google, Microsoft; Current: Hugging Face
QuantStack @quantstack.bsky.social A team of open-source maintainers and engineers providing solutions and support for open-source projects used by millions worldwide. #Jupyter, #condaforge, #Mamba, #ApacheArrow, #Xtensor, and more.
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
Tania Allard @ixek.bsky.social Director Quansight Labs
✨ MLOps, OSS, Research Software Engineering
🚀 GDE - ML @ Google | PSF fellow and vice-chair of the board of directors
Pyladies Global Council
🌱 Disability justice activist, feminist, neurodivergent, developer 
Olivier Grisel @ogrisel.bsky.social Software engineer at probabl, scikit-learn contributor.
Also at:
https://sigmoid.social/@ogrisel
https://github.com/ogrisel