NumFOCUS

Another great opportunity from Dynare! Learn more about the 5th Dynare Workshop for Advanced Users in Ispra with the post below!

Give Me 5 Season 2 is back with Episode 2 this week, featuring @dbouquin.bsky.social, the Senior Developer Relations Engineer from Anaconda! We'll be dropping the episode later this week, so stay tuned!

Maxed-Out Moment — CuPy 60 million downloads in 2025. This is what funded open source looks like. Give today to support the next milestone: numfocus.org/max-the-stack

Season 2 of Give Me 5 is LIVE. First up: @howardbutler.com on why open source software is foundational for modern AI. Watch now → youtu.be/gFzNCoQaBfo

Give Me 5 is back in a few ways. $50 + tagging 5 friends = open source stays alive Who’s in? Tag your first 5 below ↓ Donate: numfocus.org/max-the-stack

Support the NumFOCUS stack today. 15 days to fund keep the open-source tools you rely on healthy, maintained, and free. If you’ve ever typed `import numpy` and meant it — this one’s for you. numfocus.org/max-the-stack

We're excited to launch Season 2 of Give Me 5 by talking with @howardbutler.com, the Sponsorship Program Lead for @GDAL, a NumFOCUS Sponsored Project. The new season drops with episode one next week, so stay tuned!

Give Me 5: Season 2 incoming... We're coming back with new episodes — real conversations with open source experts and advocates who are shaping the future of scientific computing. Watch the Season 2 trailer: youtu.be/T--NONuTXo4 — Interested in partnering: partnership@numfocus.org

We have a new round of project updates to kick off the new year! Check out the updates on the NumFOCUS blog at hubs.la/Q040Wf_l0. This month features updates from: pandas ITK geopandas @julialang.org @cupy.bsky.social @ropensci.org @projectpythia.bsky.social @optuna.bsky.social Taskflow

Version 4.9 of MFEM was just released on December 11, 2025! Highlights of this release include ∂FEM: a new MFEM capability for Automatic Differentiation (AD) of nonlinear finite element operators, and much more. All changes can be found here: github.com/orgs/mfem/di...

We are happy to announce the first release candidate of pandas 3.0.0 was released! You can find the the list of changes in 3.0.0 in the release notes page here: pandas.pydata.org/docs/dev/wha...

December was an exciting month for rOpenSci! They proudly continued supporting LatinR as a community partner in 2025, and their community manager, Yani, was recently interviewed on our new NumFOCUS podcast, Give Me 5! You can watch the 5-minute episode now: youtu.be/SqafLv6CYPI?...

skforecast 0.19.0 has just been released! This release expands skforecast into new types of forecasting problems, strengthens drift detection, & introduces a dedicated statistical modeling module fully aligned with the scikit-learn interface. Get the full details here: skforecast.org/0.19.0/relea...

rOpenSci published a blog post requesting feedback for a prototype of an organization-level dashboard for tracking the health and maintenance of an organization’s R packages. They’re still looking for feedback and suggestions, so please read and help out with your ideas! ropensci.org/blog/2025/09...

Optuna released v4.6! This version delivers significant enhancements to both user experience and optimization power. Key highlights include an interactive, LLM-powered interface for Optuna Dashboard, enabling users to filter trials and generate graphs w/ natural language. medium.com/optuna/annou...

Python-Blosc2 3.11.1 is here! After three months of intense work, they’ve unleashed a release that represents a massive leap forward in their support for the Array API standard. Blosc is achieving unprecedented performance! Get the full story on Blosc’s blog: www.blosc.org/posts/tensor...

Introducing NumFOCUS’s newest Affiliated project, BrainGlobe! brainglobe.info BrainGlobe is a project to build interoperable tools for the analysis and visualization of neuroscience histology data. It includes ten user-facing data processing packages. Welcome to the NumFOCUS family!

Please welcome our newest Sponsored project, OpenProblems.bio! 💙 openproblems.bio OpenProblems.bio is a community-driven project aiming to identify and benchmark computational methods for analyzing single-cell data, with a goal to accelerate progress in single-cell research. Welcome to NumFOCUS!

Open-source thrives because people show up. Today, on Giving Tuesday, we’re calling on our whole community — developers, scientists, students, organizers, and supporters. Let’s push this campaign into maximum overdrive. Donate to support open science at numfocus.org/max-the-stack

Giving Tuesday is here — time to Max the Stack. Let’s sustain the tools powering global discovery. Donate today at numfocus.org/max-the-stack #NumFOCUS #MaxTheStack

It’s been an exciting month for us and our projects yet again! Check out our roundup of November Project Updates, including two brand new NumFOCUS projects! numfocus.medium.com/34ec15fef155

A huge thank-you to @blockscience.bsky.social for their support of NumFOCUS and PyData.Their commitment to rigorous research and community-driven innovation strengthens every part of the ecosystem. Join in their support of open source scientific computing: Donate to NumFOCUS at hubs.la/Q03VFBdL0

Optuna v4.6 is scheduled for release next month! It will include full support for multi-objective and constrained optimization in AutoSampler, automatic plot generation using LLM in Optuna-Dashboard, and more.

We are happy to announce the release of Colour — CxF! This extension package for Colour implements reading and writing files in the Color Exchange Format (CxF) to store and exchange color data across different systems. Read the full announcement here: www.colour-science.org/posts/suppor...

Skforecast 0.18.0 is here! 🎉 This release brings backtesting with more control, drift detection for production, better visualization and insights, and much more to make your forecasting pipelines more reliable, interpretable, and production-ready! Full release notes: skforecast.org/0.18.0/relea...

rOpenSci recently hosted another Coworking session, this time focusing on the theme “Code Review with rOpenSci” with community host Liz Hare, rOpenSci Champion and Software Reviewer. Tune into their next session, “Getting to know The Carpentries” on Dec. 2! ropensci.org/events/cowor...

Exciting news from @astropy.org! The redesigned Learn.Astropy.org is live! Explore tutorials blending Python + astronomy — from FITS files to orbit simulations. Learn more on the NumFOCUS blog at bit.ly/48hlBNI

ICYMI: Julia version 1.12 has been released! julialang.org/blog/2025/10... We want to thank all the contributors to this release and all the testers who helped find regressions and issues in the pre-releases. Without you, this release would not have been possible! 💜

Announcing C-Blosc2 2.21.2: A fast, compressed and persistent binary data store library for C! This is a maintenance release, with a few fixes and some optimizations. Check out the full release notes here: github.com/Blosc/c-blos... Donate to Blosc: numfocus.org/donate-to-bl...

💙 pyMOR just released pyMOR 2025.1! This release introduces a major breaking change in pyMOR’s VectorArray API, along with a few new features. Check them out here: bit.ly/42LU7gh

Recently, rOpenSci held some fabulous community sessions on new ways to publish R packages and how to ship your R package to the R-multiverse! Stay up to date on their next events here: ropensci.org/events/ 💯 Donate to rOpenSci: numfocus.org/donate-to-ro...

On behalf of the Spyder Project Contributors, we’re pleased to announce that Spyder 6.0.8 has been released and is available for Windows, GNU/Linux and MacOS X! 🕷️ This release fixed input method positioning for the Editor and IPython Console. Donate to Spyder: numfocus.org/donate-for-s...

Optuna has released CARBOSampler, a sampler for robust Bayesian optimization, and the C-DTLZ constrained multi-objective optimization benchmark set packages on OptunaHub. They are also working on Optuna-Dashboard LLM integration functionalities that manipulate data with natural language. Good luck!😍

On behalf of the NumPy team, we’re pleased to announce the release of NumPy 2.3.3. The NumPy 2.3.3 release is a patch release split between a number of maintenance updates and bug fixes. This release supports Python 3.11–3.14. 🩵

A Zarr Summit is currently being hosted in Rome, Oct. 13-17, 2025! Zarr currently has over 60 registrants representing 50+ organizations, 5+ continents, and Zarr usage across Python, R, C++, Rust, APIs, GUIs, and more! 🤩🐍🔬

Mesa had an exceptional Google Summer of Code (GSoC)! With its completion, they have three exciting improvements to Mesa: Mesa Frames 0.2, Mesa-LLM, & Mesa 3.3, This is incredible, congrats Mesa!

The 4th Dynare Workshop for Advanced Users took place from Sep. 17-19, 2025, at the Joint Research Centre of the European Commission in Ispra, Italy. The Dynare Team showcased their latest software developments alongside participants from policy institutions and academia. Congrats, Dynare! 💙

Julia version 1.11.7, the seventh patch release in the 1.11 series, is now available! As a patch release, 1.11.7 contains no new features or breaking changes, only bug fixes, documentation improvements, and performance improvements. 🙏

We can’t wait for the 10th-anniversary PyBay 2025 NEXT WEEK! Join NumFOCUS and connect with developers and programmers in the Bay Area for all things Python! pybay.org

The Hopsworks Feature Store Summit 2025 takes place in just a week, and we couldn’t be happier to be a featured community partner! 🧡 This year, the summit will focus on real-time systems, LLM pipelines, and vector-native architectures for AI. Register here for free! www.featurestoresummit.com

We’re proud to partner with Hopsworks for their Feature Store Summit 2025, which will take place online on Oct. 14! We’ve got a star-studded speaker lineup, with talks from developers at Uber, Pinterest, and Roku, just to name a few! Register here: www.featurestoresummit.com

NumFOCUS is thrilled to partner with PyBay for their 10th anniversary conference in San Francisco, Oct. 18! Join us and dozens of other enthusiastic and established developers in the beautiful Bay Area for software development, data science, community, and of course: Python! pybay.org

Our September round of monthly project updates is here! Check ‘em out here: numfocus.medium.com/september-20...

Our September round of monthly project updates is here! Check ‘em out here: numfocus.medium.com/september-20...

Funding fuels innovation. NumFOCUS helps projects find stability through sponsorship + grants. Your gift keeps open code powering science. Back the Stack. Fuel the Future: bit.ly/3HPryqN

pandas is pleased to announce the release of v2.3, and is seeking testers for their upcoming 3.0 release! See the upcoming changes in pandas 3.0 for more details about what changes are coming: pandas.pydata.org/docs/whatsne... Donate to pandas: numfocus.org/donate-to-pa...

📣 On Sept. 25, NVIDIA will be hosting a virtual Connect with Experts with the CUDA Core Libraries Team. If you have ever wanted to learn about GPU computing and writing custom CUDA kernels in both C++ and Python, this is the team you want to talk to! bit.ly/4nxkChk

We have released version 4.5 of the black-box optimization framework Optuna. This release includes new features and significant performance improvements, such as GPSampler for constrained multi-objective optimization and much more! Full release notes here: github.com/optuna/optun...

Tomorrow is Software Freedom Day! 🧠 Here at NumFOCUS, we've seen the impact of open-source extend as far as [BioTech] [Sustainability] [AI] Knowledge and data should remain free and accessible for all. Back the Stack by donating today to ensure the future of open-source! bit.ly/3HPryqN

One month ago, Blosc presented multiple exciting talks, tutorials, and sprints at EuroSciPy 2025! Check out the slides to their Talk, “Blosc2: Compress Better, Compute Bigger,” here! www.blosc.org/docs/2025-Eu... Donate to Blosc: numfocus.org/donate-to-bl...