All blog posts featured by QuantStack team

JupyterLite 0.8 is released! 🎉

Jeremy Tuloup — Fri, 10 Jul 2026 00:00:00 GMT

The new 0.8 release includes a number of new features, bug fixes, and enhancements. Highlights include a shareable REPL, a refreshed loading screen, file system reliability improvements, a terminal in the browser, and an update to JupyterLab 4.6 and Notebook 7.6.

Congratulations, Distinguished Contributors!

Johan Mabille — Wed, 24 Jun 2026 00:00:00 GMT

We are proud to announce the recipients of the Jupyter Distinguished Contributor (JDC) award for the 2025 cohort of contributors.

Improving SIMD in Apache Arrow: 80% faster Parquet column reads on ARM

Antoine Prouvost — Thu, 11 Jun 2026 00:00:00 GMT

We accelerated Parquet column reads on ARM by up to 80% in Apache Arrow C++, by adding support for the Scalable Vector Extension (SVE) and fixing a compiler optimization issue worth a 5x speedup on a dedicated routine.

Async Xeus Python

Thorsten Beier — Wed, 10 Jun 2026 00:00:00 GMT

We added top-level await support to xeus-python 🚀. You can now use toplevel async code directly in notebooks without extra boilerplate and without blocking the kernel.

Sharded Repodata Support in Mamba

Julien Jerphanion — Wed, 29 Apr 2026 00:00:00 GMT

We are thrilled to introduce Mamba 2.6, the first release of the package manager with support for sharded repodata, improving perfomance by a large factor, both in execution time and memory consumption.

Introducing Sparrow-IPC: A modern C++ implementation of Arrow IPC

Hind Montassif, Alexis Placet, Johan Mabille — Sat, 04 Apr 2026 00:00:00 GMT

If you work in the world of data engineering, you are probably familiar with Apache Arrow — the universal columnar format and multi-language toolbox that has become the gold standard for fast in-memory analytics and data interchange.

How notebook.link Scales Without Backends

Sylvain Corlay — Fri, 27 Mar 2026 00:00:00 GMT

Notebook.link combines WebAssembly and the conda ecosystem to deliver scalable, serverless computing environments that run entirely in the browser.

Faster Reads for Apache Parquet: Improving Integer Unpacking

Antoine Prouvost — Mon, 16 Mar 2026 00:00:00 GMT

By rewriting the SIMD optimizations of a critical low-level algorithm in Arrow C++, we have been able to deliver substantial speedups when reading Parquet data, up to 60% on some Arrow benchmarks with specific column encodings.

Expanding Geospatial Workflows in JupyterGIS: STAC Browsing and Story Maps

Gregory Mooney — Thu, 19 Feb 2026 00:00:00 GMT

We introduce two new JupyterGIS features: a STAC browser integrated directly into JupyterGIS, and a new Story Map feature, which makes it possible to combine maps and narrative content in a single, interactive view.

JupyterLite Officially Joins Project Jupyter

Jérémy Tuloup, Sylvain Corlay, Fernando Pérez — Thu, 12 Feb 2026 00:00:00 GMT

We are thrilled to announce that JupyterLite is now an official part of Project Jupyter. This milestone marks a significant step forward for interactive computing in the browser and strengthens JupyterLite’s role within the Jupyter ecosystem.

Instantly view Parquet files in JupyterLab with Arbalister

Antoine Prouvost — Thu, 29 Jan 2026 00:00:00 GMT

Arbalister is a JupyterLab extension that enables seamless viewing of many tabular file formats, including Parquet, CSV, Avro, ORC, and SQLite.

Introducing notebook.link: The Future of Notebook Sharing

QuantStack — Thu, 22 Jan 2026 00:00:00 GMT

We are excited to unveil notebook.link, a groundbreaking platform that simplifies sharing and running notebooks like never before.

JupyterLite 0.7 is released! 🎉

Jeremy Tuloup — Thu, 04 Dec 2025 00:00:00 GMT

The new 0.7 release includes a number of new features, bug fixes, and enhancements. This release also brings significant improvements to the user experience and new customization options for JupyterLite deployments.

Teaching a Billion People to Code: How JupyterLite Is Scaling the Impossible

Michelle Gienow — Mon, 01 Dec 2025 00:00:00 GMT

QuantStack, an “almost accidental startup,” is building a serverless distro of JupyterLab for Jupyter’s global adoption.

JupyterLab 4.5 and Notebook 7.5 are available!

Jeremy Tuloup — Mon, 24 Nov 2025 00:00:00 GMT

JupyterLab 4.5 has been released! This new minor release of JupyterLab includes 51 new features and enhancements, 81 bug fixes, 44 maintenance tasks and 38 documentation improvements.

GNU Octave Meets JupyterLite: Compute Anywhere, Anytime!

Isabel Paredes — Thu, 16 Oct 2025 00:00:00 GMT

We are thrilled to announce the newest member of our JupyterLite kernel ecosystem: Xeus-Octave. Xeus-Octave allows you to run GNU Octave code directly on your browser.

JupyterGIS breaks through to the next level

Martin Renou, Arjun Verma, Gregory Mooney, Sylvain Corlay — Thu, 16 Oct 2025 00:00:00 GMT

Launched in June 2024, JupyterGIS was introduced as a collaborative, web-based GIS environment built on the JupyterLab framework. Its objective is to bring QGIS-inspired workflows into the browser…

Sovereign Tech Agency Invests in Apache Arrow’s Future with QuantStack

Antoine Pitrou, Raúl Cumplido — Tue, 07 Oct 2025 00:00:00 GMT

We are thrilled to announce that the Sovereign Tech Fund is providing critical funding to sustain and improve Apache Arrow, an essential open-source project in the modern data ecosystem.

From Linux Parties to Global Impact: An Interview with Sylvain Corlay, Founder of QuantStack

Sylvain Corlay, Arthur Vervaet — Thu, 18 Sep 2025 00:00:00 GMT

In today’s article, we had the chance to speak with Sylvain Corlay, long-time contributor of the Jupyter project, used by millions of people worldwide, and CEO-founder of QuantStack, an open-source development company employing around thirty people.

A Year in Review: QuantStack’s Contributions to Apache Arrow

Antoine Pitrou, Raúl Cumplido — Tue, 02 Sep 2025 00:00:00 GMT

Since November 2024, QuantStack has been involved in the maintenance and development of Apache Arrow. We have a team of several engineers working…

Create your own layers in JupyterGIS

David Brochart — Wed, 25 Jun 2025 00:00:00 GMT

JupyterGIS-tiler is a JupyterGIS extension that lets you use a notebook to process your (Xarray) data and make it available as raster tiles, so that it can be visualized in JupyterGIS.

C++ in Jupyter — Interpreting C++ in the Web

Anutosh Bhat, Vassil Vassilev — Thu, 19 Jun 2025 00:00:00 GMT

Scientists and engineers utilize programming languages not only to build software systems but also to drive interactive exploratory workflows. They leverage developer tools to explore and reason through problems effectively.

JupyterLite 0.6.0 is released! 🎉

Jeremy Tuloup — Thu, 12 Jun 2025 00:00:00 GMT

The new 0.6.0 release includes a number of new features, bug fixes, and enhancements. This release also brings significant improvements to the user experience and new customization options for JupyterLite deployments.

JupyterLab 4.4 and Notebook 7.4 are available!

Jeremy Tuloup — Wed, 21 May 2025 00:00:00 GMT

JupyterLab 4.4 has been released! This new minor release of JupyterLab includes 28 new features and enhancements, 76 bug fixes, 63 maintenance tasks and 34 documentation improvements.

Congratulations, Distinguished Contributors!

Johan Mabille — Thu, 15 May 2025 00:00:00 GMT

We are proud to announce the recipients of the Jupyter Distinguished Contributor (JDC) award for the 2024 cohort of contributors.

Making Qt collaborative using CRDTs

David Brochart — Mon, 31 Mar 2025 00:00:00 GMT

A journal on creating a collaborative application with Qt

R in the Browser: Announcing Our WebAssembly Distribution

Isabel Paredes — Fri, 28 Feb 2025 00:00:00 GMT

R is now available in emscripten-forge, enabling the Xeus-R kernel in JupyterLite.

Real-time collaboration and collaborative editing for GIS workflows with Jupyter and QGIS

Wed, 26 Feb 2025 00:00:00 GMT

We are excited to announce JupyterGIS, a web-based, collaborative, and extensible interface for GIS, leveraging the JupyterLab application framework and integrating seamlessly with the Jupyter notebook interface.

PyData Paris 2025 Keynotes

Sandrine Pataut — Wed, 19 Feb 2025 00:00:00 GMT

We are thrilled to announce the keynote speakers for the upcoming PyData Paris 2025, the leading gathering of the open-source data science and AI/ML community in France.

Announcing JupyterCAD 3.0

Arjun Verma, Trung Le, Martin Renou — Mon, 17 Feb 2025 00:00:00 GMT

We are thrilled to introduce JupyterCAD 3.0, the newest version of the collaborative CAD modeler designed for JupyterLab.

Sparrow

Johan Mabille, Alexis Placet, Thorsten Beier, Joël Lamotte — Fri, 31 Jan 2025 00:00:00 GMT

We are thrilled to introduce Sparrow, a new library designed to simplify the integration of Apache Arrow’s columnar format into C++ applications.

JupyterLite Terminal

Ian Thomas — Wed, 13 Nov 2024 00:00:00 GMT

QuantStack are delighted to announce that we have been working on a new Terminal for JupyterLite.

Automate your releases with the Jupyter Releaser 🚀

Jeremy Tuloup — Mon, 28 Oct 2024 00:00:00 GMT

Jupyter Releaser is an automation tool developed by the Jupyter team to streamline and standardize the release process across Jupyter projects.

QuantStack Steps Up to Support Apache Arrow with New Dedicated Team

Sylvain Corlay — Tue, 22 Oct 2024 00:00:00 GMT

We are thrilled to announce that QuantStack is starting a new team dedicated to the maintenance and development of Apache Arrow.

Interactive Mapping with ipyopenlayers

Nour Cheour — Fri, 06 Sep 2024 00:00:00 GMT

In this article, we present the main features of ipyopenlayers and demonstrate how this library can transform your geospatial data into dynamic, interactive visualizations.

Announcing the 2023 cohort of Jupyter distinguished contributors

Johan Mabille, on behalf of the Jupyter Distinguished Contributors — Wed, 04 Sep 2024 00:00:00 GMT

We are delighted to announce the recipients of the Jupyter Distinguished Contributor (JDC) award for the 2023 cohort.

Ipydatagrid is now part of Project Jupyter

Sylvain Corlay, on behalf of the Jupyter Widgets Council — Thu, 22 Aug 2024 00:00:00 GMT

Today, we are proud to announce that the ipydatagrid open source project has been incorporated into Project Jupyter as part of the Jupyter Widgets subproject.

Introducing Mamba 2.0

Antoine Prouvost, Joël Lamotte, Johan Mabille, Hind Montassif — Tue, 16 Jul 2024 00:00:00 GMT

We are excited to present the first release candidate of Mamba 2.0, a significant upgrade to the mamba package manager. This update brings considerable enhancements for both users and developers, following an extensive year-long development effort.

QuantStack open-source internship program

Sylvain Corlay — Tue, 09 Jul 2024 00:00:00 GMT

Today, we are announcing a new internship program that aims to empower a new cohort of open-source contributors and future maintainers to make an impact within our ecosystem.

JupyterCAD 2.0

Trung Le, Martin Renou — Fri, 05 Jul 2024 00:00:00 GMT

We are thrilled to introduce JupyterCAD 2.0, the newest version of the JupyterLab-based CAD modeler.

JupyterGIS

Sylvain Corlay, Anne Fouilloux, Monika Weissschnur — Wed, 12 Jun 2024 00:00:00 GMT

We are thrilled to announce that the European Space Agency (ESA) is funding our proposal “Real-time collaboration and collaborative editing for GIS workflows with Jupyter and QGIS.”

Commit!

Sylvain Corlay — Wed, 29 May 2024 00:00:00 GMT

Open-source projects are not just about the latest exciting updates and features, but also the principles and people that drive these projects to success. In this blog post, I reflect on the dynamics…

In memoriam: Fanny Loustau Chartez

Sylvain Corlay — Thu, 16 May 2024 00:00:00 GMT

It is with great sadness that we announce the passing of our colleague and friend, Fanny Loustau Chartez, who served as the Chief Financial Officer of QuantStack since 2021.

Announcing PyData Paris 2024

Sylvain Corlay — Mon, 11 Mar 2024 00:00:00 GMT

We are thrilled to announce the upcoming PyData Paris 2024, the gathering of the open-source data science and AI/ML community in France. PyData Paris will take place at the Cité des Sciences from September 25 to September 26, 2024.

Meet Xeus-R: a future-proof Jupyter kernel for R

Romain François — Mon, 22 Jan 2024 00:00:00 GMT

Today, we, a collaborative team led by Romain François and supported by QuantStack, are thrilled to announce the initial release of Xeus-R, a future-proof Jupyter kernel for R.

QuantStack: 2023 in review

Sylvain Corlay — Wed, 03 Jan 2024 00:00:00 GMT

Since QuantStack was founded in 2016, we have remained committed to releasing our work under permissive open-source licenses. Here are some highlights of the 2023 achievements. Buckle up!

Recent keyboard navigation improvements in Jupyter

Nicolas Brichet, Gabriel Fouasnon — Sat, 16 Dec 2023 00:00:00 GMT

Upcoming versions of JupyterLab (4.1.0) and Notebook (7.1.0) will include major keyboard accessibility fixes.

And Voici!

Trung Duc Le, Martin Renou — Wed, 06 Dec 2023 00:00:00 GMT

Voici (meaning “here is” in French) is a novel project reshaping Jupyter-based interactive dashboards by combining Voilà and JupyterLite features. It facilitates the creation of dynamic, in-browser environments for data visualization and exploration.

Plug your application into the Jupyter world

David Brochart — Mon, 23 Oct 2023 00:00:00 GMT

Kernels are a simple but powerful abstraction in the Jupyter architecture. They encapsulate language interpreters and make them accessible through a standardized interface. This is the key to…

Voilà 0.5 - Homecoming

Jeremy Tuloup, Martin Renou, Trung Duc Le — Mon, 25 Sep 2023 00:00:00 GMT

Following the launch of Jupyter Notebook 7, it is now Voilà’s turn to join the JupyterLab family. In Version 0.5.0, the front-end of Voilà has been rebuilt from scratch using JupyterLab 4.0 components, just like in the case of Notebook 7.

Announcing Jupyter Notebook 7

Jeremy Tuloup — Wed, 26 Jul 2023 00:00:00 GMT

Jupyter Notebook 7 is the most significant release of the Jupyter Notebook in years. Some highlights of this release include real-time collaboration, interactive debugging, table of contents, theming and dark mode, internationalization, improved accessibility, compact view on mobile devices.

🎉 JupyterCon 2023 recordings now live on YouTube! 🎉

Gayle Ollington, Sylvain Corlay — Sat, 22 Jul 2023 00:00:00 GMT

Get ready to relive the magic of JupyterCon 2023, because the long-awaited moment is finally here! The JupyterCon YouTube channel has just dropped a treasure trove of content — all the talk and keynote recordings from the most epic conference of the year.

A theme editor for JupyterLab

Florence Haudin — Mon, 19 Jun 2023 00:00:00 GMT

To lower the bar for customizing JupyterLab we created a new tool providing a simple interface for tuning the JupyterLab appearance interactively.

Collaborative CAD in JupyterLab

Duc Trung Le, Martin Renou — Fri, 02 Jun 2023 00:00:00 GMT

Introducing JupyterCAD, a tool that integrates Computer-Aided Design (CAD) capabilities into JupyterLab.

Congratulations, Distinguished Contributors!

Johan Mabille — Fri, 02 Jun 2023 00:00:00 GMT

We are proud to announce the recipients of the Jupyter Distinguished Contributor (JDC) award for the 2022 cohort of contributors.

Embed interactive itkwidgets 3D renderings into JupyterLite deployments

Matt McCormick, Brianna Major, Jeremy Tuloup, Wei Ouyang, Stephen Aylward — Wed, 15 Mar 2023 00:00:00 GMT

A tutorial that demonstrates a zero-server, interactive 3D rendering notebook and walks through the quick and easy configuration that can be customized to your needs.

Improving the accessibility of Jupyter

Fri, 24 Feb 2023 00:00:00 GMT

This article presents some of the recent accessibility improvements in the Jupyter Notebook codebase.

A Jupyter kernel for GNU Octave

Giulio Girardi, Antoine Prouvost — Wed, 11 Jan 2023 00:00:00 GMT

We are happy to announce the xeus-octave project, a Jupyter kernel for GNU Octave. Xeus-octave was created by Giulio Girardi, recently joined by Antoine Prouvost - and has been incorporated into the Project Jupyter governance.

QuantStack: 2022 in review

Sylvain Corlay — Mon, 26 Dec 2022 00:00:00 GMT

2022 was an amazing year of innovation for the open-source developers at QuantStack. Developments range from major improvements to the Jupyter project to the packaging ecosystem and high-performance computing.

Managing conflicts with Mamba

Antoine Prouvost — Tue, 29 Nov 2022 00:00:00 GMT

A key aspect of package management is finding a set of compatible versions of the required packages. Indeed, even in the case when few packages are explicitly required, second-order dependencies may…

JupyterCon is back in 2023

Gayle Ollington — Mon, 17 Oct 2022 00:00:00 GMT

JupyterCon 2023 will be held May 10–12 (Thursday to Friday) in the city of light, Paris, France at the largest science museum in Europe, the Cité des Sciences et de l’Industrie.

Accelerating JupyterLab

Frédéric Collonval, Johan Mabille, David Brochart, Afshin Darian — Thu, 15 Sep 2022 00:00:00 GMT

The next major release of JupyterLab will be significantly faster than previous versions. This was achieved both through systematic tracking of performance bugs and through significant upgrades to the Jupyter communication protocol and rendering mechanism for documents.

Upgrading nbgrader

Nicolas Brichet — Thu, 15 Sep 2022 00:00:00 GMT

Project Jupyter provides a broad collection of open-source tools for interactive computing that has become ubiquitous in data science and scientific computing, and is very popular in educational…

Visual programming in JupyterLab with Blockly

Denisa Checiu, Carlos Herrero — Fri, 29 Jul 2022 00:00:00 GMT

When moving from block-based programming to a more classical language like Python, students often have to switch to a completely new environment. In order to provide a smooth ramp of complexity for learners, we designed a JupyterLab extension for Blockly so that Jupyter can be used from the very first steps of their learning journey.

Mamba meets JupyterLite

Thorsten Beier, Martin Renou — Thu, 14 Jul 2022 00:00:00 GMT

JupyterLite is a Jupyter distribution that runs entirely in the web browser without any server components. To achieve this, all language kernels must also run in the browser. A significant benefit of…

Inspector JupyterLab

Martin Renou — Mon, 11 Apr 2022 00:00:00 GMT

JupyterLab provides multiple ways to improve your coding workflow: code highlighting, code completion, theming, debugger with rich variable rendering and more.

HTML5

Madhur Tandon — Fri, 01 Apr 2022 00:00:00 GMT

In this post, we present a new backend for Matplotlib enabling the rendering of figures in the browser by leveraging the

The future of mamba

Wolf Vollprecht — Tue, 01 Mar 2022 00:00:00 GMT

The recent adoption of libmamba by the conda project was a great validation of our work. Several other game-changing innovations are in the works by the mamba team. Stay tuned!

Congratulations, Distinguished Contributors!

Johan Mabille — Wed, 16 Mar 2022 00:00:00 GMT

We are proud to announce the recipients of the Jupyter Distinguished Contributor (JDC) award for the 2021 cohort of contributors.

Jupyter Everywhere

Martin Renou, Jeremy Tuloup — Tue, 15 Mar 2022 00:00:00 GMT

Easily embed a console, a notebook, or a fully-fledged IDE on any web page.

ROS2 support for Zethus

Kedus Mathewos — Thu, 17 Feb 2022 00:00:00 GMT

Zethus is an Open Source library for Robot visualization in the browser. Initially developed by Rapyuta Robotics, it provides a web-based…

QuantStack: 2021 in review

Sylvain Corlay — Sat, 18 Dec 2021 00:00:00 GMT

This was a crazy year of innovation for the open-source team at QuantStack. From JupyterLab to the packaging ecosystem and high-performance computing, we made some major strides in all areas, while almost doubling the size of the team.

Jupyter Games

Thorsten Beier — Tue, 14 Dec 2021 00:00:00 GMT

Making their own tiny video games can be a great way for kids to learn programming in a playful matter. While Jupyter is widely used as a scientific and educational tool, Jupyter is seldom used as a…

Need for speed: Voilà edition

Duc Trung Le — Fri, 10 Dec 2021 00:00:00 GMT

Voilà turns Jupyter notebooks into standalone applications without requiring any modification to the content. You want to share your content with non-technical readers? Just call Voilà with the…

Towards a more secure conda ecosystem

Adrien Delsalle — Tue, 16 Nov 2021 00:00:00 GMT

Supply chain security is crucial to the overall security of package managers, which are a major attack vector of information systems. Today, we are pleased to announce that mamba has gained the…

Toward a faster and thinner xsimd

Serge Guelton, Johan Mabille — Fri, 29 Oct 2021 00:00:00 GMT

xsimd, the SIMD library by QuantStack, got more and more adoption in recent years. While it helped improve the library, adoption also brought new requirements. Among them was the abitility to...

Xeus-Lite

Thorsten Beier — Mon, 25 Oct 2021 00:00:00 GMT

JupyterLite is a JupyterLab distribution that runs entirely in the web browser, backed by in-browser language kernels. Xeus is C++ library for writing Jupyter kernels. In this blogpost we show how…

The mamba project and the CZI grant

Wolf Vollprecht — Tue, 19 Oct 2021 00:00:00 GMT

For those who don't know yet: mamba is a fast, cross-platform & non-language-specific package manager widely used in the scientific space. Mamba works with conda -packages and works great in tandem…

Looking at notebooks from a new perspective

Mariana Meireles — Tue, 05 Oct 2021 00:00:00 GMT

Jupyter notebooks are a great tool for practitioners of scientific computing from the research phase of their work to the communication of their results. The interleaving of code and rich text makes…

Xeus 2.0

Johan Mabille, Sylvain Corlay — Tue, 28 Sep 2021 00:00:00 GMT

We have just released Xeus 2.0. This is a major release of the library. While it includes backward-incompatible changes, they are very limited and upgrading your kernels should be relatively easy…

From Jupyter to the Moon

Thorsten Beier — Fri, 24 Sep 2021 00:00:00 GMT

A key principle in Jupyter’s design is language agnosticism, and one of the main extension points of the Jupyter ecosystem is the kernel, the part of the architecture responsible for executing the…

Jupyter ❤️ WebAssembly ❤️ Python

Jeremy Tuloup — Tue, 13 Jul 2021 00:00:00 GMT

JupyterLite is a JupyterLab distribution that runs entirely in the web browser, backed by in-browser language kernels. JupyterLite is a reboot of several attempts at making a full static Jupyter…

Mamba 0.15.0

Wolf Vollprecht, Adrien Delsalle — Fri, 09 Jul 2021 00:00:00 GMT

We’ve just dropped one of the biggest releases of mamba (the fast conda package manager)— along with some nice improvements in libsolv! This is a quick update on some new and improved features in…

Le calcul haute performance au service de l'innovation (in French)

Fondation École Polytechnique — Fri, 18 Jun 2021 00:00:00 GMT

Led by Professor Marc Massot (Center for Applied Mathematics), the HPC@Maths initiative aims at developing a strong expertise in high-performance computing at École Polytechnique. This project is supported by the X Foundation, and by QuantStack.

How we made Jupyter notebooks collaborative with Yjs

Kevin Jahns — Sat, 12 Jun 2021 00:00:00 GMT

Collaborative editing — à la Google Docs — is a feature that you still rarely find in applications. One of the few good things that came out of this pandemic is that more people seem to care about…

RetroLab - A JupyterLab distribution with a retro look and feel

Jeremy Tuloup — Sun, 27 Jun 2021 00:00:00 GMT

RetroLab is an alternative JupyterLab distribution, built from the ground-up, providing a notebook interface with a retro look and feel. Currently at version 3.0, JupyterLab provides an advanced…

Rhumba, the fast R distribution is available on Windows

Adrien Delsalle — Tue, 18 May 2021 00:00:00 GMT

A few months ago, Mariana Meireles created Rhumba, a fast R package manager and distribution leveraging the conda-forge initiative and the mamba library. Today, we’re happy to announce a new major…

Enabling the JupyterLab Debugger with ipykernel

Sylvain Corlay, Johan Mabille — Thu, 13 May 2021 00:00:00 GMT

JupyterLab 3.0 includes a visual debugger that allows to interactively set breakpoints, step into functions, and inspect variables with any Jupyter kernel that implements the Jupyter debugger…

Jupyter ❤️ Cytoscape

Mariana Meireles — Tue, 11 May 2021 00:00:00 GMT

Cytoscape is an open source software platform for visualizing complex networks and integrating these with any type of attribute data. While the project was started in the life sciences community, it…

zarray: a dynamic expression system based on xtensor

Johan Mabille — Thu, 29 Apr 2021 00:00:00 GMT

In this article we demonstrate how we pushed xtensor one step further, implementing a dynamic expression system on top of it. xtensor is a comprehensive C++framework for multi-dimensional array…

nbterm: Jupyter Notebooks in the terminal

David Brochart — Mon, 26 Apr 2021 00:00:00 GMT

Jupyter notebooks are mostly known for their web-based user interface, such as JupyterLab or the Classic Notebook. They offer a great user experience, allow for rich output rendering, provide…

Abracadabra! Bringing the Magics to Xeus-Python

Martin Renou — Thu, 18 Feb 2021 00:00:00 GMT

Last year, we set ourselves to implement a visual debugger for JupyterLab. This endeavor required major developments in the JupyterLab…

Cross-platform Conda Packages for ROS

Wolf Vollprecht, Tobias Fischer — Tue, 16 Feb 2021 00:00:00 GMT

2020 has been a busy year for the RoboStack project. We collaboratively published ros-noetic on four platforms (Windows, macOS, Linux x64 and ARM64) and revamped how ROS packages can be released on…

Genomic Data representation in Jupyter

Jean-David Harrouet — Mon, 08 Feb 2021 00:00:00 GMT

If there is one thing that recent events tell us, it is that genomics is a large source of data, and that its manipulation and understanding allow for the quick development of new drugs and…

An SQL Solution for Jupyter

Mariana Meireles — Wed, 03 Feb 2021 00:00:00 GMT

A few months ago we released xeus-sqlite, a Jupyter kernel that allows users to make SQLite queries directly from the notebook. With the needs of the Jupyter data science community in mind we decided…

A Curiously Recurring Widget Library

Sylvain Corlay — Wed, 27 Jan 2021 00:00:00 GMT

Diving into the implementation of xwidgets…

Robotic Process Automation with JupyterLab

Martin Renou, Johan Mabille — Mon, 18 Jan 2021 00:00:00 GMT

Robotic Process Automation (RPA) differs from classical automation tools in that the actions to automate can be developed by observing a user perform a task in a graphical user interface, across…

Dashboarding with JupyterLab 3.0

Carlos Herrero, Jeremy Tuloup — Fri, 08 Jan 2021 00:00:00 GMT

Project Jupyter offers a complete suite of open-source tools for the scientific computing community, reaching from the exploratory phase of a project to the presentation of the results. In this last…

JupyterLab 3.0 is Released!

Jeremy Tuloup — Tue, 05 Jan 2021 00:00:00 GMT

The 3.0 release of JupyterLab brings many new features to users and substantial improvements to the extension distribution system.

Interactive C++ for Data Science

Vassil Vassilev, David Lange, Simeon Ehrig, Sylvain Corlay — Wed, 23 Dec 2020 00:00:00 GMT

This post will discuss some applications of Cling developed to support data science researchers. In particular, interactively probing data and interfaces makes complex libraries and complex data…

Xtensor ❤️ Zarr

David Brochart — Tue, 15 Dec 2020 00:00:00 GMT

A C++ implementation of the Zarr specification…

A C++ API for Vega-Lite

Madhur Tandon — Wed, 02 Dec 2020 00:00:00 GMT

In this post, we present the first public release of XVega, a C++ library for producing Vega-Lite charts. Data science workflows differ from traditional software development in that engineers make…

Ipygany, Jupyter into the Third Dimension

Martin Renou — Wed, 14 Oct 2020 00:00:00 GMT

From Paraview to Mayavi, there are multiple solutions for data analysis on 3D meshes on the desktop. Most of these tools provide high-level APIs that can be driven with a scripting language like…

Rhumba, a Faster R Distribution

Mariana Meireles — Tue, 13 Oct 2020 00:00:00 GMT

CRAN is the official package manager for the R ecosystem. Unfortunately, simple operations such as creating new environments or installing packages with it can be very time-consuming due to the fact…

The Templating System of Nbconvert 6

Sylvain Corlay — Sat, 26 Sep 2020 00:00:00 GMT

One of the main changes in nbconvert 6 is the refactor of the template system, which should be easier to extend and build upon. In this article, we dive into the template system, and provide a…

Memestra!

Mariana Meireles — Mon, 21 Sep 2020 00:00:00 GMT

Modern IDE features such as interactive debugging, linting, code formatting, and refactoring tools are now available in JupyterLab, thanks to the JupyterLab-LSP extension and the recent release of…

Real-time Rendering of Water Caustics

Martin Renou — Thu, 27 Aug 2020 00:00:00 GMT

In this article, I present an attempt for generalizing caustics computation in real-time using WebGL and ThreeJS. The fact that it is an attempt is important, finding a solution that works well in…

JupyterLab, the Cloud Robotics Command Station

Carlos Herrero, Wolf Vollprecht — Tue, 11 Aug 2020 00:00:00 GMT

Building the next generation of robotics cloud computing using ROS and JupyterLab

SlicerJupyter, a 3-D Slicer Kernel for Interactive Publications

Wed, 08 Jul 2020 00:00:00 GMT

Use Jupyter and 3D Slicer kernel to implement biomedical data processing workflows in a notebook.

Open Software Packaging for Science

Sun, 19 Jul 2020 00:00:00 GMT

Modern scientific applications typically depend on a very large number of libraries written in various programming languages, ranging from Fortran to TypeScript, C, C++, Python, etc. So, we need to…

A Jupyter Kernel for SQLite

Mariana Meireles — Thu, 11 Jun 2020 00:00:00 GMT

While it is well known in the Python scientific computing community, Jupyter is in fact a language-agnostic development environment. High-quality language kernels exist for the main languages of data…

PLASMA, a Learning Platform Powered by Jupyter

Jeremy Tuloup — Mon, 11 May 2020 00:00:00 GMT

Jupyter has been a great choice for education for many years. The Jupyter Notebook has become one of the most popular tools to conduct workshops, tutorials, and teach online classes. Recently we have…

Interactive Graph Visualization in Jupyter with IPycytoscape

Mariana Meireles — Thu, 30 Apr 2020 00:00:00 GMT

The Jupyter widgets ecosystem offers a broad variety of data visualization tools for exploratory analysis in the notebook. However, we…

A Visual Debugger for Jupyter

Wed, 25 Mar 2020 00:00:00 GMT

Most of the progress made in software projects comes from incrementalism. The ability to quickly see the outcome of an execution and iterate has been one of the main reasons for the success of…

Field Report on the Jupyter Community Workshop on Dashboarding

Sylvain Corlay — Fri, 14 Feb 2020 00:00:00 GMT

From June 3rd to June 6th 2019, thirty-five developers from the Jupyter community met in Paris for a four-day workshop on dashboarding with Project Jupyter. For four days, attendees worked full time…

Introducing Scikit-Geometry

Wolf Vollprecht — Fri, 24 Jan 2020 00:00:00 GMT

As a robotics researcher (but also in many other fields) computations on geometric primitives are used very frequently— but it’s harder than anticipated to find the right abstractions in a nice…

How we Wrote Xtensor (Episode 8) - Iterators

Johan Mabille — Tue, 07 Jan 2020 00:00:00 GMT

In the previous article, we implemented the broadcasting rules so that we can compute the shape of arbitrary complex trees that involve arrays with different but compatible shapes. This is the first…

2019 in Review

Wolf Vollprecht — Thu, 02 Jan 2020 00:00:00 GMT

This year has seen major changes in xeus and xeus-python, driven by the requirements for developing a visual debugger. We have implemented a prototype that supports the Debug Adapter Protocol from…

Robot Development with Jupyter

Wolf Vollprecht — Tue, 31 Dec 2019 00:00:00 GMT

Jupyter and Voilà are two popular packages in the data science ecosystem. But the Jupyter plugins jupyter-ros and jupyter-amphion make them more interesting than ever for robotics applications. This…

How we Wrote Xtensor (Episode 7) - Broadcasting

Johan Mabille — Sun, 24 Nov 2019 00:00:00 GMT

In the previous article, we implemented operator and mathematical function overloads so that we can build arbitrary complex expression trees and access their elements. Before we can assign an…

Configure your Dashboards with the Voilà Gridstack Template

Bartosz Telenczuk — Mon, 11 Nov 2019 00:00:00 GMT

Voilà is a new dashboarding solution from Jupyter ecosystem. It provides an easy-to-use tool to convert your Jupyter notebooks into standalone web applications. If you have not used it before, you…

A Slideshow template for Voilà

Marianne Corvellec — Tue, 29 Oct 2019 00:00:00 GMT

Last June, QuantStack announced the first release of Voilà, a solution to turn Jupyter notebooks into standalone web applications. Voilà enforces security (preventing arbitrary code execution) while…

ROS on Conda-forge

Wolf Vollprecht — Mon, 28 Oct 2019 00:00:00 GMT

ROS is a fantastic and very large suite of software tools for Robotics. It’s used in many applications and with great success, ranging from the hobbyist market to industrial use cases. Most people…

IPycanvas, a Python Canvas for Jupyter

Martin Renou — Fri, 25 Oct 2019 00:00:00 GMT

As you may already know, the Jupyter Notebook and JupyterLab are Browser-based applications. Browsers are incredibly powerful, they allow you to swap rich and interactive graphical interfaces…

Field Report on the Kernel Community Workshop

Sylvain Corlay — Mon, 07 Oct 2019 00:00:00 GMT

From May 27th to May 29, thirty developers from the Jupyter community met in Paris for a three-days workshop on the Jupyter kernel…

How we Wrote Xtensor (Episode 6) - Operator Overloading

Johan Mabille — Wed, 25 Sep 2019 00:00:00 GMT

In the previous article, we introduced expression templates and developed the skeleton of the xfunction class, meant to represent a node of the abstract syntax tree of a tensor expression. We left…

Interactive GIS in Jupyter with IPyleaflet

Sylvain Corlay, Martin Renou — Wed, 25 Sep 2019 00:00:00 GMT

As Jupyter grew in popularity, a broad ecosystem of visualization packages based on Jupyter widgets has been developed, bringing even more interactivity to the Jupyter world. In this article, we dive…

How we Wrote Xtensor (Episode 5) - Expression Templates

Johan Mabille — Thu, 05 Sep 2019 00:00:00 GMT

In the previous articles, we started to implement an N-D container, xarray, which has value semantics and provides all the methods required to access its data. The next step is to give it computation…

Building a Calculator Jupyter Kernel

Vasavan Thiru, Thibault Lacharme — Tue, 16 Jul 2019 00:00:00 GMT

In order to provide a language-agnostic scientific development environment, the Jupyter project is built upon a well-specified protocol to communicate with the Kernel, the part of the infrastructure…

How we Wrote Xtensor (Episode 4) - Value Semantics

Johan Mabille — Tue, 16 Jul 2019 00:00:00 GMT

xtensor is a comprehensive framework for N-D arrays processing, including an extensible expression system, lazy evaluation, and many other…

Introducing Templates for Jupyter Widget Layouts

Bartosz Telenczuk — Thu, 04 Jul 2019 00:00:00 GMT

Notebooks come alive with Jupyter widgets, which allow users to produce interactive GUIs inline in the Jupyter notebook or JupyterLab. You can either use them to add a few interactive controls and…

How we Wrote Xtensor (Episode 3) - The Constructors

Johan Mabille — Mon, 24 Jun 2019 00:00:00 GMT

In the previous article, we detailed the implementation of a generic access operator for our N-D container. Two more things to implement before the xarray class can be used in practice are…

How we Wrote Xtensor (Episode 2) - Access Operators

Johan Mabille — Thu, 20 Jun 2019 00:00:00 GMT

In the previous article, we started to design an N-dimensional container. We detailed the implementation of methods related to shape, strides, and memory layout. Let us now get to the access…

How we Wrote Xtensor (Episode 1) - N-Dimensional Containers

Johan Mabille — Mon, 17 Jun 2019 00:00:00 GMT

xtensor is a C++ library meant for numerical analysis with multi-dimensional array expressions. It exposes an API similar to that of NumPy…

And Voilà!

Sylvain Corlay, Maarten Breddels — Tue, 11 Jun 2019 00:00:00 GMT

The goal of Project Jupyter is to improve the workflows of researchers, educators, scientists, and other practitioners of scientific computing, from the exploratory phase of their work to the…

Mamba Development News

Wolf Vollprecht — Mon, 10 Jun 2019 00:00:00 GMT

Mamba is a drop-in replacement for conda, the awesome cross-platform package manager. In our opinion, conda has one tiny problem: it’s too slow when many packages are installed, or when installing…

Building an Open-Source Continuous Benchmark System

Wolf Vollprecht — Wed, 29 May 2019 00:00:00 GMT

Concourse is a continuous integration software, and we use it for two purposes: multi-project continuous integration, and continuous benchmarking. It’s easy to setup on a low cost server, using…

ROS @ Jupyter

Wolf Vollprecht — Sun, 07 Apr 2019 00:00:00 GMT

Historically, the ROS (Robot Operating System) community has relied on Qt for building complex user interfaces. Nowadays, the Jupyter notebook and the ipywidgets framework offer a compelling…

Making Conda Fast Again

Wolf Vollprecht — Thu, 28 Mar 2019 00:00:00 GMT

You might have seen the announcement on Twitter: at QuantStack we’ve been working on making a prototype of a conda-compatible package manager called mamba. Conda is a great tool to distribute data…

Interactive spreadsheets in Jupyter

Martin Renou — Fri, 08 Mar 2019 00:00:00 GMT

ipysheet is a new interactive widgets library that aims at implementing the core features of a good spreadsheet application and more…

A New Python Kernel for Jupyter

Martin Renou — Wed, 09 Jan 2019 00:00:00 GMT

Project Jupyter aims at providing a consistent set of tools for interactive computing workflows across multiple programming languages. Jupyter projects are popular at all stages of a research project…

Xframe: Towards a C++ Dataframe

Johan Mabille — Fri, 04 Jan 2019 00:00:00 GMT

For a very long time, the C++ programming language lacked a high-level toolset for scientific computing. Data structures such as N-dimensional arrays, data frames, are the bread and butter of the R…

Designing Language Bindings with Xtensor

Johan Mabille — Fri, 30 Nov 2018 00:00:00 GMT

xtensor and its satellite projects make it easy to implement a feature once in C++ and expose it to the main languages of data science, such as Python, Julia and R with little extra work. Although…

Video Streaming in the Jupyter Notebook

Martin Renou — Mon, 19 Nov 2018 00:00:00 GMT

ipywidgets plays an essential part in the Jupyter ecosystem; it brings interactivity between user and data. Widgets are eventful Python objects that often have a visual representation in the Jupyter…

The Xtensor Vision

Wolf Vollprecht — Sat, 10 Nov 2018 00:00:00 GMT

Here we’re laying out a vision for the xtensor project, the n-dimensional array in the C++ language — that makes it easy to write high-performance code and bind it to the languages of data science…

Bye bye Boost.SIMD, Welcome XSimd

Serge Guelton — Thu, 31 Oct 2019 00:00:00 GMT

Boost.simd provides a C++ abstraction of vector type, allowing for efficient vectorization of array computations. It has been (optionally) used as part of the expression template engine of Pythran for a long time, a great collaboration that led to several patches in boost.simd, and great performance for Pythran.

Xtensor, C++, and the Julia Challenge

Sylvain Corlay, Johan Mabille, Wolf Vollprecht — Wed, 24 Oct 2018 00:00:00 GMT

Last mon, Simon Danisch launched the Julia Language Challenge, a programming challenge from a member of the Julia community to other programming languages. with high performances. This can be…

The Julia Challenge in C++

Wolf Vollprecht — Fri, 12 Oct 2018 00:00:00 GMT

Recently, some folks of the Julia community were boasting about the expressiveness of the Julia programming language, compared to older languages. That’s how they started the Julia Challenge. The…

Interpreter C++ for GIS with Jupyter

Martin Renou — Tue, 24 Apr 2018 00:00:00 GMT

The recent release of the Jupyter kernel for C++, based on the Cling interpreter enabled a number of new workflows for the users of the C++ programming language. More than a limited set of base…

Authoring Custom Jupyter Widgets

Olivier Borderies, Olivier Coudray, Pierre Marion — Mon, 05 Mar 2018 00:00:00 GMT

Jupyter interactive widgets enhance the notebook experience by allowing users to create graphical user interfaces. They enable richer interaction with the data and computing resources. While the base…

Jupyter Receives the ACM Software System Award

Project Jupyter — Fri, 02 Mar 2018 00:00:00 GMT

It is our pleasure to announce that Project Jupyter has been awarded the 2017 ACM Software System Awa, a significant honor for the project. We are humbled to join an illustrious list of projects…

A Diagram Editor for JupyterLab

Wolf Vollprecht — Mon, 26 Feb 2018 00:00:00 GMT

The new JupyterLab interface is much more than a replacement for the classic notebook. It aims to bring together all the pieces required for a complete scientific workflow. The extension-based…

Fast Reductions in Xtensor with Xsimd

Wolf Vollprecht — Tue, 20 Feb 2018 00:00:00 GMT

xtensor has a wealth of mathematical functions available already: we support a lot of the NumPy API right there in C++. One of the areas where we were a bit slower than NumPy in the past were…

Faster Xtensor

Wolf Vollprecht — Sun, 18 Feb 2018 00:00:00 GMT

Knowing the size of the memory that is to be allocated at compile time can improve the runtime performance a lot — the compiler can already reserve the required space on the stack (instead of having…

Interactive Workflows for C++ with Jupyter

Sylvain Corlay, Loic Gouarin, Johan Mabille, Wolf Vollprecht — Wed, 29 Nov 2017 00:00:00 GMT

Scientists, educators and engineers not only use programming languages to build software systems, but also in interactive workflows, using the tools available to explore a problem and reason about…

Scientific Computing in a Polyglot World with Xtensor

Sylvain Corlay — Fri, 05 May 2017 00:00:00 GMT

The One Language to Rule Them All probably does not exist yet. In the world of interactive scientific computing, countless articles and blog posts argue on the merits of R, Python, Julia and other…

All blog posts featured by QuantStack team

JupyterLite 0.8 is released! 🎉

Congratulations, Distinguished Contributors!

Improving SIMD in Apache Arrow: 80% faster Parquet column reads on ARM

Async Xeus Python

Sharded Repodata Support in Mamba

Introducing Sparrow-IPC: A modern C++ implementation of Arrow IPC

How notebook.link Scales Without Backends

Faster Reads for Apache Parquet: Improving Integer Unpacking

Expanding Geospatial Workflows in JupyterGIS: STAC Browsing and Story Maps

JupyterLite Officially Joins Project Jupyter

Instantly view Parquet files in JupyterLab with Arbalister

Introducing notebook.link: The Future of Notebook Sharing

JupyterLite 0.7 is released! 🎉

Teaching a Billion People to Code: How JupyterLite Is Scaling the Impossible

JupyterLab 4.5 and Notebook 7.5 are available!

GNU Octave Meets JupyterLite: Compute Anywhere, Anytime!

JupyterGIS breaks through to the next level

Sovereign Tech Agency Invests in Apache Arrow’s Future with QuantStack

From Linux Parties to Global Impact: An Interview with Sylvain Corlay, Founder of QuantStack

A Year in Review: QuantStack’s Contributions to Apache Arrow

Create your own layers in JupyterGIS

C++ in Jupyter — Interpreting C++ in the Web

JupyterLite 0.6.0 is released! 🎉

JupyterLab 4.4 and Notebook 7.4 are available!

Congratulations, Distinguished Contributors!

Making Qt collaborative using CRDTs

R in the Browser: Announcing Our WebAssembly Distribution

Real-time collaboration and collaborative editing for GIS workflows with Jupyter and QGIS

PyData Paris 2025 Keynotes

Announcing JupyterCAD 3.0

Sparrow

JupyterLite Terminal

Automate your releases with the Jupyter Releaser 🚀

QuantStack Steps Up to Support Apache Arrow with New Dedicated Team

Interactive Mapping with ipyopenlayers

Announcing the 2023 cohort of Jupyter distinguished contributors

Ipydatagrid is now part of Project Jupyter

Introducing Mamba 2.0

QuantStack open-source internship program

JupyterCAD 2.0

JupyterGIS

Commit!

In memoriam: Fanny Loustau Chartez

Announcing PyData Paris 2024

Meet Xeus-R: a future-proof Jupyter kernel for R

QuantStack: 2023 in review

Recent keyboard navigation improvements in Jupyter

And Voici!

Plug your application into the Jupyter world

Voilà 0.5 - Homecoming

Announcing Jupyter Notebook 7

🎉 JupyterCon 2023 recordings now live on YouTube! 🎉

A theme editor for JupyterLab

Collaborative CAD in JupyterLab

Congratulations, Distinguished Contributors!

Embed interactive itkwidgets 3D renderings into JupyterLite deployments

Improving the accessibility of Jupyter

A Jupyter kernel for GNU Octave

QuantStack: 2022 in review

Managing conflicts with Mamba

JupyterCon is back in 2023

Accelerating JupyterLab

Upgrading nbgrader

Visual programming in JupyterLab with Blockly

Mamba meets JupyterLite

Inspector JupyterLab

HTML5 based renderer for Matplotlib in Pyodide

The future of mamba

Congratulations, Distinguished Contributors!

Jupyter Everywhere

ROS2 support for Zethus

QuantStack: 2021 in review

Jupyter Games

Need for speed: Voilà edition

Towards a more secure conda ecosystem

Toward a faster and thinner xsimd

Xeus-Lite

The mamba project and the CZI grant

Looking at notebooks from a new perspective

HTML5