Reactive Jupyter- reactive execution of Python in VSCode
Hi HN I’ve developed an experimental VSCode extension to keep a Python Kernel in sync with a Python file. (Reactive execution) The extension uses Static Code Analysis to infer dependencies between lines of code. When you modify a line in a file, it will be marked as Stale together with all the lines that depend on it. You can Sync the state with Ctrl+Shift+Enter. In this way, you are always in control. See the Readme for a detailed demo. —------------- The primary limitation of this extension is that it currently relies on Static Code Analysis, which can only do so much. Again, see the…
Reactive Jupyter- reactive execution of Python in VSCode launched on March 20, 2024 with 8 votes, #1,754 of 4,270 launches that month and more than 75% of that year's launches. The site was still online in September 2026, 2 years on.
What it does
Extension for Visual Studio Code - Reactive execution of a Python script. Keep your Jupyter kernel in sync with your code.
An experimental Visual Studio Code extension to add support for Reactive Execution of a Python script. This extension performs simple Static Code Analysis to find dependencies between the various statements in a Python script. When you modify a line, it will be marked as Stale together with all the lines that depend on it. This extension is in PREVIEW . Please don't expect it to run flawlessly. Also, read about the limitations below. Install the extension. The Jupyter extension should be installed as well. Add these settings for the Jupyter extension in your settings.json file: these are required to work with Reactive Jupyter. If they are set differently, you will be prompted to change…from marketplace.visualstudio.com
In the maker’s words, at launch
Hi HN I’ve developed an experimental VSCode extension to keep a Python Kernel in sync with a Python file. (Reactive execution) The extension uses Static Code Analysis to infer dependencies between lines of code. When you modify a line in a file, it will be marked as Stale together with all the lines that depend on…
Does a similar job
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Marimo VS Code extension – Python notebooks built on LSP and uvNov 2025 · github.com · ▲65Hi HN! We're excited to release our VS Code/Cursor extension for marimo [1], an open-source, reactive Python notebook. This extension provides a native experience for working with marimo notebooks, a long-requested feature that we’ve worked hard to get right. An LSP-first architecture The core of our extension is a marimo notebook language server (marimo-lsp [2]). As far as we know, it’s the first notebook runtime to take this approach. The Language Server Protocol (LSP) [3] offers a small but important set of notebook-related capabilities that we use for document and kernel syncing;…
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