Marimo

Marimo is the next-generation, open-source reactive Python notebook: It guarantees reproducible execution, stores notebooks as pure `.py` scripts for Git-friendliness, and deploys directly as an interactive web application.

Marimo is the open-source, reactive Python notebook framework: It fundamentally redesigns the computational notebook experience, replacing the imperative model with a deterministic, reactive execution engine that eliminates hidden state. Notebooks are stored as pure `.py` scripts, ensuring Git-friendly version control and seamless integration into standard software engineering workflows. The platform provides first-class UI primitives, like sliders and dropdowns, for building interactive data applications entirely in Python (via `mo.ui.*`), and its static analysis guarantees consistent code, outputs, and program state for reliably reproducible experiments and deployable web apps.

https://marimo.io