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Marimo: Revolutionizing Python Notebooks with Dataflow Graphs

2025-08-09

Marimo is an open-source Python notebook that represents notebooks as dataflow graphs, unlike traditional REPLs. This representation blends the best of interactive computing with the reproducibility and reusability of Python software. Marimo notebooks function as reactive notebooks, executable scripts, Python modules, and interactive web apps. It addresses shortcomings of traditional notebooks in reproducibility, interactivity, maintainability, and reusability, ensuring code and output synchronization through static analysis, and supporting features like SQL embedding and module hot-reloading. Marimo is used by companies like Cloudflare, Shopify, and BlackRock.

Marimo: Reimagining Jupyter Notebooks as Versionable Pure Python

2025-03-19

Marimo is an open-source project that reimagines Jupyter Notebooks as pure plaintext Python files, usable as regular Python programs. Traditional Jupyter Notebooks' JSON-based .ipynb format leads to version control headaches, poor code reusability, and other issues. Marimo solves these by representing notebooks as dataflow graphs, making them easily versionable (with Git), importable as modules, testable with pytest, and executable as scripts. It also supports embedding SQL and Markdown and offers caching for efficiency. Marimo has seen wide adoption, used by companies like OpenAI and BlackRock, and numerous research institutions, quickly establishing itself as a new standard for interactive computing.

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