{"id":2554,"library":"jupytext","title":"Jupytext","description":"Jupytext is a Jupyter plugin that allows users to save Jupyter notebooks as various plain text formats, including Markdown documents, Julia, Python, or R scripts. This enables easier version control with tools like Git and allows editing notebooks in standard IDEs. It supports two-way synchronization between the `.ipynb` file and its paired text representation. The current version is 1.19.1, and the library maintains an active release cadence.","status":"active","version":"1.19.1","language":"en","source_language":"en","source_url":"https://github.com/mwouts/jupytext","tags":["jupyter","notebook","version-control","markdown","python","scripts","ide"],"install":[{"cmd":"pip install jupytext","lang":"bash","label":"Install Jupytext"}],"dependencies":[],"imports":[{"note":"Used to read a notebook from a text file or .ipynb.","symbol":"read","correct":"from jupytext import read"},{"note":"Used to write a notebook to a text file or .ipynb.","symbol":"write","correct":"from jupytext import write"}],"quickstart":{"code":"# Create a sample Jupyter notebook file\nwith open('my_notebook.ipynb', 'w') as f:\n    f.write('{\\\"cells\\\": [{\\\"cell_type\\\": \\\"code\\\", \\\"execution_count\\\": null, \\\"metadata\\\": {}, \\\"outputs\\\": [], \\\"source\\\": [\\\"print(\\\\\\\"Hello from Jupytext!\\\\\\\")\\\"]}, {\\\"cell_type\\\": \\\"markdown\\\", \\\"metadata\\\": {}, \\\"source\\\": [\\\"# A Markdown Cell\\\"]}], \\\"metadata\\\": {\\\"kernelspec\\\": {\\\"display_name\\\": \\\"Python 3\\\", \\\"language\\\": \\\"python\\\", \\\"name\\\": \\\"python3\\\"}}, \\\"nbformat\\\": 4, \\\"nbformat_minor\\\": 4}')\n\n# Pair the .ipynb notebook with a Python script in percent format\n# and then synchronize them\nimport subprocess\n\nprint(\"Pairing notebook.ipynb with notebook.py:percent...\")\nsubprocess.run(['jupytext', '--set-formats', 'ipynb,py:percent', 'my_notebook.ipynb'], check=True)\n\nprint(\"Synchronizing files...\")\nsubprocess.run(['jupytext', '--sync', 'my_notebook.ipynb'], check=True)\n\nprint(\"Generated files:\")\nsubprocess.run(['ls', 'my_notebook.*'])\n\n# Optionally, read the created .py file content\nwith open('my_notebook.py', 'r') as f:\n    print('\\n--- my_notebook.py content ---')\n    print(f.read())\n\n# Clean up (optional)\n# import os\n# os.remove('my_notebook.ipynb')\n# os.remove('my_notebook.py')","lang":"python","description":"This quickstart demonstrates how to create a basic `.ipynb` file, then use the `jupytext` command-line interface to pair it with a Python script (`.py:percent` format) and synchronize the two. The pairing and synchronization ensure that changes in one file are reflected in the other."},"warnings":[{"fix":"Upgrade your Python environment to 3.9 or higher.","message":"Jupytext dropped support for Python 3.8 starting with version 1.17.2, as Python 3.8 reached its End-of-Life. Users on older Python versions must upgrade to at least Python 3.9 or use an older Jupytext version.","severity":"breaking","affected_versions":">=1.17.2"},{"fix":"Always use `jupytext --pre-commit-mode` in pre-commit hooks. Ensure that `types_or: [jupyter, python]` and `require_serial: true` are set in your `.pre-commit-config.yaml` for Jupytext hooks.","message":"When using `jupytext --sync` as a `pre-commit` hook, it can sometimes introduce unstaged changes or lead to an infinite loop if not configured correctly. The `--pre-commit-mode` flag is crucial to prevent this behavior.","severity":"gotcha","affected_versions":"<=1.19.1"},{"fix":"Upgrade to Jupytext 1.19.0 or later to resolve these cell ID warnings.","message":"Older versions of Jupytext (pre-1.19.0) could produce warnings about missing or unexpected 'id' fields in cells when converting to certain formats like Pandoc. This was a common validation warning.","severity":"gotcha","affected_versions":"<1.19.0"},{"fix":"Review scripts using `--set-formats`. If overriding existing files is still desired, ensure no conflicting pairing metadata exists or consider a `jupytext --to` command.","message":"The behavior of `jupytext --set-formats` changed in version 1.17.2. It no longer overrides existing paired files by default, instead respecting existing pairings. Workflows that relied on `--set-formats` to forcibly overwrite paired files may need adjustment.","severity":"breaking","affected_versions":">=1.17.2"},{"fix":"Restart your JupyterLab or Jupyter Notebook server after installation (`jupyter lab stop` then `jupyter lab`). If the server extension message `[Jupytext Server Extension] Changing NotebookApp.contents_manager_class` is not seen, enable it explicitly with `jupyter serverextension enable jupytext`.","message":"After installing Jupytext, especially the JupyterLab extension, a full restart/reload of the Jupyter server and/or JupyterLab interface is often required for the extension to be recognized and activated correctly.","severity":"gotcha","affected_versions":"All"},{"fix":"Use the `py:percent` format to preserve magics or set the `comment_magics` option in notebook metadata or Jupyter configuration (`c.ContentsManager.comment_magics = False`).","message":"When exporting notebooks to Python scripts (in formats other than `py:percent`) or R Markdown, Jupyter magic commands (`%matplotlib inline`, `%%timeit`) are commented out by default. This is because IDEs do not understand these magics. This behavior can be controlled.","severity":"gotcha","affected_versions":"All"}],"env_vars":null,"last_verified":"2026-04-10T00:00:00.000Z","next_check":"2026-07-09T00:00:00.000Z"}