Mosaic Widget

A Jupyter widget for Mosaic. Given a declarative specification, will generate web-based visualizations while leveraging DuckDB in the Jupyter kernel. Create interactive Mosaic plots over Pandas and Polars data frames or DuckDB connections.

Learn how to install and use the widget in the Mosaic documentation.

Developer Setup

We use hatch to manage our development setup.

To activate the environment, run hatch shell.

This should install the widget in development mode so you can start Jupyter.

You can start Jupyter with jupyter lab --notebook-dir=../../dev/notebooks. If you cannot import the widget module, make sure that your Jupyter uses the right environment. You can add your environment to Jupyter by running python -m ipykernel install --user --name=mosaic and then select mosaic in the Jupyter environment dropdown.

Run npm run build to build the widget JavaScript code. If you want to live edit the widget code, run npm run dev in a separate terminal and change _DEV = False to _DEV = True inside mosaic_widget/__init__.py.

Publishing

First, make sure that you set _DEV = False. Run the build with npm run build and hatch build. Then publish with hatch publish. We publish using tokens so when asked, set the username to __token__ and then use your token as the password. Alternatively, create a .pypirc file.