Anywidget: Custom Jupyter Widgets Made Easy

Anywidget is a Python library that dramatically simplifies the process of creating custom interactive widgets for computational notebooks, running in environments like Jupyter, JupyterLab, Google Colab, VS Code, and Marimo. It's both a specification and a toolkit, allowing developers to define widget front-end code using standard ECMAScript modules (ESM) within a Python class. Currently at version 0.10.0, it features a rapid release cadence with frequent updates.