Traitlets ========= :Release: |release| :Date: |today| :home: https://github.com/ipython/traitlets :pypi-repo: https://pypi.org/project/traitlets/ :docs: https://traitlets.readthedocs.io/ :license: Modified BSD License Traitlets is a framework that lets Python classes have attributes with type checking, dynamically calculated default values, and 'on change' callbacks. The package also includes a mechanism to use traitlets for configuration, loading values from files or from command line arguments. This is a distinct layer on top of traitlets, so you can use traitlets in your code without using the configuration machinery. .. toctree:: :maxdepth: 2 using_traitlets trait_types defining_traits api config config-api utils migration changelog