There's a library: https://sumtypes.readthedocs.io/en/latest/ https://sumtypes.readthedocs.io/en/latest/ It's serviceable, and even does static checking of tot

There's a library: https://sumtypes.readthedocs.io/en/latest/ https://sumtypes.readthedocs.io/en/latest/ It's serviceable, and even does static checking of total coverage of cases. I will say that it makes linters freak out.