Easy parameter specification using dataclasses made using the attr library. It comes with following advantages compared to other parametrisation schemes (eg. jsons)

1. No KeyErrors
2. Typed
3. Default values so only need to specify changes - (compared this to maintaining tons of json files for each configuration)
4. All attr features for free. Eg. validators, comparators etc.
5. Intellisense in ide
6. Both dict-like and dot access
7. Interconversion to/from dict as well as flattened dict
8. Easy De/serialisation from/to json and yaml.
9. Direct instantiation of objects from parameters specifying constructor arguments.
10. Flexible + automatic disambiguation
11. Easy hyper-parameter search
12. And last but not the least, almost no overhead!

See this notebook for examples of usage and features.