I want a class that encapsulates data with some meta information. The data changes during runtime. I want to safe it for evaluation. The class looks like this: from dataclasses import dataclass, replace, _DataclassT @dataclass class Encapsulated[P: ???]: # <- What to specify here? type: int payload: P def record(self) -> P: return replace(self.payload) As you can see, I have no requirements with regard to P except that is has to be a Dataclass that can be used in dataclasses.replace. For example: @dataclass class Payload: val: int = 0 I tried object which fails for obvious reasons. I find _DataclassT inappropriate because of it being private. Also: It doesn't work. Continue reading...
