Make LarvaDataset available for import in lib.reg

[bagjohn]

LarvaDataset is the main dataset class located in lib.process.dataset.py.
Ideally it should be available for import in various modules including in lib.reg in order to specify argument type in methods or functions that take a LarvaDataset object as an argument
BUT when trying to import it in eg lib.reg.parFunc.py there is an import error namely partially initialized module 'larvaworld.lib.reg'
See the failed test in the workflow

What refactoring should be done to make this possible?

[almoehi]

As the error suggests - to core issue is resolving circular dependencies.
dataset imports reg => reg imports dataset => circle

Probably the only way to resolve this is to refactor to keep the DataSet class pure (no dependencies to other modules).
It would basically just be an empty class to define the interface of "dataset" types. And then each actual dataset implementation us a sub-class of that parent type.

Then you would only use that pure DataSet class for type hinting method arguments / return types.