Circular imports

We have some circular imports(!). We need to look into how we can refactor to remove these. This issue might very well boil down to a larger re-design, if that is the case perhaps it should handled as a separate project and/or Milestone.

The issue names no files, tests, or entry points. Start by locating the Python package's circular imports and mapping the dependency cycles; define the affected scope and whether the work needs a separate redesign project before deciding what completion means.

Written by the indexing model from the issue text.