Slightly tangential, but I've found importlinter neat for restricting what layers in your Python code can call each other (in this case by restricting imports,

Slightly tangential, but I've found importlinter neat for restricting what layers in your Python code can call each other (in this case by restricting imports, not calls): https://pypi.org/project/import-linter/ https://pypi.org/project/import-linter/ For example, you can ensure lower-level packages don't import higher-level ones: [importlinter:contract:my-layers-contract] name = Layered architecture type = layers layers = mypackage.cli # can import anything mypackage.services # can't import from mypackage.cli mypackage.models # can't import from .cli or .services