[Python-Dev] __package__ attribute

What are expected values for module.__package__? I see two different behaviors: importlib and standard python import. importlib processes __package__ pretty simple and clean: - for toplevel modules __package__ is empty string - for packages it's package name - for modules inside packages it's again package name Standard import follows another strategy: - it tries to setup __package__ only in case of relative import (see first 'if' in import.c:get_parent) - otherwise __package__ is untouched and None by default. For me importlib's way is better. I don't see any PEP specifying __package__ behavior.