Note to move __package__ stuff over to rpartition to make Nick happy. Also make

sure that accepting the empty string for top-level modules is okay.

Lib/importlib/NOTES

 to do
 /////
 
+* Use rpartition for getting the package of a module.
+
+    + Make sure that an empty string is acceptable for __package__.
+
 * Create meta_path importer for sys.path.
 
     + Create hook.