thanks Joseph!
that got me on the right track.
it wasn't quite...
from django.models.mypp.group import Group
but...
from django.models.mypp import groups
that was needed. one problem with django i guess is figuring out what
exactly are the correct names and hierarchy, but i just took the clue
from the import line in tutorial 1 for the interactive shell and
imported the module 'groups', since I guess Group is actually just the
name of the class def, and the latter version seems more consistent
with what I see elsewhere in django. But most important i didn't
realize i could import this directly into a method of this class that
will become a module. thanks again.