[Zope] Follow-up to aq_parent(aq_inner(self))-question

Hi! How can I get the product's path while instantiating it? Shouldn't this information exist somewhere? aq_parent(aq_inner(self)) returns None, which isn't totally unexpected since __init__ isn't strictly a Zope method and thus doesn't necessarily have a Zope method's context. (I need, from the __init__ method of a product, to find out its instantiation path in the ZODB.) TIA, Ole