[Zope] How do I get an attribute from object, without aquisition

I am trying to get at an attribute from an object. First I check if it exists via "hasattr(obj, id)" but the problem is that there are other objects with the id further up in the aquisition chain. So I get some objects that I don't want. How do i limit my hasattr() to just an object and not the aquisitioned attributes ?? regards Max M