Here is a simple code: from Acquisition import Implicit, aq_base class A(Implicit): pass class C(Implicit): pass class B(Implicit): def __of__(self, parent): # controls the wrapper used for acquisition c = C() c._parent = parent return c.__of__(parent) a = A() a.b = B() print a.b # returns <C instance at XXX> print aq_base(a.b) # returns the same <C instance at XXX> It seems there is no way to get the real 'b' attribute from a, i.e. the B instance set at the line "a.b = B()" The problem is that I want to do something like this: aa = A() cc = aq_realget(a, 'b').__of__(aa) where aq_realget would return the B instance without to try to put it in the context of a. some idea? thanks in advance. -- Julien Jalon http://www.nuxeo.com