Thanks for the explanation but some how my code fail and since I don't need multiple inheritance for the moment, I would settle for the not so clean version.
The documentation of super is not very clear to me too. As seen in my code, I am using classmethod which may cause some problem. Steve Holden wrote: > In point of fact super() is most useful when you *do* have multiple > inheritance. The classic example is when classes B and C have a common > supertype A, and then class D is a subclass of both B and C. > > Under these circumstances (the so-called "diamond-shaped inheritance > graph") it can be problematic to ensure that each superclass's methods > are called exactly once when methods are being extended rather than > overridden: should a D call B's method, which then calls A's, and if so > how does a D ensure that C's method gets called without it also calling > A's method. > > Calls to super() are used to effectively place a linearised oredering on > the superclasses to ansure that the diamond-shaped inheritance pattern > is correctly handled to give the correct method resolution order. > > regards > Steve > -- > Steve Holden +44 150 684 7255 +1 800 494 3119 > Holden Web LLC www.holdenweb.com > PyCon TX 2006 www.python.org/pycon/ -- http://mail.python.org/mailman/listinfo/python-list
