multiple inheritance super()

[Scott David Daniels]

rafi wrote:
> A related question is about the order of the __init__ calls. Considering 
> the following sample:
> 
> #--8<---
> class A (object):
>     def __init__ (self):
>         super (A, self) .__init__ ()
>         print 'i am an A'
> class B (object):
>     def __init__ (self):
>         super (B, self) .__init__ ()
>         print 'i am a B'
> class C (A, B):
>     def __init__ (self):
>         super (C, self) .__init__ ()
>         print 'i am a C'
> c = C ()
> 
> aerts $ python2.4 inheritance.py
> i am a B
> i am an A
> i am a C
> 
> I do understand the lookup for foo: foo is provided by both classes A 
> and B and I do not state which one I want to use, so it takes the first 
> one in the list of inherited classes (order of the declaration). However
> I cannot find an explanation (I may have googled the wrong keywords) for 
> the order of the __init__ calls from C. I was expecting (following the 
> same order as the method lookup):

This should make it clear:
     class A (object):
         def __init__ (self):
             print '<A>',
             super (A, self) .__init__ ()
             print '</A>'
     class B (object):
         def __init__ (self):
             print '<B>',
             super (B, self) .__init__ ()
             print '</B>'
     class C (A, B):
         def __init__ (self):
             print '<C>',
             super (C, self) .__init__ ()
             print '</C>'

     C()

--Scott David Daniels
Scott.Daniels at Acm.Org