[Zope-dev] Multiple inheritance woes

[Rik Hoekstra]

> Hmm.. I know this is a python question, but DejaNews nor the Python website 
> give me the answers I am looking for:
> 
> I define a baseclass derived from CatalogAware and DTMLMethod:
> 
> class Base(CatalogAware, DTMLMethod):
>      def index_object(self):
>          # check a few things I want to know about
>          # before indexing, maybe even not allowing
>          # the indexing
>          CatalogAware.index_object(self)
> 
> 

A shot in the dark: Shouldn't this be 
CatalogAware().index_object(self)? At least this explicitly 
instanciates CatalogAware and stops raising TypeErrors. But I'm not 
sure this completely solves your problem

Rik

> Then I define a bunch of classes based on this base class:
> 
> class A(Base):
>      pass
> 
> class B(Base):
>      pass
> 
> etc.
> 
> Now, if I do the following:
> 
> a=A()
> a.index_object()
> 
> I get a TypeError:
>    unbound method must be called with class instance 1st argument
> 
> Now, I have seen all sorts of messages relating this error, but none of 
> them seem to relate to my problem...
> 
> self in Vase.index_object _is_ a class instance, a step-by-step debug 
> proves this. The python interpreter just won't accept it =(.
> 
> --
> Martijn Pieters, Web Developer
> | Antraciet http://www.antraciet.nl
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