Initializing an attribute that needs the object
fairwinds at eastlink.ca
Sat Jun 3 01:17:02 CEST 2006
Hi Bruno. This is certainly what I was missing. Thank you. I am afraid I
am behind the times with use of object. Will I only use object when I am
not subclassing? Where will I find a document that provides info on the
use of object in new style classes? Many thanks.
Bruno Desthuilliers wrote:
> David Pratt a écrit :
>> Hi. I want to have different handlers to do perform logic. The problem
>> is the Handler requires an instance of the factory since it will use its
>> own methods in conjunction with methods of the factory.
>> Once I have got a Factory instance I can give it a new handler (see
>> below). It would be more flexible if I could provide a handle in
>> constructor - but how to do this when it requires the object itself.
> Hint : Python classes are objects too.
>> class Factory:
> Do yourself a favour : use new-style classes.
> class Factory(object):
> def __init__(self, handler_class):
> self.handler = handler_class(self)
> class SomeHandler(object):
> def __init__(self, factory):
> self.factory = factory
> f = Factory(SomeHandler)
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