Initializing an attribute that needs the object

David Pratt fairwinds at eastlink.ca
Fri Jun 2 23:47:43 CEST 2006


My apologies. What I meant to write was this

class Factory

  	def __init__(self, handler):



David Pratt wrote:
> Hi Marco. Thanks for your reply. I am providing the handler with the 
> factory instance as I have shown. This is how my code currently works. 
> What I am trying to figure out is how to possibly provide the handler in 
> the constructor when it needs the factory instance. This would give me 
> some better flexibility.
> 
> ie.
> 
> class Factory
> 
> 	def __init__(self, factory):
>   		
> At this point I don't have self. Would super help me?
> 
> Regards,
> David
> 
> 
> Marco Giusti wrote:
>> On Fri, Jun 02, 2006 at 06:15:28PM -0300, David Pratt wrote:
>>> 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. 
>>> Would I use a super for this sort of thing? Many thanks
>> when __init__ is called the object already exists.
>>
>>> class Factory:
>>>
>>> 	def __init__(self):
>>> 		self.some_handler = Handler(self)
>>>
>>> f = Factory()
>>> f.some_handler = AnotherHandler(f)
>> try this, should works:
>>
>> class Factory:
>>
>>     def __init__(self):
>>         self._some_handler = AnotherHandler(self)
>>
>> maybe a class hierarchy is good for you
>>
>> ciao
>> m.
>>



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