update attribute - (newbie)

[Gabriel Genellina]

At Tuesday 19/12/2006 11:49, Larry Bates wrote:

> > I would like to have it that when I ask for p, method _get_p is always
> > called so that attribute can be updated. How can I have this
> > functionality here? thanks
> >
>Something like this?
>
>class A:
>     def __init__(self):
>         self.t=4
>         return
>
>     def __getattr__(self, name):
>         if name == 'p': return self.t
>         else: return self.__dict__[name]

__getattr__ is called *after* normal lookup has failed, so using 
__dict__ here is useless (and wrong, because this method should raise 
AttributeError but will raise KeyError instead)
A property is more convenient in this case.


-- 
Gabriel Genellina
Softlab SRL 


	

	
		
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