> To: [email protected]
> From: [email protected]
> Date: Fri, 13 Nov 2015 09:26:55 +0100
> Subject: Re: [Tutor] question about descriptors
>
> Albert-Jan Roskam wrote:
>
> >> __getattr__() is only invoked as a fallback when the normal attribute
> >> lookup fails:
> >
> >
> > Aha.. and "normal attributes" live in self.__dict__?
>
> I meant "normal (attribute lookup)" rather than "(normal attribute) lookup".
> __getattr__() works the same (I think) when there is no __dict__:
>
> >>> class A(object):
> ... __slots__ = ["foo"]
> ... def __getattr__(self, name):
> ... print "looking for", name
> ... return 42
> ...
> >>> a = A()
> >>> a.foo
> looking for foo
> 42
> >>> a.__dict__
> looking for __dict__
> 42
> >>> a.foo = "bar"
> >>> a.foo
> 'bar'
Thank you again for the explanation. Much appreciated. I had not even thought
about __slots__ yet.
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