On Tue, 2 Dec 2008 at 23:21, Faheem Mitha wrote:
> Yes, I was looking for this, and printed out obj.__dict__ but didn't
> see it there. A dictionary of attributes is very useful in theory, but
> doesn't always seem to have all attributes. Is this documented
> anywhere?

Try dir(obj).  You'll see it there.  The __dict__ is only for instance
attributes.

>> Not too difficult.  You can also use type(obj) instead of
>> obj.__class__.
>
> I thought of trying this, but didn't. It didn't seem likely to work,
> anyway. Is either of these preferred over the other in terms of API
> stability, and if so, why?

obj.__class__ is a python thing, as is type(obj), and neither of
those is changing in python 3.0, so I'd think both would be stable API
wise :)  However, the documentation of __class__ makes it clear you
get the class back, while the documentation of the 'type' built in
function does not...so I'd lean toward using __class__, myself.  It
also means you'll get an earlier error if you accidentally pass
something that is not actually a class instance into your function.

--RDM

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