are user defined classes hashable?

Hyuga hyugaricdeau at gmail.com
Tue Jul 21 20:13:35 CEST 2009


On Jul 20, 10:53 pm, a... at pythoncraft.com (Aahz) wrote:
> In article <373d6c69-6965-4a88-bdd2-8028ef850... at k6g2000yqn.googlegroups.com>,
>
> Hyuga  <hyugaricd... at gmail.com> wrote:
>
> >Regardless, Nicolas's example can be applied to the class too:
>
> >>>> class Foo(object):
> >    pass
>
> >>>> hash(Foo)
> >11443104
> >>>> id(Foo)
> >11443104
>
> >class objects are just objects of type 'type'.
>
> Not quite.  They certainly default that way, but changing the metaclass
> changes a class's type::
>
> class M(type):
>     pass
>
> class C(object):
>     pass
>
> class C2(object):
>     __metaclass__ = M
>
> print type(C)
> print type(C2)

Well, okay, you got me there.  But the OP wasn't asking about classes
with different metaclasses.  And besides, type(type(C2)) is still
type ;)



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