Can __iter__ be used as a classmethod?

[Aahz]

In article <2259b0e2.0303111203.3b8147ae at posting.google.com>,
Michele Simionato <mis6 at pitt.edu> wrote:
>
>I have used that trick few days ago to define Frozen classes:
>
>def frozen(self,name,value):
>    if hasattr(self,name):
>        object.__setattr__(self,name,value) # standard __setattr__
>    else:
>        raise AttributeError("You cannot add attributes to %s" % self)
>
>class Frozen(object):
>    """Subclasses of Frozen are frozen, i.e. it is impossible to add
>     new attributes to them and their instances, except via inheritance"""
>    __setattr__ = frozen
>    class __metaclass__(type):
>        __setattr__ = frozen
>
>This kills Python dynamism. Also, it become impossible to use the
>self.var=something idiom, and one is forced to write code as in a 
>static compiled language. It protects your code against run-time
>modifications (unless one overrides __setattr__).

Why the heck didn't you use __slots__?!?!?!
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

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