[Python-3000] Iterators for dict keys, values, and items == annoying :)

[Nick Coghlan]

Brett Cannon wrote:
> On 3/23/06, Guido van Rossum <guido at python.org> wrote:
>> (Off-topic: maybe we can drop the fall-back behavior
>> of iter() if __iter__ isn't found?)
>>
> 
> I say yes.  Iterators will be common enough that objects that want the
> support should just directly support it.

Hmm, I'd expect the typical generator used for this to be a fair bit slower 
than the current custom sequence iterator:

   def __iter__(self):
       for i in range(len(self)):
           yield i

OTOH, it would make sense if the fallback could instead be written:

   __iter__ = itertools.iterseq

(where 'iterseq' gives a real name to the currently hidden default sequence 
iterator)

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at gmail.com   |   Brisbane, Australia
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