[Python-Dev] Re: PEP 276 (simple iterator for ints)
Nicolas Fleury
nidoizo at yahoo.com
Mon Jul 5 00:07:25 CEST 2004
Andrew Koenig wrote:
>>IMO it would be clearer, and equally elegant, to write
>>this as something like
>>
>> for i in indices(myList):
>> ...
> I think that
>
> for i in myList.keys():
>
> would be even better, because it allow the same usage for dict and list. Of
> course that wouldn't generalize to other sequences that support len.
Wouldn't be better then that indices returns the keys for a dictionary
instead? It would then support all these sequences. Maybe an index is
not the good term to generalize, but I don't think key is really better,
particularly since I would expect the use of a dictionary to be more rare.
Maybe another function, let's say accesses, could be used for these rare
cases, adding no overhead for common cases of indices:
for key in accesses(myDict): pass
for index in accesses(myList): pass
But since iterating through a dictionary means to iterate through the
keys, while it means to iterate through the elements for a list, would
that be really uniform to support generalization with dictionaries? Is
it useful?
Regards,
Nicolas
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