simple question re list iteration semantics
Esmail
ebonak at hotmail.com
Tue Apr 21 23:11:56 EDT 2009
Paul Rubin wrote:
> Esmail <ebonak at hotmail.com> writes:
>> for i in range(0, len(li)):
>> print li[i]
>>
>> Will this always be equivalent to
>>
>>
>> for i in li:
>> print i
>
> Not the same--after the exit of the first loop, 'i' is the length of
> the list. After the exit of the second loop, 'i' is the last element.
Yes, agreed.
> If you want to have the numeric index available in the loop, use:
>
> for i,x in enumerate(li):
> ...
>
> then i is the index and x is the element.
ah .. very nice, I didn't know this -- thanks!
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