c[:]()

[Erik Max Francis]

Steven D'Aprano wrote:

> On Tue, 05 Jun 2007 18:26:50 -0400, Terry Reedy wrote:
> 
>> "Warren Stringer" <warren at muse.com> wrote in message
>> news:015701c7a7a4$584fac00$240110ac at Muse... | I am porting code that
>> only uses this form |    a[:4]b()
>> |
>> | Which translates to:
>> |
>> | for i in range(4):
>> |    a[i].b()
>>
>> Or, more directly and perhaps more efficiently:
>>
>> for e in a[:4]: e.b()
> 
> I'm thinking that is more efficient only because four is a small number. 
> If you wanted to iterate over the first 2**22 items in a list of 2**22+1 
> items, making a copy of the sub-list first would probably be a bad idea :)

Then again, in that case, so would making a list of the indices with 
`range`, which is what the original poster was suggesting.

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
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