non-copy slices

Tim Golden mail at
Wed Nov 18 16:44:51 CET 2009

tbourden at wrote:
> Hi,
> I was looking for a facility similar to slices in python library that would
> avoid the implicit creation of a new list and copy of elements that is the
> default behaviour. Instead I'd rather have a lazy iteratable object on the
> original sequence. Well, in the end I wrote it myself but I was wondering if
> I missed sth in the library. If I didn't is there a particular reason there
> isn't sth like that? I find it hard to believe that all slice needs have
> strictly copy semantics.

I suspect that itertools is your friend, specifically itertools.islice


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