Efficiently iterating over part of a list

[Ziga Seilnacht]

Steven D'Aprano wrote:
[snip]
> The important thing to notice is that alist[1:] makes a copy. What if the
> list has millions of items and duplicating it is expensive? What do people
> do in that case?
>
> Are there better or more Pythonic alternatives to this obvious C-like
> idiom?
>
> for i in range(1, len(alist)):
>     x = alist[i]


for x in itertools.islice(alist, 1, len(alist)):


HTH
Ziga