[issue21744] itertools.islice() goes over all the pre-initial elements even if the iterable can seek

[R. David Murray]

R. David Murray added the comment:

Then don't use itertools for that case.  itertools is designed for working with *arbitrary* iterables, and arbitrary iterables are not seekable.

I'll leave it to Raymond to decide if it is worth making a special-case optimization :)

----------
nosy: +r.david.murray, rhettinger

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue21744>
_______________________________________