[Python-Dev] Re: Candidate Itertools

[David Abrahams]

Aahz <aahz at pythoncraft.com> writes:

>> def pairswap(iterable):
>>     return ((b,a) for a,b in iterable)
>
> -1 -- too trivial.

Yeah, shouldn't any sequence-returning functions in itertools really
be returning an iterator adaptor?  After all, what if iterable is
reading from a file?

What we need is a lazy views library.

-- 
Dave Abrahams
Boost Consulting
http://www.boost-consulting.com