[Python-Dev] Candidate Itertools

[Aahz]

On Tue, Jun 15, 2004, Raymond Hettinger wrote:
>
> Feedback is requested for two prospective itertools:
> 
> def count_elements(iterable):
>     b = {}
>     for elem in iterable:
>         b[elem] = b.get(elem, 0) + 1
>     return ((cnt, elem) for elem, cnt in b.iteritems())

+1 provided it returns either (elem, cnt) or the dict itself.

> def pairswap(iterable):
>     return ((b,a) for a,b in iterable)

-1 -- too trivial.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"Typing is cheap.  Thinking is expensive."  --Roy Smith, c.l.py