[Python-ideas] Possible PEP 380 tweak
__peter__ at web.de
Tue Oct 26 10:12:54 CEST 2010
Guido van Rossum wrote:
>> I like your example because it matches the way I would have used
>> generators to solve it. OTOH, it is not hard to rewrite parallel_reduce
>> as a traditional function. In fact, the result is a bit shorter and
>> quite a bit faster so it is not a good example of what you need
>> generators for.
> I'm not sure I understand. Maybe you meant to rewrite it as a class?
> There's some state that wouldn't have a good place to live without
> either a class or a (generator) stackframe to survive.
def parallel_reduce(items, funcs):
items = iter(items)
first = next(items)
accu = [first] * len(funcs)
for b in items:
accu = [f(a, b) for f, a in zip(funcs, accu)]
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