Sequence splitting

[Brad]

On Jul 2, 9:40 pm, "Pablo Torres N." <tn.pa... at gmail.com> wrote:
>
> If it is speed that we are after, it's my understanding that map and
> filter are faster than iterating with the for statement (and also
> faster than list comprehensions).  So here is a rewrite:
>
> def split(seq, func=bool):
>         t = filter(func, seq)
>         f = filter(lambda x: not func(x), seq)
>         return list(t), list(f)
>

In my simple tests, that takes 1.8x as long as the original solution.
Better than the itertools solution, when "func" is short and fast. I
think the solution here would worse if func was more complex.

Either way, what I am still wondering is if people would find a built-
in implementation useful?

-Brad