[Python-ideas] Extremely weird itertools.permutations

[Neil Girdhar]

You make a good point.  It was just a random example to illustrate that
desire for completeness.


On Mon, Oct 14, 2013 at 9:27 PM, Steven D'Aprano <steve at pearwood.info>wrote:

> On Mon, Oct 14, 2013 at 08:37:59AM -0400, Neil Girdhar wrote:
> > Actually I didn't notice that.  It seems weird to find erf in math, but
> erf
> > for complex numbers in scipy.special.  It's just about organization and
> > user discovery.  I realize that from the developer's point of view, erf
> for
> > complex numbers is complicated, but why does the user care?
>
> 99% of users don't care about math.errf at all. Of those who do, 99%
> don't care about cmath.errf. I'd like to see cmath.errf because I'm a
> maths junkie, but if I were responsible for *actually doing the work*
> I'd make the same decision to leave cmath.errf out and leave it for a
> larger, more complete library like scipy.
>
> There are an infinitely large number of potential programs which could
> in principle be added to Python's std lib, and only a finite number of
> person-hours to do the work. And there are costs to adding software to
> the std lib, not just benefits.
>
>
> --
> Steven
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