[Python-Dev] fmod.c

[Paul Hankin]

Hi all,

Is there any need for Python/fmod.c any more? I can't see how
it can be included because there's no test for fmod in the
./configure script and grepping all files in the tree for fmod.c
finds nothing except a commented out line in PC/os2vacpp/makefile.omk

If it is needed, it needs fixing as it gives the wrong answer
for x>=0 and y<0.
Eg:
fmod(0, -1) returns 1 rather than 0.

(The comment in fmod.c is correct: it should return f such that
x = i*y + f for some integer i, st |f| < |y| and f has the same
sign as x).

I'm happy to patch it, but I won't if it would be better just
to remove the file.

-- 
Paul Hankin

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Re: [Python-Dev] Some new additions to functools

[Paul Hankin]

On 4/15/07, SevenInchBread <[EMAIL PROTECTED]> wrote:
> So I've cooked up some very simple functions to add to functools - to expand
> it into a more general-purpose module.
>
> def cat(x): return x
>
> class nullfunc(object):
> def __call__(self, *args, **kargs): return self
> def __getattr__(self, name):return getattr(None, name)
>
> def multimap(func, seq, n=2):
> assert n > 0, "n must be positive"
> if n == 1: return map(func, seq)
> else:   return map(lambda x: multimap(func, x, n-1), seq)
>
> def multifilter(func, seq, n=2):
> return multimap(lambda x: filter(func, x), seq, n-1)
>
> def multireduce(func, seq, n=2):
> return multimap(lambda x: reduce(func, x), seq, n-1)

-0 for cat (renamed to 'identity'), -1 for the rest.

I've occasionally wanted multimap but only in the default
case where it is simpler to be explicit.

-- 
Paul Hankin
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