En Sun, 07 Sep 2008 14:30:09 -0300, Mensanator <[EMAIL PROTECTED]> escribió:
> Actualy, I already get the behaviour I want. sum([1,None])
> throws an exception. I don't see why sum([]) doesn't throw
> an exception also (I understand that behaviour is by design,
> I'm merely pointing out that the design doesn't cover every
> situation).
[...]
> Exactly. That's why I would prefer sum([]) to raise an
> exception instead of giving a false positive.
The built in behavior can't be good for every usage. Nobody prevents you from
defining yoru own function tailored to your own specs, like this:
def strict_sum(items):
items = iter(items)
try:
first = items.next()
except StopIteration:
raise ValueError, "strict_sum with empty argument"
return sum(items, first)
Tweak as needed. Based on other posts I believe your Python skills are enough
to write it on your own, so I don't see why you're complaining so hard about
the current behavior.
--
Gabriel Genellina
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