any() and all() on empty list?

Paul Rubin http
Wed Mar 29 05:30:53 EST 2006


Ron Adam <rrr at ronadam.com> writes:
> Just thinking about things.  I really just want what is best for
> Python in the long term and am not trying to be difficult.

I'm sorry, maybe it's the math geek in me, but I just see all those
suggestions about "not not S" as being contorted.  It's obvious to me
that all([]) should be True, that while(any(S)) should not terminate
if S is empty, etc.

Someone asked for a cite; I listed one before:

http://en.wikipedia.org/wiki/For_all

See the "Negation" section.



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