On Tuesday 21 October 2003 09:27 am, Greg Ewing wrote: ...
But maybe some other keyword could be added to ease any syntactic problems, such as "all" or "every":
sum(all x*x for x in xlist) sum(every x*x for x in xlist)
The presence of the extra keyword would then distinguish an iterator comprehension from the innards of a list comprehension.
Heh, you ARE a volcano of cool syntactic ideas these days, Greg.
As between them, to me 'all' sort of connotes 'all at once' while 'every' connotes 'one by one' (so would a third possibility, 'each'); so 'all' is the one I like least.
Besides accumulators &c we should also think of normal loops:
for a in all x*x for x in xlist: ...
for a in every x*x for x in xlist: ...
for a in each x*x for x in xlist: ...
Of these three, 'every' looks best to me, personally.
Alex
I'd rather reserver these keywords for conditions using quantifiers, like in ABC. --Guido van Rossum (home page: http://www.python.org/~guido/)