On Wed, 25 Aug 2010 02:23:10 am Nitin Das wrote: > alternatively you can use the lambda , reduce function for summing up > all the numbers in a list for e.g:- > > lis = [1,2,3,4,5] > p = reduce(lambda x,y : x+y, lis) > > p will have the value = 15.
Sure, you *can* do this, by why would you re-invent the wheel like that? As an exercise to teach reduce, sure, or as a demonstration of lambda, or if you have to support Python 2.2 or older (but that's like four versions out of date!). sum() is really the only sensible way to do it these days. But if you insist on using reduce like that, it will probably be much faster to do this: import operator reduce(operator.add, lis) particularly on the older versions where sum() isn't available. -- Steven D'Aprano _______________________________________________ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
