"Guido van Rossum" <guido at python.org> wrote in message news:200310201815.h9KIFM821583 at 12-236-54-216.client.attbi.com... > > Most of us seem to agree that having list comprehensions > > available as a replacement for map() and filter() is a good > > thing. But what about reduce()? Are there equally strong > > reasons for wanting an alternative to that, too? If not, > > why not? >> If anything, the desire there is *more* pressing. Except for > operator.add, expressions involving reduce() are notoriously hard to > understand (except to experienced APL or Scheme hackers :-). >> Things like sum, max, average etc. are expressed very elegantly with > iterator comprehensions. >> I think the question is more one of frequency of use. List comps have > nothing over e.g. >> result = [] > for x in S: > result.append(x**2) >> except compactness of exprssion. How frequent is >> result = 0.0 > for x in S: > result += x**2 >> ??? >> (I've already said my -1 about your 'sum of ...' proposal.) >> --Guido van Rossum (home page: http://www.python.org/~guido/) >> _______________________________________________ > Python-Dev mailing list > Python-Dev at python.org > http://mail.python.org/mailman/listinfo/python-dev > Unsubscribe: http://mail.python.org/mailman/options/python-dev/python-python-dev%40m.gmane.org >