New submission from Chris Jerdonek: > Date: Thu, 6 Sep 2012 20:38:21 +0800 > To: d...@python.org > Subject: [docs] There is bug about the built-in function reduce in the > document > > I found a bug in the document about reduce : > http://docs.python.org/library/functions.html#reduce > > Here is the patch: > def reduce(function, iterable, initializer=None): > it = iter(iterable) > if initializer is None: > try: > initializer = next(it) > except StopIteration: > raise TypeError('reduce() of empty sequence with no initial > value') > accum_value = initializer > - for x in iterable: > + for x in it: > accum_value = function(accum_value, x) > return accum_value > > It duplicated the first element of iterable > > For example: > In [4]: reduce(lambda x,y:x+y, [1,2,3,4]) > Out[4]: 10 > > In [5]: docreduce.reduce(lambda x,y:x+y ,[1,2,3,4]) > Out[5]: 11
(from: http://mail.python.org/pipermail/docs/2012-September/010513.html and http://mail.python.org/pipermail/docs/2012-September/010526.html ) ---------- assignee: docs@python components: Documentation keywords: easy messages: 171419 nosy: chris.jerdonek, docs@python priority: normal severity: normal stage: needs patch status: open title: fix code example in docs for built-in reduce() type: enhancement versions: Python 2.7 _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue16077> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
