On Mon, Mar 28, 2011 at 2:11 PM, Daniel Stutzbach <stutzb...@google.com> wrote: > Is there a good use-case for the func argument? I can only think of bad > use-cases (where "func" does something that does not remotely resemble > addition). I fear that people will actually implement these bad use-cases, > and I will have to try to read and understand their code. > Adding the func argument seems analogous to adding a func argument to sum(), > which would give it all of the power of reduce().
The difference lies in the fact that, because accumulate is an iterator that yields a *running* result, the two corner cases that make reduce problematic in practice (i.e. correctly handling empty and 1-item input iterables) are handled naturally. The examples that Raymond gives in the docs (cumulative multiplication, running min/max, cash flow accumulation) look fairly solid to me. Cheers, Nick. -- Nick Coghlan | ncogh...@gmail.com | Brisbane, Australia _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
