Mark Shannon, 15.07.2012 16:14: > Alex Gaynor wrote: >> CPython currently defines an ``__length_hint__`` method on several types, >> such >> as various iterators. This method is then used by various other functions >> (such as ``map``) to presize lists based on the estimated returned by > > Don't use "map" as an example. > map returns an iterator so it doesn't need __length_hint__
Right. It's a good example for something else, though. As I mentioned before, iterators should be able to propagate the length hint of an underlying iterator, e.g. in generator expressions or map(). I consider that an important feature that the protocol must support. Stefan _______________________________________________ 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
