Guido van Rossum wrote: > I just finished debugging some code that broke after upgrading to > Python 2.4 (from 2.3). Turns out the code was testing list iterators > for their boolean value (to distinguish them from None). In 2.3, a > list iterator (like any iterator) is always true. In 2.4, an exhausted > list iterator is false; probably by virtue of having a __len__() > method that returns the number of remaining items.
This seems like a misfeature to me. In fact I think an iterator having a len() method at all is a misfeature -- the concept doesn't make sense. -- Greg Ewing, Computer Science Dept, +--------------------------------------+ University of Canterbury, | A citizen of NewZealandCorp, a | Christchurch, New Zealand | wholly-owned subsidiary of USA Inc. | [EMAIL PROTECTED] +--------------------------------------+ _______________________________________________ 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
