Martin Blais wrote: > I don't know > what lives in the iterable, so why should I make assumptions? > > I think Python needs a builtin for this very purpose. I propose > 'nodef', a unique object whose sole purpose is to serve as a default > value.
If the aforementioned iterable can yield *anything*, then it might yield this 'nodef' value as well. For this reason, there *can't* exist any *standard* guaranteed-unambiguous sentinel value. Each use case needs its own, to ensure it's truly unambiguous in the context of that use case. -- Greg Ewing, Computer Science Dept, +--------------------------------------+ University of Canterbury, | Carpe post meridiem! | Christchurch, New Zealand | (I'm not a morning person.) | [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
