On Wed, Jun 27, 2018 at 12:36:12AM -0700, Michael Selik wrote: > On Tue, Jun 26, 2018, 11:43 PM Jacco van Dorp <j.van.d...@deonet.nl> wrote:
> > Generators dont have a __len__ method. And they might have min/max > > that can be calculated without iterating over the entire thing. The > > builtin range() is an example. (but also an exception, since it does > > have a __len__ attribute. This is specifically part of range and not > > generators in general, though.). range is not a generator. > > However, range() is an example where the dunders could be valuable - > > max(range(1e7)) already takes noticable time here, while it's rather > > easy to figure it out from start stop and step, just like len now does > > for it. > > > > Have you ever written ``max(range(x))`` in production code? I have never written that. But I have written ``max(iterable)`` dozens of times, where iterable could be a range object. -- Steve _______________________________________________ Python-ideas mailing list Python-ideas@python.org https://mail.python.org/mailman/listinfo/python-ideas Code of Conduct: http://python.org/psf/codeofconduct/
