On Nov 29, 5:22 am, Den <patents...@gmail.com> wrote: > On Nov 26, 3:01 pm, Steven D'Aprano <steve > > That is correct. You probably should rarely use `is`. Apart from testing > > for None, use of `is` should be rare. > > With respect, I disagree with advice that the use of a language > construct should be rare. All constructs should be used > *appropriately*.
Steven didn't say it _shouldn't_ be used, only that it it should be _rarely_ used. General consensus would be that that is the most appropriate use of 'is'. Value comparisons are _far_ more common in Python than identity comparisons, the ubiquitous None notwithstanding. But for your general point, I totally agree. I feel the same way about the ternary syntax, boolean defaults for conditionals etc -- http://mail.python.org/mailman/listinfo/python-list
