On Jul 28, 10:00 am, Steven D'Aprano <[EMAIL PROTECTED] cybersource.com.au> wrote: > Cutting to the crux of the discussion... > > On Sun, 27 Jul 2008 23:45:26 -0700, Carl Banks wrote: > > I want something where "if x" will do but a simple explicit test won't. > > Explicit tests aren't simple unless you know what type x is. If x could > be of any type, you can't write a simple test. Does x have a length? Is > it a number? Maybe it's a fixed-length circular length, and the length is > non-zero even when it's empty? Who knows? How many cases do you need to > consider?
Use case, please. I'm asking for code, not arguments. Please give me a piece of code where you can write "if x" that works but a simple explicit test won't. (Note: I'm not asking you to prove that "if len(x)!=0" might fail for some contrived, poorly-realized class you could write. I already know you can do that.) Carl Banks -- http://mail.python.org/mailman/listinfo/python-list
