On 08.04.2015 20:30, Nathaniel Smith wrote: > On Apr 8, 2015 2:16 PM, "Andreas Hilboll" <li...@hilboll.de > <mailto:li...@hilboll.de>> wrote: >> >> Hi all, >> >> I'm commonly using function signatures like >> >> def myfunc(a, b, c=None): >> if c is None: >> # do something ... >> ... >> >> where c is an optional array argument. For some time now, I'm getting a >> >> FutureWarning: comparison to `None` will result in an elementwise >> object comparison in the future >> >> from the "c is None" comparison. I'm wondering what would be the best >> way to do this check in a future-proof way? > > As far as I know, you should be getting the warning when you write > c == None > and the fix should be to write > c is None > instead. (And this is definitely an important fix -- it's basically a > bug in numpy that the == form ever worked.) Are you certain that you're > getting warnings from 'c is None'?
My mistake; I was actually doing if p1 is None == h1 is None: instead of if (p1 is None) == (h1 is None): Sorry for the noise. -- Andreas. _______________________________________________ NumPy-Discussion mailing list NumPy-Discussion@scipy.org http://mail.scipy.org/mailman/listinfo/numpy-discussion