On Saturday, August 20, 2016 at 9:56:05 AM UTC+12, codew...@gmail.com wrote: > > On Friday, August 19, 2016 at 5:30:22 PM UTC-4, Lawrence D’Oliveiro wrote: > >> On Saturday, August 20, 2016 at 7:52:09 AM UTC+12, codew...@gmail.com >> wrote: >>> if any([ >>> not isinstance(src, Image), >>> mask != None and not isinstance(mask, Image), >>> not isinstance(dest, Image), >>> ]): >>> raise TypeError("image args must be Image objects") >>> >>> Or equivalently: >>> >>> if not all([ >>> isinstance(src, Image), >>> mask is None or isinstance(mask, Image), >>> isinstance(dest, Image), >>> ]): >>> raise TypeError("image args must be Image objects") >> >> Using “all” or “any” in this sort of situation may not be such a good >> idea. > > Would you care to elaborate?
There is no short-cut evaluation when constructing tuples and lists. -- https://mail.python.org/mailman/listinfo/python-list