Ron Adam wrote: > Carl Banks wrote: > > > In Python, yes and no are the only possible answers. Probably the only > > analogous thing you could do in Python would be for all() to raise > > ValueError when passed an empty sequence. > > There is also 'None' which serves a similar purpose of indicating an > invalid value when passing arguments.
If all() were to return None, then if would essentially be like returning False, because an if-statement would treat False and None the same (as would most anything else expecting a boolean value). The only reasonable way to say "false assumption" in Python is to raise an exception. Carl Banks -- http://mail.python.org/mailman/listinfo/python-list
