April 5, 2012
8:49 p.m.
Oleg Broytman wrote:
On Thu, Apr 05, 2012 at 11:56:00AM -0700, Ethan Furman wrote:
It's only an error if it's documented that way and, more importantly, thought of that way. The re module is a good example: if it can't find what you're looking for it returns None -- it does *not* raise a NotFound exception.
But open() raises IOError. ''.find('a') returns -1 but ''.index('a') raises ValueError. So we can argue in circles both ways, there are too many arguments pro and contra. Python is just too inconsistent to be consistently argued over. ;-)
Indeed -- I think we have reached an agreement! Now if you'll just agree that returning None in this case is better... ;) ~Ethan~