On 02/23/2014 11:26 AM, Thomas Wouters wrote:
On Feb 23, 2014 7:52 PM, "Stefan Behnel" <stefan...@behnel.de <mailto:stefan...@behnel.de>> wrote:Chris Angelico, 21.02.2014 04:15: > Just as PEP 308 introduced a means of value-based conditions in an > expression, this system allows exception-based conditions to be used > as part of an expression. > [...] > This currently works:: > > lst = [1, 2, None, 3] > value = lst[2] or "No value" > > The proposal adds this:: > > lst = [1, 2] > value = lst[2] except IndexError: "No value" I see a risk of interfering with in-place assignment operators, e.g. x /= y except ZeroDivisionError: 1 might not do what one could expect, because (as I assume) it would behave differently from x = x / y except ZeroDivisionError: 1Yes. Augmented assignment is still assignment, so a statement. The only way to parse that is as x /= (y except ZeroDivisionError: 1)
Well, that is certainly not what I would have expected. I can also see how parentheses can help, but I still would like them optional. -- ~Ethan~ _______________________________________________ Python-Dev mailing list Python-Dev@python.org https://mail.python.org/mailman/listinfo/python-dev Unsubscribe: https://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
