On Feb 23, 2015 9:30 AM, "Guido van Rossum" <guido@python.org> wrote:
>
> On Mon, Feb 23, 2015 at 9:01 AM, Ethan Furman <ethan@stoneleaf.us> wrote:
>>
>> On 02/23/2015 08:12 AM, Brett Cannon wrote:
>> > On Mon Feb 23 2015 at 10:55:23 AM Chris Angelico wrote:
>>
>> >> Is it at all possible for this to be introduced in the 2.x line [...]
>> >
>> > Starts with a minor version.
>>
>> Isn't there a -3 switch or something like that in 2.7.x to trigger warnings/errors to help port to 3.x?  Seems like this
>> kind of warning could go there.
>
>
> If we agree it will be a syntax error in 3.x eventually.

+1 to that FWIW.

-n