On 22/02/2014 16:36, Brett Cannon wrote:

On Sat, Feb 22, 2014 at 4:13 AM, Antoine Pitrou <solipsis@pitrou.net> wrote:
On Fri, 21 Feb 2014 09:37:29 -0800
Guido van Rossum <guido@python.org> wrote:
> I'm put off by the ':' syntax myself (it looks to me as if someone forgot a
> newline somewhere) but 'then' feels even weirder (it's been hard-coded in
> my brain as meaning the first branch of an 'if').

Would 'else' work rather than 'then'?

thing = stuff['key'] except KeyError else None

That reads to me like the exception was silenced and only if there is no exception the None is returned, just like an 'else' clause on a 'try' statement.

I personally don't mind the 'then' as my brain has been hard-coded to mean "the first branch of a statement" so it's looser than being explicitly associated with 'if' but with any multi-clause statement.

I read except as 'except if', and : as 'then' (often), so the main proposal reads naturally to me.  I'm surprised to find others don't also, as that's the (only?) pronunciation that makes the familiar if-else and try-except constructs approximate English.

Isn't adding a new keyword (then) likely to be a big deal? There is the odd example of its use as an identifier, just in our test code:

Jeff Allen