[Python-Dev] for...else

[Rob Cliffe]

On 28/07/2017 20:57, MRAB wrote:
> On 2017-07-28 10:17, Michel Desmoulin wrote:
>> elif break and elif None: I'd like that very much. It's weird a break
>> the semantic of break and None, but it's in such a dark corner of Python
>> anyway I don't bother.
>>
> Surely it would not be "elif break", but "elif not break"?
To me, anything beginning with "else" or "elif" suggests an alternative 
branch, not an additional one (YMMV):
     if condition:
         do_something
     else:
         do_something_completely_different

Therefore I would find "if not break" or even "and if not break" more 
intuitive.
Best wishes
Rob Cliffe

>
>> Le 27/07/2017 à 21:19, MRAB a écrit :
>>> On 2017-07-27 03:34, Mike Miller wrote:
>>>>
>>>>
>>>> On 2017-07-26 16:36, MRAB wrote:
>>>>> "nobreak" would introduce a new keyword, but "not break" wouldn't.
>>>>
>>>> Whenever I've used the for-else, I've put a # no-break right next to
>>>> it, to
>>>> remind myself as much as anyone else.
>>>>
>>>> for...: not break: is the best alternative I've yet seen, congrats. 
>>>> Perhaps in
>>>> Python 5 it can be enabled, with for-else: used instead for empty
>>>> iterables, as
>>>> that's what I expected the first few dozen times.
>>>>
>>> For empty iterables, how about "elif None:"? :-)
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