[Python-Dev] for...else (original) (raw)
Larry Hastings larry at hastings.org
Sat Jul 29 20:48:37 EDT 2017
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As previously requested: please take this discussion to python-ideas.
If you reply, remove python-dev from the To: and Cc: lists, and add
python-ideas instead. This speculative discussion was never appropriate
for python-dev.
//arry/
On 07/28/2017 03:11 PM, Rob Cliffe wrote:
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: dosomething else: dosomethingcompletelydifferent 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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