[Python-Dev] for...else (original) (raw)

Rob Cliffe rob.cliffe at btinternet.com
Fri Jul 28 18:11:25 EDT 2017

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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