On Wed, Jul 29, 2020 at 02:51 Mathew Elman <mathew.elman@ocado.com> wrote:

.

If it *is* useful, it occurs to me that (1) this looks a lot like the
try ... except ... pattern, and (2) breaks are generally perceived as
exceptional exits from a loop.  Instead of "if break [LABEL]", "except
[LABEL]" might work, although the semantic difference between labels
and exceptions might get a ton of pushback.

...

Steve

 

In the related thread I suggested using `except`, but it was largely ignored.

*If* you want tou propose clearer syntax for this, please extend the loop syntax, not the ‘if’ syntax. So, ‘case ... zero’ makes more sense than ‘if [not] break’.

 

—Guido

 

So I understand, does this mean that any extended syntax for this should be totally new and not draw on existing constructs such as `try-except` or `if-else`?

Or just that the additional clarity should come from  extending the loop rather than the implicit `if`?

Actually, given that ‘else:’ already confuses people I very much doubt that any other new construct will be acceptable. It is totally five not to “solve” this problem at all — all use cases can be done by adding flag variables explicitly manipulated by the user’s code.

Mathew

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--Guido (mobile)