But in `for...else` the `else` call isn't always called, so changing `else`
for `finally` doesn't make sense. What you're suggesting is replacing `else`
with `on_finish` and adding `finally` and `on_break`.
I agree that having `finally` could make the use cases of `else` clearer,
but I am not convinced renaming "else" to "on_finish" would help the
confusion for the 0 iteration case.
I think that since this suggestion doesn't help with the 0 iteration case
(my first idea here didn't either), it feels like added extra compound
statements need to be immediately intuitive to be worth having - either
because they read like a sentence or parallel existing python e.g.
`try-except-else-finally` or `if-elif-else` etc.
On Wed, 15 Jul 2020 at 06:47, Steve Barnes <gadgetst...@live.co.uk> wrote:
> Can I suggest that for loops the `else` would be a lot clearer if it was
> spelt `finally` as was done for PEP-0341 for try blocks and that we might
> possibly need one or more `on_…` clauses such as `on_break` and `on_finish`
> I think that this would be a lot clearer:
>
>
>
> for i in range(N):
>
> if i > 3:
>
> break;
>
> on_break: # Called if loop was broken
>
> print(i)
>
> on_finish: # Called if loop was not broken
>
> print("Loop Completed")
>
> finally: # Always called (replaces for…else)
>
> print("Loop Ended")
>
>
>
> Which I think would be a lot easier for newcomers to learn than
> try…for…else…except…else e.g.:
>
>
>
> try:
>
> for i in range(N):
>
> if i > 3:
>
> break;
>
> elif i % 2 == 0:
>
> raise ValueError("Odds Only");
>
> else: # to if
>
> print(i)
>
> else: # Else to loop
>
> print("Loop Completed")
>
> except ValueError as err:
>
> print(err)
>
> else: # to try
>
> print("No Exception")
>
> finally:
>
> print("Try Ended")
>
>
>
> Where the multitude of elses makes my eyes cross.
>
>
>
> Steve Barnes
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