how about:
for something in some_iterable:
some_stuff_with_maybe_a_break
else if not break:
something_more
No new keywords :-)
or:
for something in some_iterable:
some_stuff_with_maybe_a_break
else: # if not break:
something_more
and no changes needed to Python!
I may actually start doing that myself ...
As for the "loop didn't run at all" case: Does anyone find a need for that?
Personally, I've found that everytime I do some kind of check for an empty
iterable before a loop, it was totally unnecessary.
A for loop means: "Do this stuff to all the items in this iterable."
Most of the time, if there's nothing there, you don't need to do the stuff,
and that's that.
-CHB
On Tue, Jul 21, 2020 at 5:28 PM Ethan Furman <et...@stoneleaf.us> wrote:
> On 7/20/20 7:34 AM, Barry Scott wrote:
>
> > To avoid the ambiguity of `if` after `for` why not follow `for` with
> `elif`?
> >
> > for x in ...:
> > ...
> >
> > elif break:
> > # break was called
> > elif not break:
> > # looped at least once and break not used
> > elif pass:
> > # same as else today
> > # loop'ed no times
> >
> > (I always have to think what else means after a for).
>
> Keep thinking... ;)
>
> `else` today /does not/ mean "loop'ed no times". To copy Steven
> D'Aprano's example:
>
> > py> for x in [1,2]:
> > ... print("inside loop")
> > ... else:
> > ... print("elif never looped")
> > ...
> > inside loop
> > inside loop
> > elif never looped
>
> > Mistaking the semantics for "if never looped" is a very common mistake.
> > Welcome to the club :-)
>
> --
> ~Ethan~
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--
Christopher Barker, PhD
Python Language Consulting
- Teaching
- Scientific Software Development
- Desktop GUI and Web Development
- wxPython, numpy, scipy, Cython
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