Ooops. My proof on anti-concept has a flaw. It only "shadows" names that
already exist. Presumably that's the wrong idea, but it's easy enough to
change if desired.
On Sun, Apr 29, 2018 at 5:24 PM, Paul Moore <p.f.mo...@gmail.com> wrote:
> On 29 April 2018 at 21:20, Tim Peters <tim.pet...@gmail.com> wrote:
> > As covered most recently in an exchange with Tim Delaney, best I can
> > tell absolutely nobody has wanted that. By "sublocal scope" they
> > don't mean a full-fledged new scope at all, but a kind of limited
> > "shadowing" of a handful of specific, explicitly given names. It acts
> > like a context manager, if there were a way to clearly spell
> >
> > save the current state of these specific identifiers at the start (&
> I
> > couldn't care less whether they're local, nonlocal, or global - I
> > don't know & don't care)
> >
> > then execute the code exactly as if this gimmick had never been used
> >
> > then, at the end, restore the specific identifier states we saved
> > at the start
>
> So maybe adding such a primitive (maybe something live states =
> sys.get_variable_state('a', 'b', 'c') and
> sys.set_variable_state(states)) would be useful? Of course, we've
> moved away from real use cases and back to theoretical arguments now,
> so it's entirely possible that doing so would only solve problems that
> no-one actually has... David Mertz' sublocal context manager would be
> a good prototype of such a thing - at least good enough to demonstrate
> that it's of no benefit in practice <wink>
>
> Paul
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