On Thu, 12 Mar 2020 at 14:09, Paul Moore <p.f.mo...@gmail.com> wrote:
>
> On Thu, 12 Mar 2020 at 16:57, Eric Wieser <wieser.eric+nu...@gmail.com> wrote:
> >
> > It looks like actually this can be be built as a function today:
> >
> > def move(name):
> > return inspect.currentframe().f_back.f_locals.pop(name)
> >
> > Which works as follows, but it feels awkward to pass variable names by
> > strings (and will confuse linters):
> >
> > >>> for v in itertools.combinations([1, 2, 3], 1):
> > ... print(id(move("v")))
> > 1718903397008
> > 1718903397008
> > 1718903397008
>
> I'm both impressed and horrified by this :-)
>
Even - it just works because it is on the top-level
scope of a module - and would not work
if called from a function, where `locals()` modification
actually do not affect the local variables.
(And that behavior that was sort of "in the air" was
well documented and defined prior to Python 3.8
in PEP 558)
But for the module-level-scope locals() == globals() is just a
plain dictionary, not one working as a proxy to slotted local variables
(And in a class body, locals() is watever is returned from the metaclass
`__prepare__` method )
> Paul
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