[Python-ideas] PEP 505: None-aware operators

[David Mertz]

On Tue, Jul 24, 2018, 7:38 AM Rhodri James <rhodri at kynesim.co.uk> wrote:

> On 24/07/18 12:02, David Mertz wrote:
> > Every use I've suggested for the magic proxy is similar to:
> >
> >    NullCoalesce(cfg).user.profile.food
> >
> > Yes, the class is magic. That much more so in the library I published
> last
> > night that utilizes wrapt.ObjectProxy. But it's also pretty explicit in
> > that an actual*word*  announces that funny stuff is going to happen on
> the
> > same line.
>
>       Foo(cfg).user.profile.food
>
> Is that explicit that funny stuff is going to happen on the same line? I
> wouldn't generally assume so, I'd just assume the coder created a throwaway
> object to get at an attribute.


Foo isn't a very indicative name. NoneCoalesce (or NullCoalesce, or
GreedyAccess) is. But if I had any doubt, I could read the docstring for
Foo to find out how magical it was, and in what way. I definitely know
*something* is happening by creating that new instance in the line.

I'm still of the opinion that both approaches are trying to solve a
> problem that's too niche to merit them, BTW.
>

That doesn't make sense to me. You think my little library shouldn't be
allowed on PyPI? I don't force the couple classes on anyone, but if they
happen to help someone (or PyMaybe, or some other library, does) they don't
change anything about Python itself. Syntax is a very different matter.

>
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