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

[Giampaolo Rodola']

On Sun, Jul 22, 2018 at 11:51 PM Giampaolo Rodola' <g.rodola at gmail.com> wrote:
>
> On Sun, Jul 22, 2018 at 10:55 PM Chris Angelico <rosuav at gmail.com> wrote:
> >
> > On Mon, Jul 23, 2018 at 6:43 AM, Giampaolo Rodola' <g.rodola at gmail.com> wrote:
> > > On Sun, Jul 22, 2018 at 10:01 PM Chris Angelico <rosuav at gmail.com> wrote:
> > >>
> > >> On Mon, Jul 23, 2018 at 1:09 AM, Giampaolo Rodola' <g.rodola at gmail.com> wrote:
> > >> > On Sun, Jul 22, 2018 at 3:38 PM Chris Angelico <rosuav at gmail.com> wrote:
> > >> > I find it less explicit mainly because it does 3 things at once: check
> > >> > if attribute is None, use it if it's not None and continue the
> > >> > evaluation from left to right. I find that logic to be more explicit
> > >> > when living on different lines or is clearly delimited by keywords and
> > >> > spaces. ? has no spaces, it's literally "variable names interrupted by
> > >> > question marks" and evaluation can stop at any time while scanning the
> > >> > line from left to right. Multiple "?" can live on the same line so
> > >> > that's incentive to write one-liners, really, and to me one-liners are
> > >> > always less explicit than the same logic split on multiple lines.
> > >>
> > >> Ah, I see what you mean. Well, think about what actually happens when
> > >> you write "lst.sort()". In terms of "hidden behaviour", there is far
> > >> FAR more of it in existing syntax than in the new proposals.
> > >
> > > I am not sure I'm following you (what does lst.sort() have to do with "?"?).
> >
> > The "." in "lst.sort" is an operator. How much hidden behaviour is
> > there in that? Do you actually even know every possible thing that can
> > happen? Don't feel bad if you don't - it's not an indictment of your
> > quality as a programmer, but an acknowledgement that Python's
> > attribute access is incredibly complicated.
>
> I'm going to engage into a discussion [...]

s/I'm going/I'm not going

-- 
Giampaolo - http://grodola.blogspot.com