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

[Grégory Lielens]

Maybe it would help if you mention in which context you will benefit the 
most? If the python sub-community related to this context agree "?? and 
friends" is a good idea, then it will add weight to the proposal. Else, 
probably better to forget it.

It seems related to JSON, but as I have never used it, it's a wild guess.

Anyway, it's a special pattern with deep attribute hierarchies, whose 
traversal is shortcutted when one attribute happen to be None.
This is common, with 2 exception:
 -it's rare it's really deep, or then it is arbitrarily deep and you need a 
procedural descent, not a fixed expression.
 -None break the descend, but then so does missing attributes.
You address the first with special syntax. not the second, so I suspect in 
your case the second does not happen. Or rarely happen.

Hope this will help finding why some finds the ? operators add little, 
while some others think they add enough to overcome python traditional 
operator-averse nature.


On Monday, July 23, 2018 at 1:10:03 PM UTC+2, Steve Dower wrote:
>
> On 23Jul2018 1145, Antoine Pitrou wrote:
> > 
> > Le 23/07/2018 à 12:38, Steve Dower a écrit :
> >>
> >> General comment to everyone (not just Antoine): these arguments have
> >> zero value to me. Feel free to keep making them, but I am uninterested.
> > 
> > So you're uninterested in learning from past mistakes?
> > 
> > You sound like a child who thinks their demands should be satisfied
> > because they are the center of the world.
>
> Sorry if it came across like that, it wasn't the intention. A bit of 
> context on why you think it's a mistake would have helped, but if it's a 
> purely subjective "I don't like the look of it" (as most similar 
> arguments have turned out) then it doesn't add anything to enhancing the 
> PEP. As a result, I do not see any reason to engage with this class of 
> argument.
>
> I hope you'll also notice that I've been making very few demands in this 
> thread, and have indicated a number of times that I'm very open to 
> adjusting the proposal in the face of honest and useful feedback.
>
> Cheers,
> Steve
> _______________________________________________
> Python-ideas mailing list
> Python... at python.org <javascript:>
> https://mail.python.org/mailman/listinfo/python-ideas
> Code of Conduct: http://python.org/psf/codeofconduct/
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-ideas/attachments/20180723/b6f1f907/attachment.html>