[Python-Dev] PEP 565: Show DeprecationWarning in __main__

[Antoine Pitrou]

On Mon, 13 Nov 2017 22:37:46 +1100
Chris Angelico <rosuav at gmail.com> wrote:
> On Mon, Nov 13, 2017 at 9:46 PM, Antoine Pitrou <solipsis at pitrou.net> wrote:
> > On Sun, 12 Nov 2017 19:48:28 -0800
> > Nathaniel Smith <njs at pobox.com> wrote:  
> >> On Sun, Nov 12, 2017 at 1:24 AM, Nick Coghlan <ncoghlan at gmail.com> wrote:  
> >> > This change will lead to DeprecationWarning being displayed by default for:
> >> >
> >> > * code executed directly at the interactive prompt
> >> > * code executed directly as part of a single-file script  
> >>
> >> Technically it's orthogonal, but if you're trying to get better
> >> warnings in the REPL, then you might also want to look at:
> >>
> >> https://bugs.python.org/issue1539925
> >> https://github.com/ipython/ipython/issues/6611  
> >
> > Depends what you call "better".  Personally, I don't want to see
> > warnings each and every time I use a deprecated or questionable
> > construct or API from the REPL.  
> 
> Isn't that the entire *point* of warnings? When you're working at the
> REPL, you're the one in control of which APIs you use, so you should
> be the one to know about deprecations.

If I see a warning once every REPL session, I know about the deprecation
already, thank you.  I don't need to be taken by the hand like a little
child.  Besides, the code I write in the REPL is not meant for durable
use.

Regards

Antoine.