[Python-Dev] Proposal: go back to enabling DeprecationWarning by default (original) (raw)
Antoine Pitrou solipsis at pitrou.net
Mon Nov 6 08:39:52 EST 2017
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On Mon, 6 Nov 2017 23:23:25 +1000 Nick Coghlan <ncoghlan at gmail.com> wrote:
On 6 November 2017 at 21:58, Antoine Pitrou <solipsis at pitrou.net> wrote: > I guess my takeaway point is that many situations are complicated, and > many third-party library developers are much less disciplined than what > some of us would idealistically expect them to be (those developers > probably often have good reasons for that). For someone who takes care > to only use selected third-party libraries of high maintenance quality, > I'm very +1 on your proposal. For the more murky (but rather common) > cases of relying on average quality third-party libraries, I'm +0.
Agreed, and I'm thinking there could be a lot of value in the variant of the idea that says: - tweak the default warning filters to turn DeprecationWarning back on for main only
Thats sounds error-prone. I'd rather have them on by default everywhere.
- add a new warnings module API specifically for managing deprecation warnings
+1
And I think we need to handle two different use cases:
silencing warnings emitted by a certain module (e.g. a widely-used module which recently introduced major API changes)
silencing warnings reported in a certain module (e.g. a sporadically-maintained library whose usage frequently emits deprecation warnings coming from other libraries)
Ideally, we also need a CLI switch (or environment variable) to override these settings, so that one can run in "dev mode" and see all problematic usage accross their library, application and third-party dependencies.
Regards
Antoine.
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