[Python-Dev] Proposal: go back to enabling DeprecationWarning by default (original) (raw)

Barry Warsaw barry at python.org
Sun Nov 5 23:14:59 EST 2017

On Nov 5, 2017, at 18:05, Nick Coghlan <ncoghlan at gmail.com> wrote:

So my proposal is simple (and not really new): let's revert back to the way things were in 2.6 and earlier, with DeprecationWarning being visible by default

+1

As part of this though, I'd suggest amending the documentation for DeprecationWarning [1] to specifically cover how to turn it off programmatically (warnings.simplefilter("ignore",_ _DeprecationWarning)), at the command line (python -W_ _ignore::DeprecationWarning ...), and via the environment (PYTHONWARNINGS=ignore::DeprecationWarning).

+1

I’d also consider adding convenient shortcuts for each of these. I think DeprecationWarning is special enough to warrant it. Possibly:

warnings.silence_deprecations() python -X silence-deprecations PYTHONSILENCEDEPRECATIONS=x

Cheers, -Barry

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