[Python-Dev] Proposal: go back to enabling DeprecationWarning by default

[Barry Warsaw]

On Nov 8, 2017, at 12:02, Guido van Rossum <guido at python.org> wrote:
> 
> I hadn't seen that, but it requires too much cooperation of library owners.

Actually, mostly just setuptools and as Paul points out, pip.

Cheers,
-Barry

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