[issue31975] Add a default filter for DeprecationWarning in __main__

[R. David Murray]

R. David Murray <rdmurray at bitdance.com> added the comment:

It was never about putting the interests of the app developers first, it was about putting the interests of the users first: not being pestered by seeing deprecation warnings they can't do anything about.

So yeah, maybe a PEP explaining the logic would be helpful, since there seems to be disagreement about what the logic is.  I'm not in a position to write it, though.

Maybe it would indeed be worth it to push this change into Fedora/RedHat and see what the response is before doing it in core?  Kind of the same principle as putting something on pypi before putting in the stdlib.

Also note that *no matter what you do* adding keywords is painful.  That's why we try really really hard not to do it.

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<https://bugs.python.org/issue31975>
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