[issue31975] Add a default filter for DeprecationWarning in __main__

[Antoine Pitrou]

Antoine Pitrou <pitrou at free.fr> added the comment:

> Thus the following will start emitting DeprecationWarning by default again (as they did in 2.6 and earlier):
> - experiments at the REPL

This is backwards.  If there's one place where you *don't* want stderr polluted with warnings (or any kind of logging), it's an interactive prompt.

More generally, I think this entire proposal is unsound, and needs a PEP written to make its case clearly.

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nosy: +pitrou

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