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Mon Apr 28 10:26:22 CEST 2008 · https://mail.python.org/pipermail/python-dev/2008-April/078923.html

Brett Cannon <brett <at> python.org> writes:
> As http://bugs.python.org/issue2705 points out, though, since the
> function has been documented as being allowed to be overridden, this
> potentially breaks existing showwarning() implementations. That means
> something needs to change.
> 
> One option is to introduce a new function. But what to name it?
> show_warning()? That small of a name change seems like asking for
> trouble, but showwarning_ex() just seems wrong to use in Python code.

But then what happens if a library overrides one of the callbacks and another
library overrides the other one? Fixing the original "problem" seems to
introduce other hairier ones.

As a Benjamin pointed out in the bug comments, the sane solution would be to
keep an unique callback and mention the small change in the release notes.

Regards

Antoine.

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[Python-Dev] Dealing with a desired change to warnings.showwarning()