[Python-Dev] Redirecting warnings.showwarning to logging

[Sidnei da Silva]

On Sat, Nov 22, 2008 at 9:12 AM, Vinay Sajip <vinay_sajip at yahoo.co.uk> wrote:
> Brett Cannon has suggested [1] that the logging package should provide an
> implementation of warnings.showwarning which redirects to logging. Here are my
> first thoughts about how this might work:
>
> A new function, showwarning( message, category, filename, lineno[, file]) will
> be added to the logging package. To redirect all warnings to the logging system,
> it will only be necessary to do the following:
>
> warnings.showwarning = logging.showwarning
<snip>
>
> Does this sound like a reasonable approach? Can someone please suggest any
> improvements, or let me know if I've missed anything?

I do have one suggestion for improvement: instead of requiring the
person to do this monkey patching, add a new 'log' action to the
warnings filter as described by PEP 230 [1] (see: 'The Warnings
Filter' section). This way, changing the behavior of how warnings are
displayed (or not) is kept consistent and documented.

[1] http://www.python.org/dev/peps/pep-0230/

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