[Python-Dev] 'warnings' module changes still breaking Twisted, still looking for a fix

[glyph at divmod.com]

On 10:18 pm, musiccomposition at gmail.com wrote:
>That's why catch_warning keeps track of the warnings filter too, so
>you can call warnings.simplefilter("always") within the context
>manager and the filter state will be restored.

Thanks for the pointer - this is interesting.  I misunderstood the way 
the warnings filter worked.  It looks like this combination of features 
may in fact be all we need.  It would be nice if application code could 
otherwise "officially" keep track of the warnings filter (my 
understanding is that 'filters', despite the public-looking name, is 
private, since it is absent from the documentation?) but that doesn't 
sound like a release blocker.