[issue4180] warnings.simplefilter("always") does not make warnings always show up

[Benjamin Peterson]

Benjamin Peterson <musiccomposition at gmail.com> added the comment:

A simple solution would be to allow warn_explicit to be overridden. Then
a custom warn_explicit function could simply ignore the registry argument.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue4180>
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