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

[Roundup Robot]

Roundup Robot added the comment:

New changeset 8adb2c6e0803 by Antoine Pitrou in branch '3.4':
Issue #4180: The warnings registries are now reset when the filters are modified.
https://hg.python.org/cpython/rev/8adb2c6e0803

New changeset 4bc60eb68d3e by Antoine Pitrou in branch 'default':
Issue #4180: The warnings registries are now reset when the filters are modified.
https://hg.python.org/cpython/rev/4bc60eb68d3e

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nosy: +python-dev

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<http://bugs.python.org/issue4180>
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