[issue2407] warnings.filterwarnings() not isolated between tests

[Jerry Seutter]

New submission from Jerry Seutter <jseutter at gmail.com>:

Some tests were not cleaning up warning filters.  Fixed the problem by
making regrtest.py restore default filters before each module is executed.

This exposed other errors which are also fixed in the patch.

The patch only affects test files.

----------
components: Tests
files: warnings_fix.patch
keywords: patch, patch
messages: 63984
nosy: jseutter
priority: low
severity: normal
status: open
title: warnings.filterwarnings() not isolated between tests
versions: Python 2.6
Added file: http://bugs.python.org/file9739/warnings_fix.patch

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