Reduce the number of test-suite DeprecationWarnings; start adding

resetwarnings() calls too.

Lib/test/test___all__.py

@@ -158,3 +158,5 @@ check_all("weakref")
 check_all("webbrowser")
 check_all("xdrlib")
 check_all("zipfile")
+
+warnings.resetwarnings()

Lib/test/test_coercion.py

 import copy
 import sys
+import warnings
 
 # Fake a number that implements numeric methods through __coerce__
 class CoerceNumber:
@@ -109,5 +110,11 @@ def do_prefix_binops():
                 else:
                     print '=', x
 
-do_infix_binops()
-do_prefix_binops()
+warnings.filterwarnings("ignore",
+                        r'complex divmod\(\), // and % are deprecated',
+                        DeprecationWarning)
+try:
+    do_infix_binops()
+    do_prefix_binops()
+finally:
+    warnings.resetwarnings()

Lib/test/test_xmllib.py

@@ -16,7 +16,6 @@ testdoc = """\
 import warnings
 warnings.filterwarnings("ignore", ".* xmllib .* obsolete.*",
                         DeprecationWarning)
-del warnings
 
 import test_support
 import unittest
@@ -33,6 +32,7 @@ class XMLParserTestCase(unittest.TestCase):
 
 def test_main():
     test_support.run_unittest(XMLParserTestCase)
+    warnings.resetwarnings()
 
 
 if __name__ == "__main__":