Issue #7449, last part (11): fix many tests if thread support is disabled
* Use try/except ImportError or test_support.import_module() to import thread
and threading modules
* Add @unittest.skipUnless(threading, ...) to testcases using threads
diff --git a/Lib/test/test_threadsignals.py b/Lib/test/test_threadsignals.py
index b28705f..127ddd2 100644
--- a/Lib/test/test_threadsignals.py
+++ b/Lib/test/test_threadsignals.py
@@ -1,11 +1,11 @@
"""PyUnit testing that threads honor our signal semantics"""
import unittest
-import thread
import signal
import os
import sys
-from test.test_support import run_unittest
+from test.test_support import run_unittest, import_module
+thread = import_module('thread')
if sys.platform[:3] in ('win', 'os2') or sys.platform=='riscos':
raise unittest.SkipTest, "Can't test signal on %s" % sys.platform