Terry J. Reedy added the comment:
Using findleak.py, attached to #30642, modified to always print the filename, I
discovered that test_parenmatch also flashes (along with test_searchbase). The
leak test runs each test_xyz module 9 times, so is a good way to see flashing.
Adding 'root.withdraw' stops the single flash when running test_parenmatch
once. However, it does not stop flashing when running 9 times with -R: refleak
test. Flash continues even if class is reduced to
class ParenMatchTest(unittest.TestCase):
@classmethod
def setUpClass(cls):
cls.root = Tk()
cls.root.withdraw()
@classmethod
def tearDownClass(cls):
cls.root.destroy()
del cls.root
def test_dummy(self): pass
This is a puzzle since the same skeleton is in several other files. In fact,
at least one, test_autocomplete, does not even have root.withdraw. In any case,
I will add it here.
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versions: +Python 3.7 -Python 2.7, Python 3.5
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<http://bugs.python.org/issue27922>
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