def test_keys(self):
     ta = (1, 2, 3)
     l = zip(ta, ta)
     dl = IntDisplayList(l)
     self.assertTrue(tuple(dl.keys()) == ta)
 def test_keys(self):
     ta = (1, 2, 3)
     l = zip(ta, ta)
     dl = IntDisplayList(l)
     self.assertTrue(tuple(dl.keys()) == ta)