def test_ImageDict_returns_true_if_key_exists(self): d = ImageDict() obj = cv2.imread(path.join(_this_path, 'data', 'object.png')) mask = cv2.imread(path.join(_this_path, 'data', 'object_mask.png')) d[obj, mask] = 1 self.assertTrue(d.__contains__((obj, mask))) self.assertTrue((obj, mask) in d) self.assertTrue(d.has_key((obj, mask)))