def test_iterable(self):
    view = LabelSetView(['A', 'B', 'C'])
    self.assertSetEqual(set(view), {'A', 'B', 'C'})
def test_iterable(self):
    view = LabelSetView(['A', 'B', 'C'])
    self.assertSetEqual(set(view), {'A', 'B', 'C'})