def test_invalid_scalar_index(adata, index):
    # https://github.com/theislab/anndata/issues/619
    with pytest.raises(IndexError, match=r".*index.* out of range\."):
        _ = adata[index]
def __init__(self):
        super().__init__('confusion_matrix.yaml')

        self._matrix = [[]]
        self._categories = []
        self._initialized = True