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 lock_temp(self, key):
    self.lock(key)
    try:
      yield
    finally:
      self.unlock(key)