def _jaccard(a_rows, a_cols, b_rows, b_cols):
    """Jaccard coefficient on the elements of the two biclusters."""
    intersection = ((a_rows * b_rows).sum() *
                    (a_cols * b_cols).sum())

    a_size = a_rows.sum() * a_cols.sum()
    b_size = b_rows.sum() * b_cols.sum()

    return intersection / (a_size + intersection - b_size)
dataset/ETHPy150Open scikit-learn/scikit-learn/sklearn/metrics/cluster/bicluster.py/_jaccard/swapped operands of `-`