def _compare_kerning_values(self, left, right):

        _, (vals1, vals2) = left
        left_diff = sum(abs(v1 - v2) for v1, v2 in zip(vals1, vals2))
        _, (vals1, vals2) = right
        right_diff = sum(abs(v1 - v2) for v1, v2 in zip(vals1, vals2))
        return right_diff - left_diff
Compare differences between kerning values, larger diffs first.
dataset/ETHPy150Open googlei18n/nototools/nototools/gpos_diff.py/GposDiffFinder._compare_kerning_values