def test_Ex(self):
        r = np.random.rand(self.M.nEx)
        P = self.M.getInterpolationMat(self.M.gridEx, 'Ex')
        assert np.abs(P[:,:self.M.nEx]*r % r).max() < TOL
dataset/ETHPy150Open simpeg/simpeg/tests/mesh/test_TreeMesh.py/Test3DInterpolation.test_Ex/operator `-` -> `%`