test_regression.py 文件源码

def test_svd_no_uv(self):
        # gh-4733
        for shape in (3, 4), (4, 4), (4, 3):
            for t in float, complex:
                a = np.ones(shape, dtype=t)
                w = linalg.svd(a, compute_uv=False)
                c = np.count_nonzero(np.absolute(w) > 0.5)
                assert_equal(c, 1)
                assert_equal(np.linalg.matrix_rank(a), 1)
                assert_array_less(1, np.linalg.norm(a, ord=2))