test_regression.py 文件源码

def test_frompyfunc_nout_0(self):
        # gh-2014

        def f(x):
            x[0], x[-1] = x[-1], x[0]

        uf = np.frompyfunc(f, 1, 0)
        a = np.array([[1, 2, 3], [4, 5], [6, 7, 8, 9]])
        assert_equal(uf(a), ())
        assert_array_equal(a, [[3, 2, 1], [5, 4], [9, 7, 8, 6]])