test_multiarray.py 文件源码

def test_object_argmax_with_NULLs(self):
        # See gh-6032
        a = np.empty(4, dtype='O')
        ctypes.memset(a.ctypes.data, 0, a.nbytes)
        assert_equal(a.argmax(), 0)
        a[3] = 10
        assert_equal(a.argmax(), 3)
        a[1] = 30
        assert_equal(a.argmax(), 1)