In [23]: M = arange(9).reshape(3, 3) In [24]: M Out[24]: array([[0, 1, 2], [3, 4, 5], [6, 7, 8]]) In [25]: c_[M, [7, 7, 7]] Out[25]: array([[0, 1, 2, 7], [3, 4, 5, 7], [6, 7, 8, 7]]) In [27]: r_[M, [[7, 7, 7]]] Out[27]: array([[0, 1, 2], […