In[1]: x = np.array([1, 2, 3])
       grid = np.array([[9, 8, 7],
                         [6, 5, 4]])
       # 垂直栈数组
       np.vstack([x, grid])
Out[1]: array([[1, 2, 3],
                [9, 8, 7],
                [6, 5, 4]])
In[2]: # 水平栈数组
       y = np.array([[99],
                      [99]])
       np.hstack([grid, y])
Out[2]: array([[ 9,  8,  7, 99],
                [ 6,  5,  4, 99]])