python append不适用于2d数组中的axis=1。

import numpy as np 
    TwoDArray = np.array([[11, 15, 10, 6], 
                          [10, 14, 11, 5],
                          [12, 17, 12, 8],
                          [15, 18, 14, 9]])
    print(TwoDArray)
    new2d = np.append(TwoDArray, [[1,2,3,4]], axis=1) #this line of code has the problem
    print(new2d)