将NumPy数组连接到另一个NumPy数组

In [1]: import numpy as npIn [2]: a = np.array([[1, 2, 3], [4, 5, 6]])In [3]: b = np.array([[9, 8, 7], [6, 5, 4]])In [4]: np.concatenate((a, b))Out[4]: array([[1, 2, 3],       [4, 5, 6],       [9, 8, 7],       [6, 5, 4]])

或这个：

In [1]: a = np.array([1, 2, 3])In [2]: b = np.array([4, 5, 6])In [3]: np.vstack((a, b))Out[3]: array([[1, 2, 3],       [4, 5, 6]])