python-使用numpy扁平化列表数据

>>> import numpy as np
>>> np.array([[1,2,3],[4,5,6]]).flatten()
array([1, 2, 3, 4, 5, 6])
>>> np.array([[1,2,3],[4,5,6]]).flatten().tolist()
[1, 2, 3, 4, 5, 6]