---恢复内容开始--- Numpy_pratice In [2]: n = 10 L = [i for i in range(n)] In [3]: L * 2 Out[3]: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9] In [4]: import numpy as np X = np.arange(1,16).reshape(3,5) X Out[4]: array([[ 1, 2, 3, 4, 5], [ 6,