如何从npy文件中创建和加载一个3维numpy.ndarray读数？

import numpy as np

# 创建一个3维数组，形状为(2, 3, 4)
arr = np.array([[[1, 2, 3, 4],
                 [5, 6, 7, 8],
                 [9, 10, 11, 12]],
                [[13, 14, 15, 16],
                 [17, 18, 19, 20],
                 [21, 22, 23, 24]]])

# 将数组保存到npy文件
np.save('array.npy', arr)

# 从npy文件加载数组
loaded_arr = np.load('array.npy')
print(loaded_arr)

[[[ 1  2  3  4]
  [ 5  6  7  8]
  [ 9 10 11 12]]

 [[13 14 15 16]
  [17 18 19 20]
  [21 22 23 24]]]