Pyorch之numpy与torch之间相互转换方式

import numpy as np
import torch
 
np_arr = np.array([1,2,3,4])
tor_arr=torch.from_numpy(np_arr)
tor2numpy=tor_arr.numpy()
print('\nnumpy\n',np_arr,'\ntorch\n',tor_arr,'\nnumpy\n',tor2numpy)

numpy
 [1 2 3 4] 
torch
 tensor([1, 2, 3, 4], dtype=torch.int32) 
numpy
 [1 2 3 4]