[转载]tensor、numpy.array、list三者之间互相转换
ValueError:only one element tensors can be converted to Python scalars问题解答
1.1 list 转 numpy
ndarray = np.array(list)
1.2 numpy 转 list
list = ndarray.tolist()
2.1 list 转 torch.Tensor
tensor=torch.Tensor(list)
2.2 torch.Tensor 转 list
先转numpy，后转list
list = tensor.numpy().tolist()
3.1 torch.Tensor 转 numpy
ndarray = tensor.numpy()
*gpu上的tensor不能直接转为numpy
ndarray = tensor.cpu().numpy()
3.2 numpy 转 torch.Tensor
tensor = torch.from_numpy(ndarray)
