I save a tensor using torch.save(Tensor, A.pth) and load it in my dataloader process via T = torch.load("A.pth")
Then i cahnge the tensor to numpy via T_Numpy =T.data.cpu().numpy(),
Why am I getting the following error:
    "Cannot re-initialize CUDA in forked subprocess. " + msg)
RuntimeError: Cannot re-initialize CUDA in forked subprocess. To use CUDA with multiprocessing, you must use the 'spawn' start method

How I can fix it? 
P.S. I am using Dataparallel and im in pytorch 0.3.0