机器学习笔记之list, numpy.array, torch.Tensor 格式相互转化

阅读目录

• 0x00 list 转 numpy
• 0x01 numpy 转 list
• 0x02 list 转 torch.Tensor
• 0x03 torch.Tensor 转 list
• 0x04 torch.Tensor 转 numpy
• 0x05 numpy 转 torch.Tensor

0x00 list 转 numpy

ndarray = np.array(list)

 

0x01 numpy 转 list

list = ndarray.tolist()

 

0x02 list 转 torch.Tensor

tensor=torch.Tensor(list)

 

0x03 torch.Tensor 转 list

先转numpy，后转list

list = tensor.numpy().tolist()

 

0x04 torch.Tensor 转 numpy

ndarray = tensor.numpy()

*gpu上的tensor不能直接转为numpy

ndarray = tensor.cpu().numpy()

 

0x05 numpy 转 torch.Tensor

tensor = torch.from_numpy(ndarray)