AttributeError: 'float' object has no attribute 'data' on pytorch 0.4.1

[adriangrepo]

I get the following error at trainer.backward_step() on running the demo script:
File "attn2d/nmt/trainer.py", line 230, in backward_step
self.clip_norm).data.item()
AttributeError: 'float' object has no attribute 'data'

which I fixed by:
grad_norm = torch.nn.utils.clip_grad_norm_(self.model.parameters(), self.clip_norm)

Which then runs OK for torch==0.4.1

Which version of pytorch was the code written for?

[elbayadm]

The code is written for PyTorch 0.4.0.
Your fix works fine for 0.4.0 as well.
Thanks.