AttributeError: 'LambdaLR' object has no attribute 'get_last_lr'

[wasiahmad]

I am trying to run the summarization example using BART and getting the following error.

tqdm_dict = {"loss": "{:.3f}".format(avg_loss), "lr": self.lr_scheduler.get_last_lr()[-1]}
AttributeError: 'LambdaLR' object has no attribute 'get_last_lr'

The error occurred at this line. I am using PyTorch 1.3.

[944721805]

I encountered the same problem, have you solved it？

[stefan-it]

Upgrading to PyTorch 1.4 would solve that issue :)

Current master branch recommends that:

transformers/setup.py

Line 70 in 4e817ff

extras["torch"] = ["torch==1.4.0"]

[944721805]

Thank you so much, I have solved it.

[youkaichao]

get_last_lr is introduced in pytorch 1.4.0 . Maybe you need to upgrade your pytorch.

[julien-c]

If you really are stuck with PyTorch <= 1.3 please feel free to open a PR to fix this with backward compatibility

[bing0037]

I upgraded pytorch to v1.5.0, but run_glue.py with Bert model failed. So, you may have to set it to 1.4.0