missing 1 required positional argument: 'num_classes' in 'from_pretrained'

[desireevl]

I am running a multiclass BERT classification model and am receiving the following error:

Traceback (most recent call last): File "train_bert_multi_label.py", line 144, in <module> main() File "train_bert_multi_label.py", line 78, in main num_classes = len(id2label)) File "/opt/miniconda3/envs/tempenv/lib/python3.6/site-packages/pytorch_transformers/modeling_utils.py", line 403, in from_pretrained model = cls(config) TypeError: __init__() missing 1 required positional argument: 'num_classes'

The script worked fine when using pytorch-pretrained-bert and am guessing there is an issue from the new release.

Thanks for the great tools :)

[thomwolf]

Yes, @xanlsh is working on an update to reduce the effect of this breaking change in #866.

You should be able to keep your script unchanged.

[anlsh]

@desireevl Since #866 has been merged, your code should work now

[desireevl]

Thanks!