No module named 'pytorch_pretrained_bert'

[Wenjin Deng]

When I run:

python data/data.py -dataset KITMocap -path2data ../dataset/kit-mocap

Error:
No module named 'pytorch_pretrained_bert'

The reason is the lack of file "pytorch_pretrained_bert" in folder "nlp".

[Wenjin Deng]

It can be solved by pip install.