torchvision dependency

[runxiao]

I follow the document to install VL-BERT, then run scripts
'./scripts/dist_run_single.sh 4 vcr/train_end2end.py ./cfgs/vcr/base_q2a_4x16G_fp32.yaml ./'
Got this error:

[jackroos]

You may try to reinstall torchvision by:

pip uninstall torchvision; pip install torchvision==0.2.1

[jackroos]

@runxiao I think it is problems from installing torchvision. You could open an issue in torchvision github repo. Thanks!