How can I get the confidence score for the classification task
In evaluation step, it seems it only shows the predicted label for the data instance.
How can I get the confidence score for each class?
You can use `torch.nn.functional.softmax` on the `logits` that the model outputs here:

https://github.com/huggingface/pytorch-pretrained-BERT/blob/0a9d7c7edb20a3e82cfbb4b72515575543784823/examples/run_classifier.py#L589-L591

It will give you the confidence score for each class.