Not An issue- Adding metadata

[pythonometrist]

Hello again - I was wondering if you might have pointers on how to nincorporate metadata with the text. I think I am good with adding a custom layer on top of bert. I think I need to to figure out how to generate each example so a part of it goes to bert and the rest to the other layers on top of bert. Any ideas? Thanks as always.

[pythonometrist]

Basically, I could for example add rating (as a continuous measure) as metadata. Then 0-3 refer to the batch inputs for bert, and the next one could be rating. The problem is in the forward method how do i split out the in out into the first four elements for BERT and the next one for the additional regression layer.

[ThilinaRajapakse]

How about the approach here (ExtraBertMultiClassifier)?

class ExtraBertMultiClassifier(nn.Module):
    def __init__(self, bert_model_path, labels_count, hidden_dim=768, mlp_dim=100, extras_dim=6, dropout=0.1):
        super().__init__()

        self.config = {
            'bert_model_path': bert_model_path,
            'labels_count': labels_count,
            'hidden_dim': hidden_dim,
            'mlp_dim': mlp_dim,
            'extras_dim': extras_dim,
            'dropout': dropout,
        }

        self.bert = BertModel.from_pretrained(bert_model_path)
        self.dropout = nn.Dropout(dropout)
        self.mlp = nn.Sequential(
            nn.Linear(hidden_dim + extras_dim, mlp_dim),
            nn.ReLU(),
            nn.Linear(mlp_dim, mlp_dim),
            # nn.ReLU(),
            # nn.Linear(mlp_dim, mlp_dim),
            nn.ReLU(),            
            nn.Linear(mlp_dim, labels_count)
        )
        # self.sigmoid = nn.Sigmoid()
        self.softmax = nn.Softmax()

    def forward(self, tokens, masks, extras):
        _, pooled_output = self.bert(tokens, attention_mask=masks, output_all_encoded_layers=False)
        dropout_output = self.dropout(pooled_output)

        concat_output = torch.cat((dropout_output, extras), dim=1)
        mlp_output = self.mlp(concat_output)
        # proba = self.sigmoid(mlp_output)
        proba = self.softmax(mlp_output)

        return proba

It's from this paper.

[pythonometrist]

Thanks ! let me check it out.