Update AbLang_bert_model.py

AbLang_bert_model.py

@@ -26,87 +26,9 @@ class BertEmbeddingsV2(BertEmbeddings):
     def create_position_ids_from_input_ids(self, input_ids: torch.LongTensor) -> torch.Tensor:
         mask = input_ids.ne(self.pad_token_id).int()
         return torch.cumsum(mask, dim=1).long() * mask
-    
-
-class BertModelV2(BertModel):
-    def __init__(self, config):
-        super().__init__(config)
-        self.embeddings = BertEmbeddingsV2(config)
 
 
-class BertForMaskedLMV2(BertForMaskedLM):
+class BertModelV2(BertModel):
     def __init__(self, config):
         super().__init__(config)
-
-    def forward(
-        self,
-        input_ids: Optional[torch.Tensor] = None,
-        attention_mask: Optional[torch.Tensor] = None,
-        token_type_ids: Optional[torch.Tensor] = None,
-        position_ids: Optional[torch.Tensor] = None,
-        head_mask: Optional[torch.Tensor] = None,
-        inputs_embeds: Optional[torch.Tensor] = None,
-        encoder_hidden_states: Optional[torch.Tensor] = None,
-        encoder_attention_mask: Optional[torch.Tensor] = None,
-        labels: Optional[torch.Tensor] = None,
-        output_attentions: Optional[bool] = None,
-        output_hidden_states: Optional[bool] = None,
-        return_dict: Optional[bool] = None,
-    ) -> Union[Tuple[torch.Tensor], MaskedLMOutput]:
-        r"""
-        labels (`torch.LongTensor` of shape `(batch_size, sequence_length)`, *optional*):
-            Labels for computing the masked language modeling loss. Indices should be in `[-100, 0, ...,
-            config.vocab_size]` (see `input_ids` docstring) Tokens with indices set to `-100` are ignored (masked), the
-            loss is only computed for the tokens with labels in `[0, ..., config.vocab_size]`
-        """
-
-        return_dict = return_dict if return_dict is not None else self.config.use_return_dict
-
-        outputs = self.bert(
-            input_ids,
-            attention_mask=attention_mask,
-            token_type_ids=token_type_ids,
-            position_ids=position_ids,
-            head_mask=head_mask,
-            inputs_embeds=inputs_embeds,
-            encoder_hidden_states=encoder_hidden_states,
-            encoder_attention_mask=encoder_attention_mask,
-            output_attentions=output_attentions,
-            output_hidden_states=output_hidden_states,
-            return_dict=return_dict,
-        )
-
-        sequence_output = outputs[0]
-        prediction_scores = sequence_output[:, :, 0:24]
-        
-        masked_lm_loss = None
-        if labels is not None:
-            loss_fct = torch.nn.CrossEntropyLoss()  # -100 index = padding token
-            masked_lm_loss = loss_fct(prediction_scores.view(-1, self.config.vocab_size), labels.view(-1))
-
-        if not return_dict:
-            output = (prediction_scores,) + outputs[2:]
-            return ((masked_lm_loss,) + output) if masked_lm_loss is not None else output
-
-        return MaskedLMOutput(
-            loss=masked_lm_loss,
-            logits=prediction_scores,
-            hidden_states=outputs.hidden_states,
-            attentions=outputs.attentions,
-        )
-
-    def prepare_inputs_for_generation(self, input_ids, attention_mask=None, **model_kwargs):
-        input_shape = input_ids.shape
-        effective_batch_size = input_shape[0]
-
-        #  add a dummy token
-        if self.config.pad_token_id is None:
-            raise ValueError("The PAD token should be defined for generation")
-
-        attention_mask = torch.cat([attention_mask, attention_mask.new_zeros((attention_mask.shape[0], 1))], dim=-1)
-        dummy_token = torch.full(
-            (effective_batch_size, 1), self.config.pad_token_id, dtype=torch.long, device=input_ids.device
-        )
-        input_ids = torch.cat([input_ids, dummy_token], dim=1)
-
-        return {"input_ids": input_ids, "attention_mask": attention_mask}
+        self.embeddings = BertEmbeddingsV2(config)