import math import os import random import warnings from dataclasses import dataclass from typing import Optional, Tuple import torch import torch.nn.functional as F import torch.utils.checkpoint import transformers from torch import Tensor, device, dtype, nn from torch.nn import CrossEntropyLoss, MSELoss from transformers.activations import ACT2FN from transformers.file_utils import (ModelOutput, add_code_sample_docstrings, add_start_docstrings, add_start_docstrings_to_model_forward, replace_return_docstrings) from transformers.modeling_outputs import ( BaseModelOutputWithPastAndCrossAttentions, BaseModelOutputWithPoolingAndCrossAttentions, CausalLMOutputWithCrossAttentions, MaskedLMOutput, MultipleChoiceModelOutput, NextSentencePredictorOutput, QuestionAnsweringModelOutput, SequenceClassifierOutput, TokenClassifierOutput) from transformers.modeling_utils import PreTrainedModel from transformers.models.bert.configuration_bert import BertConfig from transformers.utils import logging from modelscope.metainfo import Models from modelscope.models import Model, TorchModel from modelscope.models.builder import MODELS from modelscope.outputs import AttentionBackboneModelOutput from modelscope.utils.constant import Tasks from modelscope.utils.nlp.utils import parse_labels_in_order from modelscope.utils.torch_utils import (apply_chunking_to_forward, find_pruneable_heads_and_indices, prune_linear_layer) transformers.logging.set_verbosity_error() logger = logging.get_logger() _CONFIG_FOR_DOC = 'BertConfig' _TOKENIZER_FOR_DOC = 'BertTokenizer' def load_tf_weights_in_bert(model, config, tf_checkpoint_path): """Load tf checkpoints in a pytorch model.""" try: import re import numpy as np import tensorflow as tf except ImportError: logger.error( 'Loading a TensorFlow model in PyTorch, requires TensorFlow to be installed. Please see ' 'https://www.tensorflow.org/install/ for installation instructions.' ) raise tf_path = os.path.abspath(tf_checkpoint_path) logger.info('Converting TensorFlow checkpoint from {}'.format(tf_path)) # Load weights from TF model init_vars = tf.train.list_variables(tf_path) names = [] arrays = [] for name, shape in init_vars: logger.info('Loading TF weight {} with shape {}'.format(name, shape)) array = tf.train.load_variable(tf_path, name) names.append(name) arrays.append(array) for name, array in zip(names, arrays): name = name.split('/') # adam_v and adam_m are variables used in AdamWeightDecayOptimizer to # calculated m and v which are not required for using pretrained model if any(n in [ 'adam_v', 'adam_m', 'AdamWeightDecayOptimizer', 'AdamWeightDecayOptimizer_1', 'global_step' ] for n in name): logger.info('Skipping {}'.format('/'.join(name))) continue pointer = model for m_name in name: if re.fullmatch(r'[A-Za-z]+_\d+', m_name): scope_names = re.split(r'_(\d+)', m_name) else: scope_names = [m_name] if scope_names[0] == 'kernel' or scope_names[0] == 'gamma': pointer = getattr(pointer, 'weight') elif scope_names[0] == 'output_bias' or scope_names[0] == 'beta': pointer = getattr(pointer, 'bias') elif scope_names[0] == 'output_weights': pointer = getattr(pointer, 'weight') elif scope_names[0] == 'squad': pointer = getattr(pointer, 'classifier') else: try: pointer = getattr(pointer, scope_names[0]) except AttributeError: logger.info('Skipping {}'.format('/'.join(name))) continue if len(scope_names) >= 2: num = int(scope_names[1]) pointer = pointer[num] if m_name[-11:] == '_embeddings': pointer = getattr(pointer, 'weight') elif m_name == 'kernel': array = np.transpose(array) try: assert ( pointer.shape == array.shape ), f'Pointer shape {pointer.shape} and array shape {array.shape} mismatched' except AssertionError as e: e.args += (pointer.shape, array.shape) raise logger.info('Initialize PyTorch weight {}'.format(name)) pointer.data = torch.from_numpy(array) return model class GisEmbeddings(nn.Module): """Construct the embeddings from word, position and token_type embeddings.""" def __init__(self, config): super().__init__() self.word_embeddings = nn.Embedding( config.vocab_size, config.hidden_size, padding_idx=0) self.position_embeddings = nn.Embedding(config.max_position_embeddings, config.hidden_size) self.token_type_embeddings = nn.Embedding( config.type_vocab_size, config.hidden_size, padding_idx=0) self.rel_type_embeddings = nn.Embedding( config.rel_type_vocab_size, config.hidden_size, padding_idx=0) self.absolute_x_embeddings = nn.Embedding( config.absolute_x_vocab_size, config.hidden_size, padding_idx=0) self.absolute_y_embeddings = nn.Embedding( config.absolute_y_vocab_size, config.hidden_size, padding_idx=0) self.relative_x_embeddings = nn.Embedding( config.relative_x_vocab_size, config.hidden_size, padding_idx=0) self.relative_y_embeddings = nn.Embedding( config.relative_y_vocab_size, config.hidden_size, padding_idx=0) if hasattr(config, 'prov_vocab_size'): self.prov_embeddings = nn.Embedding( config.prov_vocab_size, config.hidden_size, padding_idx=0) self.city_embeddings = nn.Embedding( config.city_vocab_size, config.hidden_size, padding_idx=0) self.dist_embeddings = nn.Embedding( config.dist_vocab_size, config.hidden_size, padding_idx=0) # self.LayerNorm is not snake-cased to stick with TensorFlow model variable name and be able to load # any TensorFlow checkpoint file self.LayerNorm = nn.LayerNorm( config.hidden_size, eps=config.layer_norm_eps) self.dropout = nn.Dropout(config.hidden_dropout_prob) # position_ids (1, len position emb) is contiguous in memory and exported when serialized self.register_buffer( 'position_ids', torch.arange(config.max_position_embeddings).expand((1, -1))) self.position_embedding_type = getattr(config, 'position_embedding_type', 'absolute') self.config = config def forward(self, input_ids=None, token_type_ids=None, position_ids=None, inputs_embeds=None, past_key_values_length=0, rel_type_ids=None, absolute_position_ids=None, relative_position_ids=None, prov_ids=None, city_ids=None, dist_ids=None): if input_ids is not None: input_shape = input_ids.size() else: input_shape = inputs_embeds.size()[:-1] seq_length = input_shape[1] if position_ids is None: position_ids = self.position_ids[:, past_key_values_length:seq_length + past_key_values_length] if token_type_ids is None: token_type_ids = torch.zeros( input_shape, dtype=torch.long, device=self.position_ids.device) if inputs_embeds is None: inputs_embeds = self.word_embeddings(input_ids) token_type_embeddings = self.token_type_embeddings(token_type_ids) embeddings = inputs_embeds + token_type_embeddings if self.position_embedding_type == 'absolute': position_embeddings = self.position_embeddings(position_ids) embeddings += position_embeddings embeddings += self.rel_type_embeddings(rel_type_ids) embeddings += self.absolute_x_embeddings(absolute_position_ids[:, :, 0]) embeddings += self.absolute_y_embeddings(absolute_position_ids[:, :, 1]) embeddings += self.absolute_x_embeddings(absolute_position_ids[:, :, 2]) embeddings += self.absolute_y_embeddings(absolute_position_ids[:, :, 3]) embeddings += self.relative_x_embeddings(relative_position_ids[:, :, 0]) embeddings += self.relative_y_embeddings(relative_position_ids[:, :, 1]) embeddings += self.relative_x_embeddings(relative_position_ids[:, :, 2]) embeddings += self.relative_y_embeddings(relative_position_ids[:, :, 3]) if prov_ids is not None: embeddings += self.prov_embeddings(prov_ids) embeddings += self.city_embeddings(city_ids) embeddings += self.dist_embeddings(dist_ids) embeddings = self.LayerNorm(embeddings) embeddings = self.dropout(embeddings) return embeddings class BertEmbeddings(nn.Module): """Construct the embeddings from word, position and token_type embeddings.""" def __init__(self, config): super().__init__() self.word_embeddings = nn.Embedding( config.vocab_size, config.hidden_size, padding_idx=config.pad_token_id) self.position_embeddings = nn.Embedding(config.max_position_embeddings, config.hidden_size) self.token_type_embeddings = nn.Embedding(config.type_vocab_size, config.hidden_size) # self.LayerNorm is not snake-cased to stick with TensorFlow model variable name and be able to load # any TensorFlow checkpoint file self.LayerNorm = nn.LayerNorm( config.hidden_size, eps=config.layer_norm_eps) self.dropout = nn.Dropout(config.hidden_dropout_prob) # position_ids (1, len position emb) is contiguous in memory and exported when serialized self.register_buffer( 'position_ids', torch.arange(config.max_position_embeddings).expand((1, -1))) self.position_embedding_type = getattr(config, 'position_embedding_type', 'absolute') self.config = config def forward(self, input_ids=None, token_type_ids=None, position_ids=None, inputs_embeds=None, past_key_values_length=0, rel_type_ids=None, absolute_position_ids=None, relative_position_ids=None): if input_ids is not None: input_shape = input_ids.size() else: input_shape = inputs_embeds.size()[:-1] seq_length = input_shape[1] if position_ids is None: position_ids = self.position_ids[:, past_key_values_length:seq_length + past_key_values_length] if token_type_ids is None: token_type_ids = torch.zeros( input_shape, dtype=torch.long, device=self.position_ids.device) if inputs_embeds is None: inputs_embeds = self.word_embeddings(input_ids) token_type_embeddings = self.token_type_embeddings(token_type_ids) embeddings = inputs_embeds + token_type_embeddings if self.position_embedding_type == 'absolute': position_embeddings = self.position_embeddings(position_ids) embeddings += position_embeddings embeddings = self.LayerNorm(embeddings) embeddings = self.dropout(embeddings) return embeddings class BertSelfAttention(nn.Module): def __init__(self, config, is_cross_attention): super().__init__() self.config = config if config.hidden_size % config.num_attention_heads != 0 and not hasattr( config, 'embedding_size'): raise ValueError( 'The hidden size (%d) is not a multiple of the number of attention ' 'heads (%d)' % (config.hidden_size, config.num_attention_heads)) self.num_attention_heads = config.num_attention_heads self.attention_head_size = int(config.hidden_size / config.num_attention_heads) self.all_head_size = self.num_attention_heads * self.attention_head_size self.query = nn.Linear(config.hidden_size, self.all_head_size) if is_cross_attention: self.key = nn.Linear(config.encoder_width, self.all_head_size) self.value = nn.Linear(config.encoder_width, self.all_head_size) else: self.key = nn.Linear(config.hidden_size, self.all_head_size) self.value = nn.Linear(config.hidden_size, self.all_head_size) self.dropout = nn.Dropout(config.attention_probs_dropout_prob) self.position_embedding_type = getattr(config, 'position_embedding_type', 'absolute') if self.position_embedding_type == 'relative_key' or self.position_embedding_type == 'relative_key_query': self.max_position_embeddings = config.max_position_embeddings self.distance_embedding = nn.Embedding( 2 * config.max_position_embeddings - 1, self.attention_head_size) self.save_attention = False def save_attn_gradients(self, attn_gradients): self.attn_gradients = attn_gradients def get_attn_gradients(self): return self.attn_gradients def save_attention_map(self, attention_map): self.attention_map = attention_map def get_attention_map(self): return self.attention_map def transpose_for_scores(self, x): new_x_shape = x.size()[:-1] + (self.num_attention_heads, self.attention_head_size) x = x.view(*new_x_shape) return x.permute(0, 2, 1, 3) def forward( self, hidden_states, attention_mask=None, head_mask=None, encoder_hidden_states=None, encoder_attention_mask=None, past_key_value=None, output_attentions=False, ): mixed_query_layer = self.query(hidden_states) # If this is instantiated as a cross-attention module, the keys # and values come from an encoder; the attention mask needs to be # such that the encoder's padding tokens are not attended to. is_cross_attention = encoder_hidden_states is not None if is_cross_attention: key_layer = self.transpose_for_scores( self.key(encoder_hidden_states)) value_layer = self.transpose_for_scores( self.value(encoder_hidden_states)) attention_mask = encoder_attention_mask elif past_key_value is not None: key_layer = self.transpose_for_scores(self.key(hidden_states)) value_layer = self.transpose_for_scores(self.value(hidden_states)) key_layer = torch.cat([past_key_value[0], key_layer], dim=2) value_layer = torch.cat([past_key_value[1], value_layer], dim=2) else: key_layer = self.transpose_for_scores(self.key(hidden_states)) value_layer = self.transpose_for_scores(self.value(hidden_states)) query_layer = self.transpose_for_scores(mixed_query_layer) past_key_value = (key_layer, value_layer) # Take the dot product between "query" and "key" to get the raw attention scores. attention_scores = torch.matmul(query_layer, key_layer.transpose(-1, -2)) if self.position_embedding_type == 'relative_key' or self.position_embedding_type == 'relative_key_query': seq_length = hidden_states.size()[1] position_ids_l = torch.arange( seq_length, dtype=torch.long, device=hidden_states.device).view(-1, 1) position_ids_r = torch.arange( seq_length, dtype=torch.long, device=hidden_states.device).view(1, -1) distance = position_ids_l - position_ids_r positional_embedding = self.distance_embedding( distance + self.max_position_embeddings - 1) positional_embedding = positional_embedding.to( dtype=query_layer.dtype) # fp16 compatibility if self.position_embedding_type == 'relative_key': relative_position_scores = torch.einsum( 'bhld,lrd->bhlr', query_layer, positional_embedding) attention_scores = attention_scores + relative_position_scores elif self.position_embedding_type == 'relative_key_query': relative_position_scores_query = torch.einsum( 'bhld,lrd->bhlr', query_layer, positional_embedding) relative_position_scores_key = torch.einsum( 'bhrd,lrd->bhlr', key_layer, positional_embedding) attention_scores = attention_scores + relative_position_scores_query + relative_position_scores_key attention_scores = attention_scores / math.sqrt( self.attention_head_size) if attention_mask is not None: # Apply the attention mask is (precomputed for all layers in BertModel forward() function) attention_scores = attention_scores + attention_mask # Normalize the attention scores to probabilities. attention_probs = nn.Softmax(dim=-1)(attention_scores) if is_cross_attention and self.save_attention: self.save_attention_map(attention_probs) attention_probs.register_hook(self.save_attn_gradients) # This is actually dropping out entire tokens to attend to, which might # seem a bit unusual, but is taken from the original Transformer paper. attention_probs_dropped = self.dropout(attention_probs) # Mask heads if we want to if head_mask is not None: attention_probs_dropped = attention_probs_dropped * head_mask context_layer = torch.matmul(attention_probs_dropped, value_layer) context_layer = context_layer.permute(0, 2, 1, 3).contiguous() new_context_layer_shape = context_layer.size()[:-2] + ( self.all_head_size, ) context_layer = context_layer.view(*new_context_layer_shape) outputs = (context_layer, attention_probs) if output_attentions else (context_layer, ) outputs = outputs + (past_key_value, ) return outputs class BertSelfOutput(nn.Module): def __init__(self, config): super().__init__() self.dense = nn.Linear(config.hidden_size, config.hidden_size) self.LayerNorm = nn.LayerNorm( config.hidden_size, eps=config.layer_norm_eps) self.dropout = nn.Dropout(config.hidden_dropout_prob) def forward(self, hidden_states, input_tensor): hidden_states = self.dense(hidden_states) hidden_states = self.dropout(hidden_states) hidden_states = self.LayerNorm(hidden_states + input_tensor) return hidden_states class BertAttention(nn.Module): def __init__(self, config, is_cross_attention=False): super().__init__() self.self = BertSelfAttention(config, is_cross_attention) self.output = BertSelfOutput(config) self.pruned_heads = set() def prune_heads(self, heads): if len(heads) == 0: return heads, index = find_pruneable_heads_and_indices( heads, self.self.num_attention_heads, self.self.attention_head_size, self.pruned_heads) # Prune linear layers self.self.query = prune_linear_layer(self.self.query, index) self.self.key = prune_linear_layer(self.self.key, index) self.self.value = prune_linear_layer(self.self.value, index) self.output.dense = prune_linear_layer(self.output.dense, index, dim=1) # Update hyper params and store pruned heads self.self.num_attention_heads = self.self.num_attention_heads - len( heads) self.self.all_head_size = self.self.attention_head_size * self.self.num_attention_heads self.pruned_heads = self.pruned_heads.union(heads) def forward( self, hidden_states, attention_mask=None, head_mask=None, encoder_hidden_states=None, encoder_attention_mask=None, past_key_value=None, output_attentions=False, ): self_outputs = self.self( hidden_states, attention_mask, head_mask, encoder_hidden_states, encoder_attention_mask, past_key_value, output_attentions, ) attention_output = self.output(self_outputs[0], hidden_states) outputs = (attention_output, ) + self_outputs[1:] # add attentions if we output them return outputs class BertIntermediate(nn.Module): def __init__(self, config): super().__init__() self.dense = nn.Linear(config.hidden_size, config.intermediate_size) if isinstance(config.hidden_act, str): self.intermediate_act_fn = ACT2FN[config.hidden_act] else: self.intermediate_act_fn = config.hidden_act def forward(self, hidden_states): hidden_states = self.dense(hidden_states) hidden_states = self.intermediate_act_fn(hidden_states) return hidden_states class BertOutput(nn.Module): def __init__(self, config): super().__init__() self.dense = nn.Linear(config.intermediate_size, config.hidden_size) self.LayerNorm = nn.LayerNorm( config.hidden_size, eps=config.layer_norm_eps) self.dropout = nn.Dropout(config.hidden_dropout_prob) def forward(self, hidden_states, input_tensor): hidden_states = self.dense(hidden_states) hidden_states = self.dropout(hidden_states) hidden_states = self.LayerNorm(hidden_states + input_tensor) return hidden_states class BertLayer(nn.Module): def __init__(self, config, layer_num): super().__init__() self.config = config self.chunk_size_feed_forward = config.chunk_size_feed_forward self.seq_len_dim = 1 self.attention = BertAttention(config) self.has_cross_attention = (layer_num >= config.fusion_layer) if self.has_cross_attention: self.layer_num = layer_num self.crossattention = BertAttention( config, is_cross_attention=True) self.intermediate = BertIntermediate(config) self.output = BertOutput(config) def forward( self, hidden_states, attention_mask=None, head_mask=None, encoder_hidden_states=None, encoder_attention_mask=None, past_key_value=None, output_attentions=False, ): # decoder uni-directional self-attention cached key/values tuple is at # positions 1,2 self_attn_past_key_value = past_key_value[: 2] if past_key_value is not None else None self_attention_outputs = self.attention( hidden_states, attention_mask, head_mask, output_attentions=output_attentions, past_key_value=self_attn_past_key_value, ) attention_output = self_attention_outputs[0] outputs = self_attention_outputs[1:-1] present_key_value = self_attention_outputs[-1] if self.has_cross_attention: assert encoder_hidden_states is not None, 'encoder_hidden_states must be given for cross-attention layers' if type(encoder_hidden_states) == list: cross_attention_outputs = self.crossattention( attention_output, attention_mask, head_mask, encoder_hidden_states[(self.layer_num - self.config.fusion_layer) % len(encoder_hidden_states)], encoder_attention_mask[(self.layer_num - self.config.fusion_layer) % len(encoder_hidden_states)], output_attentions=output_attentions, ) attention_output = cross_attention_outputs[0] outputs = outputs + cross_attention_outputs[1:-1] else: cross_attention_outputs = self.crossattention( attention_output, attention_mask, head_mask, encoder_hidden_states, encoder_attention_mask, output_attentions=output_attentions, ) attention_output = cross_attention_outputs[0] outputs = outputs + cross_attention_outputs[ 1: -1] # add cross attentions if we output attention weights layer_output = apply_chunking_to_forward(self.feed_forward_chunk, self.chunk_size_feed_forward, self.seq_len_dim, attention_output) outputs = (layer_output, ) + outputs outputs = outputs + (present_key_value, ) return outputs def feed_forward_chunk(self, attention_output): intermediate_output = self.intermediate(attention_output) layer_output = self.output(intermediate_output, attention_output) return layer_output class BertEncoder(nn.Module): def __init__(self, config): super().__init__() self.config = config self.layer = nn.ModuleList( [BertLayer(config, i) for i in range(config.num_hidden_layers)]) def forward( self, hidden_states, attention_mask=None, head_mask=None, encoder_hidden_states=None, encoder_attention_mask=None, past_key_values=None, use_cache=None, output_attentions=False, output_hidden_states=False, return_dict=True, mode='multi_modal', ): all_hidden_states = () if output_hidden_states else None all_self_attentions = () if output_attentions else None all_cross_attentions = ( ) if output_attentions and self.config.add_cross_attention else None next_decoder_cache = () if use_cache else None if mode == 'text': start_layer = 0 output_layer = self.config.fusion_layer elif mode == 'query': start_layer = 0 output_layer = self.config.num_hidden_layers elif mode == 'fusion': start_layer = self.config.fusion_layer output_layer = self.config.num_hidden_layers elif mode == 'multi_modal': start_layer = 0 output_layer = self.config.num_hidden_layers for i in range(start_layer, output_layer): layer_module = self.layer[i] if output_hidden_states: all_hidden_states = all_hidden_states + (hidden_states, ) layer_head_mask = head_mask[i] if head_mask is not None else None past_key_value = past_key_values[ i] if past_key_values is not None else None if getattr(self.config, 'gradient_checkpointing', False) and self.training: if use_cache: logger.warn( '`use_cache=True` is incompatible with `config.gradient_checkpointing=True`. Setting ' '`use_cache=False`...') use_cache = False def create_custom_forward(module): def custom_forward(*inputs): return module(*inputs, past_key_value, output_attentions) return custom_forward layer_outputs = torch.utils.checkpoint.checkpoint( create_custom_forward(layer_module), hidden_states, attention_mask, layer_head_mask, encoder_hidden_states, encoder_attention_mask, ) else: layer_outputs = layer_module( hidden_states, attention_mask, layer_head_mask, encoder_hidden_states, encoder_attention_mask, past_key_value, output_attentions, ) hidden_states = layer_outputs[0] if use_cache: next_decoder_cache += (layer_outputs[-1], ) if output_attentions: all_self_attentions = all_self_attentions + ( layer_outputs[1], ) if output_hidden_states: all_hidden_states = all_hidden_states + (hidden_states, ) if not return_dict: return tuple(v for v in [ hidden_states, next_decoder_cache, all_hidden_states, all_self_attentions, all_cross_attentions, ] if v is not None) return BaseModelOutputWithPastAndCrossAttentions( last_hidden_state=hidden_states, past_key_values=next_decoder_cache, hidden_states=all_hidden_states, attentions=all_self_attentions, cross_attentions=all_cross_attentions, ) class BertPooler(nn.Module): def __init__(self, config): super().__init__() self.dense = nn.Linear(config.hidden_size, config.hidden_size) self.activation = nn.Tanh() def forward(self, hidden_states): # We "pool" the model by simply taking the hidden state corresponding # to the first token. first_token_tensor = hidden_states[:, 0] pooled_output = self.dense(first_token_tensor) pooled_output = self.activation(pooled_output) return pooled_output class BertPredictionHeadTransform(nn.Module): def __init__(self, config): super().__init__() self.dense = nn.Linear(config.hidden_size, config.hidden_size) if isinstance(config.hidden_act, str): self.transform_act_fn = ACT2FN[config.hidden_act] else: self.transform_act_fn = config.hidden_act self.LayerNorm = nn.LayerNorm( config.hidden_size, eps=config.layer_norm_eps) def forward(self, hidden_states): hidden_states = self.dense(hidden_states) hidden_states = self.transform_act_fn(hidden_states) hidden_states = self.LayerNorm(hidden_states) return hidden_states class BertLMPredictionHead(nn.Module): def __init__(self, config): super().__init__() self.transform = BertPredictionHeadTransform(config) # The output weights are the same as the input embeddings, but there is # an output-only bias for each token. self.decoder = nn.Linear( config.hidden_size, config.vocab_size, bias=False) self.bias = nn.Parameter(torch.zeros(config.vocab_size)) # Need a link between the two variables so that the bias is correctly resized with `resize_token_embeddings` self.decoder.bias = self.bias def forward(self, hidden_states): hidden_states = self.transform(hidden_states) hidden_states = self.decoder(hidden_states) return hidden_states class BertOnlyMLMHead(nn.Module): def __init__(self, config): super().__init__() self.predictions = BertLMPredictionHead(config) def forward(self, sequence_output): prediction_scores = self.predictions(sequence_output) return prediction_scores class BertOnlyNSPHead(nn.Module): def __init__(self, config): super().__init__() self.seq_relationship = nn.Linear(config.hidden_size, 2) def forward(self, pooled_output): seq_relationship_score = self.seq_relationship(pooled_output) return seq_relationship_score class BertPreTrainingHeads(nn.Module): def __init__(self, config): super().__init__() self.predictions = BertLMPredictionHead(config) self.seq_relationship = nn.Linear(config.hidden_size, 2) def forward(self, sequence_output, pooled_output): prediction_scores = self.predictions(sequence_output) seq_relationship_score = self.seq_relationship(pooled_output) return prediction_scores, seq_relationship_score class BertPreTrainedModel(PreTrainedModel): """ An abstract class to handle weights initialization and a simple interface for downloading and loading pretrained models. """ config_class = BertConfig load_tf_weights = load_tf_weights_in_bert base_model_prefix = 'bert' _keys_to_ignore_on_load_missing = [r'position_ids'] def _init_weights(self, module): """ Initialize the weights """ if isinstance(module, (nn.Linear, nn.Embedding)): # Slightly different from the TF version which uses truncated_normal for initialization # cf https://github.com/pytorch/pytorch/pull/5617 module.weight.data.normal_( mean=0.0, std=self.config.initializer_range) elif isinstance(module, nn.LayerNorm): module.bias.data.zero_() module.weight.data.fill_(1.0) if isinstance(module, nn.Linear) and module.bias is not None: module.bias.data.zero_() @dataclass class BertForPreTrainingOutput(ModelOutput): """ Output type of :class:`~transformers.BertForPreTraining`. Args: loss (`optional`, returned when ``labels`` is provided, ``torch.FloatTensor`` of shape :obj:`(1,)`): Total loss as the sum of the masked language modeling loss and the next sequence prediction (classification) loss. prediction_logits (:obj:`torch.FloatTensor` of shape :obj:`(batch_size, sequence_length, config.vocab_size)`): Prediction scores of the language modeling head (scores for each vocabulary token before SoftMax). seq_relationship_logits (:obj:`torch.FloatTensor` of shape :obj:`(batch_size, 2)`): Prediction scores of the next sequence prediction (classification) head (scores of True/False continuation before SoftMax). hidden_states (:obj:`tuple(torch.FloatTensor)`, `optional`, returned when ``output_hidden_states=True`` is passed or when ``config.output_hidden_states=True``): Tuple of :obj:`torch.FloatTensor` (one for the output of the embeddings + one for the output of each layer) of shape :obj:`(batch_size, sequence_length, hidden_size)`. Hidden-states of the model at the output of each layer plus the initial embedding outputs. attentions (:obj:`tuple(torch.FloatTensor)`, `optional`, returned when ``output_attentions=True`` is passed or when ``config.output_attentions=True``): Tuple of :obj:`torch.FloatTensor` (one for each layer) of shape :obj:`(batch_size, num_heads, sequence_length, sequence_length)`. Attentions weights after the attention softmax, used to compute the weighted average in the self-attention heads. """ loss: Optional[torch.FloatTensor] = None prediction_logits: torch.FloatTensor = None seq_relationship_logits: torch.FloatTensor = None hidden_states: Optional[Tuple[torch.FloatTensor]] = None attentions: Optional[Tuple[torch.FloatTensor]] = None class BertModel(BertPreTrainedModel): """ Noted that the bert model here is slightly updated from original bert, so we maintain the code here independently. The Bert Model transformer outputting raw hidden-states without any specific head on top. This model inherits from [`PreTrainedModel`]. Check the superclass documentation for the generic methods the library implements for all its model (such as downloading or saving, resizing the input embeddings, pruning heads etc.) This model is also a PyTorch [torch.nn.Module](https://pytorch.org/docs/stable/nn.html#torch.nn.Module) subclass. Use it as a regular PyTorch Module and refer to the PyTorch documentation for all matter related to general usage and behavior. Parameters: config ([`BertConfig`]): Model configuration class with all the parameters of the model. Initializing with a config file does not load the weights associated with the model, only the configuration. Check out the [`~PreTrainedModel.from_pretrained`] method to load the model weights. The model can behave as an encoder (with only self-attention) as well as a decoder, in which case a layer of cross-attention is added between the self-attention layers, following the architecture described in [Attention is all you need](https://arxiv.org/abs/1706.03762) by Ashish Vaswani, Noam Shazeer, Niki Parmar, Jakob Uszkoreit, Llion Jones, Aidan N. Gomez, Lukasz Kaiser and Illia Polosukhin. To behave as an decoder the model needs to be initialized with the `is_decoder` argument of the configuration set to `True`. To be used in a Seq2Seq model, the model needs to initialized with both `is_decoder` argument and `add_cross_attention` set to `True`; an `encoder_hidden_states` is then expected as an input to the forward pass. """ def __init__(self, config, add_pooling_layer=True): super().__init__(config) self.config = config if config.gis_embedding == 0: self.embeddings = BertEmbeddings(config) else: self.embeddings = GisEmbeddings(config) self.encoder = BertEncoder(config) self.pooler = BertPooler(config) if add_pooling_layer else None self.init_weights() def get_input_embeddings(self): return self.embeddings.word_embeddings def set_input_embeddings(self, value): self.embeddings.word_embeddings = value def _prune_heads(self, heads_to_prune): """ Prunes heads of the model. heads_to_prune: dict of {layer_num: list of heads to prune in this layer} See base class PreTrainedModel """ for layer, heads in heads_to_prune.items(): self.encoder.layer[layer].attention.prune_heads(heads) def get_extended_attention_mask(self, attention_mask: Tensor, input_shape: Tuple[int], device: device, is_decoder: bool) -> Tensor: """ Makes broadcastable attention and causal masks so that future and masked tokens are ignored. Arguments: attention_mask (:obj:`torch.Tensor`): Mask with ones indicating tokens to attend to, zeros for tokens to ignore. input_shape (:obj:`Tuple[int]`): The shape of the input to the model. device: (:obj:`torch.device`): The device of the input to the model. Returns: :obj:`torch.Tensor` The extended attention mask, with a the same dtype as :obj:`attention_mask.dtype`. """ # We can provide a self-attention mask of dimensions [batch_size, # from_seq_length, to_seq_length] ourselves in which case we just need # to make it broadcastable to all heads. if attention_mask.dim() == 3: extended_attention_mask = attention_mask[:, None, :, :] elif attention_mask.dim() == 2: # Provided a padding mask of dimensions [batch_size, seq_length] # - if the model is a decoder, apply a causal mask in addition to # the padding mask # - if the model is an encoder, make the mask broadcastable to # [batch_size, num_heads, seq_length, seq_length] if is_decoder: batch_size, seq_length = input_shape seq_ids = torch.arange(seq_length, device=device) causal_mask = seq_ids[None, None, :].repeat( batch_size, seq_length, 1) <= seq_ids[None, :, None] # in case past_key_values are used we need to add a prefix ones # mask to the causal mask causal and attention masks must have # same type with pytorch version < 1.3 causal_mask = causal_mask.to(attention_mask.dtype) if causal_mask.shape[1] < attention_mask.shape[1]: prefix_seq_len = attention_mask.shape[ 1] - causal_mask.shape[1] causal_mask = torch.cat( [ torch.ones( (batch_size, seq_length, prefix_seq_len), device=device, dtype=causal_mask.dtype), causal_mask, ], axis=-1, ) extended_attention_mask = causal_mask[:, None, :, :] * attention_mask[:, None, None, :] else: extended_attention_mask = attention_mask[:, None, None, :] else: raise ValueError( 'Wrong shape for input_ids (shape {}) or attention_mask (shape {})' .format(input_shape, attention_mask.shape)) # Since attention_mask is 1.0 for positions we want to attend and 0.0 # for masked positions, this operation will create a tensor which is 0.0 # for positions we want to attend and -10000.0 for masked positions. # Since we are adding it to the raw scores before the softmax, this is # effectively the same as removing these entirely. extended_attention_mask = extended_attention_mask.to( dtype=self.dtype) # fp16 compatibility extended_attention_mask = (1.0 - extended_attention_mask) * -10000.0 return extended_attention_mask def forward( self, input_ids=None, attention_mask=None, token_type_ids=None, position_ids=None, head_mask=None, inputs_embeds=None, encoder_embeds=None, encoder_hidden_states=None, encoder_attention_mask=None, past_key_values=None, use_cache=None, output_attentions=None, output_hidden_states=None, return_dict=None, is_decoder=False, mode='multi_modal', rel_type_ids=None, absolute_position_ids=None, relative_position_ids=None, prov_ids=None, city_ids=None, dist_ids=None, ): r""" Args: input_ids (`torch.LongTensor` of shape `((batch_size, sequence_length)`): Indices of input sequence tokens in the vocabulary. Indices can be obtained using [`BertTokenizer`]. See [`PreTrainedTokenizer.encode`] and [`PreTrainedTokenizer.__call__`] for details. [What are input IDs?](../glossary#input-ids) attention_mask (`torch.FloatTensor` of shape `((batch_size, sequence_length)`, *optional*): Mask to avoid performing attention on padding token indices. Mask values selected in `[0, 1]`: - 1 for tokens that are **not masked**, - 0 for tokens that are **masked**. [What are attention masks?](../glossary#attention-mask) token_type_ids (`torch.LongTensor` of shape `((batch_size, sequence_length)`, *optional*): Segment token indices to indicate first and second portions of the inputs. Indices are selected in `[0, 1]`: - 0 corresponds to a *sentence A* token, - 1 corresponds to a *sentence B* token. [What are token type IDs?](../glossary#token-type-ids) position_ids (`torch.LongTensor` of shape `((batch_size, sequence_length)`, *optional*): Indices of positions of each input sequence tokens in the position embeddings. Selected in the range `[0, config.max_position_embeddings - 1]`. [What are position IDs?](../glossary#position-ids) head_mask (`torch.FloatTensor` of shape `(num_heads,)` or `(num_layers, num_heads)`, *optional*): Mask to nullify selected heads of the self-attention modules. Mask values selected in `[0, 1]`: - 1 indicates the head is **not masked**, - 0 indicates the head is **masked**. inputs_embeds (`torch.FloatTensor` of shape `((batch_size, sequence_length, hidden_size)`, *optional*): Optionally, instead of passing `input_ids` you can choose to directly pass an embedded representation. This is useful if you want more control over how to convert `input_ids` indices into associated vectors than the model's internal embedding lookup matrix. output_attentions (`bool`, *optional*): Whether or not to return the attentions tensors of all attention layers. See `attentions` under returned tensors for more detail. output_hidden_states (`bool`, *optional*): Whether or not to return the hidden states of all layers. See `hidden_states` under returned tensors for more detail. return_dict (`bool`, *optional*): Whether or not to return a [`~file_utils.ModelOutput`] instead of a plain tuple. encoder_hidden_states (`torch.FloatTensor` of shape `(batch_size, sequence_length, hidden_size)`, *optional*): Sequence of hidden-states at the output of the last layer of the encoder. Used in the cross-attention if the model is configured as a decoder. encoder_attention_mask (`torch.FloatTensor` of shape `(batch_size, sequence_length)`, *optional*): Mask to avoid performing attention on the padding token indices of the encoder input. This mask is used in the cross-attention if the model is configured as a decoder. Mask values selected in `[0, 1]`: - 1 for tokens that are **not masked**, - 0 for tokens that are **masked**. past_key_values (`tuple(tuple(torch.FloatTensor))` of length `config.n_layers` with each tuple having 4 tensors of shape `(batch_size, num_heads, sequence_length - 1, embed_size_per_head)`): Contains precomputed key and value hidden states of the attention blocks. Can be used to speed up decoding. If `past_key_values` are used, the user can optionally input only the last `decoder_input_ids` (those that don't have their past key value states given to this model) of shape `(batch_size, 1)` instead of all `decoder_input_ids` of shape `(batch_size, sequence_length)`. use_cache (`bool`, *optional*): If set to `True`, `past_key_values` key value states are returned and can be used to speed up decoding (see `past_key_values`). Others (**kwargs) some additional parameters might passed in from upstream pipeline, which not influence the results. """ output_attentions = output_attentions if output_attentions is not None else self.config.output_attentions output_hidden_states = ( output_hidden_states if output_hidden_states is not None else self.config.output_hidden_states) return_dict = return_dict if return_dict is not None else self.config.use_return_dict if is_decoder: use_cache = use_cache if use_cache is not None else self.config.use_cache else: use_cache = False if input_ids is not None and inputs_embeds is not None: raise ValueError( 'You cannot specify both input_ids and inputs_embeds at the same time' ) elif input_ids is not None: input_shape = input_ids.size() batch_size, seq_length = input_shape device = input_ids.device elif inputs_embeds is not None: input_shape = inputs_embeds.size()[:-1] batch_size, seq_length = input_shape device = inputs_embeds.device elif encoder_embeds is not None: input_shape = encoder_embeds.size()[:-1] batch_size, seq_length = input_shape device = encoder_embeds.device else: raise ValueError( 'You have to specify either input_ids or inputs_embeds or encoder_embeds' ) # past_key_values_length past_key_values_length = past_key_values[0][0].shape[ 2] if past_key_values is not None else 0 if attention_mask is None: attention_mask = torch.ones( ((batch_size, seq_length + past_key_values_length)), device=device) if token_type_ids is None: token_type_ids = torch.zeros( input_shape, dtype=torch.long, device=device) # We can provide a self-attention mask of dimensions [batch_size, # from_seq_length, to_seq_length] ourselves in which case we just need # to make it broadcastable to all heads. extended_attention_mask: torch.Tensor = self.get_extended_attention_mask( attention_mask, input_shape, device, is_decoder) # If a 2D or 3D attention mask is provided for the cross-attention we # need to make broadcastable to [batch_size, num_heads, seq_length, # seq_length] if encoder_hidden_states is not None: if type(encoder_hidden_states) == list: encoder_batch_size, encoder_sequence_length, _ = encoder_hidden_states[ 0].size() else: encoder_batch_size, encoder_sequence_length, _ = encoder_hidden_states.size( ) encoder_hidden_shape = (encoder_batch_size, encoder_sequence_length) if type(encoder_attention_mask) == list: encoder_extended_attention_mask = [ self.invert_attention_mask(mask) for mask in encoder_attention_mask ] elif encoder_attention_mask is None: encoder_attention_mask = torch.ones( encoder_hidden_shape, device=device) encoder_extended_attention_mask = self.invert_attention_mask( encoder_attention_mask) else: encoder_extended_attention_mask = self.invert_attention_mask( encoder_attention_mask) else: encoder_extended_attention_mask = None # Prepare head mask if needed # 1.0 in head_mask indicate we keep the head # attention_probs has shape bsz x n_heads x N x N # input head_mask has shape [num_heads] or [num_hidden_layers x num_heads] # and head_mask is converted to shape [num_hidden_layers x batch x num_heads x seq_length x seq_length] head_mask = self.get_head_mask(head_mask, self.config.num_hidden_layers) if encoder_embeds is None: embedding_output = self.embeddings( input_ids=input_ids, position_ids=position_ids, token_type_ids=token_type_ids, inputs_embeds=inputs_embeds, past_key_values_length=past_key_values_length, rel_type_ids=rel_type_ids, absolute_position_ids=absolute_position_ids, relative_position_ids=relative_position_ids, prov_ids=prov_ids, city_ids=city_ids, dist_ids=dist_ids, ) else: embedding_output = encoder_embeds encoder_outputs = self.encoder( embedding_output, attention_mask=extended_attention_mask, head_mask=head_mask, encoder_hidden_states=encoder_hidden_states, encoder_attention_mask=encoder_extended_attention_mask, past_key_values=past_key_values, use_cache=use_cache, output_attentions=output_attentions, output_hidden_states=output_hidden_states, return_dict=return_dict, mode=mode, ) sequence_output = encoder_outputs[0] pooled_output = self.pooler( sequence_output) if self.pooler is not None else None if not return_dict: return (sequence_output, pooled_output) + encoder_outputs[1:] return BaseModelOutputWithPoolingAndCrossAttentions( last_hidden_state=sequence_output, pooler_output=pooled_output, past_key_values=encoder_outputs.past_key_values, hidden_states=encoder_outputs.hidden_states, attentions=encoder_outputs.attentions, cross_attentions=encoder_outputs.cross_attentions, ) class BertForPreTraining(BertPreTrainedModel): def __init__(self, config): super().__init__(config) self.bert = BertModel(config) self.cls = BertPreTrainingHeads(config) self.init_weights() def get_output_embeddings(self): return self.cls.predictions.decoder def set_output_embeddings(self, new_embeddings): self.cls.predictions.decoder = new_embeddings def forward( self, input_ids=None, attention_mask=None, token_type_ids=None, position_ids=None, head_mask=None, inputs_embeds=None, labels=None, next_sentence_label=None, output_attentions=None, output_hidden_states=None, return_dict=None, ): r""" labels (:obj:`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]`` next_sentence_label (``torch.LongTensor`` of shape ``(batch_size,)``, `optional`): Labels for computing the next sequence prediction (classification) loss. Input should be a sequence pair (see :obj:`input_ids` docstring) Indices should be in ``[0, 1]``: - 0 indicates sequence B is a continuation of sequence A, - 1 indicates sequence B is a random sequence. kwargs (:obj:`Dict[str, any]`, optional, defaults to `{}`): Used to hide legacy arguments that have been deprecated. Returns: Example: >>> from transformers import BertTokenizer, BertForPreTraining >>> import torch >>> tokenizer = BertTokenizer.from_pretrained('bert-base-uncased') >>> model = BertForPreTraining.from_pretrained('bert-base-uncased') >>> inputs = tokenizer("Hello, my dog is cute", return_tensors="pt") >>> outputs = model(**inputs) >>> prediction_logits = outputs.prediction_logits >>> seq_relationship_logits = outputs.seq_relationship_logits """ 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, output_attentions=output_attentions, output_hidden_states=output_hidden_states, return_dict=return_dict, ) sequence_output, pooled_output = outputs[:2] prediction_scores, seq_relationship_score = self.cls( sequence_output, pooled_output) total_loss = None if labels is not None and next_sentence_label is not None: loss_fct = CrossEntropyLoss() masked_lm_loss = loss_fct( prediction_scores.view(-1, self.config.vocab_size), labels.view(-1)) next_sentence_loss = loss_fct( seq_relationship_score.view(-1, 2), next_sentence_label.view(-1)) total_loss = masked_lm_loss + next_sentence_loss if not return_dict: output = (prediction_scores, seq_relationship_score) + outputs[2:] return ((total_loss, ) + output) if total_loss is not None else output return BertForPreTrainingOutput( loss=total_loss, prediction_logits=prediction_scores, seq_relationship_logits=seq_relationship_score, hidden_states=outputs.hidden_states, attentions=outputs.attentions, ) class BertLMHeadModel(BertPreTrainedModel): _keys_to_ignore_on_load_unexpected = [r'pooler'] _keys_to_ignore_on_load_missing = [ r'position_ids', r'predictions.decoder.bias' ] def __init__(self, config): super().__init__(config) self.bert = BertModel(config, add_pooling_layer=False) self.cls = BertOnlyMLMHead(config) self.init_weights() def get_output_embeddings(self): return self.cls.predictions.decoder def set_output_embeddings(self, new_embeddings): self.cls.predictions.decoder = new_embeddings def forward( self, input_ids=None, attention_mask=None, token_type_ids=None, position_ids=None, head_mask=None, inputs_embeds=None, encoder_hidden_states=None, encoder_attention_mask=None, labels=None, past_key_values=None, use_cache=None, output_attentions=None, output_hidden_states=None, return_dict=None, is_decoder=True, reduction='mean', mode='multi_modal', soft_labels=None, alpha=0, return_logits=False, ): r""" encoder_hidden_states (:obj:`torch.FloatTensor` of shape :obj:`(batch_size, sequence_length, hidden_size)`, `optional`): Sequence of hidden-states at the output of the last layer of the encoder. Used in the cross-attention if the model is configured as a decoder. encoder_attention_mask (:obj:`torch.FloatTensor` of shape :obj:`(batch_size, sequence_length)`, `optional`): Mask to avoid performing attention on the padding token indices of the encoder input. This mask is used in the cross-attention if the model is configured as a decoder. Mask values selected in ``[0, 1]``: - 1 for tokens that are **not masked**, - 0 for tokens that are **masked**. labels (:obj:`torch.LongTensor` of shape :obj:`(batch_size, sequence_length)`, `optional`): Labels for computing the left-to-right language modeling loss (next word prediction). 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 n ``[0, ..., config.vocab_size]`` past_key_values (:obj:`tuple(tuple(torch.FloatTensor))` of length :obj:`config.n_layers` with each tuple having 4 tensors of shape :obj:`(batch_size, num_heads, sequence_length - 1, embed_size_per_head)`): Contains precomputed key and value hidden states of the attention blocks. Can be used to speed up decoding. If :obj:`past_key_values` are used, the user can optionally input only the last :obj:`decoder_input_ids` (those that don't have their past key value states given to this model) of shape :obj:`(batch_size, 1)` instead of all :obj:`decoder_input_ids` of shape :obj:`(batch_size, sequence_length)`. use_cache (:obj:`bool`, `optional`): If set to :obj:`True`, :obj:`past_key_values` key value states are returned and can be used to speed up decoding (see :obj:`past_key_values`). Returns: Example: >>> from transformers import BertTokenizer, BertLMHeadModel, BertConfig >>> import torch >>> tokenizer = BertTokenizer.from_pretrained('bert-base-cased') >>> config = BertConfig.from_pretrained("bert-base-cased") >>> model = BertLMHeadModel.from_pretrained('bert-base-cased', config=config) >>> inputs = tokenizer("Hello, my dog is cute", return_tensors="pt") >>> outputs = model(**inputs) >>> prediction_logits = outputs.logits """ return_dict = return_dict if return_dict is not None else self.config.use_return_dict if labels is not None: use_cache = False 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, past_key_values=past_key_values, use_cache=use_cache, output_attentions=output_attentions, output_hidden_states=output_hidden_states, return_dict=return_dict, is_decoder=is_decoder, mode=mode, ) sequence_output = outputs[0] prediction_scores = self.cls(sequence_output) if return_logits: return prediction_scores[:, :-1, :].contiguous() lm_loss = None if labels is not None: # we are doing next-token prediction; shift prediction scores and input ids by one shifted_prediction_scores = prediction_scores[:, : -1, :].contiguous() labels = labels[:, 1:].contiguous() loss_fct = CrossEntropyLoss(reduction=reduction) lm_loss = loss_fct( shifted_prediction_scores.view(-1, self.config.vocab_size), labels.view(-1)) lm_loss = lm_loss.view(prediction_scores.size(0), -1).sum(1) if soft_labels is not None: loss_distill = -torch.sum( F.log_softmax(shifted_prediction_scores, dim=-1) * soft_labels, dim=-1) loss_distill = (loss_distill * (labels != -100)).sum(1) lm_loss = (1 - alpha) * lm_loss + alpha * loss_distill if not return_dict: output = (prediction_scores, ) + outputs[2:] return ((lm_loss, ) + output) if lm_loss is not None else output return CausalLMOutputWithCrossAttentions( loss=lm_loss, logits=prediction_scores, past_key_values=outputs.past_key_values, hidden_states=outputs.hidden_states, attentions=outputs.attentions, cross_attentions=outputs.cross_attentions, ) def prepare_inputs_for_generation(self, input_ids, past=None, attention_mask=None, **model_kwargs): input_shape = input_ids.shape # if model is used as a decoder in encoder-decoder model, the decoder attention mask is created on the fly if attention_mask is None: attention_mask = input_ids.new_ones(input_shape) # cut decoder_input_ids if past is used if past is not None: input_ids = input_ids[:, -1:] return { 'input_ids': input_ids, 'attention_mask': attention_mask, 'past_key_values': past, 'encoder_hidden_states': model_kwargs.get('encoder_hidden_states', None), 'encoder_attention_mask': model_kwargs.get('encoder_attention_mask', None), 'is_decoder': True, } def _reorder_cache(self, past, beam_idx): reordered_past = () for layer_past in past: reordered_past += (tuple( past_state.index_select(0, beam_idx) for past_state in layer_past), ) return reordered_past class GisBertLMPredictionHead(nn.Module): def __init__(self, config, vocab_size): super().__init__() self.transform = BertPredictionHeadTransform(config) # The output weights are the same as the input embeddings, but there is # an output-only bias for each token. self.decoder = nn.Linear(config.hidden_size, vocab_size, bias=False) self.bias = nn.Parameter(torch.zeros(vocab_size)) # Need a link between the two variables so that the bias is correctly resized with `resize_token_embeddings` self.decoder.bias = self.bias def forward(self, hidden_states): hidden_states = self.transform(hidden_states) hidden_states = self.decoder(hidden_states) return hidden_states class BertForGisMaskedLM(BertPreTrainedModel): _keys_to_ignore_on_load_unexpected = [r'pooler'] _keys_to_ignore_on_load_missing = [ r'position_ids', r'predictions.decoder.bias' ] def __init__(self, config): super().__init__(config) self.bert = BertModel(config, add_pooling_layer=False) self.cls_geom_id = GisBertLMPredictionHead(config, config.vocab_size) self.cls_geom_type = GisBertLMPredictionHead(config, config.type_vocab_size) self.cls_rel_type = GisBertLMPredictionHead(config, config.rel_type_vocab_size) self.cls_absolute_position_x1 = GisBertLMPredictionHead( config, config.absolute_x_vocab_size) self.cls_absolute_position_x2 = GisBertLMPredictionHead( config, config.absolute_x_vocab_size) self.cls_absolute_position_y1 = GisBertLMPredictionHead( config, config.absolute_y_vocab_size) self.cls_absolute_position_y2 = GisBertLMPredictionHead( config, config.absolute_y_vocab_size) self.cls_relative_position_x1 = GisBertLMPredictionHead( config, config.relative_x_vocab_size) self.cls_relative_position_x2 = GisBertLMPredictionHead( config, config.relative_x_vocab_size) self.cls_relative_position_y1 = GisBertLMPredictionHead( config, config.relative_y_vocab_size) self.cls_relative_position_y2 = GisBertLMPredictionHead( config, config.relative_y_vocab_size) self.config = config self.init_weights() def forward( self, input_ids=None, attention_mask=None, token_type_ids=None, position_ids=None, head_mask=None, inputs_embeds=None, encoder_embeds=None, encoder_hidden_states=None, encoder_attention_mask=None, labels=None, output_attentions=None, output_hidden_states=None, return_dict=None, is_decoder=False, mode='multi_modal', soft_labels=None, alpha=0, return_logits=False, rel_type_ids=None, absolute_position_ids=None, relative_position_ids=None, token_type_ids_label=None, rel_type_ids_label=None, absolute_position_ids_label=None, relative_position_ids_label=None, ): r""" labels (:obj:`torch.LongTensor` of shape :obj:`(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_embeds=encoder_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, is_decoder=is_decoder, mode=mode, rel_type_ids=rel_type_ids, absolute_position_ids=absolute_position_ids, relative_position_ids=relative_position_ids, ) sequence_output = outputs[0] prediction_scores = self.cls_geom_id(sequence_output) loss_fct = CrossEntropyLoss() # -100 index = padding token masked_lm_loss = loss_fct( prediction_scores.view(-1, self.config.vocab_size), labels.view(-1)) positions_cls = [ self.cls_geom_type, self.cls_rel_type, self.cls_absolute_position_x1, self.cls_absolute_position_x2, self.cls_absolute_position_y1, self.cls_absolute_position_y2, self.cls_relative_position_x1, self.cls_relative_position_x2, self.cls_relative_position_y1, self.cls_relative_position_y2 ] positions_label = [ token_type_ids_label, rel_type_ids_label, absolute_position_ids_label[:, :, 0], absolute_position_ids_label[:, :, 2], absolute_position_ids_label[:, :, 1], absolute_position_ids_label[:, :, 3], relative_position_ids_label[:, :, 0], relative_position_ids_label[:, :, 2], relative_position_ids_label[:, :, 1], relative_position_ids_label[:, :, 3] ] positions_size = [ self.config.type_vocab_size, self.config.rel_type_vocab_size, self.config.absolute_x_vocab_size, self.config.absolute_x_vocab_size, self.config.absolute_y_vocab_size, self.config.absolute_y_vocab_size, self.config.relative_x_vocab_size, self.config.relative_x_vocab_size, self.config.relative_y_vocab_size, self.config.relative_y_vocab_size ] for mycls, mylabels, mysize in zip(positions_cls, positions_label, positions_size): if mylabels is not None: myprediction_scores = mycls(sequence_output) masked_lm_loss += loss_fct( myprediction_scores.view(-1, mysize), mylabels.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 assert self.config.pad_token_id is not None, 'The PAD token should be defined for generation' padding_mask = attention_mask.new_zeros((attention_mask.shape[0], 1)) attention_mask = torch.cat([attention_mask, padding_mask], 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} class BertForMaskedLM(BertPreTrainedModel): _keys_to_ignore_on_load_unexpected = [r'pooler'] _keys_to_ignore_on_load_missing = [ r'position_ids', r'predictions.decoder.bias' ] def __init__(self, config): super().__init__(config) self.bert = BertModel(config, add_pooling_layer=False) self.cls = BertOnlyMLMHead(config) self.init_weights() def get_output_embeddings(self): return self.cls.predictions.decoder def set_output_embeddings(self, new_embeddings): self.cls.predictions.decoder = new_embeddings def forward( self, input_ids=None, attention_mask=None, token_type_ids=None, position_ids=None, head_mask=None, inputs_embeds=None, encoder_embeds=None, encoder_hidden_states=None, encoder_attention_mask=None, labels=None, output_attentions=None, output_hidden_states=None, return_dict=None, is_decoder=False, mode='multi_modal', soft_labels=None, alpha=0, return_logits=False, rel_type_ids=None, absolute_position_ids=None, relative_position_ids=None, ): r""" labels (:obj:`torch.LongTensor` of shape :obj:`(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_embeds=encoder_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, is_decoder=is_decoder, mode=mode, rel_type_ids=rel_type_ids, absolute_position_ids=absolute_position_ids, relative_position_ids=relative_position_ids, ) sequence_output = outputs[0] prediction_scores = self.cls(sequence_output) if return_logits: return prediction_scores masked_lm_loss = None if labels is not None: loss_fct = CrossEntropyLoss() # -100 index = padding token masked_lm_loss = loss_fct( prediction_scores.view(-1, self.config.vocab_size), labels.view(-1)) if soft_labels is not None: loss_distill = -torch.sum( F.log_softmax(prediction_scores, dim=-1) * soft_labels, dim=-1) loss_distill = loss_distill[labels != -100].mean() masked_lm_loss = (1 - alpha) * masked_lm_loss + alpha * loss_distill 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 assert self.config.pad_token_id is not None, 'The PAD token should be defined for generation' padding_mask = attention_mask.new_zeros((attention_mask.shape[0], 1)) attention_mask = torch.cat([attention_mask, padding_mask], 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} class BertForNextSentencePrediction(BertPreTrainedModel): def __init__(self, config): super().__init__(config) self.bert = BertModel(config) self.cls = BertOnlyNSPHead(config) self.init_weights() def forward(self, input_ids=None, attention_mask=None, token_type_ids=None, position_ids=None, head_mask=None, inputs_embeds=None, labels=None, output_attentions=None, output_hidden_states=None, return_dict=None, **kwargs): r""" labels (:obj:`torch.LongTensor` of shape :obj:`(batch_size,)`, `optional`): Labels for computing the next sequenåce prediction (classification) loss. Input should be a sequence pair (see ``input_ids`` docstring). Indices should be in ``[0, 1]``: - 0 indicates sequence B is a continuation of sequence A, - 1 indicates sequence B is a random sequence. Returns: Example: >>> from transformers import BertTokenizer, BertForNextSentencePrediction >>> import torch >>> tokenizer = BertTokenizer.from_pretrained('bert-base-uncased') >>> model = BertForNextSentencePrediction.from_pretrained('bert-base-uncased') >>> prompt = "In Italy, pizza served in formal settings, such as at a restaurant, is presented unsliced." >>> next_sentence = "The sky is blue due to the shorter wavelength of blue light." >>> encoding = tokenizer(prompt, next_sentence, return_tensors='pt') >>> outputs = model(**encoding, labels=torch.LongTensor([1])) >>> logits = outputs.logits >>> assert logits[0, 0] < logits[0, 1] # next sentence was random """ 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, output_attentions=output_attentions, output_hidden_states=output_hidden_states, return_dict=return_dict, ) pooled_output = outputs[1] seq_relationship_scores = self.cls(pooled_output) next_sentence_loss = None if labels is not None: loss_fct = CrossEntropyLoss() next_sentence_loss = loss_fct( seq_relationship_scores.view(-1, 2), labels.view(-1)) if not return_dict: output = (seq_relationship_scores, ) + outputs[2:] return ((next_sentence_loss, ) + output) if next_sentence_loss is not None else output return NextSentencePredictorOutput( loss=next_sentence_loss, logits=seq_relationship_scores, hidden_states=outputs.hidden_states, attentions=outputs.attentions, ) class BertForSequenceClassification(BertPreTrainedModel): def __init__(self, config): super().__init__(config) self.num_labels = config.num_labels self.bert = BertModel(config) self.dropout = nn.Dropout(config.hidden_dropout_prob) self.classifier = nn.Linear(config.hidden_size, config.num_labels) self.init_weights() def forward( self, input_ids=None, attention_mask=None, token_type_ids=None, position_ids=None, head_mask=None, inputs_embeds=None, labels=None, output_attentions=None, output_hidden_states=None, return_dict=None, ): r""" labels (:obj:`torch.LongTensor` of shape :obj:`(batch_size,)`, `optional`): Labels for computing the sequence classification/regression loss. Indices should be in :obj:`[0, ..., config.num_labels - 1]`. If :obj:`config.num_labels == 1` a regression loss is computed (Mean-Square loss), If :obj:`config.num_labels > 1` a classification loss is computed (Cross-Entropy). """ 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, output_attentions=output_attentions, output_hidden_states=output_hidden_states, return_dict=return_dict, ) pooled_output = outputs[1] pooled_output = self.dropout(pooled_output) logits = self.classifier(pooled_output) loss = None if labels is not None: if self.num_labels == 1: # We are doing regression loss_fct = MSELoss() loss = loss_fct(logits.view(-1), labels.view(-1)) else: loss_fct = CrossEntropyLoss() loss = loss_fct( logits.view(-1, self.num_labels), labels.view(-1)) if not return_dict: output = (logits, ) + outputs[2:] return ((loss, ) + output) if loss is not None else output return SequenceClassifierOutput( loss=loss, logits=logits, hidden_states=outputs.hidden_states, attentions=outputs.attentions, ) class BertForMultipleChoice(BertPreTrainedModel): def __init__(self, config): super().__init__(config) self.bert = BertModel(config) self.dropout = nn.Dropout(config.hidden_dropout_prob) self.classifier = nn.Linear(config.hidden_size, 1) self.init_weights() def forward( self, input_ids=None, attention_mask=None, token_type_ids=None, position_ids=None, head_mask=None, inputs_embeds=None, labels=None, output_attentions=None, output_hidden_states=None, return_dict=None, ): r""" labels (:obj:`torch.LongTensor` of shape :obj:`(batch_size,)`, `optional`): Labels for computing the multiple choice classification loss. Indices should be in ``[0, ..., num_choices-1]`` where :obj:`num_choices` is the size of the second dimension of the input tensors. (See :obj:`input_ids` above) """ return_dict = return_dict if return_dict is not None else self.config.use_return_dict num_choices = input_ids.shape[ 1] if input_ids is not None else inputs_embeds.shape[1] input_ids = input_ids.view( -1, input_ids.size(-1)) if input_ids is not None else None attention_mask = attention_mask.view( -1, attention_mask.size(-1)) if attention_mask is not None else None token_type_ids = token_type_ids.view( -1, token_type_ids.size(-1)) if token_type_ids is not None else None position_ids = position_ids.view( -1, position_ids.size(-1)) if position_ids is not None else None inputs_embeds = ( inputs_embeds.view(-1, inputs_embeds.size(-2), inputs_embeds.size(-1)) if inputs_embeds is not None else None) 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, output_attentions=output_attentions, output_hidden_states=output_hidden_states, return_dict=return_dict, ) pooled_output = outputs[1] pooled_output = self.dropout(pooled_output) logits = self.classifier(pooled_output) reshaped_logits = logits.view(-1, num_choices) loss = None if labels is not None: loss_fct = CrossEntropyLoss() loss = loss_fct(reshaped_logits, labels) if not return_dict: output = (reshaped_logits, ) + outputs[2:] return ((loss, ) + output) if loss is not None else output return MultipleChoiceModelOutput( loss=loss, logits=reshaped_logits, hidden_states=outputs.hidden_states, attentions=outputs.attentions, ) class BertForTokenClassification(BertPreTrainedModel): _keys_to_ignore_on_load_unexpected = [r'pooler'] def __init__(self, config): super().__init__(config) self.num_labels = config.num_labels self.bert = BertModel(config, add_pooling_layer=False) self.dropout = nn.Dropout(config.hidden_dropout_prob) self.classifier = nn.Linear(config.hidden_size, config.num_labels) self.init_weights() def forward( self, input_ids=None, attention_mask=None, token_type_ids=None, position_ids=None, head_mask=None, inputs_embeds=None, labels=None, output_attentions=None, output_hidden_states=None, return_dict=None, ): r""" labels (:obj:`torch.LongTensor` of shape :obj:`(batch_size, sequence_length)`, `optional`): Labels for computing the token classification loss. Indices should be in ``[0, ..., config.num_labels - 1]``. """ 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, output_attentions=output_attentions, output_hidden_states=output_hidden_states, return_dict=return_dict, ) sequence_output = outputs[0] sequence_output = self.dropout(sequence_output) logits = self.classifier(sequence_output) loss = None if labels is not None: loss_fct = CrossEntropyLoss() # Only keep active parts of the loss if attention_mask is not None: active_loss = attention_mask.view(-1) == 1 active_logits = logits.view(-1, self.num_labels) active_labels = torch.where( active_loss, labels.view(-1), torch.tensor(loss_fct.ignore_index).type_as(labels)) loss = loss_fct(active_logits, active_labels) else: loss = loss_fct( logits.view(-1, self.num_labels), labels.view(-1)) if not return_dict: output = (logits, ) + outputs[2:] return ((loss, ) + output) if loss is not None else output return TokenClassifierOutput( loss=loss, logits=logits, hidden_states=outputs.hidden_states, attentions=outputs.attentions, ) class BertForQuestionAnswering(BertPreTrainedModel): _keys_to_ignore_on_load_unexpected = [r'pooler'] def __init__(self, config): super().__init__(config) self.num_labels = config.num_labels self.bert = BertModel(config, add_pooling_layer=False) self.qa_outputs = nn.Linear(config.hidden_size, config.num_labels) self.init_weights() def forward( self, input_ids=None, attention_mask=None, token_type_ids=None, position_ids=None, head_mask=None, inputs_embeds=None, start_positions=None, end_positions=None, output_attentions=None, output_hidden_states=None, return_dict=None, ): r""" start_positions (:obj:`torch.LongTensor` of shape :obj:`(batch_size,)`, `optional`): Labels for position (index) of the start of the labelled span for computing the token classification loss. Positions are clamped to the length of the sequence (:obj:`sequence_length`). Position outside of the sequence are not taken into account for computing the loss. end_positions (:obj:`torch.LongTensor` of shape :obj:`(batch_size,)`, `optional`): Labels for position (index) of the end of the labelled span for computing the token classification loss. Positions are clamped to the length of the sequence (:obj:`sequence_length`). Position outside of the sequence are not taken into account for computing the loss. """ 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, output_attentions=output_attentions, output_hidden_states=output_hidden_states, return_dict=return_dict, ) sequence_output = outputs[0] logits = self.qa_outputs(sequence_output) start_logits, end_logits = logits.split(1, dim=-1) start_logits = start_logits.squeeze(-1) end_logits = end_logits.squeeze(-1) total_loss = None if start_positions is not None and end_positions is not None: # If we are on multi-GPU, split add a dimension if len(start_positions.size()) > 1: start_positions = start_positions.squeeze(-1) if len(end_positions.size()) > 1: end_positions = end_positions.squeeze(-1) # sometimes the start/end positions are outside our model inputs, we ignore these terms ignored_index = start_logits.size(1) start_positions.clamp_(0, ignored_index) end_positions.clamp_(0, ignored_index) loss_fct = CrossEntropyLoss(ignore_index=ignored_index) start_loss = loss_fct(start_logits, start_positions) end_loss = loss_fct(end_logits, end_positions) total_loss = (start_loss + end_loss) / 2 if not return_dict: output = (start_logits, end_logits) + outputs[2:] return ((total_loss, ) + output) if total_loss is not None else output return QuestionAnsweringModelOutput( loss=total_loss, start_logits=start_logits, end_logits=end_logits, hidden_states=outputs.hidden_states, attentions=outputs.attentions, ) class MGeoPreTrainedModel(TorchModel, PreTrainedModel): """ An abstract class to handle weights initialization and a simple interface for downloading and loading pretrained models. """ config_class = BertConfig base_model_prefix = 'bert' supports_gradient_checkpointing = True _keys_to_ignore_on_load_missing = [r'position_ids'] def __init__(self, config, **kwargs): super().__init__(config.name_or_path, **kwargs) super(Model, self).__init__(config) def _init_weights(self, module): """Initialize the weights""" if isinstance(module, nn.Linear): # Slightly different from the TF version which uses truncated_normal for initialization # cf https://github.com/pytorch/pytorch/pull/5617 module.weight.data.normal_( mean=0.0, std=self.config.initializer_range) if module.bias is not None: module.bias.data.zero_() elif isinstance(module, nn.Embedding): module.weight.data.normal_( mean=0.0, std=self.config.initializer_range) if module.padding_idx is not None: module.weight.data[module.padding_idx].zero_() elif isinstance(module, nn.LayerNorm): module.bias.data.zero_() module.weight.data.fill_(1.0) def _set_gradient_checkpointing(self, module, value=False): if isinstance(module, BertEncoder): module.gradient_checkpointing = value @classmethod def _instantiate(cls, **kwargs): """Instantiate the model. Args: kwargs: Input args. model_dir: The model dir used to load the checkpoint and the label information. num_labels: An optional arg to tell the model how many classes to initialize. Method will call utils.parse_label_mapping if num_labels not supplied. If num_labels is not found, the model will use the default setting (2 classes). Returns: The loaded model, which is initialized by transformers.PreTrainedModel.from_pretrained """ model_dir = kwargs.pop('model_dir', None) cfg = kwargs.pop('cfg', None) model_args = parse_labels_in_order(model_dir, cfg, **kwargs) if model_dir is None: config = BertConfig(**model_args) model = cls(config) else: model = super(Model, cls).from_pretrained( pretrained_model_name_or_path=model_dir, **model_args) model.model_dir = model_dir return model @MODELS.register_module(Tasks.backbone, module_name=Models.mgeo) class MGeo(MGeoPreTrainedModel): def __init__(self, config: BertConfig, finetune_mode: str = 'single-modal', gis_num: int = 1, add_pooling_layer=False, **kwargs): super().__init__(config) self.finetune_mode = finetune_mode self.config = config self.text_encoder = BertModel( config, add_pooling_layer=add_pooling_layer) if self.finetune_mode == 'multi-modal': gis_config = BertConfig.from_dict(config.gis_encoder) self.gis_encoder = BertModel(gis_config, add_pooling_layer=False) for param in self.gis_encoder.parameters(): param.requires_grad = False self.gis2text = nn.Linear(gis_config.hidden_size, self.config.hidden_size) self.gis_type = nn.Embedding(gis_num, gis_config.hidden_size) self.init_weights() def forward(self, input_ids=None, attention_mask=None, token_type_ids=None, position_ids=None, head_mask=None, inputs_embeds=None, encoder_embeds=None, encoder_hidden_states=None, encoder_attention_mask=None, past_key_values=None, use_cache=None, output_attentions=None, output_hidden_states=None, return_dict=None, is_decoder=False, mode='single-modal', gis_list=None, gis_tp=None, use_token_type=False): if self.finetune_mode == 'multi-modal' and gis_list is not None and len( gis_list) > 0: gis_embs = [] gis_atts = [] for gis in gis_list: gis_embs.append( self.gis_encoder(return_dict=True, mode='text', **gis).last_hidden_state) gis_atts.append(gis['attention_mask']) if use_token_type: embedding_output = self.text_encoder.embeddings( input_ids=input_ids, position_ids=position_ids, token_type_ids=token_type_ids, ) else: embedding_output = self.text_encoder.embeddings( input_ids=input_ids, ) if self.finetune_mode == 'multi-modal' and gis_list is not None and len( gis_list) > 0: embs = [embedding_output] atts = [attention_mask] tp_emb = [self.gis_type(gtp) for gtp in gis_tp] for ge, ga, gt in zip(gis_embs, gis_atts, tp_emb): embs.append(self.gis2text(ge + gt)) atts.append(ga) merge_emb = torch.cat(embs, dim=1) merge_attention = torch.cat(atts, dim=-1) else: merge_emb = embedding_output merge_attention = attention_mask encoder_outputs = self.text_encoder( attention_mask=merge_attention, encoder_embeds=merge_emb, output_attentions=output_attentions, output_hidden_states=output_hidden_states, return_dict=return_dict, mode='text') if not return_dict: return encoder_outputs return AttentionBackboneModelOutput( last_hidden_state=encoder_outputs.last_hidden_state, pooler_output=encoder_outputs.pooler_output, past_key_values=encoder_outputs.past_key_values, hidden_states=encoder_outputs.hidden_states, attentions=encoder_outputs.attentions, cross_attentions=encoder_outputs.cross_attentions, ) return output def extract_sequence_outputs(self, outputs): return outputs['last_hidden_state'] def extract_pooled_outputs(self, outputs): return outputs['pooler_output']