def __init__(self, config: SimilarityConfig):
super(Similarity, self).__init__()
self.text_encoder = TextEncoder(config.product_text_encoder_config)
self.text_encoder = self.text_encoder.to(GlobalConfig.device)
self.image_encoder = ImageEncoder(config.product_image_encoder_config)
self.image_encoder = self.image_encoder.to(GlobalConfig.device)
self.linear = nn.Linear(config.mm_size, config.context_vector_size)
self.linear = self.linear.to(GlobalConfig.device)
class Similarity(nn.Module):
def __init__(self, config: SimilarityConfig):
super(Similarity, self).__init__()
self.text_encoder = TextEncoder(config.product_text_encoder_config)
self.text_encoder = self.text_encoder.to(GlobalConfig.device)
self.image_encoder = ImageEncoder(config.product_image_encoder_config)
self.image_encoder = self.image_encoder.to(GlobalConfig.device)
self.linear = nn.Linear(config.mm_size, config.context_vector_size)
self.linear = self.linear.to(GlobalConfig.device)
def forward(self, context, text, text_length, image):
"""Forward.
Args:
context: Context (batch_size, ContextEncoderConfig.output_size).
text: Product text (batch_size, product_text_max_len).
text_length: Product text length (batch_size, ).
image: Product image (batch_size, 3, image_size, image_size).
Returns:
"""
batch_size = context.size(0)
sos = SOS_ID * torch.ones(batch_size, dtype=torch.long).view(-1, 1).to(
GlobalConfig.device)
# (batch_size)
# Concat SOS.
text = torch.cat((sos, text), 1).to(GlobalConfig.device)
# (batch_size, product_text_max_len)
text_length += 1
# (batch_size, )
encoded_text, _ = self.text_encoder(text, text_length)
# (batch_size, text_feat_size)
encoded_image = self.image_encoder(image, encoded_text)
# (batch_size, image_feat_size)
mm = torch.cat((encoded_text, encoded_image), 1)
mm = mm.to(GlobalConfig.device)
mm = self.linear(mm)
return cosine_similarity(context, mm)
def build_models(self):
# ###################encoders######################################## #
image_encoder = ImageEncoder(output_channels=cfg.hidden_dim)
if cfg.text_encoder_path != '':
img_encoder_path = cfg.text_encoder_path.replace('text_encoder', 'image_encoder')
print('Load image encoder from:', img_encoder_path)
state_dict = torch.load(img_encoder_path, map_location='cpu')
if 'model' in state_dict.keys():
image_encoder.load_state_dict(state_dict['model'])
else:
image_encoder.load_state_dict(state_dict)
for p in image_encoder.parameters(): # make image encoder grad on
p.requires_grad = True
# image_encoder.eval()
epoch = 0
###################################################################
text_encoder = TextEncoder(bert_config = self.bert_config)
if cfg.text_encoder_path != '':
epoch = cfg.text_encoder_path[istart:iend]
epoch = int(epoch) + 1
text_encoder_path = cfg.text_encoder_path
print('Load text encoder from:', text_encoder_path)
state_dict = torch.load(text_encoder_path, map_location='cpu')
if 'model' in state_dict.keys():
text_encoder.load_state_dict(state_dict['model'])
else:
text_encoder.load_state_dict(state_dict)
for p in text_encoder.parameters(): # make text encoder grad on
p.requires_grad = True
# ########################################################### #
if cfg.CUDA:
text_encoder = text_encoder.cuda()
image_encoder = image_encoder.cuda()
return [text_encoder, image_encoder, epoch]
def knowledge_attribute_train(context_text_encoder: TextEncoder,
context_image_encoder: ImageEncoder,
context_encoder: ContextEncoder,
train_dataset: Dataset,
valid_dataset: Dataset,
test_dataset: Dataset,
model_file: str,
attribute_data: AttributeData,
vocab: Dict[str, int],
embed_init=None):
"""Knowledge styletip train.
Args:
context_text_encoder (TextEncoder): Context text encoder.
context_image_encoder (ImageEncoder): Context image encoder.
context_encoder (ContextEncoder): Context encoder.
train_dataset (Dataset): Train dataset.
valid_dataset (Dataset): Valid dataset.
test_dataset (Dataset): Test dataset.
model_file (str): Saved model file.
attribute_data (AttributeData): Attribute data.
vocab (Dict[str, int]): Vocabulary.
embed_init: Initial embedding (vocab_size, embed_size).
"""
# Data loader.
train_data_loader = DataLoader(
dataset=train_dataset,
batch_size=KnowledgeAttributeTrainConfig.batch_size,
shuffle=True,
num_workers=KnowledgeAttributeTrainConfig.num_data_loader_workers)
# Model.
vocab_size = len(vocab)
attribute_kv_memory_config = AttributeKVMemoryConfig(
len(attribute_data.key_vocab), len(attribute_data.value_vocab))
text_decoder_config = KnowledgeTextDecoderConfig(vocab_size,
MemoryConfig.memory_size,
MemoryConfig.output_size,
embed_init)
to_hidden = ToHidden(text_decoder_config)
to_hidden = to_hidden.to(GlobalConfig.device)
attribute_kv_memory = KVMemory(attribute_kv_memory_config)
attribute_kv_memory = attribute_kv_memory.to(GlobalConfig.device)
text_decoder = TextDecoder(text_decoder_config)
text_decoder = text_decoder.to(GlobalConfig.device)
# Model parameters.
params = list(
chain.from_iterable([
list(model.parameters()) for model in [
context_text_encoder, context_image_encoder, context_encoder,
to_hidden, attribute_kv_memory, text_decoder
]
]))
optimizer = Adam(params, lr=KnowledgeAttributeTrainConfig.learning_rate)
epoch_id = 0
min_valid_loss = None
# Load saved state.
if isfile(model_file):
state = torch.load(model_file)
to_hidden.load_state_dict(state['to_hidden'])
attribute_kv_memory.load_state_dict(state['attribute_kv_memory'])
text_decoder.load_state_dict(state['text_decoder'])
optimizer.load_state_dict(state['optimizer'])
epoch_id = state['epoch_id']
min_valid_loss = state['min_valid_loss']
# Loss.
sum_loss = 0
bad_loss_cnt = 0
# Switch to train mode.
context_text_encoder.train()
context_image_encoder.train()
context_encoder.train()
to_hidden.train()
attribute_kv_memory.train()
text_decoder.train()
finished = False
for epoch_id in range(epoch_id,
KnowledgeAttributeTrainConfig.num_iterations):
for batch_id, train_data in enumerate(train_data_loader):
# Set gradients to 0.
optimizer.zero_grad()
train_data, products = train_data
keys, values, pair_length = products
keys = keys.to(GlobalConfig.device)
values = values.to(GlobalConfig.device)
pair_length = pair_length.to(GlobalConfig.device)
texts, text_lengths, images, utter_types = train_data
# Sizes:
# texts: (batch_size, dialog_context_size + 1, dialog_text_max_len)
# text_lengths: (batch_size, dialog_context_size + 1)
# images: (batch_size, dialog_context_size + 1,
# pos_images_max_num, 3, image_size, image_size)
# utter_types: (batch_size, )
# To device.
texts = texts.to(GlobalConfig.device)
text_lengths = text_lengths.to(GlobalConfig.device)
images = images.to(GlobalConfig.device)
utter_types = utter_types.to(GlobalConfig.device)
texts.transpose_(0, 1)
# (dialog_context_size + 1, batch_size, dialog_text_max_len)
text_lengths.transpose_(0, 1)
# (dialog_context_size + 1, batch_size)
images.transpose_(0, 1)
images.transpose_(1, 2)
# (dialog_context_size + 1, pos_images_max_num, batch_size, 3,
# image_size, image_size)
# Encode context.
context, hiddens = encode_context(context_text_encoder,
context_image_encoder,
context_encoder, texts,
text_lengths, images)
# (batch_size, context_vector_size)
encode_knowledge_func = partial(attribute_kv_memory, keys, values,
pair_length)
loss, n_totals = text_loss(to_hidden, text_decoder,
text_decoder_config.text_length,
context, texts[-1], text_lengths[-1],
hiddens, encode_knowledge_func)
sum_loss += loss / text_decoder_config.text_length
loss.backward()
optimizer.step()
# Print loss every `TrainConfig.print_freq` batches.
if (batch_id + 1) % KnowledgeAttributeTrainConfig.print_freq == 0:
cur_time = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
sum_loss /= KnowledgeAttributeTrainConfig.print_freq
print('epoch: {} \tbatch: {} \tloss: {} \ttime: {}'.format(
epoch_id + 1, batch_id + 1, sum_loss, cur_time))
sum_loss = 0
# Valid every `TrainConfig.valid_freq` batches.
if (batch_id + 1) % KnowledgeAttributeTrainConfig.valid_freq == 0:
valid_loss = knowledge_attribute_valid(
context_text_encoder, context_image_encoder,
context_encoder, to_hidden, attribute_kv_memory,
text_decoder, valid_dataset,
text_decoder_config.text_length)
cur_time = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
print('valid_loss: {} \ttime: {}'.format(valid_loss, cur_time))
# Save current best model.
if min_valid_loss is None or valid_loss < min_valid_loss:
min_valid_loss = valid_loss
bad_loss_cnt = 0
save_dict = {
'task': KNOWLEDGE_ATTRIBUTE_SUBTASK,
'epoch_id': epoch_id,
'min_valid_loss': min_valid_loss,
'optimizer': optimizer.state_dict(),
'context_text_encoder':
context_text_encoder.state_dict(),
'context_image_encoder':
context_image_encoder.state_dict(),
'context_encoder': context_encoder.state_dict(),
'to_hidden': to_hidden.state_dict(),
'attribute_kv_memory':
attribute_kv_memory.state_dict(),
'text_decoder': text_decoder.state_dict()
}
torch.save(save_dict, model_file)
print('Best model saved.')
else:
bad_loss_cnt += 1
if bad_loss_cnt > KnowledgeAttributeTrainConfig.patience:
knowledge_attribute_test(
context_text_encoder, context_image_encoder,
context_encoder, to_hidden, attribute_kv_memory,
text_decoder, test_dataset,
text_decoder_config.text_length, vocab)
finished = True
break
if finished:
break
def intention_valid(context_text_encoder: TextEncoder,
context_image_encoder: ImageEncoder,
context_encoder: ContextEncoder, intention: Intention,
valid_dataset: Dataset):
"""Intention valid.
Args:
context_text_encoder (TextEncoder): Context text encoder.
context_image_encoder (ImageEncoder): Context image encoder.
context_encoder (ContextEncoder): Context encoder.
intention (Intention): Intention.
valid_dataset (Dataset): Valid dataset.
"""
# Valid dataset loader.
valid_data_loader = DataLoader(
valid_dataset,
batch_size=IntentionValidConfig.batch_size,
shuffle=True,
num_workers=IntentionValidConfig.num_data_loader_workers)
sum_loss = 0
sum_accuracy = 0
num_batches = 0
# Switch to eval mode.
context_text_encoder.eval()
context_image_encoder.eval()
context_encoder.eval()
intention.eval()
with torch.no_grad():
for batch_id, valid_data in enumerate(valid_data_loader):
# Only valid `ValidConfig.num_batches` batches.
if batch_id >= IntentionValidConfig.num_batches:
break
num_batches += 1
texts, text_lengths, images, utter_types = valid_data
# Sizes:
# texts: (batch_size, dialog_context_size + 1, dialog_text_max_len)
# text_lengths: (batch_size, dialog_context_size + 1)
# images: (batch_size, dialog_context_size + 1,
# pos_images_max_num, 3, image_size, image_size)
# utter_types: (batch_size, )
# To device.
texts = texts.to(GlobalConfig.device)
text_lengths = text_lengths.to(GlobalConfig.device)
images = images.to(GlobalConfig.device)
utter_types = utter_types.to(GlobalConfig.device)
texts.transpose_(0, 1)
# (dialog_context_size + 1, batch_size, dialog_text_max_len)
text_lengths.transpose_(0, 1)
# (dialog_context_size + 1, batch_size)
images.transpose_(0, 1)
images.transpose_(1, 2)
# (dialog_context_size + 1, pos_images_max_num, batch_size, 3,
# image_size, image_size)
# Encode context.
context, _ = encode_context(context_text_encoder,
context_image_encoder, context_encoder,
texts, text_lengths, images)
# (batch_size, context_vector_size)
intent_prob = intention(context)
# (batch_size, utterance_type_size)
loss = nll_loss(intent_prob, utter_types)
sum_loss += loss
eqs = torch.eq(torch.argmax(intent_prob, dim=1), utter_types)
accuracy = torch.sum(eqs).item() * 1.0 / eqs.size(0)
sum_accuracy += accuracy
# Switch to train mode.
context_text_encoder.train()
context_image_encoder.train()
context_encoder.train()
intention.train()
return sum_loss / num_batches, sum_accuracy / num_batches
def knowledge_celebrity_valid(
context_text_encoder: TextEncoder, context_image_encoder: ImageEncoder,
context_encoder: ContextEncoder, to_hidden: ToHidden,
celebrity_memory: Memory, text_decoder: TextDecoder,
valid_dataset: Dataset, celebrity_scores, text_length: int):
"""Knowledge celebrity valid.
Args:
context_text_encoder (TextEncoder): Context text encoder.
context_image_encoder (ImageEncoder): Context image encoder.
context_encoder (ContextEncoder): Context encoder.
to_hidden (ToHidden): Context to hidden.
celebrity_memory (Memory): Celebrity Memory.
text_decoder (TextDecoder): Text decoder.
valid_dataset (Dataset): Valid dataset.
celebrity_scores: Celebrity scores.
text_length (int): Text length.
"""
# Valid dataset loader.
valid_data_loader = DataLoader(
valid_dataset,
batch_size=KnowledgeCelebrityValidConfig.batch_size,
shuffle=True,
num_workers=KnowledgeCelebrityValidConfig.num_data_loader_workers)
sum_loss = 0
num_batches = 0
# Switch to eval mode.
context_text_encoder.eval()
context_image_encoder.eval()
context_encoder.eval()
to_hidden.eval()
celebrity_memory.eval()
text_decoder.eval()
with torch.no_grad():
for batch_id, valid_data in enumerate(valid_data_loader):
# Only valid `ValidConfig.num_batches` batches.
if batch_id >= KnowledgeCelebrityValidConfig.num_batches:
break
num_batches += 1
texts, text_lengths, images, utter_types = valid_data
# Sizes:
# texts: (batch_size, dialog_context_size + 1, dialog_text_max_len)
# text_lengths: (batch_size, dialog_context_size + 1)
# images: (batch_size, dialog_context_size + 1,
# pos_images_max_num, 3, image_size, image_size)
# utter_types: (batch_size, )
# To device.
texts = texts.to(GlobalConfig.device)
text_lengths = text_lengths.to(GlobalConfig.device)
images = images.to(GlobalConfig.device)
# utter_types = utter_types.to(GlobalConfig.device)
texts.transpose_(0, 1)
# (dialog_context_size + 1, batch_size, dialog_text_max_len)
text_lengths.transpose_(0, 1)
# (dialog_context_size + 1, batch_size)
images.transpose_(0, 1)
images.transpose_(1, 2)
# (dialog_context_size + 1, pos_images_max_num, batch_size, 3,
# image_size, image_size)
# Encode context.
context, hiddens = encode_context(context_text_encoder,
context_image_encoder,
context_encoder, texts,
text_lengths, images)
# (batch_size, context_vector_size)
knowledge_entry = celebrity_scores
encode_knowledge_func = partial(celebrity_memory, knowledge_entry)
loss, n_totals = text_loss(to_hidden, text_decoder, text_length,
context, texts[-1], text_lengths[-1],
hiddens, encode_knowledge_func)
sum_loss += loss / text_length
# Switch to train mode.
context_text_encoder.train()
context_image_encoder.train()
context_encoder.train()
to_hidden.train()
celebrity_memory.train()
text_decoder.train()
return sum_loss / num_batches
def recommend_train(context_text_encoder: TextEncoder,
context_image_encoder: ImageEncoder,
context_encoder: ContextEncoder,
train_dataset: Dataset,
valid_dataset: Dataset,
test_dataset: Dataset,
model_file: str,
vocab_size: int,
embed_init=None):
"""Recommend train.
Args:
context_text_encoder (TextEncoder): Context text encoder.
context_image_encoder (ImageEncoder): Context image encoder.
context_encoder (ContextEncoder): Context encoder.
train_dataset (Dataset): Train dataset.
valid_dataset (Dataset): Valid dataset.
test_dataset (Dataset): Test dataset.
model_file (str): Saved model file.
vocab_size (int): Vocabulary size.
embed_init: Initial embedding (vocab_size, embed_size).
"""
# Data loader.
train_data_loader = DataLoader(
dataset=train_dataset,
batch_size=RecommendTrainConfig.batch_size,
shuffle=True,
num_workers=RecommendTrainConfig.num_data_loader_workers)
# Model.
similarity_config = SimilarityConfig(vocab_size, embed_init)
similarity = Similarity(similarity_config).to(GlobalConfig.device)
# Model parameters.
params = list(
chain.from_iterable([
list(model.parameters()) for model in [
context_text_encoder, context_image_encoder, context_encoder,
similarity
]
]))
optimizer = Adam(params, lr=RecommendTrainConfig.learning_rate)
epoch_id = 0
min_valid_loss = None
# Load saved state.
if isfile(model_file):
state = torch.load(model_file)
similarity.load_state_dict(state['similarity'])
optimizer.load_state_dict(state['optimizer'])
epoch_id = state['epoch_id']
min_valid_loss = state['min_valid_loss']
# Loss.
sum_loss = 0
bad_loss_cnt = 0
# Switch to train mode.
context_text_encoder.train()
context_image_encoder.train()
context_encoder.train()
similarity.train()
finished = False
for epoch_id in range(epoch_id, RecommendTrainConfig.num_iterations):
for batch_id, train_data in enumerate(train_data_loader):
# Sets gradients to 0.
optimizer.zero_grad()
context_dialog, pos_products, neg_products = train_data
texts, text_lengths, images, utter_types = context_dialog
# Sizes:
# texts: (batch_size, dialog_context_size + 1, dialog_text_max_len)
# text_lengths: (batch_size, dialog_context_size + 1)
# images: (batch_size, dialog_context_size + 1,
# pos_images_max_num, 3, image_size, image_size)
# utter_types: (batch_size, )
batch_size = texts.size(0)
# To device.
texts = texts.to(GlobalConfig.device)
text_lengths = text_lengths.to(GlobalConfig.device)
images = images.to(GlobalConfig.device)
# utter_types = utter_types.to(GlobalConfig.device)
texts.transpose_(0, 1)
# (dialog_context_size + 1, batch_size, dialog_text_max_len)
text_lengths.transpose_(0, 1)
# (dialog_context_size + 1, batch_size)
images.transpose_(0, 1)
images.transpose_(1, 2)
# (dialog_context_size + 1, pos_images_max_num, batch_size, 3,
# image_size, image_size)
# Encode context.
context, _ = encode_context(context_text_encoder,
context_image_encoder, context_encoder,
texts, text_lengths, images)
# (batch_size, context_vector_size)
loss = recommend_loss(similarity, batch_size, context,
pos_products, neg_products)
sum_loss += loss
loss.backward()
optimizer.step()
# Print loss every `TrainConfig.print_freq` batches.
if (batch_id + 1) % RecommendTrainConfig.print_freq == 0:
cur_time = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
sum_loss /= RecommendTrainConfig.print_freq
print('epoch: {} \tbatch: {} \tloss: {} \ttime: {}'.format(
epoch_id + 1, batch_id + 1, sum_loss, cur_time))
sum_loss = 0
# Valid every `TrainConfig.valid_freq` batches.
if (batch_id + 1) % RecommendTrainConfig.valid_freq == 0:
valid_loss = recommend_valid(context_text_encoder,
context_image_encoder,
context_encoder, similarity,
valid_dataset)
cur_time = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
print('valid_loss: {} \ttime: {}'.format(valid_loss, cur_time))
# Save current best model.
if min_valid_loss is None or valid_loss < min_valid_loss:
min_valid_loss = valid_loss
bad_loss_cnt = 0
save_dict = {
'task': RECOMMEND_TASK,
'epoch_id': epoch_id,
'min_valid_loss': min_valid_loss,
'optimizer': optimizer.state_dict(),
'context_text_encoder':
context_text_encoder.state_dict(),
'context_image_encoder':
context_image_encoder.state_dict(),
'context_encoder': context_encoder.state_dict(),
'similarity': similarity.state_dict()
}
torch.save(save_dict, model_file)
print('Best model saved.')
else:
bad_loss_cnt += 1
if bad_loss_cnt > RecommendTrainConfig.patience:
recommend_test(context_text_encoder, context_image_encoder,
context_encoder, similarity, test_dataset)
finished = True
break
if finished:
break
def train(task: int, model_file_name: str):
"""Train model.
Args:
task (int): Task.
model_file_name (str): Model file name (saved or to be saved).
"""
# Check if data exists.
if not isfile(DatasetConfig.common_raw_data_file):
raise ValueError('No common raw data.')
# Load extracted common data.
common_data: CommonData = load_pkl(DatasetConfig.common_raw_data_file)
# Dialog data files.
train_dialog_data_file = DatasetConfig.get_dialog_filename(
task, TRAIN_MODE)
valid_dialog_data_file = DatasetConfig.get_dialog_filename(
task, VALID_MODE)
test_dialog_data_file = DatasetConfig.get_dialog_filename(task, TEST_MODE)
if not isfile(train_dialog_data_file):
raise ValueError('No train dialog data file.')
if not isfile(valid_dialog_data_file):
raise ValueError('No valid dialog data file.')
# Load extracted dialogs.
train_dialogs: List[TidyDialog] = load_pkl(train_dialog_data_file)
valid_dialogs: List[TidyDialog] = load_pkl(valid_dialog_data_file)
test_dialogs: List[TidyDialog] = load_pkl(test_dialog_data_file)
if task in {KNOWLEDGE_TASK}:
knowledge_data = KnowledgeData()
# Dataset wrap.
train_dataset = Dataset(
task,
common_data.dialog_vocab,
None, #common_data.obj_id,
train_dialogs,
knowledge_data if task == KNOWLEDGE_TASK else None)
valid_dataset = Dataset(
task,
common_data.dialog_vocab,
None, #common_data.obj_id,
valid_dialogs,
knowledge_data if task == KNOWLEDGE_TASK else None)
test_dataset = Dataset(
task,
common_data.dialog_vocab,
None, #common_data.obj_id,
test_dialogs,
knowledge_data if task == KNOWLEDGE_TASK else None)
print('Train dataset size:', len(train_dataset))
print('Valid dataset size:', len(valid_dataset))
print('Test dataset size:', len(test_dataset))
# Get initial embedding.
vocab_size = len(common_data.dialog_vocab)
embed_init = get_embed_init(common_data.glove,
vocab_size).to(GlobalConfig.device)
# Context model configurations.
context_text_encoder_config = ContextTextEncoderConfig(
vocab_size, embed_init)
context_image_encoder_config = ContextImageEncoderConfig()
context_encoder_config = ContextEncoderConfig()
# Context models.
context_text_encoder = TextEncoder(context_text_encoder_config)
context_text_encoder = context_text_encoder.to(GlobalConfig.device)
context_image_encoder = ImageEncoder(context_image_encoder_config)
context_image_encoder = context_image_encoder.to(GlobalConfig.device)
context_encoder = ContextEncoder(context_encoder_config)
context_encoder = context_encoder.to(GlobalConfig.device)
# Load model file.
model_file = join(DatasetConfig.dump_dir, model_file_name)
if isfile(model_file):
state = torch.load(model_file)
# if task != state['task']:
# raise ValueError("Task doesn't match.")
context_text_encoder.load_state_dict(state['context_text_encoder'])
context_image_encoder.load_state_dict(state['context_image_encoder'])
context_encoder.load_state_dict(state['context_encoder'])
# Task-specific parts.
if task == INTENTION_TASK:
intention_train(context_text_encoder, context_image_encoder,
context_encoder, train_dataset, valid_dataset,
test_dataset, model_file)
elif task == TEXT_TASK:
text_train(context_text_encoder, context_image_encoder,
context_encoder, train_dataset, valid_dataset, test_dataset,
model_file, common_data.dialog_vocab, embed_init)
elif task == RECOMMEND_TASK:
recommend_train(context_text_encoder, context_image_encoder,
context_encoder, train_dataset, valid_dataset,
test_dataset, model_file, vocab_size, embed_init)
elif task == KNOWLEDGE_TASK:
knowledge_attribute_train(context_text_encoder, context_image_encoder,
context_encoder, train_dataset,
valid_dataset, test_dataset, model_file,
knowledge_data.attribute_data,
common_data.dialog_vocab, embed_init)
def recommend_valid(
context_text_encoder: TextEncoder,
context_image_encoder: ImageEncoder,
context_encoder: ContextEncoder,
similarity: Similarity,
valid_dataset: Dataset):
"""Recommend valid.
Args:
context_text_encoder (TextEncoder): Context text encoder.
context_image_encoder (ImageEncoder): Context image encoder.
context_encoder (ContextEncoder): Context encoder.
similarity (Similarity): Intention.
valid_dataset (Dataset): Valid dataset.
"""
# Valid dataset loader.
valid_data_loader = DataLoader(
valid_dataset,
batch_size=RecommendValidConfig.batch_size,
shuffle=True,
num_workers=RecommendValidConfig.num_data_loader_workers
)
sum_loss = 0
num_batches = 0
# Switch to eval mode.
context_text_encoder.eval()
context_image_encoder.eval()
context_encoder.eval()
# similarity.eval()
# There might be a bug in the implement of resnet.
num_ranks = torch.zeros(DatasetConfig.neg_images_max_num + 1,
dtype=torch.long)
num_ranks = num_ranks.to(GlobalConfig.device)
total_samples = 0
with torch.no_grad():
for batch_id, valid_data in enumerate(valid_data_loader):
# Only valid `ValidConfig.num_batches` batches.
if batch_id >= RecommendValidConfig.num_batches:
break
num_batches += 1
context_dialog, pos_products, neg_products = valid_data
texts, text_lengths, images, utter_types = context_dialog
# Sizes:
# texts: (batch_size, dialog_context_size + 1, dialog_text_max_len)
# text_lengths: (batch_size, dialog_context_size + 1)
# images: (batch_size, dialog_context_size + 1,
# pos_images_max_num, 3, image_size, image_size)
# utter_types: (batch_size, )
batch_size = texts.size(0)
# To device.
texts = texts.to(GlobalConfig.device)
text_lengths = text_lengths.to(GlobalConfig.device)
images = images.to(GlobalConfig.device)
# utter_types = utter_types.to(GlobalConfig.device)
texts.transpose_(0, 1)
# (dialog_context_size + 1, batch_size, dialog_text_max_len)
text_lengths.transpose_(0, 1)
# (dialog_context_size + 1, batch_size)
images.transpose_(0, 1)
images.transpose_(1, 2)
# (dialog_context_size + 1, pos_images_max_num, batch_size, 3,
# image_size, image_size)
# Encode context.
context, _ = encode_context(
context_text_encoder,
context_image_encoder,
context_encoder,
texts,
text_lengths,
images
)
# (batch_size, context_vector_size)
loss = recommend_loss(similarity, batch_size, context,
pos_products, neg_products)
sum_loss += loss
num_rank = recommend_eval(
similarity,
batch_size,
context,
pos_products,
neg_products
)
total_samples += batch_size
num_ranks += num_rank
for i in range(DatasetConfig.neg_images_max_num):
print('total recall@{} = {}'.format(
i + 1,
torch.sum(num_ranks[:i + 1]).item() / total_samples))
# Switch to train mode.
context_text_encoder.train()
context_image_encoder.train()
context_encoder.train()
similarity.train()
return sum_loss / num_batches
def knowledge_test(
context_text_encoder: TextEncoder,
context_image_encoder: ImageEncoder,
context_encoder: ContextEncoder,
to_hidden: ToHidden,
attribute_kv_memory: KVMemory,
text_decoder: TextDecoder,
test_dataset: Dataset,
text_length: int,
vocab: Dict[str, int]):
"""Knowledge attribute test.
Args:
context_text_encoder (TextEncoder): Context text encoder.
context_image_encoder (ImageEncoder): Context image encoder.
context_encoder (ContextEncoder): Context encoder.
to_hidden (ToHidden): Context to hidden.
attribute_kv_memory (KVMemory): Attribute Key-Value Memory.
text_decoder (TextDecoder): Text decoder.
test_dataset (Dataset): Valid dataset.
text_length (int): Text length.
vocab (Dict[str, int]): Vocabulary.
"""
id2word: List[str] = [None] * len(vocab)
for word, wid in vocab.items():
id2word[wid] = word
# Test dataset loader.
test_data_loader = DataLoader(
test_dataset,
batch_size=KnowledgeAttributeTestConfig.batch_size,
num_workers=KnowledgeAttributeTestConfig.num_data_loader_workers
)
sum_loss = 0
num_batches = 0
# Switch to eval mode.
context_text_encoder.eval()
context_image_encoder.eval()
context_encoder.eval()
to_hidden.eval()
attribute_kv_memory.eval()
text_decoder.eval()
output_file = open('knowledge_attribute.out', 'w')
with torch.no_grad():
for batch_id, test_data in enumerate(test_data_loader):
num_batches += 1
test_data, products = test_data
keys, values, pair_length = products
keys = keys.to(GlobalConfig.device)
values = values.to(GlobalConfig.device)
pair_length = pair_length.to(GlobalConfig.device)
texts, text_lengths, images, utter_types = test_data
# Sizes:
# texts: (batch_size, dialog_context_size + 1, dialog_text_max_len)
# text_lengths: (batch_size, dialog_context_size + 1)
# images: (batch_size, dialog_context_size + 1,
# pos_images_max_num, 3, image_size, image_size)
# utter_types: (batch_size, )
# To device.
texts = texts.to(GlobalConfig.device)
text_lengths = text_lengths.to(GlobalConfig.device)
images = images.to(GlobalConfig.device)
texts.transpose_(0, 1)
# (dialog_context_size + 1, batch_size, dialog_text_max_len)
text_lengths.transpose_(0, 1)
# (dialog_context_size + 1, batch_size)
images.transpose_(0, 1)
images.transpose_(1, 2)
# (dialog_context_size + 1, pos_images_max_num, batch_size, 3,
# image_size, image_size)
# Encode context.
context, hiddens = encode_context(
context_text_encoder,
context_image_encoder,
context_encoder,
texts,
text_lengths,
images
)
# (batch_size, context_vector_size)
encode_knowledge_func = partial(attribute_kv_memory,
keys, values, pair_length)
text_eval(to_hidden, text_decoder, text_length, id2word,
context, texts[-1], hiddens,
encode_knowledge_func, output_file=output_file)
output_file.close()
def load_network(self):
image_generator = ImageGenerator()
image_generator.apply(weights_init)
disc_image = DiscriminatorImage()
disc_image.apply(weights_init)
emb_dim = 300
text_encoder = TextEncoder(emb_dim, self.txt_emb,
1, dropout=0.0)
attn_model = 'general'
text_generator = TextGenerator(attn_model, emb_dim, len(self.txt_dico.id2word),
self.txt_emb,
n_layers=1, dropout=0.0)
image_encoder = ImageEncoder()
image_encoder.apply(weights_init)
disc_latent = DiscriminatorLatent(emb_dim)
if cfg.NET_G != '':
state_dict = \
torch.load(cfg.NET_G,
map_location=lambda storage, loc: storage)
netG.load_state_dict(state_dict)
print('Load from: ', cfg.NET_G)
if cfg.NET_D != '':
state_dict = \
torch.load(cfg.NET_D,
map_location=lambda storage, loc: storage)
netD.load_state_dict(state_dict)
print('Load from: ', cfg.NET_D)
if cfg.ENCODER != '':
state_dict = \
torch.load(cfg.ENCODER,
map_location=lambda storage, loc: storage)
encoder.load_state_dict(state_dict)
print('Load from: ', cfg.ENCODER)
if cfg.DECODER != '':
state_dict = \
torch.load(cfg.DECODER,
map_location=lambda storage, loc: storage)
decoder.load_state_dict(state_dict)
print('Load from: ', cfg.DECODER)
if cfg.IMAGE_ENCODER != '':
state_dict = \
torch.load(cfg.IMAGE_ENCODER,
map_location=lambda storage, loc: storage)
image_encoder.load_state_dict(state_dict)
print('Load from: ', cfg.IMAGE_ENCODER)
if cfg.CUDA:
image_encoder.cuda()
image_generator.cuda()
text_encoder.cuda()
text_generator.cuda()
disc_image.cuda()
disc_latent.cuda()
return image_encoder, image_generator, text_encoder, text_generator, disc_image, disc_latent
def valid(epoch=1,
checkpoints_dir='./checkpoints',
use_bert=False,
data_path=None,
out_path='../prediction_result/valid_pred.json',
output_ndcg=True):
print("valid epoch{}".format(epoch))
if data_path is not None:
kdd_dataset = ValidDataset(data_path, use_bert=use_bert)
else:
kdd_dataset = ValidDataset(data_path, use_bert=use_bert)
loader = DataLoader(kdd_dataset,
collate_fn=collate_fn_valid,
batch_size=128,
shuffle=False,
num_workers=8)
tbar = tqdm(loader)
text_encoder = TextEncoder(kdd_dataset.unknown_token + 1,
1024,
256,
use_bert=use_bert).cuda()
image_encoder = ImageEncoder(input_dim=2048, output_dim=1024,
nhead=4).cuda()
score_model = ScoreModel(1024, 256).cuda()
# category_embedding = model.CategoryEmbedding(768).cuda()
checkpoints = torch.load(
os.path.join(checkpoints_dir, 'model-epoch{}.pth'.format(epoch)))
text_encoder.load_state_dict(checkpoints['query'])
image_encoder.load_state_dict(checkpoints['item'])
score_model.load_state_dict(checkpoints['score'])
# score_model.load_state_dict(checkpoints['score'])
outputs = {}
image_encoder.eval()
text_encoder.eval()
score_model.eval()
for query_id, product_id, query, query_len, features, boxes, category, obj_len in tbar:
query, query_len = query.cuda(), query_len.cuda()
query, hidden = text_encoder(query, query_len)
features, boxes, obj_len = features.cuda(), boxes.cuda(), obj_len.cuda(
)
features = image_encoder(features, boxes, obj_len)
score = score_model(query, hidden, query_len, features)
score = score.data.cpu().numpy()
# print(score2)
for q_id, p_id, s in zip(query_id.data.numpy(),
product_id.data.numpy(), score):
outputs.setdefault(str(q_id), [])
outputs[str(q_id)].append((p_id, s))
for k, v in outputs.items():
v = sorted(v, key=lambda x: x[1], reverse=True)
v = [(str(x[0]), float(x[1])) for x in v]
outputs[k] = v
with open(out_path, 'w') as f:
json.dump(outputs, f)
if output_ndcg:
pred = read_json(out_path)
gt = read_json('../data/valid/valid_answer.json')
score = 0
k = 5
for key, val in gt.items():
ground_truth_ids = [str(x) for x in val]
predictions = [x[0] for x in pred[key][:k]]
ref_vec = [1.0] * len(ground_truth_ids)
pred_vec = [
1.0 if pid in ground_truth_ids else 0.0 for pid in predictions
]
score += get_ndcg(pred_vec, ref_vec, k)
# print(key)
# print([pid for pid in predictions if pid not in ground_truth_ids])
# print('========')
# score += len(set(predictions).intersection(ground_truth_ids)) / len(ground_truth_ids)
score = score / len(gt)
print('ndcg@%d: %.4f' % (k, score))
return score
else:
return None
val_dataloader_mohx = DataLoader(dataset=val_dataset_mohx,
batch_size=batch_size,
shuffle=False,
collate_fn=TextDataset.collate_fn)
"""
3. Model training
"""
'''
3. 1
set up model, loss criterion, optimizer
'''
# Instantiate the model
Exp_model = TextEncoder(embedding_dim=1024,
hidden_size=256,
num_layers=1,
bidir=True,
dropout1=0.5)
Query_model = TextEncoder(embedding_dim=1024,
hidden_size=256,
num_layers=1,
bidir=True,
dropout1=0.5)
Attn_model = AttentionModel(para_encoder_input_dim=512,
query_dim=512,
output_dim=256)
para_encoder_attn_model = AttentionModel(para_encoder_input_dim=512,
query_dim=512,
output_dim=512)
para_encoder = ParaEncoder(input_dim=1024,
def knowledge_celebrity_test(context_text_encoder: TextEncoder,
context_image_encoder: ImageEncoder,
context_encoder: ContextEncoder,
to_hidden: ToHidden, celebrity_memory: Memory,
text_decoder: TextDecoder, test_dataset: Dataset,
celebrity_scores, text_length: int,
vocab: Dict[str, int]):
"""Knowledge celebrity test.
Args:
context_text_encoder (TextEncoder): Context text encoder.
context_image_encoder (ImageEncoder): Context image encoder.
context_encoder (ContextEncoder): Context encoder.
to_hidden (ToHidden): Context to hidden.
celebrity_memory (Memory): Celebrity Memory.
text_decoder (TextDecoder): Text decoder.
test_dataset (Dataset): Valid dataset.
celebrity_scores: Celebrity scores.
text_length (int): Text length.
vocab (Dict[str, int]): Vocabulary.
"""
id2word: List[str] = [None] * len(vocab)
for word, wid in vocab.items():
id2word[wid] = word
# Test dataset loader.
test_data_loader = DataLoader(
test_dataset,
batch_size=KnowledgeCelebrityTestConfig.batch_size,
num_workers=KnowledgeCelebrityTestConfig.num_data_loader_workers)
sum_loss = 0
# Switch to eval mode.
context_text_encoder.eval()
context_image_encoder.eval()
context_encoder.eval()
to_hidden.eval()
celebrity_memory.eval()
text_decoder.eval()
output_file = open('knowledge_celebrity.out', 'w')
with torch.no_grad():
for batch_id, test_data in enumerate(test_data_loader):
texts, text_lengths, images, utter_types = test_data
# Sizes:
# texts: (batch_size, dialog_context_size + 1, dialog_text_max_len)
# text_lengths: (batch_size, dialog_context_size + 1)
# images: (batch_size, dialog_context_size + 1,
# pos_images_max_num, 3, image_size, image_size)
# utter_types: (batch_size, )
# To device.
texts = texts.to(GlobalConfig.device)
text_lengths = text_lengths.to(GlobalConfig.device)
images = images.to(GlobalConfig.device)
texts.transpose_(0, 1)
# (dialog_context_size + 1, batch_size, dialog_text_max_len)
text_lengths.transpose_(0, 1)
# (dialog_context_size + 1, batch_size)
images.transpose_(0, 1)
images.transpose_(1, 2)
# (dialog_context_size + 1, pos_images_max_num, batch_size, 3,
# image_size, image_size)
# Encode context.
context, hiddens = encode_context(context_text_encoder,
context_image_encoder,
context_encoder, texts,
text_lengths, images)
# (batch_size, context_vector_size)
knowledge_entry = celebrity_scores
encode_knowledge_func = partial(celebrity_memory, knowledge_entry)
text_eval(to_hidden,
text_decoder,
text_length,
id2word,
context,
texts[-1],
hiddens,
encode_knowledge_func,
output_file=output_file)
output_file.close()
device = torch.device("cuda", local_rank)
checkpoints_dir = './checkpoints'
start_epoch = 0
use_bert = True
if not os.path.exists(checkpoints_dir) and local_rank == 0:
os.makedirs(checkpoints_dir)
kdd_dataset = Dataset(use_bert=use_bert)
sampler = DistributedSampler(kdd_dataset)
loader = DataLoader(kdd_dataset,
collate_fn=collate_fn,
batch_size=130,
sampler=sampler,
num_workers=15)
nhead = 4
text_encoder = TextEncoder(kdd_dataset.unknown_token + 1,
1024,
256,
use_bert=use_bert).cuda()
image_encoder = ImageEncoder(input_dim=2048, output_dim=1024, nhead=nhead)
image_encoder.load_pretrained_weights(
path='../user_data/image_encoder_large.pth')
image_encoder = image_encoder.cuda()
score_model = ScoreModel(1024, 256).cuda()
# text_generator = TextGenerator(text_encoder.embed.num_embeddings).cuda()
# score_model = ScoreModel(30522, 256, num_heads=1).cuda()
# category_embedding = CategoryEmbedding(256).cuda()
optimizer = Adam(image_encoder.get_params() + text_encoder.get_params() +
score_model.get_params())
if start_epoch > 0 and local_rank == 0:
checkpoints = torch.load(
def intention_test(context_text_encoder: TextEncoder,
context_image_encoder: ImageEncoder,
context_encoder: ContextEncoder, intention: Intention,
test_dataset: Dataset):
"""Intention test.
Args:
context_text_encoder (TextEncoder): Context text encoder.
context_image_encoder (ImageEncoder): Context image encoder.
context_encoder (ContextEncoder): Context encoder.
intention (Intention): Intention.
test_dataset (Dataset): Test dataset.
"""
# Test dataset loader.
test_data_loader = DataLoader(
test_dataset,
batch_size=IntentionTestConfig.batch_size,
shuffle=False,
num_workers=IntentionTestConfig.num_data_loader_workers)
sum_accuracy = 0
# Switch to eval mode.
context_text_encoder.eval()
context_image_encoder.eval()
context_encoder.eval()
intention.eval()
with torch.no_grad():
for batch_id, valid_data in enumerate(test_data_loader):
texts, text_lengths, images, utter_types = valid_data
# Sizes:
# texts: (batch_size, dialog_context_size + 1, dialog_text_max_len)
# text_lengths: (batch_size, dialog_context_size + 1)
# images: (batch_size, dialog_context_size + 1,
# pos_images_max_num, 3, image_size, image_size)
# utter_types: (batch_size, )
# To device.
texts = texts.to(GlobalConfig.device)
text_lengths = text_lengths.to(GlobalConfig.device)
images = images.to(GlobalConfig.device)
utter_types = utter_types.to(GlobalConfig.device)
texts.transpose_(0, 1)
# (dialog_context_size + 1, batch_size, dialog_text_max_len)
text_lengths.transpose_(0, 1)
# (dialog_context_size + 1, batch_size)
images.transpose_(0, 1)
images.transpose_(1, 2)
# (dialog_context_size + 1, pos_images_max_num, batch_size, 3,
# image_size, image_size)
# Encode context.
context, _ = encode_context(context_text_encoder,
context_image_encoder, context_encoder,
texts, text_lengths, images)
# (batch_size, context_vector_size)
intent_prob = intention(context)
# (batch_size, utterance_type_size)
intentions = torch.argmax(intent_prob, dim=1)
eqs = torch.eq(intentions, utter_types)
num_correct = torch.sum(eqs).item()
accuracy = num_correct * 1.0 / eqs.size(0)
sum_accuracy += accuracy
# Print.
print('pred:', intentions)
print('true:', utter_types)
print('# correct:', num_correct)
print('accuracy:', accuracy)
print('total accuracy:', sum_accuracy / (batch_id + 1))
def intention_train(context_text_encoder: TextEncoder,
context_image_encoder: ImageEncoder,
context_encoder: ContextEncoder, train_dataset: Dataset,
valid_dataset: Dataset, test_dataset: Dataset,
model_file: str):
"""Intention train.
Args:
context_text_encoder (TextEncoder): Context text encoder.
context_image_encoder (ImageEncoder): Context image encoder.
context_encoder (ContextEncoder): Context encoder.
train_dataset (Dataset): Train dataset.
valid_dataset (Dataset): Valid dataset.
test_dataset (Dataset): Test dataset.
model_file (str): Saved model file.
"""
# Data loader.
train_data_loader = DataLoader(
dataset=train_dataset,
batch_size=IntentionTrainConfig.batch_size,
shuffle=True,
num_workers=IntentionTrainConfig.num_data_loader_workers)
# Model.
intention_config = IntentionConfig()
intention = Intention(intention_config).to(GlobalConfig.device)
# Model parameters.
params = list(
chain.from_iterable([
list(model.parameters()) for model in [
context_text_encoder, context_image_encoder, context_encoder,
intention
]
]))
optimizer = Adam(params, lr=IntentionTrainConfig.learning_rate)
epoch_id = 0
min_valid_loss = None
# Load saved state.
if isfile(model_file):
state = torch.load(model_file)
intention.load_state_dict(state['intention'])
optimizer.load_state_dict(state['optimizer'])
epoch_id = state['epoch_id']
min_valid_loss = state['min_valid_loss']
# Loss.
sum_loss = 0
bad_loss_cnt = 0
# Switch to train mode.
context_text_encoder.train()
context_image_encoder.train()
context_encoder.train()
intention.train()
finished = False
for epoch_id in range(epoch_id, IntentionTrainConfig.num_iterations):
for batch_id, train_data in enumerate(train_data_loader):
# Sets gradients to 0.
optimizer.zero_grad()
texts, text_lengths, images, utter_types = train_data
# Sizes:
# texts: (batch_size, dialog_context_size + 1, dialog_text_max_len)
# text_lengths: (batch_size, dialog_context_size + 1)
# images: (batch_size, dialog_context_size + 1,
# pos_images_max_num, 3, image_size, image_size)
# utter_types: (batch_size, )
# To device.
texts = texts.to(GlobalConfig.device)
text_lengths = text_lengths.to(GlobalConfig.device)
images = images.to(GlobalConfig.device)
utter_types = utter_types.to(GlobalConfig.device)
texts.transpose_(0, 1)
# (dialog_context_size + 1, batch_size, dialog_text_max_len)
text_lengths.transpose_(0, 1)
# (dialog_context_size + 1, batch_size)
images.transpose_(0, 1)
images.transpose_(1, 2)
# (dialog_context_size + 1, pos_images_max_num, batch_size, 3,
# image_size, image_size)
# Encode context.
context, _ = encode_context(context_text_encoder,
context_image_encoder, context_encoder,
texts, text_lengths, images)
# (batch_size, context_vector_size)
intent_prob = intention(context)
# (batch_size, utterance_type_size)
loss = nll_loss(intent_prob, utter_types)
sum_loss += loss
loss.backward()
optimizer.step()
# Print loss every `TrainConfig.print_freq` batches.
if (batch_id + 1) % IntentionTrainConfig.print_freq == 0:
cur_time = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
sum_loss /= IntentionTrainConfig.print_freq
print('epoch: {} \tbatch: {} \tloss: {} \ttime: {}'.format(
epoch_id + 1, batch_id + 1, sum_loss, cur_time))
sum_loss = 0
# Valid every `TrainConfig.valid_freq` batches.
if (batch_id + 1) % IntentionTrainConfig.valid_freq == 0:
valid_loss, accuracy = intention_valid(context_text_encoder,
context_image_encoder,
context_encoder,
intention,
valid_dataset)
cur_time = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
print('valid_loss: {} \taccuracy: {} \ttime: {}'.format(
valid_loss, accuracy, cur_time))
# Save current best model.
if min_valid_loss is None or valid_loss < min_valid_loss:
min_valid_loss = valid_loss
bad_loss_cnt = 0
save_dict = {
'task': INTENTION_TASK,
'epoch_id': epoch_id,
'min_valid_loss': min_valid_loss,
'optimizer': optimizer.state_dict(),
'context_text_encoder':
context_text_encoder.state_dict(),
'context_image_encoder':
context_image_encoder.state_dict(),
'context_encoder': context_encoder.state_dict(),
'intention': intention.state_dict()
}
torch.save(save_dict, model_file)
print('Best model saved.')
else:
bad_loss_cnt += 1
if bad_loss_cnt > IntentionTrainConfig.patience:
intention_test(context_text_encoder,
context_image_encoder, context_encoder,
intention, test_dataset)
finished = True
break
if finished:
break
