def init_model(
FLAGS,
logger,
initial_embeddings,
vocab_size,
num_classes,
data_manager,
logfile_header=None):
# Choose model.
logger.Log("Building model.")
if FLAGS.model_type == "CBOW":
build_model = spinn.cbow.build_model
elif FLAGS.model_type == "RNN":
build_model = spinn.plain_rnn.build_model
elif FLAGS.model_type == "SPINN":
build_model = spinn.spinn_core_model.build_model
elif FLAGS.model_type == "RLSPINN":
build_model = spinn.rl_spinn.build_model
elif FLAGS.model_type == "ChoiPyramid":
build_model = spinn.choi_pyramid.build_model
elif FLAGS.model_type == "Maillard":
build_model = spinn.maillard_pyramid.build_model
elif FLAGS.model_type == "LMS":
build_model = spinn.lms.build_model
else:
raise NotImplementedError
# Input Encoder.
context_args = Args()
if FLAGS.model_type == "LMS":
intermediate_dim = FLAGS.model_dim * FLAGS.model_dim
else:
intermediate_dim = FLAGS.model_dim
if FLAGS.encode == "projection":
context_args.reshape_input = lambda x, batch_size, seq_length: x
context_args.reshape_context = lambda x, batch_size, seq_length: x
encoder = Linear()(FLAGS.word_embedding_dim, intermediate_dim)
context_args.input_dim = intermediate_dim
elif FLAGS.encode == "gru":
context_args.reshape_input = lambda x, batch_size, seq_length: x.view(
batch_size, seq_length, -1)
context_args.reshape_context = lambda x, batch_size, seq_length: x.view(
batch_size * seq_length, -1)
context_args.input_dim = intermediate_dim
encoder = EncodeGRU(FLAGS.word_embedding_dim, intermediate_dim,
num_layers=FLAGS.encode_num_layers,
bidirectional=FLAGS.encode_bidirectional,
reverse=FLAGS.encode_reverse,
mix=(FLAGS.model_type != "CBOW"))
elif FLAGS.encode == "attn":
context_args.reshape_input = lambda x, batch_size, seq_length: x.view(
batch_size, seq_length, -1)
context_args.reshape_context = lambda x, batch_size, seq_length: x.view(
batch_size * seq_length, -1)
context_args.input_dim = intermediate_dim
encoder = IntraAttention(FLAGS.word_embedding_dim, intermediate_dim)
elif FLAGS.encode == "pass":
context_args.reshape_input = lambda x, batch_size, seq_length: x
context_args.reshape_context = lambda x, batch_size, seq_length: x
context_args.input_dim = FLAGS.word_embedding_dim
def encoder(x): return x
else:
raise NotImplementedError
context_args.encoder = encoder
# Composition Function.
composition_args = Args()
composition_args.lateral_tracking = FLAGS.lateral_tracking
composition_args.tracking_ln = FLAGS.tracking_ln
composition_args.use_tracking_in_composition = FLAGS.use_tracking_in_composition
composition_args.size = FLAGS.model_dim
composition_args.tracker_size = FLAGS.tracking_lstm_hidden_dim
composition_args.use_internal_parser = FLAGS.use_internal_parser
composition_args.transition_weight = FLAGS.transition_weight
composition_args.wrap_items = lambda x: torch.cat(x, 0)
composition_args.extract_h = lambda x: x
if FLAGS.reduce == "treelstm":
assert FLAGS.model_dim % 2 == 0, 'model_dim must be an even number.'
assert FLAGS.model_type != 'LMS', 'Must use reduce=lms for LMS.'
if FLAGS.model_dim != FLAGS.word_embedding_dim:
print('If you are setting different hidden layer and word '
'embedding sizes, make sure you specify an encoder')
composition_args.wrap_items = lambda x: bundle(x)
composition_args.extract_h = lambda x: x.h
composition_args.extract_c = lambda x: x.c
composition_args.size = FLAGS.model_dim // 2
composition = ReduceTreeLSTM(
FLAGS.model_dim // 2,
tracker_size=FLAGS.tracking_lstm_hidden_dim,
use_tracking_in_composition=FLAGS.use_tracking_in_composition,
composition_ln=FLAGS.composition_ln)
elif FLAGS.reduce == "tanh":
class ReduceTanh(nn.Module):
def forward(self, lefts, rights, tracking=None):
batch_size = len(lefts)
ret = torch.cat(lefts, 0) + F.tanh(torch.cat(rights, 0))
return torch.chunk(ret, batch_size, 0)
composition = ReduceTanh()
elif FLAGS.reduce == "treegru":
composition = ReduceTreeGRU(FLAGS.model_dim,
FLAGS.tracking_lstm_hidden_dim,
FLAGS.use_tracking_in_composition)
elif FLAGS.reduce == "lms":
composition_args.wrap_items = lambda x: bundle(x)
composition_args.extract_h = lambda x: x.h
composition_args.extract_c = lambda x: x.c
composition_args.size = FLAGS.model_dim
composition = ReduceTensor(FLAGS.model_dim)
else:
raise NotImplementedError
composition_args.composition = composition
model = build_model(data_manager, initial_embeddings, vocab_size,
num_classes, FLAGS, context_args, composition_args)
# Debug
def set_debug(self):
self.debug = FLAGS.debug
model.apply(set_debug)
# Print model size.
logger.Log("Architecture: {}".format(model))
if logfile_header:
logfile_header.model_architecture = str(model)
total_params = sum([reduce(lambda x, y: x * y, w.size(), 1.0)
for w in model.parameters()])
logger.Log("Total params: {}".format(total_params))
if logfile_header:
logfile_header.total_params = int(total_params)
return model
def init_model(
FLAGS,
logger,
initial_embeddings,
vocab_size,
num_classes,
data_manager,
logfile_header=None):
# Choose model.
logger.Log("Building model.")
if FLAGS.model_type == "CBOW":
build_model = spinn.cbow.build_model
elif FLAGS.model_type == "RNN":
build_model = spinn.plain_rnn.build_model
elif FLAGS.model_type == "SPINN":
build_model = spinn.spinn_core_model.build_model
elif FLAGS.model_type == "RLSPINN":
build_model = spinn.rl_spinn.build_model
elif FLAGS.model_type == "Pyramid":
build_model = spinn.pyramid.build_model
else:
raise NotImplementedError
# Input Encoder.
context_args = Args()
context_args.reshape_input = lambda x, batch_size, seq_length: x
context_args.reshape_context = lambda x, batch_size, seq_length: x
context_args.input_dim = FLAGS.word_embedding_dim
if FLAGS.encode == "projection":
encoder = Linear()(FLAGS.word_embedding_dim, FLAGS.model_dim)
elif FLAGS.encode == "gru":
context_args.reshape_input = lambda x, batch_size, seq_length: x.view(
batch_size, seq_length, -1)
context_args.reshape_context = lambda x, batch_size, seq_length: x.view(
batch_size * seq_length, -1)
context_args.input_dim = FLAGS.model_dim
encoder = EncodeGRU(FLAGS.word_embedding_dim, FLAGS.model_dim,
num_layers=FLAGS.encode_num_layers,
bidirectional=FLAGS.encode_bidirectional,
reverse=FLAGS.encode_reverse)
elif FLAGS.encode == "attn":
context_args.reshape_input = lambda x, batch_size, seq_length: x.view(
batch_size, seq_length, -1)
context_args.reshape_context = lambda x, batch_size, seq_length: x.view(
batch_size * seq_length, -1)
context_args.input_dim = FLAGS.model_dim
encoder = IntraAttention(FLAGS.word_embedding_dim, FLAGS.model_dim)
elif FLAGS.encode == "pass":
def encoder(x): return x
else:
raise NotImplementedError
context_args.encoder = encoder
# Composition Function.
composition_args = Args()
composition_args.lateral_tracking = FLAGS.lateral_tracking
composition_args.tracking_ln = FLAGS.tracking_ln
composition_args.use_tracking_in_composition = FLAGS.use_tracking_in_composition
composition_args.size = FLAGS.model_dim
composition_args.tracker_size = FLAGS.tracking_lstm_hidden_dim
composition_args.use_internal_parser = FLAGS.use_internal_parser
composition_args.transition_weight = FLAGS.transition_weight
composition_args.wrap_items = lambda x: torch.cat(x, 0)
composition_args.extract_h = lambda x: x
composition_args.extract_c = None
composition_args.detach = FLAGS.transition_detach
composition_args.evolution = FLAGS.evolution
if FLAGS.reduce == "treelstm":
assert FLAGS.model_dim % 2 == 0, 'model_dim must be an even number.'
if FLAGS.model_dim != FLAGS.word_embedding_dim:
print('If you are setting different hidden layer and word '
'embedding sizes, make sure you specify an encoder')
composition_args.wrap_items = lambda x: bundle(x)
composition_args.extract_h = lambda x: x.h
composition_args.extract_c = lambda x: x.c
composition_args.size = FLAGS.model_dim / 2
composition = ReduceTreeLSTM(FLAGS.model_dim / 2,
tracker_size=FLAGS.tracking_lstm_hidden_dim,
use_tracking_in_composition=FLAGS.use_tracking_in_composition,
composition_ln=FLAGS.composition_ln)
elif FLAGS.reduce == "tanh":
class ReduceTanh(nn.Module):
def forward(self, lefts, rights, tracking=None):
batch_size = len(lefts)
ret = torch.cat(lefts, 0) + F.tanh(torch.cat(rights, 0))
return torch.chunk(ret, batch_size, 0)
composition = ReduceTanh()
elif FLAGS.reduce == "treegru":
composition = ReduceTreeGRU(FLAGS.model_dim,
FLAGS.tracking_lstm_hidden_dim,
FLAGS.use_tracking_in_composition)
else:
raise NotImplementedError
composition_args.composition = composition
model = build_model(data_manager, initial_embeddings, vocab_size,
num_classes, FLAGS, context_args, composition_args)
# Build optimizer.
if FLAGS.optimizer_type == "Adam":
optimizer = optim.Adam(model.parameters(), lr=FLAGS.learning_rate,
betas=(0.9, 0.999), eps=1e-08)
elif FLAGS.optimizer_type == "RMSprop":
optimizer = optim.RMSprop(model.parameters(), lr=FLAGS.learning_rate, eps=1e-08)
else:
raise NotImplementedError
# Build trainer.
if FLAGS.evolution:
trainer = ModelTrainer_ES(model, optimizer)
else:
trainer = ModelTrainer(model, optimizer)
# Print model size.
logger.Log("Architecture: {}".format(model))
if logfile_header:
logfile_header.model_architecture = str(model)
total_params = sum([reduce(lambda x, y: x * y, w.size(), 1.0) for w in model.parameters()])
logger.Log("Total params: {}".format(total_params))
if logfile_header:
logfile_header.total_params = int(total_params)
return model, optimizer, trainer