def __call__(self, trainer):
encdec = trainer.updater.get_optimizer("main").target
log.info("computing %s" % self.observation_name)
dev_loss = compute_loss_all(encdec, self.data, self.eos_idx, self.mb_size,
gpu=self.gpu,
reverse_src=self.reverse_src, reverse_tgt=self.reverse_tgt,
use_chainerx=self.use_chainerx)
log.info("%s: %f (current best: %r)" % (self.observation_name, dev_loss, self.best_loss))
chainer.reporter.report({self.observation_name: dev_loss})
if self.best_loss is None or self.best_loss > dev_loss:
log.info("loss (%s) improvement: %r -> %r" % (self.observation_name,
self.best_loss, dev_loss))
self.best_loss = dev_loss
if self.save_best_model_to is not None:
log.info("saving best loss (%s) model to %s" % (self.observation_name, self.save_best_model_to,))
serializers.save_npz(self.save_best_model_to, encdec)
if self.config_training is not None:
config_session = self.config_training.copy(readonly=False)
config_session.add_section("model_parameters", keep_at_bottom="metadata")
config_session["model_parameters"]["filename"] = self.save_best_model_to
config_session["model_parameters"]["type"] = "model"
config_session["model_parameters"]["description"] = "best_loss"
config_session["model_parameters"]["infos"] = argument_parsing_tools.OrderedNamespace()
config_session["model_parameters"]["infos"]["loss"] = float(dev_loss)
config_session["model_parameters"]["infos"]["iteration"] = trainer.updater.iteration
config_session.set_metadata_modified_time()
config_session.save_to(self.save_best_model_to + ".config")
def __call__(self, trainer):
encdec = trainer.updater.get_optimizer("main").target
# translations_fn = output_files_dict["dev_translation_output"] #save_prefix + ".test.out"
# control_src_fn = output_files_dict["dev_src_output"] #save_prefix + ".test.src.out"
bleu_stats = translate_to_file(encdec,
self.eos_idx,
self.src_data,
self.mb_size,
self.tgt_indexer,
self.translations_fn,
test_references=self.references,
control_src_fn=self.control_src_fn,
src_indexer=self.src_indexer,
gpu=self.gpu,
nb_steps=50,
reverse_src=self.reverse_src,
reverse_tgt=self.reverse_tgt,
s_unk_tag=self.s_unk_tag,
t_unk_tag=self.t_unk_tag)
bleu = bleu_stats.bleu()
chainer.reporter.report({
self.observation_name: bleu,
self.observation_name + "_details": repr(bleu)
})
if self.best_bleu is None or self.best_bleu < bleu:
log.info("%s improvement: %r -> %r" %
(self.observation_name, self.best_bleu, bleu))
self.best_bleu = bleu
if self.save_best_model_to is not None:
log.info("saving best bleu (%s) model to %s" % (
self.observation_name,
self.save_best_model_to,
))
serializers.save_npz(self.save_best_model_to, encdec)
if self.config_training is not None:
config_session = self.config_training.copy(readonly=False)
config_session.add_section("model_parameters",
keep_at_bottom="metadata")
config_session["model_parameters"][
"filename"] = self.save_best_model_to
config_session["model_parameters"]["type"] = "model"
config_session["model_parameters"][
"description"] = "best_bleu"
config_session["model_parameters"][
"infos"] = argument_parsing_tools.OrderedNamespace()
config_session["model_parameters"]["infos"][
"bleu_stats"] = str(bleu_stats)
config_session["model_parameters"]["infos"][
"iteration"] = trainer.updater.iteration
config_session.set_metadata_modified_time()
config_session.save_to(self.save_best_model_to + ".config")
# json.dump(config_session, open(self.save_best_model_to + ".config",
# "w"), indent=2, separators=(',', ': '))
else:
log.info("no bleu (%s) improvement: %f >= %f" %
(self.observation_name, self.best_bleu, bleu))
def load_config_train(filename, readonly=True, no_error=False):
config = argument_parsing_tools.OrderedNamespace.load_from(filename)
if "metadata" not in config: # older config file
parse_option_orderer = get_parse_option_orderer()
config_training = parse_option_orderer.convert_args_to_ordered_dict(
config["command_line"], args_is_namespace=False)
convert_cell_string(config_training, no_error=no_error)
assert "data" not in config_training
config_training["data"] = argument_parsing_tools.OrderedNamespace()
config_training["data"]["data_fn"] = config["data"]
config_training["data"]["Vi"] = config["Vi"]
config_training["data"]["Vo"] = config["Vo"]
config_training["data"]["voc"] = config["voc"]
assert "metadata" not in config_training
config_training["metadata"] = argument_parsing_tools.OrderedNamespace()
config_training["metadata"]["config_version_num"] = 0.9
config_training["metadata"]["command_line"] = None
config_training["metadata"]["knmt_version"] = None
config = config_training
elif config["metadata"]["config_version_num"] != 1.0:
raise ValueError(
"The config version of %s is not supported by this version of the program"
% filename)
# Compatibility with intermediate verions of config file
if "data_prefix" in config and "data_prefix" not in config[
"training_management"]:
config["training_management"]["data_prefix"] = config["data_prefix"]
del config["data_prefix"]
if "train_prefix" in config and "train_prefix" not in config[
"training_management"]:
config["training_management"]["train_prefix"] = config["train_prefix"]
del config["train_prefix"]
if readonly:
config.set_readonly()
return config
def __call__(self, trainer):
log.info("Saving current trainer state to file %s" % self.save_to)
serializers.save_npz(self.save_to, trainer)
config_session = self.config_training.copy(readonly=False)
config_session.add_section("model_parameters", keep_at_bottom="metadata")
config_session["model_parameters"]["filename"] = self.save_to
config_session["model_parameters"]["type"] = "snapshot"
config_session["model_parameters"]["description"] = "checkpoint"
config_session["model_parameters"]["infos"] = argument_parsing_tools.OrderedNamespace()
config_session["model_parameters"]["infos"]["iteration"] = trainer.updater.iteration
config_session.set_metadata_modified_time()
config_session.save_to(self.save_to + ".config")
# json.dump(config_session, open(self.save_to + ".config", "w"), indent=2,
# separators=(',', ': '))
log.info("Saved trainer snapshot to file %s" % self.save_to)
def load_config_eval(filename, readonly=True):
config = argument_parsing_tools.OrderedNamespace.load_from(filename)
if "metadata" not in config: # older config file
parse_option_orderer = get_parse_option_orderer()
config_eval = parse_option_orderer.convert_args_to_ordered_dict(config, args_is_namespace=False)
assert "metadata" not in config_eval
config_eval["metadata"] = argument_parsing_tools.OrderedNamespace()
config_eval["metadata"]["config_version_num"] = 0.9
config_eval["metadata"]["command_line"] = None
config_eval["metadata"]["knmt_version"] = None
config = config_eval
elif config["metadata"]["config_version_num"] != 1.0:
raise ValueError("The config version of %s is not supported by this version of the program" % filename)
if readonly:
config.set_readonly()
return config
def train_on_data_chainer(
encdec,
optimizer,
training_data,
output_files_dict,
src_indexer,
tgt_indexer,
eos_idx,
config_training,
stop_trigger=None,
test_data=None,
dev_data=None,
valid_data=None,
):
output_dir = config_training.training_management.save_prefix
mb_size = config_training.training.mb_size
nb_of_batch_to_sort = config_training.training.nb_batch_to_sort
gpu = config_training.training_management.gpu
report_every = config_training.training_management.report_every
randomized = config_training.training.randomized_data
reverse_src = config_training.training.reverse_src
reverse_tgt = config_training.training.reverse_tgt
do_not_save_data_for_resuming = config_training.training_management.no_resume
noise_on_prev_word = config_training.training.noise_on_prev_word
curiculum_training = config_training.training.curiculum_training
use_previous_prediction = config_training.training.use_previous_prediction
no_report_or_save = config_training.training_management.no_report_or_save
use_memory_optimization = config_training.training_management.use_memory_optimization
sample_every = config_training.training_management.sample_every
use_reinf = config_training.training.use_reinf
save_ckpt_every = config_training.training_management.save_ckpt_every
trainer_snapshot = config_training.training_management.load_trainer_snapshot
save_initial_model_to = config_training.training_management.save_initial_model_to
reshuffle_every_epoch = config_training.training_management.reshuffle_every_epoch
use_soft_prediction_feedback = config_training.training.use_soft_prediction_feedback
use_gumbel_for_soft_predictions = config_training.training.use_gumbel_for_soft_predictions
temperature_for_soft_predictions = config_training.training.temperature_for_soft_predictions
generate_computation_graph = config_training.training_management.generate_computation_graph
dynamic_batching = config_training.training.get("dynamic_batching", False)
dynamic_batching_max_elems = config_training.training.get(
"dynamic_batching_max_elems", 10000)
dynamic_batching_nb_sent_to_sort = config_training.training.get(
"dynamic_batching_nb_sent_to_sort", 5000)
@chainer.training.make_extension()
def sample_extension(trainer):
encdec = trainer.updater.get_optimizer("main").target
iterator = trainer.updater.get_iterator("main")
mb_raw = iterator.peek()
def s_unk_tag(num, utag):
return "S_UNK_%i" % utag
def t_unk_tag(num, utag):
return "T_UNK_%i" % utag
try:
if encdec.encdec_type() == "ff":
src_seqs, tgt_seqs = zip(*mb_raw)
sample_once_ff(encdec,
src_seqs,
tgt_seqs,
src_indexer,
tgt_indexer,
max_nb=20,
s_unk_tag=s_unk_tag,
t_unk_tag=t_unk_tag)
else:
src_batch, tgt_batch, src_mask = make_batch_src_tgt(
mb_raw,
eos_idx=eos_idx,
padding_idx=0,
gpu=gpu,
need_arg_sort=False)
sample_once(encdec,
src_batch,
tgt_batch,
src_mask,
src_indexer,
tgt_indexer,
eos_idx,
max_nb=20,
s_unk_tag=s_unk_tag,
t_unk_tag=t_unk_tag)
except CudaException:
log.warn("CUDARuntimeError during sample. Skipping sample")
if dynamic_batching:
log.info("using dynamic matching with %i %i",
dynamic_batching_max_elems, dynamic_batching_nb_sent_to_sort)
iterator_training_data = DynamicLengthBasedSerialIterator(
training_data,
max_nb_elements=dynamic_batching_max_elems,
nb_sent_sort=dynamic_batching_nb_sent_to_sort,
sort_key=lambda x: len(x[1]),
repeat=True,
shuffle=reshuffle_every_epoch)
else:
iterator_training_data = LengthBasedSerialIterator(
training_data,
mb_size,
nb_of_batch_to_sort=nb_of_batch_to_sort,
sort_key=lambda x: len(x[0]),
repeat=True,
shuffle=reshuffle_every_epoch)
generate_loss_computation_graph_on_first_call = [
generate_computation_graph is not None
]
if encdec.encdec_type() == "ff":
def loss_func(src_seq, tgt_seq):
t0 = time.clock()
loss = encdec.compute_loss(src_seq, tgt_seq, reduce="no")
total_loss = F.sum(loss)
total_nb_predictions = sum(len(seq) + 1 for seq in tgt_seq)
avg_loss = total_loss / total_nb_predictions
t1 = time.clock()
chainer.reporter.report({"forward_time": t1 - t0})
chainer.reporter.report({"mb_loss": total_loss.data})
chainer.reporter.report(
{"mb_nb_predictions": total_nb_predictions})
chainer.reporter.report({"trg_loss": avg_loss.data})
log.info("batch infos: %i x [%i | %i]", len(src_seq),
max(len(s) for s in src_seq),
max(len(s) for s in tgt_seq))
if generate_loss_computation_graph_on_first_call[0]:
log.info("Writing loss computation graph to %s",
generate_computation_graph)
import chainer.computational_graph as c
g = c.build_computational_graph(
[avg_loss]
) #, variable_style=None, function_style=None, show_name=False )
with open(generate_computation_graph, 'w') as o:
o.write(g.dump())
generate_loss_computation_graph_on_first_call[0] = False
return avg_loss
def convert_mb(mb_raw, device):
return tuple(zip(*mb_raw))
else:
def loss_func(src_batch, tgt_batch, src_mask):
t0 = time.clock()
(total_loss, total_nb_predictions), attn = encdec(
src_batch,
tgt_batch,
src_mask,
raw_loss_info=True,
noise_on_prev_word=noise_on_prev_word,
use_previous_prediction=use_previous_prediction,
use_soft_prediction_feedback=use_soft_prediction_feedback,
use_gumbel_for_soft_predictions=use_gumbel_for_soft_predictions,
temperature_for_soft_predictions=
temperature_for_soft_predictions)
avg_loss = total_loss / total_nb_predictions
t1 = time.clock()
chainer.reporter.report({"forward_time": t1 - t0})
chainer.reporter.report({"mb_loss": total_loss.data})
chainer.reporter.report(
{"mb_nb_predictions": total_nb_predictions})
chainer.reporter.report({"trg_loss": avg_loss.data})
log.info("batch infos: %i x [%i | %i]", src_batch[0].data.shape[0],
len(src_batch), len(tgt_batch))
if generate_loss_computation_graph_on_first_call[0]:
log.info("Writing loss computation graph to %s",
generate_computation_graph)
import chainer.computational_graph as c
g = c.build_computational_graph([avg_loss])
with open(generate_computation_graph, 'w') as o:
o.write(g.dump())
generate_loss_computation_graph_on_first_call[0] = False
return avg_loss
def convert_mb(mb_raw, device):
return make_batch_src_tgt(mb_raw,
eos_idx=eos_idx,
padding_idx=0,
gpu=device,
need_arg_sort=False)
updater = Updater(
iterator_training_data,
optimizer,
converter=convert_mb,
# iterator_training_data = chainer.iterators.SerialIterator(training_data, mb_size,
# repeat = True,
# shuffle = reshuffle_every_epoch)
device=gpu,
loss_func=loss_func,
need_to_convert_to_variables=False)
trainer = chainer.training.Trainer(updater, stop_trigger, out=output_dir)
# trainer.extend(chainer.training.extensions.LogReport(trigger=(10, 'iteration')))
# trainer.extend(chainer.training.extensions.PrintReport(['epoch', 'iteration', 'trg_loss', "dev_loss", "dev_bleu"]),
# trigger = (1, "iteration"))
if dev_data is not None and not no_report_or_save:
dev_loss_extension = ComputeLossExtension(
dev_data,
eos_idx,
mb_size,
gpu,
reverse_src,
reverse_tgt,
save_best_model_to=output_files_dict["model_best_loss"],
observation_name="dev_loss",
config_training=config_training)
trainer.extend(dev_loss_extension, trigger=(report_every, "iteration"))
dev_bleu_extension = ComputeBleuExtension(
dev_data,
eos_idx,
src_indexer,
tgt_indexer,
output_files_dict["dev_translation_output"],
output_files_dict["dev_src_output"],
mb_size,
gpu,
reverse_src,
reverse_tgt,
save_best_model_to=output_files_dict["model_best"],
observation_name="dev_bleu",
config_training=config_training)
trainer.extend(dev_bleu_extension, trigger=(report_every, "iteration"))
if test_data is not None and not no_report_or_save:
test_loss_extension = ComputeLossExtension(
test_data,
eos_idx,
mb_size,
gpu,
reverse_src,
reverse_tgt,
observation_name="test_loss")
trainer.extend(test_loss_extension,
trigger=(report_every, "iteration"))
test_bleu_extension = ComputeBleuExtension(
test_data,
eos_idx,
src_indexer,
tgt_indexer,
output_files_dict["test_translation_output"],
output_files_dict["test_src_output"],
mb_size,
gpu,
reverse_src,
reverse_tgt,
observation_name="test_bleu")
trainer.extend(test_bleu_extension,
trigger=(report_every, "iteration"))
if not no_report_or_save:
trainer.extend(sample_extension, trigger=(sample_every, "iteration"))
# trainer.extend(chainer.training.extensions.snapshot(), trigger = (save_ckpt_every, "iteration"))
trainer.extend(CheckpontSavingExtension(
output_files_dict["model_ckpt"], config_training),
trigger=(save_ckpt_every, "iteration"))
trainer.extend(
SqliteLogExtension(db_path=output_files_dict["sqlite_db"]))
trainer.extend(
TrainingLossSummaryExtension(trigger=(report_every, "iteration")))
if config_training.training_management.resume:
if "model_parameters" not in config_training:
log.error("cannot find model parameters in config file")
raise ValueError(
"Config file do not contain model_parameters section")
if config_training.model_parameters.type == "snapshot":
model_filename = config_training.model_parameters.filename
log.info("resuming from trainer parameters %s" % model_filename)
serializers.load_npz(model_filename, trainer)
if trainer_snapshot is not None:
log.info("loading trainer parameters from %s" % trainer_snapshot)
serializers.load_npz(trainer_snapshot, trainer)
try:
if save_initial_model_to is not None:
log.info("Saving initial parameters to %s" % save_initial_model_to)
encdec = trainer.updater.get_optimizer("main").target
serializers.save_npz(save_initial_model_to, encdec)
trainer.run()
except BaseException:
if not no_report_or_save:
final_snapshot_fn = output_files_dict["model_final"]
log.info(
"Exception met. Trying to save current trainer state to file %s"
% final_snapshot_fn)
serializers.save_npz(final_snapshot_fn, trainer)
# chainer.training.extensions.snapshot(filename = final_snapshot_fn)(trainer)
config_session = config_training.copy(readonly=False)
config_session.add_section("model_parameters",
keep_at_bottom="metadata")
config_session["model_parameters"]["filename"] = final_snapshot_fn
config_session["model_parameters"]["type"] = "snapshot"
config_session["model_parameters"]["description"] = "final"
config_session["model_parameters"][
"infos"] = argument_parsing_tools.OrderedNamespace()
config_session["model_parameters"]["infos"][
"iteration"] = trainer.updater.iteration
config_session.set_metadata_modified_time()
config_session.save_to(final_snapshot_fn + ".config")
# json.dump(config_session, open(final_snapshot_fn + ".config", "w"),
# indent=2, separators=(',', ': '))
log.info("Saved trainer snapshot to file %s" % final_snapshot_fn)
raise
def train_on_data_chainer(
encdec,
optimizer,
training_data,
output_files_dict,
src_indexer,
tgt_indexer,
eos_idx,
config_training,
stop_trigger=None,
test_data=None,
dev_data=None,
valid_data=None,
):
output_dir = config_training.training_management.save_prefix
mb_size = config_training.training.mb_size
nb_of_batch_to_sort = config_training.training.nb_batch_to_sort
gpu = config_training.training_management.gpu
report_every = config_training.training_management.report_every
randomized = config_training.training.randomized_data
reverse_src = config_training.training.reverse_src
reverse_tgt = config_training.training.reverse_tgt
do_not_save_data_for_resuming = config_training.training_management.no_resume
noise_on_prev_word = config_training.training.noise_on_prev_word
curiculum_training = config_training.training.curiculum_training
use_previous_prediction = config_training.training.use_previous_prediction
no_report_or_save = config_training.training_management.no_report_or_save
use_memory_optimization = config_training.training_management.use_memory_optimization
sample_every = config_training.training_management.sample_every
use_reinf = config_training.training.use_reinf
save_ckpt_every = config_training.training_management.save_ckpt_every
trainer_snapshot = config_training.training_management.load_trainer_snapshot
save_initial_model_to = config_training.training_management.save_initial_model_to
reshuffle_every_epoch = config_training.training_management.reshuffle_every_epoch
use_soft_prediction_feedback = config_training.training.use_soft_prediction_feedback
use_gumbel_for_soft_predictions = config_training.training.use_gumbel_for_soft_predictions
temperature_for_soft_predictions = config_training.training.temperature_for_soft_predictions
@chainer.training.make_extension()
def sample_extension(trainer):
encdec = trainer.updater.get_optimizer("main").target
iterator = trainer.updater.get_iterator("main")
mb_raw = iterator.peek()
src_batch, tgt_batch, src_mask = make_batch_src_tgt(
mb_raw,
eos_idx=eos_idx,
padding_idx=0,
gpu=gpu,
volatile="on",
need_arg_sort=False)
def s_unk_tag(num, utag):
return "S_UNK_%i" % utag
def t_unk_tag(num, utag):
return "T_UNK_%i" % utag
sample_once(encdec,
src_batch,
tgt_batch,
src_mask,
src_indexer,
tgt_indexer,
eos_idx,
max_nb=20,
s_unk_tag=s_unk_tag,
t_unk_tag=t_unk_tag)
iterator_training_data = LengthBasedSerialIterator(
training_data,
mb_size,
nb_of_batch_to_sort=nb_of_batch_to_sort,
sort_key=lambda x: len(x[0]),
repeat=True,
shuffle=reshuffle_every_epoch)
def loss_func(src_batch, tgt_batch, src_mask):
t0 = time.clock()
(total_loss, total_nb_predictions), attn = encdec(
src_batch,
tgt_batch,
src_mask,
raw_loss_info=True,
noise_on_prev_word=noise_on_prev_word,
use_previous_prediction=use_previous_prediction,
mode="train",
use_soft_prediction_feedback=use_soft_prediction_feedback,
use_gumbel_for_soft_predictions=use_gumbel_for_soft_predictions,
temperature_for_soft_predictions=temperature_for_soft_predictions)
avg_loss = total_loss / total_nb_predictions
t1 = time.clock()
chainer.reporter.report({"forward_time": t1 - t0})
chainer.reporter.report({"mb_loss": total_loss.data})
chainer.reporter.report({"mb_nb_predictions": total_nb_predictions})
chainer.reporter.report({"trg_loss": avg_loss.data})
return avg_loss
def convert_mb(mb_raw, device):
return make_batch_src_tgt(mb_raw,
eos_idx=eos_idx,
padding_idx=0,
gpu=device,
volatile="off",
need_arg_sort=False)
updater = Updater(
iterator_training_data,
optimizer,
converter=convert_mb,
# iterator_training_data = chainer.iterators.SerialIterator(training_data, mb_size,
# repeat = True,
# shuffle = reshuffle_every_epoch)
device=gpu,
loss_func=loss_func,
need_to_convert_to_variables=False)
trainer = chainer.training.Trainer(updater, stop_trigger, out=output_dir)
# trainer.extend(chainer.training.extensions.LogReport(trigger=(10, 'iteration')))
# trainer.extend(chainer.training.extensions.PrintReport(['epoch', 'iteration', 'trg_loss', "dev_loss", "dev_bleu"]),
# trigger = (1, "iteration"))
if dev_data is not None and not no_report_or_save:
dev_loss_extension = ComputeLossExtension(
dev_data,
eos_idx,
mb_size,
gpu,
reverse_src,
reverse_tgt,
save_best_model_to=output_files_dict["model_best_loss"],
observation_name="dev_loss",
config_training=config_training)
trainer.extend(dev_loss_extension, trigger=(report_every, "iteration"))
dev_bleu_extension = ComputeBleuExtension(
dev_data,
eos_idx,
src_indexer,
tgt_indexer,
output_files_dict["dev_translation_output"],
output_files_dict["dev_src_output"],
mb_size,
gpu,
reverse_src,
reverse_tgt,
save_best_model_to=output_files_dict["model_best"],
observation_name="dev_bleu",
config_training=config_training)
trainer.extend(dev_bleu_extension, trigger=(report_every, "iteration"))
if test_data is not None and not no_report_or_save:
test_loss_extension = ComputeLossExtension(
test_data,
eos_idx,
mb_size,
gpu,
reverse_src,
reverse_tgt,
observation_name="test_loss")
trainer.extend(test_loss_extension,
trigger=(report_every, "iteration"))
test_bleu_extension = ComputeBleuExtension(
test_data,
eos_idx,
src_indexer,
tgt_indexer,
output_files_dict["test_translation_output"],
output_files_dict["test_src_output"],
mb_size,
gpu,
reverse_src,
reverse_tgt,
observation_name="test_bleu")
trainer.extend(test_bleu_extension,
trigger=(report_every, "iteration"))
if not no_report_or_save:
trainer.extend(sample_extension, trigger=(sample_every, "iteration"))
# trainer.extend(chainer.training.extensions.snapshot(), trigger = (save_ckpt_every, "iteration"))
trainer.extend(CheckpontSavingExtension(
output_files_dict["model_ckpt"], config_training),
trigger=(save_ckpt_every, "iteration"))
trainer.extend(
SqliteLogExtension(db_path=output_files_dict["sqlite_db"]))
trainer.extend(
TrainingLossSummaryExtension(trigger=(report_every, "iteration")))
if config_training.training_management.resume:
if "model_parameters" not in config_training:
log.error("cannot find model parameters in config file")
raise ValueError(
"Config file do not contain model_parameters section")
if config_training.model_parameters.type == "snapshot":
model_filename = config_training.model_parameters.filename
log.info("resuming from trainer parameters %s" % model_filename)
serializers.load_npz(model_filename, trainer)
if trainer_snapshot is not None:
log.info("loading trainer parameters from %s" % trainer_snapshot)
serializers.load_npz(trainer_snapshot, trainer)
try:
if save_initial_model_to is not None:
log.info("Saving initial parameters to %s" % save_initial_model_to)
encdec = trainer.updater.get_optimizer("main").target
serializers.save_npz(save_initial_model_to, encdec)
trainer.run()
except BaseException:
if not no_report_or_save:
final_snapshot_fn = output_files_dict["model_final"]
log.info(
"Exception met. Trying to save current trainer state to file %s"
% final_snapshot_fn)
serializers.save_npz(final_snapshot_fn, trainer)
# chainer.training.extensions.snapshot(filename = final_snapshot_fn)(trainer)
config_session = config_training.copy(readonly=False)
config_session.add_section("model_parameters",
keep_at_bottom="metadata")
config_session["model_parameters"]["filename"] = final_snapshot_fn
config_session["model_parameters"]["type"] = "snapshot"
config_session["model_parameters"]["description"] = "final"
config_session["model_parameters"][
"infos"] = argument_parsing_tools.OrderedNamespace()
config_session["model_parameters"]["infos"][
"iteration"] = trainer.updater.iteration
config_session.set_metadata_modified_time()
config_session.save_to(final_snapshot_fn + ".config")
# json.dump(config_session, open(final_snapshot_fn + ".config", "w"),
# indent=2, separators=(',', ': '))
log.info("Saved trainer snapshot to file %s" % final_snapshot_fn)
raise