def test_no_constructor(self):
params = Params({"type": "just_spaces"})
Tokenizer.from_params(params)
def from_params(cls, params):
tokenizer = Tokenizer.from_params(params.pop("tokenizer"))
ret = TokenCharactersIndexer.from_params(params)
ret._character_tokenizer = tokenizer
return ret
def train_model(db: FeverDocDB, params: Union[Params, Dict[str, Any]],
cuda_device: int, serialization_dir: str) -> Model:
"""
This function can be used as an entry point to running models in AllenNLP
directly from a JSON specification using a :class:`Driver`. Note that if
you care about reproducibility, you should avoid running code using Pytorch
or numpy which affect the reproducibility of your experiment before you
import and use this function, these libraries rely on random seeds which
can be set in this function via a JSON specification file. Note that this
function performs training and will also evaluate the trained model on
development and test sets if provided in the parameter json.
Parameters
----------
params: Params, required.
A parameter object specifying an AllenNLP Experiment.
serialization_dir: str, required
The directory in which to save results and logs.
"""
prepare_environment(params)
os.makedirs(serialization_dir, exist_ok=True)
sys.stdout = TeeLogger(os.path.join(serialization_dir, "stdout.log"),
sys.stdout) # type: ignore
sys.stderr = TeeLogger(os.path.join(serialization_dir, "stderr.log"),
sys.stderr) # type: ignore
handler = logging.FileHandler(
os.path.join(serialization_dir, "python_logging.log"))
handler.setLevel(logging.INFO)
handler.setFormatter(
logging.Formatter(
'%(asctime)s - %(levelname)s - %(name)s - %(message)s'))
logging.getLogger().addHandler(handler)
serialization_params = deepcopy(params).as_dict(quiet=True)
with open(os.path.join(serialization_dir, "model_params.json"),
"w") as param_file:
json.dump(serialization_params, param_file, indent=4)
# Now we begin assembling the required parts for the Trainer.
ds_params = params.pop('dataset_reader', {})
dataset_reader = FEVERSentenceReader(
db,
wiki_tokenizer=Tokenizer.from_params(
ds_params.pop('wiki_tokenizer', {})),
claim_tokenizer=Tokenizer.from_params(
ds_params.pop('claim_tokenizer', {})),
token_indexers=TokenIndexer.dict_from_params(
ds_params.pop('token_indexers', {})))
train_data_path = params.pop('train_data_path')
logger.info("Reading training data from %s", train_data_path)
train_data = dataset_reader.read(train_data_path)
all_datasets: List[Dataset] = [train_data]
datasets_in_vocab = ["train"]
validation_data_path = params.pop('validation_data_path', None)
if validation_data_path is not None:
logger.info("Reading validation data from %s", validation_data_path)
validation_data = dataset_reader.read(validation_data_path)
all_datasets.append(validation_data)
datasets_in_vocab.append("validation")
else:
validation_data = None
logger.info("Creating a vocabulary using %s data.",
", ".join(datasets_in_vocab))
vocab = Vocabulary.from_params(
params.pop("vocabulary", {}),
Dataset([
instance for dataset in all_datasets
for instance in dataset.instances
]))
vocab.save_to_files(os.path.join(serialization_dir, "vocabulary"))
model = Model.from_params(vocab, params.pop('model'))
iterator = DataIterator.from_params(params.pop("iterator"))
train_data.index_instances(vocab)
if validation_data:
validation_data.index_instances(vocab)
trainer_params = params.pop("trainer")
if cuda_device is not None:
args.trainer_params["cuda_device"] = cuda_device
trainer = Trainer.from_params(model, serialization_dir, iterator,
train_data, validation_data, trainer_params)
trainer.train()
# Now tar up results
archive_model(serialization_dir)
return model