mirror of https://github.com/explosion/spaCy.git
497 lines
19 KiB
Python
497 lines
19 KiB
Python
# coding: utf8
|
|
from __future__ import unicode_literals, division, print_function
|
|
|
|
import plac
|
|
import os
|
|
from pathlib import Path
|
|
import tqdm
|
|
from thinc.neural._classes.model import Model
|
|
from timeit import default_timer as timer
|
|
import shutil
|
|
import srsly
|
|
from wasabi import Printer
|
|
import contextlib
|
|
import random
|
|
|
|
from .._ml import create_default_optimizer
|
|
from ..attrs import PROB, IS_OOV, CLUSTER, LANG
|
|
from ..gold import GoldCorpus
|
|
from .. import util
|
|
from .. import about
|
|
|
|
|
|
@plac.annotations(
|
|
lang=("Model language", "positional", None, str),
|
|
output_path=("Output directory to store model in", "positional", None, Path),
|
|
train_path=("Location of JSON-formatted training data", "positional", None, Path),
|
|
dev_path=("Location of JSON-formatted development data", "positional", None, Path),
|
|
raw_text=(
|
|
"Path to jsonl file with unlabelled text documents.",
|
|
"option",
|
|
"rt",
|
|
Path,
|
|
),
|
|
base_model=("Name of model to update (optional)", "option", "b", str),
|
|
pipeline=("Comma-separated names of pipeline components", "option", "p", str),
|
|
vectors=("Model to load vectors from", "option", "v", str),
|
|
n_iter=("Number of iterations", "option", "n", int),
|
|
n_early_stopping=(
|
|
"Maximum number of training epochs without dev accuracy improvement",
|
|
"option",
|
|
"ne",
|
|
int,
|
|
),
|
|
n_examples=("Number of examples", "option", "ns", int),
|
|
use_gpu=("Use GPU", "option", "g", int),
|
|
version=("Model version", "option", "V", str),
|
|
meta_path=("Optional path to meta.json to use as base.", "option", "m", Path),
|
|
init_tok2vec=(
|
|
"Path to pretrained weights for the token-to-vector parts of the models. See 'spacy pretrain'. Experimental.",
|
|
"option",
|
|
"t2v",
|
|
Path,
|
|
),
|
|
parser_multitasks=(
|
|
"Side objectives for parser CNN, e.g. 'dep' or 'dep,tag'",
|
|
"option",
|
|
"pt",
|
|
str,
|
|
),
|
|
entity_multitasks=(
|
|
"Side objectives for NER CNN, e.g. 'dep' or 'dep,tag'",
|
|
"option",
|
|
"et",
|
|
str,
|
|
),
|
|
noise_level=("Amount of corruption for data augmentation", "option", "nl", float),
|
|
eval_beam_widths=("Beam widths to evaluate, e.g. 4,8", "option", "bw", str),
|
|
gold_preproc=("Use gold preprocessing", "flag", "G", bool),
|
|
learn_tokens=("Make parser learn gold-standard tokenization", "flag", "T", bool),
|
|
verbose=("Display more information for debug", "flag", "VV", bool),
|
|
debug=("Run data diagnostics before training", "flag", "D", bool),
|
|
)
|
|
def train(
|
|
lang,
|
|
output_path,
|
|
train_path,
|
|
dev_path,
|
|
raw_text=None,
|
|
base_model=None,
|
|
pipeline="tagger,parser,ner",
|
|
vectors=None,
|
|
n_iter=30,
|
|
n_early_stopping=None,
|
|
n_examples=0,
|
|
use_gpu=-1,
|
|
version="0.0.0",
|
|
meta_path=None,
|
|
init_tok2vec=None,
|
|
parser_multitasks="",
|
|
entity_multitasks="",
|
|
noise_level=0.0,
|
|
eval_beam_widths="",
|
|
gold_preproc=False,
|
|
learn_tokens=False,
|
|
verbose=False,
|
|
debug=False,
|
|
):
|
|
"""
|
|
Train or update a spaCy model. Requires data to be formatted in spaCy's
|
|
JSON format. To convert data from other formats, use the `spacy convert`
|
|
command.
|
|
"""
|
|
msg = Printer()
|
|
util.fix_random_seed()
|
|
util.set_env_log(verbose)
|
|
|
|
# Make sure all files and paths exists if they are needed
|
|
train_path = util.ensure_path(train_path)
|
|
dev_path = util.ensure_path(dev_path)
|
|
meta_path = util.ensure_path(meta_path)
|
|
output_path = util.ensure_path(output_path)
|
|
if raw_text is not None:
|
|
raw_text = list(srsly.read_jsonl(raw_text))
|
|
if not train_path or not train_path.exists():
|
|
msg.fail("Training data not found", train_path, exits=1)
|
|
if not dev_path or not dev_path.exists():
|
|
msg.fail("Development data not found", dev_path, exits=1)
|
|
if meta_path is not None and not meta_path.exists():
|
|
msg.fail("Can't find model meta.json", meta_path, exits=1)
|
|
meta = srsly.read_json(meta_path) if meta_path else {}
|
|
if output_path.exists() and [p for p in output_path.iterdir() if p.is_dir()]:
|
|
msg.warn(
|
|
"Output directory is not empty",
|
|
"This can lead to unintended side effects when saving the model. "
|
|
"Please use an empty directory or a different path instead. If "
|
|
"the specified output path doesn't exist, the directory will be "
|
|
"created for you.",
|
|
)
|
|
if not output_path.exists():
|
|
output_path.mkdir()
|
|
|
|
# Take dropout and batch size as generators of values -- dropout
|
|
# starts high and decays sharply, to force the optimizer to explore.
|
|
# Batch size starts at 1 and grows, so that we make updates quickly
|
|
# at the beginning of training.
|
|
dropout_rates = util.decaying(
|
|
util.env_opt("dropout_from", 0.2),
|
|
util.env_opt("dropout_to", 0.2),
|
|
util.env_opt("dropout_decay", 0.0),
|
|
)
|
|
batch_sizes = util.compounding(
|
|
util.env_opt("batch_from", 100.0),
|
|
util.env_opt("batch_to", 1000.0),
|
|
util.env_opt("batch_compound", 1.001),
|
|
)
|
|
|
|
if not eval_beam_widths:
|
|
eval_beam_widths = [1]
|
|
else:
|
|
eval_beam_widths = [int(bw) for bw in eval_beam_widths.split(",")]
|
|
if 1 not in eval_beam_widths:
|
|
eval_beam_widths.append(1)
|
|
eval_beam_widths.sort()
|
|
has_beam_widths = eval_beam_widths != [1]
|
|
|
|
# Set up the base model and pipeline. If a base model is specified, load
|
|
# the model and make sure the pipeline matches the pipeline setting. If
|
|
# training starts from a blank model, intitalize the language class.
|
|
pipeline = [p.strip() for p in pipeline.split(",")]
|
|
msg.text("Training pipeline: {}".format(pipeline))
|
|
if base_model:
|
|
msg.text("Starting with base model '{}'".format(base_model))
|
|
nlp = util.load_model(base_model)
|
|
if nlp.lang != lang:
|
|
msg.fail(
|
|
"Model language ('{}') doesn't match language specified as "
|
|
"`lang` argument ('{}') ".format(nlp.lang, lang),
|
|
exits=1,
|
|
)
|
|
other_pipes = [pipe for pipe in nlp.pipe_names if pipe not in pipeline]
|
|
nlp.disable_pipes(*other_pipes)
|
|
for pipe in pipeline:
|
|
if pipe not in nlp.pipe_names:
|
|
nlp.add_pipe(nlp.create_pipe(pipe))
|
|
else:
|
|
msg.text("Starting with blank model '{}'".format(lang))
|
|
lang_cls = util.get_lang_class(lang)
|
|
nlp = lang_cls()
|
|
for pipe in pipeline:
|
|
nlp.add_pipe(nlp.create_pipe(pipe))
|
|
|
|
if learn_tokens:
|
|
nlp.add_pipe(nlp.create_pipe("merge_subtokens"))
|
|
|
|
if vectors:
|
|
msg.text("Loading vector from model '{}'".format(vectors))
|
|
_load_vectors(nlp, vectors)
|
|
|
|
# Multitask objectives
|
|
multitask_options = [("parser", parser_multitasks), ("ner", entity_multitasks)]
|
|
for pipe_name, multitasks in multitask_options:
|
|
if multitasks:
|
|
if pipe_name not in pipeline:
|
|
msg.fail(
|
|
"Can't use multitask objective without '{}' in the "
|
|
"pipeline".format(pipe_name)
|
|
)
|
|
pipe = nlp.get_pipe(pipe_name)
|
|
for objective in multitasks.split(","):
|
|
pipe.add_multitask_objective(objective)
|
|
|
|
# Prepare training corpus
|
|
msg.text("Counting training words (limit={})".format(n_examples))
|
|
corpus = GoldCorpus(train_path, dev_path, limit=n_examples)
|
|
n_train_words = corpus.count_train()
|
|
|
|
if base_model:
|
|
# Start with an existing model, use default optimizer
|
|
optimizer = create_default_optimizer(Model.ops)
|
|
else:
|
|
# Start with a blank model, call begin_training
|
|
optimizer = nlp.begin_training(lambda: corpus.train_tuples, device=use_gpu)
|
|
|
|
nlp._optimizer = None
|
|
|
|
# Load in pre-trained weights
|
|
if init_tok2vec is not None:
|
|
components = _load_pretrained_tok2vec(nlp, init_tok2vec)
|
|
msg.text("Loaded pretrained tok2vec for: {}".format(components))
|
|
|
|
# fmt: off
|
|
row_head = ["Itn", "Dep Loss", "NER Loss", "UAS", "NER P", "NER R", "NER F", "Tag %", "Token %", "CPU WPS", "GPU WPS"]
|
|
row_widths = [3, 10, 10, 7, 7, 7, 7, 7, 7, 7, 7]
|
|
if has_beam_widths:
|
|
row_head.insert(1, "Beam W.")
|
|
row_widths.insert(1, 7)
|
|
row_settings = {"widths": row_widths, "aligns": tuple(["r" for i in row_head]), "spacing": 2}
|
|
# fmt: on
|
|
print("")
|
|
msg.row(row_head, **row_settings)
|
|
msg.row(["-" * width for width in row_settings["widths"]], **row_settings)
|
|
try:
|
|
iter_since_best = 0
|
|
best_score = 0.0
|
|
for i in range(n_iter):
|
|
train_docs = corpus.train_docs(
|
|
nlp, noise_level=noise_level, gold_preproc=gold_preproc, max_length=0
|
|
)
|
|
if raw_text:
|
|
random.shuffle(raw_text)
|
|
raw_batches = util.minibatch(
|
|
(nlp.make_doc(rt["text"]) for rt in raw_text), size=8
|
|
)
|
|
words_seen = 0
|
|
with tqdm.tqdm(total=n_train_words, leave=False) as pbar:
|
|
losses = {}
|
|
for batch in util.minibatch_by_words(train_docs, size=batch_sizes):
|
|
if not batch:
|
|
continue
|
|
docs, golds = zip(*batch)
|
|
nlp.update(
|
|
docs,
|
|
golds,
|
|
sgd=optimizer,
|
|
drop=next(dropout_rates),
|
|
losses=losses,
|
|
)
|
|
if raw_text:
|
|
# If raw text is available, perform 'rehearsal' updates,
|
|
# which use unlabelled data to reduce overfitting.
|
|
raw_batch = list(next(raw_batches))
|
|
nlp.rehearse(raw_batch, sgd=optimizer, losses=losses)
|
|
if not int(os.environ.get("LOG_FRIENDLY", 0)):
|
|
pbar.update(sum(len(doc) for doc in docs))
|
|
words_seen += sum(len(doc) for doc in docs)
|
|
with nlp.use_params(optimizer.averages):
|
|
util.set_env_log(False)
|
|
epoch_model_path = output_path / ("model%d" % i)
|
|
nlp.to_disk(epoch_model_path)
|
|
nlp_loaded = util.load_model_from_path(epoch_model_path)
|
|
for beam_width in eval_beam_widths:
|
|
for name, component in nlp_loaded.pipeline:
|
|
if hasattr(component, "cfg"):
|
|
component.cfg["beam_width"] = beam_width
|
|
dev_docs = list(
|
|
corpus.dev_docs(nlp_loaded, gold_preproc=gold_preproc)
|
|
)
|
|
nwords = sum(len(doc_gold[0]) for doc_gold in dev_docs)
|
|
start_time = timer()
|
|
scorer = nlp_loaded.evaluate(dev_docs, debug)
|
|
end_time = timer()
|
|
if use_gpu < 0:
|
|
gpu_wps = None
|
|
cpu_wps = nwords / (end_time - start_time)
|
|
else:
|
|
gpu_wps = nwords / (end_time - start_time)
|
|
with Model.use_device("cpu"):
|
|
nlp_loaded = util.load_model_from_path(epoch_model_path)
|
|
for name, component in nlp_loaded.pipeline:
|
|
if hasattr(component, "cfg"):
|
|
component.cfg["beam_width"] = beam_width
|
|
dev_docs = list(
|
|
corpus.dev_docs(nlp_loaded, gold_preproc=gold_preproc)
|
|
)
|
|
start_time = timer()
|
|
scorer = nlp_loaded.evaluate(dev_docs)
|
|
end_time = timer()
|
|
cpu_wps = nwords / (end_time - start_time)
|
|
acc_loc = output_path / ("model%d" % i) / "accuracy.json"
|
|
srsly.write_json(acc_loc, scorer.scores)
|
|
|
|
# Update model meta.json
|
|
meta["lang"] = nlp.lang
|
|
meta["pipeline"] = nlp.pipe_names
|
|
meta["spacy_version"] = ">=%s" % about.__version__
|
|
if beam_width == 1:
|
|
meta["speed"] = {
|
|
"nwords": nwords,
|
|
"cpu": cpu_wps,
|
|
"gpu": gpu_wps,
|
|
}
|
|
meta["accuracy"] = scorer.scores
|
|
else:
|
|
meta.setdefault("beam_accuracy", {})
|
|
meta.setdefault("beam_speed", {})
|
|
meta["beam_accuracy"][beam_width] = scorer.scores
|
|
meta["beam_speed"][beam_width] = {
|
|
"nwords": nwords,
|
|
"cpu": cpu_wps,
|
|
"gpu": gpu_wps,
|
|
}
|
|
meta["vectors"] = {
|
|
"width": nlp.vocab.vectors_length,
|
|
"vectors": len(nlp.vocab.vectors),
|
|
"keys": nlp.vocab.vectors.n_keys,
|
|
"name": nlp.vocab.vectors.name,
|
|
}
|
|
meta.setdefault("name", "model%d" % i)
|
|
meta.setdefault("version", version)
|
|
meta_loc = output_path / ("model%d" % i) / "meta.json"
|
|
srsly.write_json(meta_loc, meta)
|
|
util.set_env_log(verbose)
|
|
|
|
progress = _get_progress(
|
|
i,
|
|
losses,
|
|
scorer.scores,
|
|
beam_width=beam_width if has_beam_widths else None,
|
|
cpu_wps=cpu_wps,
|
|
gpu_wps=gpu_wps,
|
|
)
|
|
msg.row(progress, **row_settings)
|
|
# Early stopping
|
|
if n_early_stopping is not None:
|
|
current_score = _score_for_model(meta)
|
|
if current_score < best_score:
|
|
iter_since_best += 1
|
|
else:
|
|
iter_since_best = 0
|
|
best_score = current_score
|
|
if iter_since_best >= n_early_stopping:
|
|
msg.text(
|
|
"Early stopping, best iteration "
|
|
"is: {}".format(i - iter_since_best)
|
|
)
|
|
msg.text(
|
|
"Best score = {}; Final iteration "
|
|
"score = {}".format(best_score, current_score)
|
|
)
|
|
break
|
|
finally:
|
|
with nlp.use_params(optimizer.averages):
|
|
final_model_path = output_path / "model-final"
|
|
nlp.to_disk(final_model_path)
|
|
msg.good("Saved model to output directory", final_model_path)
|
|
with msg.loading("Creating best model..."):
|
|
best_model_path = _collate_best_model(meta, output_path, nlp.pipe_names)
|
|
msg.good("Created best model", best_model_path)
|
|
|
|
|
|
def _score_for_model(meta):
|
|
""" Returns mean score between tasks in pipeline that can be used for early stopping. """
|
|
mean_acc = list()
|
|
pipes = meta["pipeline"]
|
|
acc = meta["accuracy"]
|
|
if "tagger" in pipes:
|
|
mean_acc.append(acc["tags_acc"])
|
|
if "parser" in pipes:
|
|
mean_acc.append((acc["uas"] + acc["las"]) / 2)
|
|
if "ner" in pipes:
|
|
mean_acc.append((acc["ents_p"] + acc["ents_r"] + acc["ents_f"]) / 3)
|
|
return sum(mean_acc) / len(mean_acc)
|
|
|
|
|
|
@contextlib.contextmanager
|
|
def _create_progress_bar(total):
|
|
if int(os.environ.get("LOG_FRIENDLY", 0)):
|
|
yield
|
|
else:
|
|
pbar = tqdm.tqdm(total=total, leave=False)
|
|
yield pbar
|
|
|
|
|
|
def _load_vectors(nlp, vectors):
|
|
util.load_model(vectors, vocab=nlp.vocab)
|
|
for lex in nlp.vocab:
|
|
values = {}
|
|
for attr, func in nlp.vocab.lex_attr_getters.items():
|
|
# These attrs are expected to be set by data. Others should
|
|
# be set by calling the language functions.
|
|
if attr not in (CLUSTER, PROB, IS_OOV, LANG):
|
|
values[lex.vocab.strings[attr]] = func(lex.orth_)
|
|
lex.set_attrs(**values)
|
|
lex.is_oov = False
|
|
|
|
|
|
def _load_pretrained_tok2vec(nlp, loc):
|
|
"""Load pre-trained weights for the 'token-to-vector' part of the component
|
|
models, which is typically a CNN. See 'spacy pretrain'. Experimental.
|
|
"""
|
|
with loc.open("rb") as file_:
|
|
weights_data = file_.read()
|
|
loaded = []
|
|
for name, component in nlp.pipeline:
|
|
if hasattr(component, "model") and hasattr(component.model, "tok2vec"):
|
|
component.tok2vec.from_bytes(weights_data)
|
|
loaded.append(name)
|
|
return loaded
|
|
|
|
|
|
def _collate_best_model(meta, output_path, components):
|
|
bests = {}
|
|
for component in components:
|
|
bests[component] = _find_best(output_path, component)
|
|
best_dest = output_path / "model-best"
|
|
shutil.copytree(output_path / "model-final", best_dest)
|
|
for component, best_component_src in bests.items():
|
|
shutil.rmtree(best_dest / component)
|
|
shutil.copytree(best_component_src / component, best_dest / component)
|
|
accs = srsly.read_json(best_component_src / "accuracy.json")
|
|
for metric in _get_metrics(component):
|
|
meta["accuracy"][metric] = accs[metric]
|
|
srsly.write_json(best_dest / "meta.json", meta)
|
|
return best_dest
|
|
|
|
|
|
def _find_best(experiment_dir, component):
|
|
accuracies = []
|
|
for epoch_model in experiment_dir.iterdir():
|
|
if epoch_model.is_dir() and epoch_model.parts[-1] != "model-final":
|
|
accs = srsly.read_json(epoch_model / "accuracy.json")
|
|
scores = [accs.get(metric, 0.0) for metric in _get_metrics(component)]
|
|
accuracies.append((scores, epoch_model))
|
|
if accuracies:
|
|
return max(accuracies)[1]
|
|
else:
|
|
return None
|
|
|
|
|
|
def _get_metrics(component):
|
|
if component == "parser":
|
|
return ("las", "uas", "token_acc")
|
|
elif component == "tagger":
|
|
return ("tags_acc",)
|
|
elif component == "ner":
|
|
return ("ents_f", "ents_p", "ents_r")
|
|
return ("token_acc",)
|
|
|
|
|
|
def _get_progress(itn, losses, dev_scores, beam_width=None, cpu_wps=0.0, gpu_wps=0.0):
|
|
scores = {}
|
|
for col in [
|
|
"dep_loss",
|
|
"tag_loss",
|
|
"uas",
|
|
"tags_acc",
|
|
"token_acc",
|
|
"ents_p",
|
|
"ents_r",
|
|
"ents_f",
|
|
"cpu_wps",
|
|
"gpu_wps",
|
|
]:
|
|
scores[col] = 0.0
|
|
scores["dep_loss"] = losses.get("parser", 0.0)
|
|
scores["ner_loss"] = losses.get("ner", 0.0)
|
|
scores["tag_loss"] = losses.get("tagger", 0.0)
|
|
scores.update(dev_scores)
|
|
scores["cpu_wps"] = cpu_wps
|
|
scores["gpu_wps"] = gpu_wps or 0.0
|
|
result = [
|
|
itn,
|
|
"{:.3f}".format(scores["dep_loss"]),
|
|
"{:.3f}".format(scores["ner_loss"]),
|
|
"{:.3f}".format(scores["uas"]),
|
|
"{:.3f}".format(scores["ents_p"]),
|
|
"{:.3f}".format(scores["ents_r"]),
|
|
"{:.3f}".format(scores["ents_f"]),
|
|
"{:.3f}".format(scores["tags_acc"]),
|
|
"{:.3f}".format(scores["token_acc"]),
|
|
"{:.0f}".format(scores["cpu_wps"]),
|
|
"{:.0f}".format(scores["gpu_wps"]),
|
|
]
|
|
if beam_width is not None:
|
|
result.insert(1, beam_width)
|
|
return result
|