def test_plotting_training_curves_and_weights(resources_path):
plotter = Plotter()
plotter.plot_training_curves(resources_path / "visual/loss.tsv")
plotter.plot_weights(resources_path / "visual/weights.txt")
# clean up directory
(resources_path / "visual/weights.png").unlink()
(resources_path / "visual/training.png").unlink()
def test_plotting_training_curves_and_weights():
plotter = Plotter()
plotter.plot_training_curves('./resources/visual/loss.tsv')
plotter.plot_weights('./resources/visual/weights.txt')
# clean up directory
os.remove('./resources/visual/weights.png')
os.remove('./resources/visual/training.png')
def plot_curve(self,
traing_curve_path=os.path.normpath(
r'./resources/taggers/slow_bert/loss.tsv'),
weights_path=os.path.normpath(
r'./resources/taggers/slow_bert/loss.tsv')):
from flair.visual.training_curves import Plotter
plotter = Plotter()
plotter.plot_training_curves(traing_curve_path)
plotter.plot_weights(weights_path)
def main(args):
args = parser.parse_args()
# 1. get the corpus
corpus: TaggedCorpus = NLPTaskDataFetcher.load_classification_corpus(
args.data_dir[0],
train_file='train.txt',
dev_file='dev.txt',
test_file='test.txt')
# 2. create the label dictionary
label_dict = corpus.make_label_dictionary()
# 3. make a list of word embeddings
word_embeddings = [
WordEmbeddings('glove'),
# comment in flair embeddings for state-of-the-art results
# FlairEmbeddings('news-forward'),
# FlairEmbeddings('news-backward'),
# ELMoEmbeddings()
]
# 4. init document embedding by passing list of word embeddings
document_embeddings: DocumentLSTMEmbeddings = DocumentLSTMEmbeddings(
word_embeddings,
hidden_size=128,
reproject_words=True,
reproject_words_dimension=64,
)
# 5. create the text classifier
classifier = TextClassifier(document_embeddings,
label_dictionary=label_dict,
multi_label=False)
# 6. initialize the text classifier trainer
trainer = ModelTrainer(classifier, corpus)
# 7. start the training
model_out = 'resources/classifiers/sentence-classification/glove'
trainer.train(model_out,
learning_rate=0.1,
mini_batch_size=32,
anneal_factor=0.5,
patience=5,
max_epochs=100)
# 8. plot training curves (optional)
from flair.visual.training_curves import Plotter
plotter = Plotter()
plotter.plot_training_curves(join(model_out, 'loss.tsv'))
plotter.plot_weights(join(model_out, 'weights.txt'))
def __init__(self, corpus_name: str):
corpus = NLPTaskDataFetcher.load_column_corpus(
loc.abs_path([loc.ASSETS, loc.MODELS, loc.DIRKSON]), {
0: 'text',
1: 'ner'
},
train_file=corpus_name + loc.DIRKSON_VALIDATION_TXT,
test_file=corpus_name + loc.DIRKSON_TEST_TXT)
embedding_types = [
BertEmbeddings('bert-base-uncased'),
FlairEmbeddings('mix-forward'),
FlairEmbeddings('mix-backward')
]
tag_type = 'ner'
embeddings = StackedEmbeddings(embeddings=embedding_types)
tag_dictionary = corpus.make_tag_dictionary(tag_type=tag_type)
tagger: SequenceTagger = SequenceTagger(hidden_size=256,
embeddings=embeddings,
tag_dictionary=tag_dictionary,
tag_type=tag_type,
use_crf=True)
trainer: ModelTrainer = ModelTrainer(tagger, corpus)
if not path.exists:
os.mkdir(
loc.abs_path(
[loc.ASSETS, loc.MODELS, loc.DIRKSON, corpus_name]))
trainer.train(loc.abs_path(
[loc.ASSETS, loc.MODELS, loc.DIRKSON, corpus_name]),
learning_rate=0.1,
mini_batch_size=32,
max_epochs=150)
plotter = Plotter()
plotter.plot_training_curves(
loc.abs_path([
loc.ASSETS, loc.MODELS, loc.DIRKSON, corpus_name, loc.LOSS_TSV
]))
plotter.plot_weights(
loc.abs_path([
loc.ASSETS, loc.MODELS, loc.DIRKSON, corpus_name,
loc.WEIGHTS_TXT
]))
def train(self,
trainfile,
devfile,
testfile,
resfolder,
embtype="bert",
chunk_len=100,
batch_len=8):
"""
*** This method can be used to train new models with the settings used in project Redewiedergabe
It is not accessible from rwtagger_script and not documented in detail. Use at your own risk. ;-)
***
:param trainfile:
:param devfile:
:param testfile:
:param resfolder:
:param embtype:
:param chunk_len:
:param batch_len:
:return:
"""
emb_name, embeddings = self._get_embeddings(embtype)
corpus: Corpus = self.create_corpus(trainfile, devfile, testfile,
chunk_len)
tag_dictionary = corpus.make_tag_dictionary(tag_type="cat")
if not os.path.exists(resfolder):
os.makedirs(resfolder)
tagger: SequenceTagger = SequenceTagger(hidden_size=256,
embeddings=embeddings,
tag_dictionary=tag_dictionary,
tag_type="cat",
use_crf=True,
rnn_layers=2)
trainer: ModelTrainer = ModelTrainer(tagger, corpus)
trainer.train(resfolder,
learning_rate=0.1,
mini_batch_size=batch_len,
max_epochs=150,
checkpoint=True)
# plot training curves
plotter = Plotter()
plotter.plot_training_curves(os.path.join(resfolder, 'loss.tsv'))
plotter.plot_weights(os.path.join(resfolder, 'weights.txt'))
def train_sequence_labeling_model(data_folder, proposed_tags_vocabulary_size):
# define columns
columns = {0: 'text', 1: 'pos', 2: 'is_separator', 3: 'proposed_tags'}
# init a corpus using column format, data folder and the names of the train and test files
# 1. get the corpus
corpus: Corpus = ColumnCorpus(data_folder, columns,
train_file='train',
test_file='test',
dev_file=None)
log.info(corpus)
# 2. what tag do we want to predict
tag_type = 'pos'
# 3. make the tag dictionary from the corpus
tag_dictionary = corpus.make_tag_dictionary(tag_type=tag_type)
log.info(tag_dictionary)
# 4. initialize embeddings
local_model_path = use_scratch_dir_if_available('resources/polish_FastText_embeddings')
embedding_types: List[TokenEmbeddings] = [
FlairEmbeddings('pl-forward', chars_per_chunk=64),
FlairEmbeddings('pl-backward', chars_per_chunk=64),
OneHotEmbeddings(corpus=corpus, field='is_separator', embedding_length=3, min_freq=3),
OneHotEmbeddings(corpus=corpus, field='proposed_tags',
embedding_length=math.ceil((proposed_tags_vocabulary_size + 1)**0.25),
min_freq=3),
WordEmbeddings(local_model_path) if os.path.exists(local_model_path) else WordEmbeddings('pl')
]
embeddings: StackedEmbeddings = StackedEmbeddings(embeddings=embedding_types)
# 5. initialize sequence tagger
tagger: SequenceTagger = SequenceTagger(hidden_size=256,
embeddings=embeddings,
tag_dictionary=tag_dictionary,
tag_type=tag_type,
use_crf=False,
rnn_layers=2)
# 6. initialize trainer
trainer: ModelTrainer = ModelTrainer(tagger, corpus)
# 7. start training
trainer.train(use_scratch_dir_if_available('resources_pol_eval/taggers/example-pos/'),
learning_rate=0.1,
mini_batch_size=32,
embeddings_storage_mode='gpu',
max_epochs=sys.maxsize,
monitor_test=True)
# 8. plot weight traces (optional)
plotter = Plotter()
plotter.plot_weights(use_scratch_dir_if_available('resources_pol_eval/taggers/example-pos/weights.txt'))
def train(data_folder, model_output_folder):
corpus: TaggedCorpus = NLPTaskDataFetcher.load_corpus(
NLPTask.CONLL_03, base_path=data_folder)
# 2. what tag do we want to predict?
tag_type = 'ner'
# 3. make the tag dictionary from the corpus
tag_dictionary = corpus.make_tag_dictionary(tag_type=tag_type)
print(tag_dictionary.idx2item)
# init Flair embeddings
flair_forward_embedding = FlairEmbeddings('multi-forward')
flair_backward_embedding = FlairEmbeddings('multi-backward')
# init multilingual BERT
bert_embedding = BertEmbeddings('bert-base-multilingual-cased')
# 4. initialize embeddings
embedding_types: List[TokenEmbeddings] = [
flair_forward_embedding, flair_backward_embedding, bert_embedding
]
embeddings: StackedEmbeddings = StackedEmbeddings(
embeddings=embedding_types)
# 5. initialize sequence tagger
from flair.models import SequenceTagger
tagger: SequenceTagger = SequenceTagger(hidden_size=256,
embeddings=embeddings,
tag_dictionary=tag_dictionary,
tag_type=tag_type)
# 6. initialize trainer
from flair.trainers import ModelTrainer
trainer: ModelTrainer = ModelTrainer(tagger, corpus)
# 7. start training
trainer.train(model_output_folder, mini_batch_size=256, max_epochs=150)
# 8. plot training curves (optional)
from flair.visual.training_curves import Plotter
plotter = Plotter()
plotter.plot_training_curves(model_output_folder + '/loss.tsv')
plotter.plot_weights(model_output_folder + '/weights.txt')
def train(
self,
output_dir: Union[Path, str],
learning_rate: float = 0.07,
mini_batch_size: int = 32,
anneal_factor: float = 0.5,
patience: int = 5,
max_epochs: int = 150,
plot_weights: bool = False,
**kwargs,
) -> None:
"""
Train the Sequence Classifier
* **output_dir** - The output directory where the model predictions and checkpoints will be written.
* **learning_rate** - The initial learning rate
* **mini_batch_size** - Batch size for the dataloader
* **anneal_factor** - The factor by which the learning rate is annealed
* **patience** - Patience is the number of epochs with no improvement the Trainer waits until annealing the learning rate
* **max_epochs** - Maximum number of epochs to train. Terminates training if this number is surpassed.
* **plot_weights** - Bool to plot weights or not
* **kwargs** - Keyword arguments for the rest of Flair's `Trainer.train()` hyperparameters
"""
if isinstance(output_dir, str):
output_dir = Path(output_dir)
# Start the training
self.trainer.train(
output_dir,
learning_rate=learning_rate,
mini_batch_size=mini_batch_size,
anneal_factor=anneal_factor,
patience=patience,
max_epochs=max_epochs,
**kwargs,
)
# Plot weight traces
if plot_weights:
plotter = Plotter()
plotter.plot_weights(output_dir / "weights.txt")
def main():
train_dev_corpus = NLPTaskDataFetcher.load_classification_corpus(
Path(DATA_PATH),
train_file='flair_train.csv',
test_file='flair_test.csv',
dev_file='flair_dev.csv')
label_dict = train_dev_corpus.make_label_dictionary()
word_embeddings = [
WordEmbeddings('crawl'),
FlairEmbeddings('news-forward-fast', chars_per_chunk=128),
FlairEmbeddings('news-backward-fast', chars_per_chunk=128)
]
document_embeddings = DocumentRNNEmbeddings(word_embeddings,
rnn_type='LSTM',
hidden_size=128,
reproject_words=True,
reproject_words_dimension=64)
classifier = TextClassifier(document_embeddings,
label_dictionary=label_dict,
multi_label=False)
trainer = ModelTrainer(classifier, train_dev_corpus)
trainer.train(PRETRAINED_FLAIR,
max_epochs=40,
learning_rate=0.2,
mini_batch_size=32,
embeddings_in_memory=False,
checkpoint=True)
plotter = Plotter()
plotter.plot_training_curves(FLAIR_LOSS)
plotter.plot_weights(FLAIR_WEIGHTS)
# Just replace the names of model and print the details of training and weights
from flair.visual.training_curves import Plotter
plotter = Plotter()
plotter.plot_training_curves('FLAIR/resources/taggers/flairpos1/loss.tsv')
plotter.plot_weights('FLAIR/resources/taggers/flairpos1/weights.txt')
reproject_words_dimension=256,
)
# 5. create the text classifier
classifier = TextClassifier(document_embeddings, label_dictionary=label_dict)
# 6. initialize the text classifier trainer
trainer = ModelTrainer(classifier, corpus)
# 7. start the training
trainer.train('/home/anna/Desktop/markup/8',
learning_rate=0.1,
mini_batch_size=32,
anneal_factor=0.5,
patience=5,
max_epochs=150)
# 8. plot weight traces (optional)
from flair.visual.training_curves import Plotter
plotter = Plotter()
plotter.plot_weights('/home/anna/Desktop/markup/8/weights.txt')
classifier = TextClassifier.load('/home/anna/Desktop/markup/8/final-model.pt')
# create example sentences
sentence = Sentence('France is the current world cup winner.')
# predict class and print
classifier.predict(sentence)
print(sentence.labels)
# CharLMEmbeddings('news-forward'),
# CharLMEmbeddings('news-backward'),
]
embeddings = WordEmbeddings("tmp/glove.bin")
# 5. initialize sequence tagger
from flair.models import SequenceTagger
tagger: SequenceTagger = SequenceTagger(hidden_size=1024,
embeddings=embeddings,
tag_dictionary=tag_dictionary,
tag_type=tag_type,
use_crf=True)
# 6. initialize trainer
from flair.trainers import SequenceTaggerTrainer
trainer: SequenceTaggerTrainer = SequenceTaggerTrainer(tagger, corpus)
# 7. start training
trainer.train('resources/taggers/example-ner',
learning_rate=0.1,
mini_batch_size=8,
max_epochs=150)
# 8. plot training curves (optional)
from flair.visual.training_curves import Plotter
plotter = Plotter()
plotter.plot_training_curves('resources/taggers1/example-ner/loss.tsv')
plotter.plot_weights('resources/taggers1/example-ner/weights.txt')
)
# 5. create the text classifier
classifier = TextClassifier(document_embeddings, label_dictionary=label_dict)
# 6. initialize the text classifier trainer
trainer = ModelTrainer(classifier, corpus)
# 7. start the training
trainer.train('resources/taggers/ag_news',
learning_rate=0.1,
mini_batch_size=32,
anneal_factor=0.5,
patience=5,
max_epochs=150)
# 8. plot training curves (optional)
from flair.visual.training_curves import Plotter
plotter = Plotter()
plotter.plot_training_curves('resources/taggers/ag_news/loss.tsv')
plotter.plot_weights('resources/taggers/ag_news/weights.txt')
classifier = TextClassifier.load('resources/taggers/ag_news/final-model.pt')
# create example sentence
sentence = Sentence('France is the current world cup winner.')
# predict tags and print
classifier.predict(sentence)
print(sentence.labels)
def trainer(file_path: Path, filenames: Tuple[str, str, str], checkpoint: str,
stack: str, n_epochs: int) -> None:
"""Train sentiment model using Flair NLP library:
https://github.com/zalandoresearch/flair/blob/master/resources/docs/TUTORIAL_7_TRAINING_A_MODEL.md
To help provide added context, we can stack Glove, Bert or ELMo embeddings along with Flair embeddings.
"""
# pip install flair allennlp
from flair.datasets import ClassificationCorpus
from flair.embeddings import FlairEmbeddings, DocumentRNNEmbeddings, DocumentPoolEmbeddings
from flair.models import TextClassifier
from flair.trainers import ModelTrainer
from flair.training_utils import EvaluationMetric
from flair.visual.training_curves import Plotter
if stack == "glove":
from flair.embeddings import WordEmbeddings
stacked_embedding = WordEmbeddings('glove')
elif stack == "fasttext":
from flair.embeddings import WordEmbeddings
stacked_embedding = WordEmbeddings('it')
elif stack == "elmo":
from flair.embeddings import ELMoEmbeddings
stacked_embedding = ELMoEmbeddings('original')
elif stack == "bert":
from flair.embeddings import BertEmbeddings
stacked_embedding = BertEmbeddings('bert-base-uncased')
elif stack == "bert-multi":
from flair.embeddings import BertEmbeddings
stacked_embedding = BertEmbeddings('bert-base-multilingual-uncased')
elif stack == 'bpe':
from flair.embeddings import BytePairEmbeddings
stacked_embedding = BytePairEmbeddings('it')
else:
stacked_embedding = None
# Define and Load corpus from the provided dataset
train, dev, test = filenames
corpus = ClassificationCorpus(
file_path,
train_file=train,
dev_file=dev,
test_file=test,
)
# Create label dictionary from provided labels in data
label_dict = corpus.make_label_dictionary()
# Stack Flair string-embeddings with optional embeddings
word_embeddings = list(
filter(None, [
stacked_embedding,
FlairEmbeddings('it-forward'),
FlairEmbeddings('it-backward'),
]))
# Initialize document embedding by passing list of word embeddings
document_embeddings = DocumentRNNEmbeddings(
word_embeddings,
hidden_size=256,
reproject_words=True,
dropout=0.5,
reproject_words_dimension=256,
)
#document_embeddings = DocumentPoolEmbeddings([
# stacked_embedding,
# FlairEmbeddings('it-forward'),
# FlairEmbeddings('it-backward')],pooling='mean')
# Define classifier
classifier = TextClassifier(document_embeddings,
label_dictionary=label_dict,
multi_label=True)
if not checkpoint:
trainer = ModelTrainer(classifier, corpus)
else:
# If checkpoint file is defined, resume training
#checkpoint = classifier.load_checkpoint(Path(checkpoint))
trainer = ModelTrainer.load_checkpoint(checkpoint, corpus)
# Begin training (enable checkpointing to continue training at a later time, if desired)
trainer.train(
file_path,
max_epochs=n_epochs,
checkpoint=True,
)
# Plot curves and store weights and losses
plotter = Plotter()
plotter.plot_training_curves(file_path + '/loss.tsv')
plotter.plot_weights(file_path + '/weights.txt')
class SequenceTaggerEvaluation():
def __init__(self, path: Union[Path, str], model: str = 'final-model.pt'):
if type(path) == str:
path = Path(path)
assert path.exists()
self.path = path
self.model = SequenceTagger.load(path / model)
self.cv_results = {}
for file in ['summary', 'details']:
try:
self.cv_results[file] = pickle.load(
(path / (file + '.pkl')).open(mode='rb'))
except FileNotFoundError:
print(
f"{file+'.pkl'} not found. Setting cv_results['{file}'] to None"
)
self.plotter = Plotter()
def result_tables(self, save_as_html: bool = True):
html_0 = self.cv_results['summary'].to_frame('value').to_html()
html_1 = self.cv_results['details'].to_html()
display(HTML(html_0))
print('\n')
display(HTML(html_1))
if save_as_html:
(self.path / 'summary.html').write_text(html_0)
(self.path / 'details.html').write_text(html_1)
def plot_tag_stats(self, mode: str, savefig: bool = False, **kwargs):
"""
mode
tp-fn: stacked barplot - true-positives and false-negatives
tp-fp: bar plot - true-positives and false-positives
"""
details = self.cv_results['details']
if mode == 'tp_fn':
details[['true-positive', 'false-negative']].plot.bar(stacked=True,
**kwargs)
elif mode == 'tp_fp':
details[['true-positive',
'false-positive']].plot.bar(stacked=False, **kwargs)
else:
details[mode.split('_')].plot.bar(stacked=False, **kwargs)
plt.gca().yaxis.grid(True, linestyle='--')
plt.tight_layout()
if savefig:
plt.savefig(self.path / (mode + '.png'))
def confusion_matrix(self, ):
# confusion matrix tags
pass
def predict(self,
sentences: Union[str, Sentence, List[Sentence], List[str]],
display_html: bool = True,
html_file: str = None,
display_str: bool = False,
**kwargs):
if type(sentences) == Sentence:
sentences = [sentences]
elif type(sentences) == str:
sentences = split_single(sentences)
if type(sentences[0]) == str:
sentences = [Sentence(s, use_tokenizer=True) for s in sentences]
self.model.predict(sentences)
if display_html or html_file:
html = render_ner_html(sentences, **kwargs)
if display_html:
display(HTML(html))
if html_file:
(self.path / html_file).write_text(html)
if display_str:
for sentence in sentences:
print(sentence.to_tagged_string())
def plot_training_curves(self, plot_values: List[str] = ["loss", "F1"]):
self.plotter.plot_training_curves(self.path / 'loss.tsv', plot_values)
def plot_weights(self):
self.plotter.plot_weights(self.path / 'weights.txt')
def plot_learning_rate(self, skip_first: int = 10, skip_last: int = 5):
self.plotter.plot_learning_rate(self.path / 'loss.tsv', skip_first,
skip_last)
@staticmethod
def _preprocess(text, mode=None):
'''helper function to preprocess text. returns List of Sentences'''
sentences = split_single(text)
if mode:
nlp = spacy.load('de_core_news_sm')
if mode == 'lemmatize':
sentences = [
Sentence((' ').join([token.lemma_ for token in nlp(s)]))
for s in sentences
]
elif mode == 'stem':
stemmer = GermanStemmer()
sentences = [
Sentence((' ').join(
[stemmer.stem(token.text) for token in nlp(s)]))
for s in sentences
]
else:
sentences = [Sentence(s, use_tokenizer=True) for s in sentences]
return sentences
def train_sequence_labeling_model(data_folder, proposed_tags_vocabulary_size,
skf_split_no):
"""
Trains the sequence labeling model (by default model uses one RNN layer).
Model is trained to predict part of speech tag and takes into account information about:
- text (plain text made of tokens that together form a sentence),
- occurrence of separator before token,
- proposed tags for given token.
It is trained with use of Stacked Embeddings used to combine different embeddings together. Words are embedded
using a concatenation of three vector embeddings:
- WordEmbeddings - classic word embeddings. That kind of embeddings are static and word-level, meaning that each
distinct word gets exactly one pre-computed embedding. Here FastText embeddings trained over polish Wikipedia are
used.
- CharacterEmbeddings - allow to add character-level word embeddings during model training. These embeddings are
randomly initialized when the class is being initialized, so they are not meaningful unless they are trained on
a specific downstream task. For instance, the standard sequence labeling architecture used by Lample et al. (2016)
is a combination of classic word embeddings with task-trained character features. Normally this would require to
implement a hierarchical embedding architecture in which character-level embeddings for each word are computed
using an RNN and then concatenated with word embeddings. In Flair, this is simplified by treating
CharacterEmbeddings just like any other embedding class. To reproduce the Lample architecture, there is only
a need to combine them with standard WordEmbeddings in an embedding stack.
- One Hot Embeddings - embeddings that encode each word in a vocabulary as a one-hot vector, followed by an
embedding layer. These embeddings thus do not encode any prior knowledge as do most other embeddings. They also
differ in that they require to see a Corpus during instantiation, so they can build up a vocabulary consisting of
the most common words seen in the corpus, plus an UNK token for all rare words.
There are one One Hot Embeddings used in training: to embed information about proposed tags (concatenated
with a ';') and appearance of separator before each token.
Model training is based on stratified 10 fold cross validation split indicated by skf_split_no argument.
Model and training logs are saved in resources_ex_3/taggers/example-pos/it-<skf_split_no> directory (where
<skf_split_no> is the number of stratified 10 fold cross validation split used to train the model).
:param data_folder: folder where files with column corpus split are stored. Those columns are used to initialize
ColumnCorpus object
:param proposed_tags_vocabulary_size: number of proposed tags
:param skf_split_no: number that indicates one of stratified 10 fold cross validation splits (from range 1 to 10)
used to train the model
"""
# define columns
columns = {0: 'text', 1: 'pos', 2: 'is_separator', 3: 'proposed_tags'}
# init a corpus using column format, data folder and the names of the train and test files
# 1. get the corpus
corpus: Corpus = ColumnCorpus(data_folder,
columns,
train_file='train_' + str(skf_split_no),
test_file='test_' + str(skf_split_no),
dev_file=None)
log.info(corpus)
# 2. what tag do we want to predict
tag_type = 'pos'
# 3. make the tag dictionary from the corpus
tag_dictionary = corpus.make_tag_dictionary(tag_type=tag_type)
log.info(tag_dictionary)
# 4. initialize embeddings
local_model_path = use_scratch_dir_if_available(
'resources/polish_FastText_embeddings')
embedding_types: List[TokenEmbeddings] = [
WordEmbeddings(local_model_path)
if os.path.exists(local_model_path) else WordEmbeddings('pl'),
CharacterEmbeddings(
use_scratch_dir_if_available('resources/polish_letters_dict')),
OneHotEmbeddings(corpus=corpus,
field='is_separator',
embedding_length=3,
min_freq=3),
OneHotEmbeddings(corpus=corpus,
field='proposed_tags',
embedding_length=math.ceil(
(proposed_tags_vocabulary_size + 1)**0.25),
min_freq=3)
]
embeddings: StackedEmbeddings = StackedEmbeddings(
embeddings=embedding_types)
# 5. initialize sequence tagger
tagger: SequenceTagger = SequenceTagger(hidden_size=256,
embeddings=embeddings,
tag_dictionary=tag_dictionary,
tag_type=tag_type,
use_crf=False,
rnn_layers=1)
# 6. initialize trainer
trainer: ModelTrainer = ModelTrainer(tagger, corpus)
# 7. start training
trainer.train(
use_scratch_dir_if_available('resources_ex_3/taggers/example-pos/it-' +
str(skf_split_no)),
learning_rate=0.1,
mini_batch_size=32,
embeddings_storage_mode='gpu',
max_epochs=sys.maxsize,
monitor_test=True)
# 8. plot weight traces (optional)
plotter = Plotter()
plotter.plot_weights(
use_scratch_dir_if_available('resources_ex_3/taggers/example-pos/it-' +
str(skf_split_no) + '/weights.txt'))
embeddings: StackedEmbeddings = StackedEmbeddings(embeddings=embedding_types)
# initialize sequence tagger
from flair.models import SequenceTagger
tagger: SequenceTagger = SequenceTagger(
hidden_size=nb_cells,
embeddings=embeddings,
tag_dictionary=tag_dictionary,
tag_type=tag_type,
use_crf=True,
)
# initialize trainer
from flair.trainers import ModelTrainer
trainer: ModelTrainer = ModelTrainer(tagger, corpus)
trainer.train(
"resources/taggers/" + exp_name,
learning_rate=0.1,
embeddings_storage_mode="cpu",
mini_batch_size=32,
max_epochs=150,
shuffle=False,
)
plotter = Plotter()
plotter.plot_training_curves("resources/taggers/" + exp_name + "/loss.tsv")
plotter.plot_weights("resources/taggers/" + exp_name + "/weights.txt")
# comment in this line to use character embeddings
# CharacterEmbeddings(),
# comment in these lines to use flair embeddings
# FlairEmbeddings('news-forward'),
# FlairEmbeddings('news-backward'),
]
embeddings: StackedEmbeddings = StackedEmbeddings(embeddings=embedding_types)
# initialize sequence tagger
tagger: SequenceTagger = SequenceTagger(hidden_size=256,
embeddings=embeddings,
tag_dictionary=tag_dictionary,
tag_type=tag_type,
use_crf=True)
# initialize trainer
trainer: ModelTrainer = ModelTrainer(tagger, corpus)
# start training
trainer.train("".join( ('flairmodel', str(n), '/taggers/example-ner' ) ),
learning_rate=0.1,
mini_batch_size=32,
max_epochs=150)
# plot weight traces (optional)
plotter = Plotter()
plotter.plot_weights("".join( ( 'flairmodel', str(n), '/taggers/example-ner/weights.txt' ) ))
embeddings: StackedEmbeddings = StackedEmbeddings(embeddings=embedding_types)
#5. initialize sequence tagger
from flair.models import SequenceTagger
tagger: SequenceTagger = SequenceTagger(hidden_size=256,
embeddings=embeddings,
tag_dictionary=tag_dictionary,
rnn_layers=2,
tag_type=tag_type,
use_crf=True)
# 6. initialize trainer
from flair.trainers import ModelTrainer
trainer: ModelTrainer = ModelTrainer(tagger, corpus)
# 7. start training
trainer.train('resources/taggers/usDL2',
learning_rate=0.01,
embeddings_in_memory=False,
mini_batch_size=32,
max_epochs=150,
checkpoint=True)
# 8. plot training curves (optional)
from flair.visual.training_curves import Plotter
plotter = Plotter()
plotter.plot_training_curves('resources/taggers/nerpan/loss.tsv')
plotter.plot_weights('resources/taggers/nerpan/weights.txt')
rnn_type='RNN_RELU')
classifier = TextClassifier(document_embeddings,
label_dictionary=corpus.make_label_dictionary(),
multi_label=False)
trainer = ModelTrainer(classifier, corpus)
trainer.train('./',
learning_rate=0.05,
mini_batch_size=32,
max_epochs=10,
evaluation_metric=EvaluationMetric.MACRO_F1_SCORE)
#plot training curves
from flair.visual.training_curves import Plotter
plotter = Plotter()
plotter.plot_training_curves('loss.tsv')
plotter.plot_weights('weights.txt')
#make a table with predictions
test_pred = pd.read_csv('test.tsv',
sep='\t',
encoding="utf-8",
names=['text', 'label', 'prediction', 'confidence'])
test_full = pd.concat([data_test_filtered, test_pred], axis=1, sort=False)
#make a table with wrong predicions
df = test_full.loc[test_full['prediction'] != test_full['label']]
wrong_prediction = df[[
'attribute::id', 'text', 'label', 'prediction', 'confidence'
]]
wrong_prediction.to_csv("cat_without_lemma_flair_wrong_pred.csv",
encoding='utf-8',
index=False)
# 4. initialize embeddings
embedding_types = WordEmbeddings('ru-wiki')
# 5. initialize sequence tagger
from flair.models import SequenceTagger
tagger: SequenceTagger = SequenceTagger(hidden_size=256,
embeddings=embedding_types,
tag_dictionary=tag_dictionary,
tag_type=tag_type,
use_crf=True)
# 6. initialize trainer
from flair.trainers import ModelTrainer
trainer: ModelTrainer = ModelTrainer(tagger, corpus)
# 7. start training
trainer.train('/home/anna/Desktop/markup/brat_data/without_out/model',
learning_rate=0.1,
mini_batch_size=32,
max_epochs=150)
# 8. plot weight traces (optional)
from flair.visual.training_curves import Plotter
plotter = Plotter()
plotter.plot_weights(
'/home/anna/Desktop/markup/brat_data/without_out/model/weights.txt')
from flair.visual.training_curves import Plotter
clf_dir = 'resources/binary_unbiased_031219/'
plotter = Plotter()
plotter.plot_training_curves('./resources/loss.tsv')
plotter.plot_weights(clf_dir + 'weights.txt')
# CCASS Flair Embeddings BWD
#FlairEmbeddings('/data/embeddings_CCASS/flair_language_model/jurinet/best-lm-backward.pt')
]
embeddings: StackedEmbeddings = StackedEmbeddings(embeddings=embedding_types)
# 5. initialize sequence tagger
from flair.models import SequenceTagger
tagger: SequenceTagger = SequenceTagger(hidden_size=256,
embeddings=embeddings,
tag_dictionary=tag_dictionary,
tag_type=tag_type,
use_crf=True)
# 6. initialize trainer
from flair.trainers import ModelTrainer
trainer: ModelTrainer = ModelTrainer(tagger, corpus)
#trainer.num_workers = 20
# 7. start training
trainer.train('models/baseline_ner',
learning_rate=0.1,
mini_batch_size=32,
max_epochs=150)
# 8. plot weight traces (optional)
from flair.visual.training_curves import Plotter
plotter = Plotter()
plotter.plot_weights('models/baseline_ner/weights.txt')
embeddings: StackedEmbeddings = StackedEmbeddings(embeddings=embedding_types)
# initialize sequence tagger
from flair.models import SequenceTagger
tagger: SequenceTagger = SequenceTagger(
hidden_size=256,
embeddings=embeddings,
tag_dictionary=tag_dictionary,
tag_type=tag_type,
use_crf=True,
)
# initialize trainer
from flair.trainers import ModelTrainer
trainer: ModelTrainer = ModelTrainer(tagger, corpus)
trainer.train(
"resources/taggers/example-ner",
learning_rate=0.1,
mini_batch_size=32,
max_epochs=1,
shuffle=False,
)
plotter = Plotter()
plotter.plot_training_curves("resources/taggers/example-ner/loss.tsv")
plotter.plot_weights("resources/taggers/example-ner/weights.txt")
embeddings: StackedEmbeddings = StackedEmbeddings(embeddings=embedding_types)
# initialize sequence tagger
from flair.models import SequenceTagger
tagger: SequenceTagger = SequenceTagger(hidden_size=256,
embeddings=embeddings,
tag_dictionaries=tag_dictionaries,
tag_types=tag_types,
use_crf=True)
# initialize trainer
from flair.trainers import ModelTrainer
trainer: ModelTrainer = ModelTrainer(tagger, corpus)
# trainer: ModelTrainer = ModelTrainer(tagger, corpus, optimizer=Adam)
trainer.train('resources/taggers/famulus_eda_test_n_bert_long2',
EvaluationMetric.MICRO_F1_SCORE,
learning_rate=0.1,
mini_batch_size=32,
max_epochs=1000,
test_mode=True)
# trainer.train('resources/taggers/famulus_test', EvaluationMetric.MICRO_F1_SCORE, learning_rate=0.001, mini_batch_size=32,
# max_epochs=100, test_mode=True)
plotter = Plotter()
plotter.plot_training_curves(
'resources/taggers/famulus_eda_test_n_bert_long2/loss.tsv')
plotter.plot_weights(
'resources/taggers/famulus_eda_test_n_bert_long2/weights.txt')
def train_sequence_labeling_model(data_folder, proposed_tags_vocabulary_size,
skf_split_no):
"""
Trains the sequence labeling model (by default model uses one RNN layer).
Model is trained to predict part of speech tag and takes into account information about:
- text (plain text made of tokens that together form a sentence),
- occurrence of separator before token,
- proposed tags for given token.
It is trained with use of Stacked Embeddings used to combine different embeddings together. Words are embedded
using a concatenation of two vector embeddings:
- Flair Embeddings - contextual string embeddings that capture latent syntactic-semantic
information that goes beyond standard word embeddings. Key differences are: (1) they are trained without any
explicit notion of words and thus fundamentally model words as sequences of characters. And (2) they are
contextualized by their surrounding text, meaning that the same word will have different embeddings depending on
its contextual use.
There are forward (that goes through the given on input plain text form left to right) and backward model (that
goes through the given on input plain text form right to left) used for part of speech (pos) tag training.
- One Hot Embeddings - embeddings that encode each word in a vocabulary as a one-hot vector, followed by an
embedding layer. These embeddings thus do not encode any prior knowledge as do most other embeddings. They also
differ in that they require to see a Corpus during instantiation, so they can build up a vocabulary consisting of
the most common words seen in the corpus, plus an UNK token for all rare words.
There are two One Hot Embeddings used in training:
- first to embed information about occurrence of separator before token,
- second to embed information about concatenated with a ';' proposed tags.
Model and training logs are saved in resources/taggers/example-pos directory.
This is the method where internal states of forward and backward Flair models are taken at the end of each token
and, supplemented by information about occurrence of separator before token and proposed tags for given token used
to train model for one of stratified 10 fold cross validation splits.
:param data_folder: folder where files with column corpus split are stored. Those columns are used to initialize
ColumnCorpus object
:param proposed_tags_vocabulary_size: number of proposed tags
:param skf_split_no: number that indicates one of stratified 10 fold cross validation splits (from range 1 to 10)
used to train the model
"""
# define columns
columns = {0: 'text', 1: 'pos', 2: 'is_separator', 3: 'proposed_tags'}
# init a corpus using column format, data folder and the names of the train and test files
# 1. get the corpus
corpus: Corpus = ColumnCorpus(data_folder,
columns,
train_file='train_' + str(skf_split_no),
test_file='test_' + str(skf_split_no),
dev_file=None)
log.info(corpus)
# 2. what tag do we want to predict
tag_type = 'pos'
# 3. make the tag dictionary from the corpus
tag_dictionary = corpus.make_tag_dictionary(tag_type=tag_type)
log.info(tag_dictionary)
# 4. initialize embeddings
embedding_types: List[TokenEmbeddings] = [
FlairEmbeddings('pl-forward', chars_per_chunk=64),
FlairEmbeddings('pl-backward', chars_per_chunk=64),
OneHotEmbeddings(corpus=corpus,
field='is_separator',
embedding_length=3,
min_freq=3),
OneHotEmbeddings(corpus=corpus,
field='proposed_tags',
embedding_length=math.ceil(
(proposed_tags_vocabulary_size + 1)**0.25),
min_freq=3)
]
embeddings: StackedEmbeddings = StackedEmbeddings(
embeddings=embedding_types)
# 5. initialize sequence tagger
tagger: SequenceTagger = SequenceTagger(hidden_size=256,
embeddings=embeddings,
tag_dictionary=tag_dictionary,
tag_type=tag_type,
use_crf=False,
rnn_layers=1)
# 6. initialize trainer
trainer: ModelTrainer = ModelTrainer(tagger, corpus)
# 7. start training
trainer.train(
use_scratch_dir_if_available('resources/taggers/example-pos/it-' +
str(skf_split_no)),
learning_rate=0.1,
mini_batch_size=32,
embeddings_storage_mode='gpu',
max_epochs=sys.maxsize,
monitor_test=True)
# 8. plot weight traces (optional)
plotter = Plotter()
plotter.plot_weights(
use_scratch_dir_if_available('resources/taggers/example-pos/it-' +
str(skf_split_no) + '/weights.txt'))
CharacterEmbeddings(),
WordEmbeddings("tmp/glove.1.8G.bin")
]
embeddings: StackedEmbeddings = StackedEmbeddings(embeddings=embedding_types)
# 5. initialize sequence tagger
from flair.models import SequenceTagger
tagger: SequenceTagger = SequenceTagger(hidden_size=1024,
embeddings=embeddings,
tag_dictionary=tag_dictionary,
tag_type=tag_type,
use_crf=True)
# 6. initialize trainer
from flair.trainers import SequenceTaggerTrainer
trainer: SequenceTaggerTrainer = SequenceTaggerTrainer(tagger, corpus)
# 7. start training
model_path = "tmp/model2"
trainer.train(model_path, learning_rate=0.1, mini_batch_size=8, max_epochs=150)
# 8. plot training curves (optional)
from flair.visual.training_curves import Plotter
plotter = Plotter()
plotter.plot_training_curves(f'{model_path}/loss.tsv')
plotter.plot_weights(f'{model_path}/weights.txt')
def main(train_file):
# 1. get the corpus
# define columns
columns = {0: 'text', 1: '', 2: '', 3: 'ner'}
# this is the folder in which train, test and dev files reside
data_folder = './eng_data_mini_onefile/'
# retrieve corpus using column format, data folder and the names of the train, dev and test files
corpus: TaggedCorpus = NLPTaskDataFetcher.load_column_corpus(
data_folder,
columns,
train_file=train_file,
test_file='eng.testb',
dev_file='eng.testa')
print(corpus)
# 2. what tag do we want to predict?
tag_type = 'ner'
# 3. make the tag dictionary from the corpus
tag_dictionary = corpus.make_tag_dictionary(tag_type=tag_type)
print(tag_dictionary.idx2item)
# 4. initialize embeddings
embedding_types: List[TokenEmbeddings] = [
WordEmbeddings('glove'),
# comment in this line to use character embeddings
# CharacterEmbeddings(),
# comment in these lines to use flair embeddings
# FlairEmbeddings('news-forward'),
# FlairEmbeddings('news-backward'),
]
embeddings: StackedEmbeddings = StackedEmbeddings(
embeddings=embedding_types)
# 5. initialize sequence tagger
from flair.models import SequenceTagger
tagger: SequenceTagger = SequenceTagger(hidden_size=256,
embeddings=embeddings,
tag_dictionary=tag_dictionary,
tag_type=tag_type,
use_crf=True)
# 6. initialize trainer
from flair.trainers import ModelTrainer
trainer: ModelTrainer = ModelTrainer(tagger, corpus)
# 7. start training
trainer.train('resources/taggers/example-ner',
learning_rate=0.1,
mini_batch_size=32,
max_epochs=150)
# 8. plot training curves (optional)
from flair.visual.training_curves import Plotter
plotter = Plotter()
plotter.plot_training_curves('resources/taggers/example-ner/loss.tsv')
plotter.plot_weights('resources/taggers/example-ner/weights.txt')
]
# 4. init document embedding by passing list of word embeddings
document_embeddings: DocumentLSTMEmbeddings = DocumentLSTMEmbeddings(
word_embeddings,
hidden_size=512,
reproject_words=True,
reproject_words_dimension=256,
)
# 5. create the text classifier
classifier = TextClassifier(document_embeddings,
label_dictionary=label_dict,
multi_label=True)
# 6. initialize the text classifier trainer
trainer = ModelTrainer(classifier, corpus)
# 7. start the training
trainer.train('C:/Users/jeanc/Documents/reviews/model',
learning_rate=0.1,
mini_batch_size=32,
anneal_factor=0.5,
patience=5,
max_epochs=150)
# 8. plot training curves (optional)
plotter = Plotter()
plotter.plot_training_curves('C:/Users/jeanc/Documents/reviews/model/loss.tsv')
plotter.plot_weights('C:/Users/jeanc/Documents/reviews/model/weights.txt')
