def _make_gold(nlp, text, sent_annots, drop_deps=0.0):
# Flatten the conll annotations, and adjust the head indices
flat = defaultdict(list)
sent_starts = []
for sent in sent_annots:
flat["heads"].extend(
len(flat["words"]) + head for head in sent["heads"])
for field in [
"words", "tags", "deps", "morphology", "entities", "spaces"
]:
flat[field].extend(sent[field])
sent_starts.append(True)
sent_starts.extend([False] * (len(sent["words"]) - 1))
# Construct text if necessary
assert len(flat["words"]) == len(flat["spaces"])
if text is None:
text = "".join(word + " " * space
for word, space in zip(flat["words"], flat["spaces"]))
doc = nlp.make_doc(text)
flat.pop("spaces")
gold = GoldParse(doc, **flat)
gold.sent_starts = sent_starts
for i in range(len(gold.heads)):
if random.random() < drop_deps:
gold.heads[i] = None
gold.labels[i] = None
return doc, gold
def Train():
print("\nThe outcomes of Training and Updating are:")
from spacy.tokens import Doc
from spacy.vocab import Vocab
from spacy.gold import GoldParse
vocab = Vocab(tag_map={'N': {'pos': 'NOUN'}, 'V': {'pos': 'VERB'}})
doc = Doc(vocab, words=['用户', '体验', 'APP'])
gold = GoldParse(doc, tags=['N', 'V', 'N'])
doc = Doc(Vocab(), words=['陆金所', '成立', 'AI实验室', '已经', '一年'])
gold = GoldParse(doc,
entities=['U-ORG', 'O', 'U-TECHNOLOGY', 'O', 'U-DATE'])
doc = Doc(nlp.vocab,
words=[u'刘强东', u'章泽天', u'大学生', u'遇见'],
spaces=[False, False, False, False])
gold = GoldParse(doc, entities=[u'PERSON', u'PERSON', u'PRODUCT', u'O'])
train_data = convert_JSON_python('/home/wangdi498/SpaCy/NER_example2.json')
with nlp.disable_pipes(*[pipe for pipe in nlp.pipe_names
if pipe != 'ner']):
optimizer = nlp.begin_training()
for i in range(10):
random.shuffle(train_data)
# 每轮都会shuffle训练数据，保证模型不会根据训练顺序来做generalizations。也可以设置dropout rate让模型以一定几率放弃一些features和representations来避免模型过牢地记住训练数据。
for text, annotations in train_data:
# doc = nlp.make_doc(text)
# gold = GoldParse(doc, entities=entity_offsets)
# nlp.update([doc], [gold], drop=0.5, sgd=optimizer)
nlp.update([text], [annotations], sgd=optimizer) # 用得到的数据更新模型。
nlp.to_disk("/home/wangdi498/SpaCy/models")
def _make_gold(nlp, text, sent_annots, drop_deps=0.0):
# Flatten the conll annotations, and adjust the head indices
flat = defaultdict(list)
sent_starts = []
for sent in sent_annots:
flat["heads"].extend(len(flat["words"]) + head for head in sent["heads"])
for field in ["words", "tags", "deps", "entities", "spaces"]:
flat[field].extend(sent[field])
sent_starts.append(True)
sent_starts.extend([False] * (len(sent["words"]) - 1))
# Construct text if necessary
assert len(flat["words"]) == len(flat["spaces"])
if text is None:
text = "".join(
word + " " * space for word, space in zip(flat["words"], flat["spaces"])
)
doc = nlp.make_doc(text)
flat.pop("spaces")
gold = GoldParse(doc, **flat)
gold.sent_starts = sent_starts
for i in range(len(gold.heads)):
if random.random() < drop_deps:
gold.heads[i] = None
gold.labels[i] = None
return doc, gold
def train_ner(_nlp, train_data, iterations, learn_rate=1e-3, dropout=0., tags_complete=True):
"""
Train spacy entity recogniser (either the new on or update existing _nlp.entity)
:param _nlp: spacy.lang.Language class, containing EntityRecogniser which is to be trained
:param train_data: dataset in spacy format for training
:param iterations: num of full iterations through the dataset
:param learn_rate:
:param dropout:
:param tags_complete: if True, then assume that provided entity tags are complete
:return:
"""
_nlp.entity.model.learn_rate = learn_rate
for itn in range(1, iterations+1):
random.shuffle(train_data)
loss = 0.
for old_doc, entity_offsets in train_data:
doc = _nlp.make_doc(old_doc.text) # it is needed despite that the data is already preprocessed (by _nlp() call)
gold = GoldParse(doc, entities=entity_offsets)
# By default, the GoldParse class assumes that the entities
# described by offset are complete, and all other words should
# have the tag 'O'. You can tell it to make no assumptions
# about the tag of a word by giving it the tag '-'.
if not tags_complete:
for i in range(len(gold.ner)):
if gold.ner[i] == 'O':
gold.ner[i] = '-'
_nlp.tagger(doc) # todo: why is that? is it needed for updating existing? is it needed for new model?
loss += _nlp.entity.update(doc, gold, drop=dropout)
log.info('train_ner: iter #{}/{}, loss: {}'.format(itn, iterations, loss))
if loss == 0:
break
def test_get_oracle_moves_negative_O(tsys, vocab):
doc = Doc(vocab, words=["A", "B", "C", "D"])
gold = GoldParse(doc, entities=[])
gold.ner = ["O", "!O", "O", "!O"]
tsys.preprocess_gold(gold)
act_classes = tsys.get_oracle_sequence(doc, gold)
names = [tsys.get_class_name(act) for act in act_classes]
assert names
def test_get_oracle_moves_negative_O(tsys, vocab):
doc = Doc(vocab, words=["A", "B", "C", "D"])
gold = GoldParse(doc, entities=[])
gold.ner = ["O", "!O", "O", "!O"]
tsys.preprocess_gold(gold)
act_classes = tsys.get_oracle_sequence(doc, gold)
names = [tsys.get_class_name(act) for act in act_classes]
assert names
def test_get_oracle_moves_negative_entities(tsys, doc, entity_annots):
entity_annots = [(s, e, "!" + label) for s, e, label in entity_annots]
gold = GoldParse(doc, entities=entity_annots)
for i, tag in enumerate(gold.ner):
if tag == "L-!GPE":
gold.ner[i] = "-"
tsys.preprocess_gold(gold)
act_classes = tsys.get_oracle_sequence(doc, gold)
names = [tsys.get_class_name(act) for act in act_classes]
assert names
def test_get_oracle_moves_negative_entities(tsys, doc, entity_annots):
entity_annots = [(s, e, "!" + label) for s, e, label in entity_annots]
gold = GoldParse(doc, entities=entity_annots)
for i, tag in enumerate(gold.ner):
if tag == "L-!GPE":
gold.ner[i] = "-"
tsys.preprocess_gold(gold)
act_classes = tsys.get_oracle_sequence(doc, gold)
names = [tsys.get_class_name(act) for act in act_classes]
assert names
def test_ner_update_batch(ner, nlp):
doc1 = nlp("Hello world. This is sentence 2.")
doc2 = nlp("Hi again. This is sentence 4.")
ents1 = ["O"] * len(doc1)
ents2 = ["O"] * len(doc2)
assert len(list(doc1.sents)) == 2
assert len(list(doc2.sents)) == 2
optimizer = nlp.resume_training()
golds = [GoldParse(doc1, entities=ents1), GoldParse(doc2, entities=ents2)]
losses = {}
ner.update([doc1, doc2], golds, sgd=optimizer, losses=losses)
assert PIPES.ner in losses
def test_textcat_update_batch(textcat, nlp):
doc1 = nlp("Hello world. This is sentence 2.")
doc2 = nlp("Hi again. This is sentence 4.")
assert len(list(doc1.sents)) == 2
assert len(list(doc2.sents)) == 2
optimizer = nlp.resume_training()
golds = [
GoldParse(doc1, cats={"Hello": 1.0}),
GoldParse(doc2, cats={"Hello": 0.0})
]
losses = {}
textcat.update([doc1, doc2], golds, sgd=optimizer, losses=losses)
assert "pytt_textcat" in losses
def test_ner_per_type(en_vocab):
# Gold and Doc are identical
scorer = Scorer()
for input_, annot in test_ner_cardinal:
doc = get_doc(
en_vocab,
words=input_.split(" "),
ents=[[0, 1, "CARDINAL"], [2, 3, "CARDINAL"]],
)
gold = GoldParse(doc, entities=annot["entities"])
scorer.score(doc, gold)
results = scorer.scores
assert results["ents_p"] == 100
assert results["ents_f"] == 100
assert results["ents_r"] == 100
assert results["ents_per_type"]["CARDINAL"]["p"] == 100
assert results["ents_per_type"]["CARDINAL"]["f"] == 100
assert results["ents_per_type"]["CARDINAL"]["r"] == 100
# Doc has one missing and one extra entity
# Entity type MONEY is not present in Doc
scorer = Scorer()
for input_, annot in test_ner_apple:
doc = get_doc(
en_vocab,
words=input_.split(" "),
ents=[[0, 1, "ORG"], [5, 6, "GPE"], [6, 7, "ORG"]],
)
gold = GoldParse(doc, entities=annot["entities"])
scorer.score(doc, gold)
results = scorer.scores
assert results["ents_p"] == approx(66.66666)
assert results["ents_r"] == approx(66.66666)
assert results["ents_f"] == approx(66.66666)
assert "GPE" in results["ents_per_type"]
assert "MONEY" in results["ents_per_type"]
assert "ORG" in results["ents_per_type"]
assert results["ents_per_type"]["GPE"]["p"] == 100
assert results["ents_per_type"]["GPE"]["r"] == 100
assert results["ents_per_type"]["GPE"]["f"] == 100
assert results["ents_per_type"]["MONEY"]["p"] == 0
assert results["ents_per_type"]["MONEY"]["r"] == 0
assert results["ents_per_type"]["MONEY"]["f"] == 0
assert results["ents_per_type"]["ORG"]["p"] == 50
assert results["ents_per_type"]["ORG"]["r"] == 100
assert results["ents_per_type"]["ORG"]["f"] == approx(66.66666)
def evaluate(Language,
gold_tuples,
model_dir,
gold_preproc=False,
verbose=False,
beam_width=None):
nlp = Language(data_dir=model_dir)
if beam_width is not None:
nlp.parser.cfg.beam_width = beam_width
scorer = Scorer()
for raw_text, sents in gold_tuples:
if gold_preproc:
raw_text = None
else:
sents = _merge_sents(sents)
for annot_tuples, brackets in sents:
if raw_text is None:
tokens = nlp.tokenizer.tokens_from_list(annot_tuples[1])
nlp.tagger(tokens)
nlp.entity(tokens)
nlp.parser(tokens)
else:
tokens = nlp(raw_text, merge_mwes=False)
gold = GoldParse(tokens, annot_tuples)
scorer.score(tokens, gold, verbose=verbose)
return scorer
def _get_gold_parse(doc, entities, dev, kb, labels_discard):
gold_entities = {}
tagged_ent_positions = {(ent.start_char, ent.end_char): ent
for ent in doc.ents
if ent.label_ not in labels_discard}
for entity in entities:
entity_id = entity["entity"]
alias = entity["alias"]
start = entity["start"]
end = entity["end"]
candidate_ids = []
if kb and not dev:
candidates = kb.get_candidates(alias)
candidate_ids = [cand.entity_ for cand in candidates]
tagged_ent = tagged_ent_positions.get((start, end), None)
if tagged_ent:
# TODO: check that alias == doc.text[start:end]
should_add_ent = (dev or entity_id
in candidate_ids) and is_valid_sentence(
tagged_ent.sent.text)
if should_add_ent:
value_by_id = {entity_id: 1.0}
if not dev:
random.shuffle(candidate_ids)
value_by_id.update({
kb_id: 0.0
for kb_id in candidate_ids if kb_id != entity_id
})
gold_entities[(start, end)] = value_by_id
return GoldParse(doc, links=gold_entities)
def test_goldparse_startswith_space(en_tokenizer):
text = " a"
doc = en_tokenizer(text)
g = GoldParse(doc, words=["a"], entities=["U-DATE"], deps=["ROOT"], heads=[0])
assert g.words == [" ", "a"]
assert g.ner == [None, "U-DATE"]
assert g.labels == [None, "ROOT"]
def train_recognizer(self):
# Tentons une technique de NER par patrons en utilisant la librairie spaCy
comp = self.nlp.create_pipe('ner')
self.nlp.add_pipe(comp)
comp.add_label("Task")
comp.add_label("Material")
comp.add_label("Process")
# nlp.from_disk('C:/Users/Lobar/Desktop/TP3_NLP/spacy_models')
optimizer = self.nlp.begin_training()
losses = {}
for training in self.data.data_train:
f = open(self.repertory + self.train_file + "/" + training[0],
'r',
encoding="utf-8")
text = f.readlines()
text = text[0]
entities = []
for ent in training[1]:
if ent[0] == "T":
splitted = re.split(r'\W+', ent[1])
entity = (int(splitted[1]), int(splitted[2]), splitted[0])
entities.append(entity)
doc = self.nlp.make_doc(text)
gold = GoldParse(doc, entities=entities)
self.nlp.update([doc], [gold],
drop=0.5,
losses=losses,
sgd=optimizer)
f.close()
''' A MODIFIER LE CHEMIN D'ACCES '''
self.nlp.to_disk(
"C:\\Users\\Lobar\\Desktop\\TP3_NLP\\spacy_models")
def _from_json_to_crf(self, message, entity_offsets):
# type: (Message, List[Tuple[int, int, Text]]) -> List[Tuple[Text, Text, Text, Text]]
"""Takes the json examples and switches them to a format which crfsuite likes."""
from spacy.gold import GoldParse
doc = message.get("spacy_doc")
gold = GoldParse(doc, entities=entity_offsets)
ents = [l[5] for l in gold.orig_annot]
if '-' in ents:
logger.warn(
"Misaligned entity annotation in sentence '{}'. ".format(
doc.text) +
"Make sure the start and end values of the annotated training "
+
"examples end at token boundaries (e.g. don't include trailing whitespaces)."
)
if not self.BILOU_flag:
for i, entity in enumerate(ents):
if entity.startswith('B-') or \
entity.startswith('I-') or \
entity.startswith('U-') or \
entity.startswith('L-'):
ents[i] = entity[2:] # removes the BILOU tags
return self._from_text_to_crf(message, ents)
def _from_json_to_crf(self, json_eg, spacy_nlp):
# type: (Tuple[Text, List[Tuple[int, int, Text]]], Language) -> List[Tuple[Text, Text, Text]]
"""Takes the json examples and switches them to a format which crfsuite likes."""
from spacy.language import Language
from spacy.gold import GoldParse
doc = spacy_nlp(json_eg[0])
entity_offsets = json_eg[1]
gold = GoldParse(doc, entities=entity_offsets)
ents = [l[5] for l in gold.orig_annot]
if '-' in ents:
logger.warn("Misaligned entity annotation in sentence '{}'. ".format(doc.text) +
"Make sure the start and end values of the annotated training " +
"examples end at token boundaries (e.g. don't include trailing whitespaces).")
if not self.BILOU_flag:
def ent_clean(entity):
if entity.startswith('B-') or entity.startswith('I-') or entity.startswith('U-') or entity.startswith(
'L-'):
return entity[2:]
else:
return entity
else:
def ent_clean(entity):
return entity
crf_format = [(doc[i].text, doc[i].tag_, ent_clean(ents[i])) for i in range(len(doc))]
return crf_format
def main(output_dir=None):
if output_dir is not None:
output_dir = Path(output_dir)
ensure_dir(output_dir)
ensure_dir(output_dir / "pos")
ensure_dir(output_dir / "vocab")
vocab = Vocab(tag_map=TAG_MAP)
# The default_templates argument is where features are specified. See
# spacy/tagger.pyx for the defaults.
tagger = Tagger(vocab)
for i in range(25):
for words, tags in DATA:
doc = Doc(vocab, words=words)
gold = GoldParse(doc, tags=tags)
tagger.update(doc, gold)
random.shuffle(DATA)
tagger.model.end_training()
doc = Doc(vocab,
orths_and_spaces=zip(["I", "like", "blue", "eggs"], [True] * 4))
tagger(doc)
for word in doc:
print(word.text, word.tag_, word.pos_)
if output_dir is not None:
tagger.model.dump(str(output_dir / 'pos' / 'model'))
with (output_dir / 'vocab' / 'strings.json').open('w') as file_:
tagger.vocab.strings.dump(file_)
def main(n_iter=10):
nlp = spacy.blank('en')
ner = nlp.create_pipe('ner')
ner.add_multitask_objective(get_position_label)
nlp.add_pipe(ner)
print("Create data", len(TRAIN_DATA))
optimizer = nlp.begin_training(get_gold_tuples=lambda: TRAIN_DATA)
for itn in range(n_iter):
random.shuffle(TRAIN_DATA)
losses = {}
for text, annot_brackets in TRAIN_DATA:
annotations, _ = annot_brackets
doc = nlp.make_doc(text)
gold = GoldParse.from_annot_tuples(doc, annotations[0])
nlp.update(
[doc], # batch of texts
[gold], # batch of annotations
drop=0.2, # dropout - make it harder to memorise data
sgd=optimizer, # callable to update weights
losses=losses)
print(losses.get('nn_labeller', 0.0), losses['ner'])
# test the trained model
for text, _ in TRAIN_DATA:
doc = nlp(text)
print('Entities', [(ent.text, ent.label_) for ent in doc.ents])
print('Tokens', [(t.text, t.ent_type_, t.ent_iob) for t in doc])
def train_NER(train_data, t1Files):
nlp = spacy.load('en', entity=False, parser=False)
ner = EntityRecognizer(nlp.vocab,
entity_types=[
'ID', 'INCIDENT', 'WEAPON', 'PERP INDIV',
'PERP ORG', 'TARGET', 'VICTIM'
])
for itn in range(5):
random.shuffle(train_data)
for raw_text, entity_offset in train_data:
doc = nlp.make_doc(raw_text)
gold = GoldParse(doc, entities=entity_offset)
nlp.tagger(doc)
ner.update(doc, gold)
ner.model.end_training()
for i in range(len(t1Files)):
test_file_sentences = t1Files[i][1][1]
for j in range(len(test_file_sentences)):
s = unicode(test_file_sentences[j])
doc = nlp(s, entity=False)
ner(doc)
print("Entites on fine tuned NER:")
for word in doc:
print(word.text, word.orth, word.lower, word.tag_,
word.ent_type_, word.ent_iob)
def train_model(labels, examples, epochs=10, verbose=False):
nlp = spacy.blank('ru')
ner = create_ner(nlp)
nlp.add_pipe(ner, last=True)
for l in labels:
print("Label:", l)
ner.add_label(l)
optimizer = nlp.begin_training()
if verbose:
print("Training data:")
for t in examples:
# print(t['text'])
for ls, le, lt in t['labels']:
print('{} : "{}"'.format(lt, t['text'][ls: le]))
for e in tqdm(range(epochs)):
for batch in minibatch([e for e in examples], size=1):
# print([t['labels'] for t in batch])
docs = [nlp.tokenizer(t['text']) for t in batch]
goldparses = [GoldParse(d, entities=t['labels']) for d, t in zip(docs, batch)]
losses = {}
nlp.update(docs, goldparses, drop=0.5, losses=losses, sgd=optimizer)
return nlp
def _update_ner_model(self, ner, nlp, train_data):
for itn in range(5):
random.shuffle(train_data)
for raw_text, entity_offsets in train_data:
doc = nlp.make_doc(raw_text)
gold = GoldParse(doc, entities=entity_offsets)
ner.update(doc, gold)
def extract_docs_and_golds_from_opencorpora(nlp, opencorpora_file):
parsed_sentences = []
gold_sentences = []
with open(opencorpora_file, "r") as f:
opencorpora = f.read().encode('utf-8')
page_tree = html.fromstring(opencorpora)
for text in page_tree.xpath('//text'):
for paragraphs in text.xpath('./paragraphs'):
for paragraph in paragraphs.xpath('./paragraph'):
for sentence in paragraph.xpath('./sentence'):
text = sentence.xpath('./source')[0].text
parsed_sentences.append(nlp(text))
sent_words = [
token.attrib['text']
for token in sentence.xpath('./tokens/token')
]
gold = GoldParse(
Doc(nlp.vocab, words=sent_words),
words=sent_words, # heads=sent_heads,
# tags=sent_tags, deps=sent_deps,
entities=['-'] * len(sent_words))
gold_sentences.append(gold)
return parsed_sentences, gold_sentences
def evaluate(self, verbose=1):
"""Do evaluation on test data
Parameters
----------
verbose : bool
print out the wrong case from prediction
"""
scorer = Scorer()
wrong_case = 0
for input_, annot in self.data:
doc_gold_text = self.nlp.make_doc(input_)
gold = GoldParse(doc_gold_text, entities=annot['entities'])
pred_value = self.nlp(input_)
#return gold
current_score = scorer.ents_f
scorer.score(pred_value, gold)
if (current_score > scorer.ents_f):
wrong_case += 1
if (verbose == 1):
print_beauty_NER(prediction_to_IOB(pred_value, gold))
current_score = scorer.ents_f
return scorer.scores #, wrong_case, len(self.data)
def evaluate(Language,
gold_tuples,
model_dir,
gold_preproc=False,
verbose=False,
beam_width=None,
cand_preproc=None):
nlp = Language(data_dir=model_dir)
if nlp.lang == 'de':
nlp.vocab.morphology.lemmatizer = lambda string, pos: set([string])
if beam_width is not None:
nlp.parser.cfg.beam_width = beam_width
scorer = Scorer()
for raw_text, sents in gold_tuples:
if gold_preproc:
raw_text = None
else:
sents = _merge_sents(sents)
for annot_tuples, brackets in sents:
if raw_text is None:
tokens = nlp.tokenizer.tokens_from_list(annot_tuples[1])
nlp.tagger(tokens)
nlp.parser(tokens)
nlp.entity(tokens)
else:
tokens = nlp(raw_text)
gold = GoldParse(tokens, annot_tuples)
scorer.score(tokens, gold, verbose=verbose)
return scorer
def test_textcat_learns_multilabel():
random.seed(5)
numpy.random.seed(5)
docs = []
nlp = Language()
letters = ["a", "b", "c"]
for w1 in letters:
for w2 in letters:
cats = {letter: float(w2 == letter) for letter in letters}
docs.append((Doc(nlp.vocab, words=["d"] * 3 + [w1, w2] + ["d"] * 3), cats))
random.shuffle(docs)
model = TextCategorizer(nlp.vocab, width=8)
for letter in letters:
model.add_label(letter)
optimizer = model.begin_training()
for i in range(30):
losses = {}
Ys = [GoldParse(doc, cats=cats) for doc, cats in docs]
Xs = [doc for doc, cats in docs]
model.update(Xs, Ys, sgd=optimizer, losses=losses)
random.shuffle(docs)
for w1 in letters:
for w2 in letters:
doc = Doc(nlp.vocab, words=["d"] * 3 + [w1, w2] + ["d"] * 3)
truth = {letter: w2 == letter for letter in letters}
model(doc)
for cat, score in doc.cats.items():
if not truth[cat]:
assert score < 0.5
else:
assert score > 0.5
def main(n_iter=10):
nlp = spacy.blank("en")
ner = nlp.create_pipe("ner")
ner.add_multitask_objective(get_position_label)
nlp.add_pipe(ner)
print(nlp.pipeline)
print("Create data", len(TRAIN_DATA))
optimizer = nlp.begin_training(get_gold_tuples=lambda: TRAIN_DATA)
for itn in range(n_iter):
random.shuffle(TRAIN_DATA)
losses = {}
for text, annot_brackets in TRAIN_DATA:
for annotations, _ in annot_brackets:
doc = Doc(nlp.vocab, words=annotations[1])
gold = GoldParse.from_annot_tuples(doc, annotations)
nlp.update(
[doc], # batch of texts
[gold], # batch of annotations
drop=0.2, # dropout - make it harder to memorise data
sgd=optimizer, # callable to update weights
losses=losses,
)
print(losses.get("nn_labeller", 0.0), losses["ner"])
# test the trained model
for text, _ in TRAIN_DATA:
if text is not None:
doc = nlp(text)
print("Entities", [(ent.text, ent.label_) for ent in doc.ents])
print("Tokens", [(t.text, t.ent_type_, t.ent_iob) for t in doc])
def test_tokenizer():
doc: Doc = pytest.nlp.make_doc("Ceci est un test.")
offsets = [(0, 4, "PERS"), (9, 11, "PERS")]
gold: GoldParse = GoldParse(doc, entities=offsets)
word_extracted = [doc.char_span(o[0], o[1]) for o in offsets]
count_ent = sum([1 for item in gold.ner if item != "O"])
assert count_ent == len(word_extracted)
offsets = [(0, 4, "PERS"), (9, 12, "PERS")]
gold: GoldParse = GoldParse(doc, entities=offsets)
word_extracted = [
doc.char_span(o[0], o[1]) for o in offsets
if doc.char_span(o[0], o[1]) is not None
]
count_ent = sum([1 for item in gold.ner if item != "O"])
assert count_ent > len(word_extracted)
def _from_json_to_crf(self, json_eg, spacy_nlp):
# type: (Tuple[Text, List[Tuple[int, int, Text]]], Language) -> List[Tuple[Text, Text, Text]]
"""Takes the json examples and switches them to a format which crfsuite likes."""
from spacy.language import Language
from spacy.gold import GoldParse
doc = spacy_nlp(json_eg[0])
entity_offsets = json_eg[1]
gold = GoldParse(doc, entities=entity_offsets)
ents = [l[5] for l in gold.orig_annot]
if not self.BILOU_flag:
def ent_clean(entity):
if entity.startswith('B-') or entity.startswith(
'I-') or entity.startswith('U-') or entity.startswith(
'L-'):
return entity[2:]
else:
return entity
else:
def ent_clean(entity):
return entity
crf_format = [(doc[i].text, doc[i].tag_, ent_clean(ents[i]))
for i in range(len(doc))]
return crf_format
def evaluate_ner(self, model, eval_set, ent_types):
"""Evaluate the performance of a Named Entity model
Arguments:
model (spacy model object) -- trained Named Entity model to evaluate
eval_set (list) -- Evaluation set passed in the format
[["<doc_text>",{"entities:[[<start_pos>,<end_pos>,"<ENTITY_TYPE>"],
[<start_pos>,<end_pos>,"<ENTITY_TYPE>"]]}]]
ent_types (list) -- list with what entities types to extract
Returns:
(Spacy.scorer.scores) -- scored metrics for the model
"""
scorer = Scorer()
for data, expected_result in eval_set:
selected_entities = []
for ent in expected_result.get('entities'):
if ent[-1] in ent_types:
selected_entities.append(ent)
ground_truth_text = model.make_doc(data)
ground_truth = GoldParse(ground_truth_text,
entities=selected_entities)
pred_value = model(data)
scorer.score(pred_value, ground_truth)
return scorer.scores
def predict(self, list_data):
"""
Method that performs prediction on a given dataset
:param list_data: list of data given in the format expected by spaCy
E.g. [(This is a nice summer, {"entities":(15, 21, SEASON)})]
:return: dict_performance - dictionary where keys are precision, recall and F1 and values are the
corresponding values of such metrics
"""
# load customized NER model
nlp_custom = spacy.load(self.output_dir)
# instantiate scorer
scorer = Scorer()
# loop over list of data given
for input_, annotation_ in list_data:
doc_gold_text = nlp_custom.make_doc(input_)
gold = GoldParse(doc_gold_text, entities=annotation_['entities'])
pred_value = nlp_custom(input_)
scorer.score(pred_value, gold)
# create dictionary to be returned...
dict_perf = scorer.scores
dict_perf_out = {
'precision': dict_perf['ents_p'],
'recall': dict_perf['ents_r'],
'F1': dict_perf['ents_f']
}
self.dict_performance = dict_perf_out
# ... and return it
return self.dict_performance
def evaluate(tokenizer, nlp, valid_data, labels):
"""Evaluate model performance on a test dataset."""
texts, cats = zip(*valid_data)
golds = []
# Use the model's ops module
# to make sure this is compatible with GPU (cupy array)
# or without (numpy array)
scores = np.zeros((len(cats), len(labels)), dtype="f")
if is_transformer(nlp):
textcat = nlp.get_pipe(PIPES.textcat)
else:
textcat = nlp.get_pipe("textcat")
scores = textcat.model.ops.asarray(scores)
num_correct = 0
for i, doc in enumerate(nlp.pipe(texts)):
gold_cats = cats[i]["cats"]
for j, (label, score) in enumerate(doc.cats.items()):
if label not in gold_cats:
raise ValueError(f"Prediction for unexpected label: {label}")
scores[i, j] = score
doc_prediction = score > 0.5
if doc_prediction == bool(gold_cats[label]):
num_correct += 1
golds.append(GoldParse(doc, cats=gold_cats))
accuracy = num_correct / ((len(texts) * len(labels)) + 1e-8)
loss, _ = textcat.get_loss(texts, golds, scores)
return accuracy, loss
def _from_json_to_crf(
self,
message, # type: Message
entity_offsets # type: List[Tuple[int, int, Text]]
):
# type: (...) -> List[Tuple[Text, Text, Text, Text]]
"""Convert json examples to format of underlying crfsuite."""
from spacy.gold import GoldParse
doc = message.get("spacy_doc")
gold = GoldParse(doc, entities=entity_offsets)
ents = [l[5] for l in gold.orig_annot]
if '-' in ents:
logger.warn("Misaligned entity annotation in sentence '{}'. "
"Make sure the start and end values of the "
"annotated training examples end at token "
"boundaries (e.g. don't include trailing "
"whitespaces).".format(doc.text))
if not self.component_config["BILOU_flag"]:
for i, label in enumerate(ents):
if self._bilou_from_label(label) in {"B", "I", "U", "L"}:
# removes BILOU prefix from label
ents[i] = self._entity_from_label(label)
return self._from_text_to_crf(message, ents)
def train(nlp, data, ents, num_iterations=20):
"""
:param nlp: nlp instance
:param data: training data(look at required format below)
:param ents: list of entities
:param num_iterations: number iterations to train
:return: trained NER tagger
"""
# Example :
# train_data = [
# (
# 'Who is Shaka Khan?',
# [(len('Who is '), len('Who is Shaka Khan'), 'PERSON')]
# ), ...
# ]
for sent, _ in data:
doc = nlp.make_doc(sent)
for word in doc:
_ = nlp.vocab[word.orth]
result_NER = EntityRecognizer(nlp.vocab, entity_types=ents)
for _ in range(num_iterations):
random.shuffle(data)
for sent, entity_offsets in data:
doc = nlp.make_doc(sent)
gold = GoldParse(doc, entities=entity_offsets)
result_NER.update(doc, gold)
return result_NER
