mirror of https://github.com/explosion/spaCy.git
61 lines
2.1 KiB
Python
61 lines
2.1 KiB
Python
from __future__ import absolute_import
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from __future__ import unicode_literals
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import random
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from .gold import GoldParse
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from .scorer import Scorer
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class Trainer(object):
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'''Manage training of an NLP pipeline.'''
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def __init__(self, nlp, gold_tuples):
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self.nlp = nlp
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self.gold_tuples = gold_tuples
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def epochs(self, nr_epoch, augment_data=None):
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def _epoch():
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for raw_text, paragraph_tuples in self.gold_tuples:
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if augment_data is not None:
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raw_text, paragraph_tuples = augment_data(raw_text, paragraph_tuples)
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docs = self.make_docs(raw_text, paragraph_tuples)
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golds = self.make_golds(docs, paragraph_tuples)
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for doc, gold in zip(docs, golds):
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yield doc, gold
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for itn in range(nr_epoch):
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random.shuffle(self.gold_tuples)
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yield _epoch()
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def update(self, doc, gold):
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for process in self.nlp.pipeline[1:]:
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if hasattr(process, 'update'):
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process.update(doc, gold)
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process(doc)
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return doc
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def evaluate(self, dev_sents):
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scorer = Scorer()
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for raw_text, paragraph_tuples in dev_sents:
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docs = self.make_docs(raw_text, paragraph_tuples)
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golds = self.make_golds(docs, paragraph_tuples)
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for doc, gold in zip(docs, golds):
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for process in self.nlp.pipeline[1:]:
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process(doc)
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scorer.score(doc, gold)
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return scorer
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def make_docs(self, raw_text, paragraph_tuples):
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if raw_text is not None:
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return [self.nlp.tokenizer(raw_text)]
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else:
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return [self.nlp.tokenizer.tokens_from_list(sent_tuples[0][1])
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for sent_tuples in paragraph_tuples]
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def make_golds(self, docs, paragraph_tuples):
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if len(docs) == 1:
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return [GoldParse(docs[0], sent_tuples[0])
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for sent_tuples in paragraph_tuples]
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else:
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return [GoldParse(doc, sent_tuples[0])
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for doc, sent_tuples in zip(docs, paragraph_tuples)]
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