Source code for deeppavlov.models.preprocessors.russian_lemmatizer

# Copyright 2017 Neural Networks and Deep Learning lab, MIPT
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
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#     http://www.apache.org/licenses/LICENSE-2.0
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# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
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from deeppavlov.core.models.component import Component
from deeppavlov.core.common.registry import register
import pymorphy2


[docs]@register('pymorphy_russian_lemmatizer') class PymorphyRussianLemmatizer(Component): """Class for lemmatization using PyMorphy.""" def __init__(self, *args, **kwargs): self.lemmatizer = pymorphy2.MorphAnalyzer() def __call__(self, tokens_batch, **kwargs): """Takes batch of tokens and returns the lemmatized tokens.""" lemma_batch = [] for utterance in tokens_batch: lemma_utterance = [] for token in utterance: p = self.lemmatizer.parse(token)[0] lemma_utterance.append(p.normal_form) lemma_batch.append(lemma_utterance) return lemma_batch