Source code for pythainlp.augment.word2vec.core

# -*- coding: utf-8 -*-
# Copyright (C) 2016-2023 PyThaiNLP Project
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# Licensed under the Apache License, Version 2.0 (the "License");
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#     http://www.apache.org/licenses/LICENSE-2.0
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from typing import List, Tuple
import itertools


[docs]class Word2VecAug:
[docs] def __init__( self, model: str, tokenize: object, type: str = "file" ) -> None: """ :param str model: path of model :param object tokenize: tokenize function :param str type: model type (file, binary) """ import gensim.models.keyedvectors as word2vec self.tokenizer = tokenize if type == "file": self.model = word2vec.KeyedVectors.load_word2vec_format(model) elif type == "binary": self.model = word2vec.KeyedVectors.load_word2vec_format( model, binary=True, unicode_errors="ignore" ) else: self.model = model self.dict_wv = list(self.model.key_to_index.keys())
[docs] def modify_sent(self, sent: str, p: float = 0.7) -> List[List[str]]: """ :param str sent: text of sentence :param float p: probability :rtype: List[List[str]] """ list_sent_new = [] for i in sent: if i in self.dict_wv: w = [j for j, v in self.model.most_similar(i) if v >= p] if w == []: list_sent_new.append([i]) else: list_sent_new.append(w) else: list_sent_new.append([i]) return list_sent_new
[docs] def augment( self, sentence: str, n_sent: int = 1, p: float = 0.7 ) -> List[Tuple[str]]: """ :param str sentence: text of sentence :param int n_sent: maximum number of synonymous sentences :param int p: probability :return: list of synonyms :rtype: List[Tuple[str]] """ self.sentence = self.tokenizer(sentence) self.list_synonym = self.modify_sent(self.sentence, p=p) new_sentences = [] for x in list(itertools.product(*self.list_synonym))[0:n_sent]: new_sentences.append(x) return new_sentences