Source code for nlp_architect.models.absa.train.train

# ******************************************************************************
# Copyright 2017-2018 Intel Corporation
# 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
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# See the License for the specific language governing permissions and
# limitations under the License.
# ******************************************************************************
from pathlib import Path, PosixPath
from os import PathLike
from typing import Union

from nlp_architect.models.absa import TRAIN_OUT, LEXICONS_OUT
from nlp_architect.models.absa.train.acquire_terms import AcquireTerms
from nlp_architect.models.absa.train.rerank_terms import RerankTerms
from nlp_architect.models.absa.utils import parse_docs, _download_pretrained_rerank_model, \
    _write_aspect_lex, _write_opinion_lex
from import download_unzip

EMBEDDING_PATH = TRAIN_OUT / 'word_emb_unzipped' / 'glove.840B.300d.txt'
RERANK_MODEL_DEFAULT_PATH = rerank_model_dir = TRAIN_OUT / 'reranking_model' / 'rerank_model.h5'

[docs]class TrainSentiment: def __init__(self, parse: bool = True, rerank_model: PathLike = None, asp_thresh: int = 3, op_thresh: int = 2, max_iter: int = 3): self.acquire_lexicon = AcquireTerms(asp_thresh, op_thresh, max_iter) if parse: from nlp_architect.pipelines.spacy_bist import SpacyBISTParser self.parser = SpacyBISTParser() else: self.parser = None if not rerank_model: print('using pre-trained reranking model') rerank_model = _download_pretrained_rerank_model(RERANK_MODEL_DEFAULT_PATH) download_unzip(*EMBEDDING_URL, EMBEDDING_PATH, license_msg="Glove word embeddings.") self.rerank = RerankTerms(vector_cache=True, rerank_model=rerank_model, emb_model_path=EMBEDDING_PATH)
[docs] def run(self, data: Union[str, PathLike] = None, parsed_data: Union[str, PathLike] = None, out_dir: Union[str, PathLike] = TRAIN_OUT): if not parsed_data: if not self.parser: raise RuntimeError("Parser not initialized (try parse=True at init)") parsed_dir = Path(out_dir) / 'parsed' / Path(data).stem parsed_data = self.parse_data(data, parsed_dir) generated_aspect_lex = self.acquire_lexicon.acquire_lexicons(parsed_data) _write_aspect_lex(parsed_data, generated_aspect_lex, LEXICONS_OUT) generated_opinion_lex_reranked = \ self.rerank.predict(AcquireTerms.acquired_opinion_terms_path, AcquireTerms.generic_opinion_lex_path) _write_opinion_lex(parsed_data, generated_opinion_lex_reranked, LEXICONS_OUT) return generated_opinion_lex_reranked, generated_aspect_lex
[docs] def parse_data(self, data: PathLike or PosixPath, parsed_dir: PathLike or PosixPath): _, data_size = parse_docs(self.parser, data, out_dir=parsed_dir) if data_size < 1000: raise ValueError('The data contains only {0} sentences. A minimum of 1000 ' 'sentences is required for training.'.format(data_size)) return parsed_dir