Datasets:

shunk031
/

livedoor-news-corpus

	import logging
	import math
	import pathlib
	import random
	from dataclasses import dataclass
	from typing import Dict, List

	import datasets as ds

	logger = logging.getLogger(__name__)

	_CITATION = """\
	https://www.rondhuit.com/download.html#ldcc
	"""

	_DESCRIPTION = """\
	本コーパスは、NHN Japan株式会社が運営する「livedoor ニュース」のうち、下記のクリエイティブ・コモンズライセンスが適用されるニュース記事を収集し、可能な限りHTMLタグを取り除いて作成したものです。
	"""

	_HOMEPAGE = "https://www.rondhuit.com/download.html#ldcc"

	_LICENSE = """\
	各記事ファイルにはクリエイティブ・コモンズライセンス「表示 – 改変禁止」が適用されます。クレジット表示についてはニュースカテゴリにより異なるため、ダウンロードしたファイルを展開したサブディレクトリにあるそれぞれの LICENSE.txt をご覧ください。 livedoor はNHN Japan株式会社の登録商標です。
	"""


	_DOWNLOAD_URL = "https://www.rondhuit.com/download/ldcc-20140209.tar.gz"


	@dataclass
	class LivedoorNewsCorpusConfig(ds.BuilderConfig):
	train_ratio: float = 0.8
	val_ratio: float = 0.1
	test_ratio: float = 0.1
	shuffle: bool = False
	random_state: int = 0

	def __post_init__(self):
	assert self.train_ratio + self.val_ratio + self.test_ratio == 1.0


	class LivedoorNewsCorpusDataset(ds.GeneratorBasedBuilder):
	VERSION = ds.Version("1.0.0")
	BUILDER_CONFIG_CLASS = LivedoorNewsCorpusConfig
	BUILDER_CONFIGS = [
	LivedoorNewsCorpusConfig(
	version=VERSION,
	description="Livedoor ニュースコーパス",
	)
	]

	def _info(self) -> ds.DatasetInfo:
	features = ds.Features(
	{
	"url": ds.Value("string"),
	"date": ds.Value("string"),
	"title": ds.Value("string"),
	"content": ds.Value("string"),
	"category": ds.ClassLabel(
	names=[
	"movie-enter",
	"it-life-hack",
	"kaden-channel",
	"topic-news",
	"livedoor-homme",
	"peachy",
	"sports-watch",
	"dokujo-tsushin",
	"smax",
	]
	),
	}
	)
	return ds.DatasetInfo(
	description=_DESCRIPTION,
	citation=_CITATION,
	homepage=_HOMEPAGE,
	license=_LICENSE,
	features=features,
	)

	def _split_generators(self, dl_manager: ds.DownloadManager):
	dataset_root = dl_manager.download_and_extract(_DOWNLOAD_URL)
	dataset_root_dir = pathlib.Path(dataset_root) / "text"

	article_paths = list(dataset_root_dir.glob("//.txt"))
	article_paths = list(filter(lambda p: p.name != "LICENSE.txt", article_paths))

	config: LivedoorNewsCorpusConfig = self.config

	if config.shuffle:
	random.seed(config.random_state)
	random.shuffle(article_paths)

	num_articles = len(article_paths)
	num_tng = math.ceil(num_articles * config.train_ratio)
	num_val = math.ceil(num_articles * config.val_ratio)
	num_tst = math.ceil(num_articles * config.test_ratio)

	tng_articles = article_paths[:num_tng]
	val_articles = article_paths[num_tng : num_tng + num_val]
	tst_articles = article_paths[num_tng + num_val : num_tng + num_val + num_tst]

	assert len(tng_articles) + len(val_articles) + len(tst_articles) == num_articles

	return [
	ds.SplitGenerator(
	name=ds.Split.TRAIN, # type: ignore
	gen_kwargs={"article_paths": tng_articles},
	),
	ds.SplitGenerator(
	name=ds.Split.VALIDATION, # type: ignore
	gen_kwargs={"article_paths": val_articles},
	),
	ds.SplitGenerator(
	name=ds.Split.TEST, # type: ignore
	gen_kwargs={"article_paths": tst_articles},
	),
	]

	def parse_article(self, article_data: List[str]) -> Dict[str, str]:
	article_url = article_data[0]
	article_date = article_data[1]
	article_title = article_data[2]
	article_content = " ".join(article_data[3:])

	example_dict = {
	"url": article_url,
	"date": article_date,
	"title": article_title,
	"content": article_content,
	}
	return example_dict

	def _generate_examples(self, article_paths: List[pathlib.Path]): # type: ignore[override]
	for i, article_path in enumerate(article_paths):
	article_category = article_path.parent.name
	with open(article_path, "r") as rf:
	article_data = [line.strip() for line in rf]

	example_dict = self.parse_article(article_data=article_data)
	example_dict["category"] = article_category
	yield i, example_dict