Datasets:
ted_iwlst2013

	# coding=utf-8
	# Copyright 2020 HuggingFace Datasets Authors.
	#
	# 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
	#
	# http://www.apache.org/licenses/LICENSE-2.0
	#
	# Unless required by applicable law or agreed to in writing, software
	# distributed under the License is distributed on an "AS IS" BASIS,
	# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	# See the License for the specific language governing permissions and
	# limitations under the License.

	# Lint as: python3
	import os

	import datasets


	_DESCRIPTION = """\
	A parallel corpus of TED talk subtitles provided by CASMACAT: http://www.casmacat.eu/corpus/ted2013.html. The files are originally provided by https://wit3.fbk.eu.

	15 languages, 14 bitexts
	total number of files: 28
	total number of tokens: 67.67M
	total number of sentence fragments: 3.81M
	"""
	_HOMEPAGE_URL = "http://opus.nlpl.eu/TED2013.php"
	_CITATION = """\
	J. Tiedemann, 2012, Parallel Data, Tools and Interfaces in OPUS. In Proceedings of the 8th International Conference on Language Resources and Evaluation (LREC 2012)
	"""

	_VERSION = "1.1.0"
	_BASE_NAME = "TED2013.{}.{}"

	_LANGUAGE_PAIRS = {
	("ar", "en"): "https://object.pouta.csc.fi/OPUS-TED2013/v1.1/moses/ar-en.txt.zip",
	("de", "en"): "https://object.pouta.csc.fi/OPUS-TED2013/v1.1/moses/de-en.txt.zip",
	("en", "es"): "https://object.pouta.csc.fi/OPUS-TED2013/v1.1/moses/en-es.txt.zip",
	("en", "fa"): "https://object.pouta.csc.fi/OPUS-TED2013/v1.1/moses/en-fa.txt.zip",
	("en", "fr"): "https://object.pouta.csc.fi/OPUS-TED2013/v1.1/moses/en-fr.txt.zip",
	("en", "it"): "https://object.pouta.csc.fi/OPUS-TED2013/v1.1/moses/en-it.txt.zip",
	("en", "nl"): "https://object.pouta.csc.fi/OPUS-TED2013/v1.1/moses/en-nl.txt.zip",
	("en", "pl"): "https://object.pouta.csc.fi/OPUS-TED2013/v1.1/moses/en-pl.txt.zip",
	("en", "pt"): "https://object.pouta.csc.fi/OPUS-TED2013/v1.1/moses/en-pt.txt.zip",
	("en", "ro"): "https://object.pouta.csc.fi/OPUS-TED2013/v1.1/moses/en-ro.txt.zip",
	("en", "ru"): "https://object.pouta.csc.fi/OPUS-TED2013/v1.1/moses/en-ru.txt.zip",
	("en", "sl"): "https://object.pouta.csc.fi/OPUS-TED2013/v1.1/moses/en-sl.txt.zip",
	("en", "tr"): "https://object.pouta.csc.fi/OPUS-TED2013/v1.1/moses/en-tr.txt.zip",
	("en", "zh"): "https://object.pouta.csc.fi/OPUS-TED2013/v1.1/moses/en-zh.txt.zip",
	}


	class TedIwlst2013Config(datasets.BuilderConfig):
	def __init__(self, args, *kwargs):
	super().__init__(args, *kwargs)


	class TedIwlst2013(datasets.GeneratorBasedBuilder):
	BUILDER_CONFIGS = [
	TedIwlst2013Config(
	name=f"{lang1}-{lang2}",
	description=f"Translating {lang1} to {lang2} or vice versa",
	version=datasets.Version(_VERSION),
	)
	for lang1, lang2 in _LANGUAGE_PAIRS.keys()
	]
	BUILDER_CONFIG_CLASS = TedIwlst2013Config

	def _info(self):
	return datasets.DatasetInfo(
	description=_DESCRIPTION,
	features=datasets.Features(
	{
	"id": datasets.Value("string"),
	"translation": datasets.Translation(languages=tuple(self.config.name.split("-"))),
	},
	),
	supervised_keys=None,
	homepage=_HOMEPAGE_URL,
	citation=_CITATION,
	)

	def _split_generators(self, dl_manager):
	download_url = _LANGUAGE_PAIRS.get(tuple(self.config.name.split("-")))
	path = dl_manager.download_and_extract(download_url)
	return [
	datasets.SplitGenerator(
	name=datasets.Split.TRAIN,
	gen_kwargs={"datapath": path},
	)
	]

	def _generate_examples(self, datapath):
	l1, l2 = self.config.name.split("-")
	l1_file = _BASE_NAME.format(self.config.name, l1)
	l2_file = _BASE_NAME.format(self.config.name, l2)
	l1_path = os.path.join(datapath, l1_file)
	l2_path = os.path.join(datapath, l2_file)

	with open(l1_path, encoding="utf-8") as f1, open(l2_path, encoding="utf-8") as f2:
	for sentence_counter, (x, y) in enumerate(zip(f1, f2)):
	x = x.strip()
	y = y.strip()
	result = (
	sentence_counter,
	{
	"id": str(sentence_counter),
	"translation": {l1: x, l2: y},
	},
	)
	yield result