Update files from the datasets library (from 1.5.0)

Release notes: https://github.com/huggingface/datasets/releases/tag/1.5.0

.gitattributes

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+*.arrow filter=lfs diff=lfs merge=lfs -text
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README.md

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+---
+annotations_creators:
+- found
+language_creators:
+- found
+languages:
+- bg
+- cs
+- da
+- de
+- el
+- en
+- es
+- et
+- fi
+- fr
+- hu
+- it
+- lt
+- lv
+- nl
+- pl
+- pt
+- ro
+- sk
+- sl
+- sv
+licenses:
+- unknown
+multilinguality:
+- translation
+size_categories:
+- 100K<n<1M
+source_datasets:
+- original
+task_categories:
+- other
+task_ids:
+- machine-translation
+---
+
+# Dataset Card for europarl-bilingual
+
+## Table of Contents
+- [Dataset Description](#dataset-description)
+  - [Dataset Summary](#dataset-summary)
+  - [Supported Tasks](#supported-tasks-and-leaderboards)
+  - [Languages](#languages)
+- [Dataset Structure](#dataset-structure)
+  - [Data Instances](#data-instances)
+  - [Data Fields](#data-instances)
+  - [Data Splits](#data-instances)
+- [Dataset Creation](#dataset-creation)
+  - [Curation Rationale](#curation-rationale)
+  - [Source Data](#source-data)
+  - [Annotations](#annotations)
+  - [Personal and Sensitive Information](#personal-and-sensitive-information)
+- [Considerations for Using the Data](#considerations-for-using-the-data)
+  - [Social Impact of Dataset](#social-impact-of-dataset)
+  - [Discussion of Biases](#discussion-of-biases)
+  - [Other Known Limitations](#other-known-limitations)
+- [Additional Information](#additional-information)
+  - [Dataset Curators](#dataset-curators)
+  - [Licensing Information](#licensing-information)
+  - [Citation Information](#citation-information)
+  - [Contributions](#contributions)
+
+## Dataset Description
+
+- **Homepage:** [Statmt](http://www.statmt.org/europarl/)
+- **Repository:** [OPUS Europarl](https://opus.nlpl.eu/Europarl.php)
+- **Paper:** [Aclweb](https://www.aclweb.org/anthology/L12-1246/)
+- **Leaderboard:** [Needs More Information]
+- **Point of Contact:** [Needs More Information]
+
+### Dataset Summary
+
+A parallel corpus extracted from the European Parliament web site by Philipp Koehn (University of Edinburgh). The main intended use is to aid statistical machine translation research.
+
+To load a language pair which isn't part of the config, all you need to do is specify the language code as pairs.
+You can find the valid pairs in Homepage section of Dataset Description: https://opus.nlpl.eu/Europarl.php
+E.g.
+
+`dataset = load_dataset("europarl_bilingual", lang1="fi", lang2="fr")`
+
+
+### Supported Tasks and Leaderboards
+
+Tasks: Machine Translation, Cross Lingual Word Embeddings (CWLE) Alignment
+
+### Languages
+
+- 21 languages, 211 bitexts
+- total number of files: 207,775
+- total number of tokens: 759.05M
+- total number of sentence fragments: 30.32M
+
+Every pair of the following languages is available:
+- bg
+- cs
+- da
+- de
+- el
+- en
+- es
+- et
+- fi
+- fr
+- hu
+- it
+- lt
+- lv
+- nl
+- pl
+- pt
+- ro
+- sk
+- sl
+- sv
+
+
+## Dataset Structure
+
+### Data Instances
+
+Here is an example from the en-fr pair:
+```
+{
+  'translation': {
+    'en': 'Resumption of the session',
+    'fr': 'Reprise de la session'
+  }
+}
+```
+
+### Data Fields
+
+- `translation`: a dictionary containing two strings paired with a key indicating the corresponding language.
+
+### Data Splits
+
+- `train`: only train split is provided. Authors did not provide a separation of examples in `train`, `dev` and `test`.
+
+## Dataset Creation
+
+### Curation Rationale
+
+[Needs More Information]
+
+### Source Data
+
+#### Initial Data Collection and Normalization
+
+[Needs More Information]
+
+#### Who are the source language producers?
+
+[Needs More Information]
+
+### Annotations
+
+#### Annotation process
+
+[Needs More Information]
+
+#### Who are the annotators?
+
+[Needs More Information]
+
+### Personal and Sensitive Information
+
+[Needs More Information]
+
+## Considerations for Using the Data
+
+### Social Impact of Dataset
+
+[Needs More Information]
+
+### Discussion of Biases
+
+[Needs More Information]
+
+### Other Known Limitations
+
+[Needs More Information]
+
+## Additional Information
+
+### Dataset Curators
+
+[Needs More Information]
+
+### Licensing Information
+
+The data set comes with the same license
+as the original sources.
+Please, check the information about the source
+that is given on
+http://opus.nlpl.eu/Europarl-v8.php
+
+### Citation Information
+
+```
+@InProceedings{TIEDEMANN12.463,
+  author = {J�rg Tiedemann},
+  title = {Parallel Data, Tools and Interfaces in OPUS},
+  booktitle = {Proceedings of the Eight International Conference on Language Resources and Evaluation (LREC'12)},
+  year = {2012},
+  month = {may},
+  date = {23-25},
+  address = {Istanbul, Turkey},
+  editor = {Nicoletta Calzolari (Conference Chair) and Khalid Choukri and Thierry Declerck and Mehmet Ugur Dogan and Bente Maegaard and Joseph Mariani and Jan Odijk and Stelios Piperidis},
+  publisher = {European Language Resources Association (ELRA)},
+  isbn = {978-2-9517408-7-7},
+  language = {english}
+ }
+ ```
+
+### Contributions
+
+Thanks to [@lucadiliello](https://github.com/lucadiliello) for adding this dataset.

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europarl_bilingual.py

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+# coding=utf-8
+# Copyright 2020 The HuggingFace Datasets Authors and the current dataset script contributor.
+#
+# 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.
+
+from __future__ import absolute_import, division, print_function
+
+import os
+import xml.etree.ElementTree as ET
+
+import datasets
+
+
+# Find for instance the citation on arxiv or on the dataset repo/website
+_CITATION = "http://www.lrec-conf.org/proceedings/lrec2012/pdf/463_Paper.pdf"
+
+# You can copy an official description
+_DESCRIPTION = """\
+A parallel corpus extracted from the European Parliament web site by Philipp Koehn (University of Edinburgh). The main intended use is to aid statistical machine translation research.
+"""
+
+# Add a link to an official homepage for the dataset here
+_HOMEPAGE = "https://opus.nlpl.eu/Europarl.php"
+
+#  Add the licence for the dataset here if you can find it
+_LICENSE = """\
+The data set comes with the same license
+as the original sources.
+Please, check the information about the source
+that is given on
+http://opus.nlpl.eu/Europarl-v8.php
+"""
+
+# The HuggingFace dataset library don't host the datasets but only point to the original files
+# This can be an arbitrary nested dict/list of URLs (see below in `_split_generators` method)
+LANGUAGES = [
+    "bg",
+    "cs",
+    "da",
+    "de",
+    "el",
+    "en",
+    "es",
+    "et",
+    "fi",
+    "fr",
+    "hu",
+    "it",
+    "lt",
+    "lv",
+    "nl",
+    "pl",
+    "pt",
+    "ro",
+    "sk",
+    "sl",
+    "sv",
+]
+
+ALL_PAIRS = []
+for i in range(len(LANGUAGES)):
+    for j in range(i + 1, len(LANGUAGES)):
+        ALL_PAIRS.append((LANGUAGES[i], LANGUAGES[j]))
+
+_VERSION = "8.0.0"
+_BASE_URL_DATASET = "https://opus.nlpl.eu/download.php?f=Europarl/v8/raw/{}.zip"
+_BASE_URL_RELATIONS = "https://opus.nlpl.eu/download.php?f=Europarl/v8/xml/{}-{}.xml.gz"
+
+
+class EuroparlBilingualConfig(datasets.BuilderConfig):
+    """ Slightly custom config to require source and target languages. """
+
+    def __init__(self, *args, lang1=None, lang2=None, **kwargs):
+        super().__init__(
+            *args,
+            name=f"{lang1}-{lang2}",
+            **kwargs,
+        )
+        self.lang1 = lang1
+        self.lang2 = lang2
+
+    def _lang_pair(self):
+        return (self.lang1, self.lang2)
+
+    def _is_valid(self):
+        return self._lang_pair() in ALL_PAIRS
+
+
+class EuroparlBilingual(datasets.GeneratorBasedBuilder):
+    """ Europarl contains aligned sentences in multiple west language pairs."""
+
+    VERSION = datasets.Version(_VERSION)
+
+    BUILDER_CONFIG_CLASS = EuroparlBilingualConfig
+    BUILDER_CONFIGS = [
+        EuroparlBilingualConfig(lang1=lang1, lang2=lang2, version=datasets.Version(_VERSION))
+        for lang1, lang2 in ALL_PAIRS[:5]
+    ]
+
+    def _info(self):
+        """ This method specifies the datasets.DatasetInfo object which contains informations and typings for the dataset. """
+        features = datasets.Features(
+            {
+                "translation": datasets.Translation(languages=(self.config.lang1, self.config.lang2)),
+            }
+        )
+
+        return datasets.DatasetInfo(
+            description=_DESCRIPTION,
+            features=features,
+            supervised_keys=None,
+            homepage=_HOMEPAGE,
+            license=_LICENSE,
+            citation=_CITATION,
+        )
+
+    def _split_generators(self, dl_manager):
+        """Returns SplitGenerators."""
+
+        if not self.config._is_valid():
+            raise ValueError(f"{self.config._lang_pair()} is not a supported language pair. Choose among: {ALL_PAIRS}")
+
+        # download data files
+        path_datafile_1 = dl_manager.download_and_extract(_BASE_URL_DATASET.format(self.config.lang1))
+        path_datafile_2 = dl_manager.download_and_extract(_BASE_URL_DATASET.format(self.config.lang2))
+
+        # download relations file
+        path_relation_file = dl_manager.download_and_extract(
+            _BASE_URL_RELATIONS.format(self.config.lang1, self.config.lang2)
+        )
+
+        return [
+            datasets.SplitGenerator(
+                name=datasets.Split.TRAIN,
+                # These kwargs will be passed to _generate_examples
+                gen_kwargs={
+                    "path_datafiles": (path_datafile_1, path_datafile_2),
+                    "path_relation_file": path_relation_file,
+                },
+            )
+        ]
+
+    @staticmethod
+    def _parse_xml_datafile(filepath):
+        """
+        Parse and return a Dict[sentence_id, text] representing data with the following structure:
+        """
+        document = ET.parse(filepath).getroot()
+        return {tag.attrib["id"]: tag.text for tag in document.iter("s")}
+
+    def _generate_examples(self, path_datafiles, path_relation_file):
+        """Yields examples.
+        In parenthesis the useful attributes
+
+        Lang files XML
+        - document
+            - CHAPTER ('ID')
+                - P ('id')
+                    - s ('id')
+
+        Relation file XML
+        - cesAlign
+            - linkGrp ('fromDoc', 'toDoc')
+                - link ('xtargets': '1;1')
+        """
+
+        # my counter
+        _id = 0
+        relations_root = ET.parse(path_relation_file).getroot()
+
+        for linkGroup in relations_root:
+            # retrieve files and remove .gz extension because 'datasets' library already decompress them
+            from_doc_dict = EuroparlBilingual._parse_xml_datafile(
+                os.path.splitext(os.path.join(path_datafiles[0], "Europarl", "raw", linkGroup.attrib["fromDoc"]))[0]
+            )
+
+            to_doc_dict = EuroparlBilingual._parse_xml_datafile(
+                os.path.splitext(os.path.join(path_datafiles[1], "Europarl", "raw", linkGroup.attrib["toDoc"]))[0]
+            )
+
+            for link in linkGroup:
+                from_sentence_ids, to_sentence_ids = link.attrib["xtargets"].split(";")
+                from_sentence_ids = [i for i in from_sentence_ids.split(" ") if i]
+                to_sentence_ids = [i for i in to_sentence_ids.split(" ") if i]
+
+                if not len(from_sentence_ids) or not len(to_sentence_ids):
+                    continue
+
+                # in rare cases, there is not entry for some key pairs
+                sentence_lang1 = " ".join(from_doc_dict[i] for i in from_sentence_ids if i in from_doc_dict)
+                sentence_lang2 = " ".join(to_doc_dict[i] for i in to_sentence_ids if i in to_doc_dict)
+
+                yield _id, {"translation": {self.config.lang1: sentence_lang1, self.config.lang2: sentence_lang2}}
+                _id += 1