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# 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.
"""CoQA dataset.
This `CoQA` adds the "additional_answers" feature that's missing in the original
datasets version:
https://github.com/huggingface/datasets/blob/master/datasets/coqa/coqa.py
"""
import json
import datasets
_CITATION = """\
@misc{reddy2018coqa,
title={CoQA: A Conversational Question Answering Challenge},
author={Siva Reddy and Danqi Chen and Christopher D. Manning},
year={2018},
eprint={1808.07042},
archivePrefix={arXiv},
primaryClass={cs.CL}
}
"""
_DESCRIPTION = """\
CoQA is a large-scale dataset for building Conversational Question Answering
systems. The goal of the CoQA challenge is to measure the ability of machines to
understand a text passage and answer a series of interconnected questions that
appear in a conversation.
"""
_HOMEPAGE = "https://stanfordnlp.github.io/coqa/"
_LICENSE = "Different licenses depending on the content (see https://stanfordnlp.github.io/coqa/ for details)"
_URLS = {
"train": "https://nlp.stanford.edu/data/coqa/coqa-train-v1.0.json",
"validation": "https://nlp.stanford.edu/data/coqa/coqa-dev-v1.0.json",
}
# `additional_answers` are not available in the train set so we fill them with
# empty dicts of the same form.
_EMPTY_ADDITIONAL_ANSWER = {
"0": [
{
"span_start": -1,
"span_end": -1,
"span_text": "",
"input_text": "",
"turn_id": -1,
}
],
"1": [
{
"span_start": -1,
"span_end": -1,
"span_text": "",
"input_text": "",
"turn_id": -1,
}
],
"2": [
{
"span_start": -1,
"span_end": -1,
"span_text": "",
"input_text": "",
"turn_id": -1,
}
],
}
class Coqa(datasets.GeneratorBasedBuilder):
"""CoQA is a large-scale dataset for building Conversational Question Answering systems."""
VERSION = datasets.Version("0.0.1")
BUILDER_CONFIGS = [
datasets.BuilderConfig(
name="coqa", version=VERSION, description="The CoQA dataset."
),
]
def _info(self):
features = datasets.Features(
{
"id": datasets.Value("string"),
"source": datasets.Value("string"),
"story": datasets.Value("string"),
"questions": datasets.features.Sequence(
{
"input_text": datasets.Value("string"),
"turn_id": datasets.Value("int32"),
}
),
"answers": datasets.features.Sequence(
{
"span_start": datasets.Value("int32"),
"span_end": datasets.Value("int32"),
"span_text": datasets.Value("string"),
"input_text": datasets.Value("string"),
"turn_id": datasets.Value("int32"),
}
),
"additional_answers": {
"0": datasets.features.Sequence(
{
"span_start": datasets.Value("int32"),
"span_end": datasets.Value("int32"),
"span_text": datasets.Value("string"),
"input_text": datasets.Value("string"),
"turn_id": datasets.Value("int32"),
}
),
"1": datasets.features.Sequence(
{
"span_start": datasets.Value("int32"),
"span_end": datasets.Value("int32"),
"span_text": datasets.Value("string"),
"input_text": datasets.Value("string"),
"turn_id": datasets.Value("int32"),
}
),
"2": datasets.features.Sequence(
{
"span_start": datasets.Value("int32"),
"span_end": datasets.Value("int32"),
"span_text": datasets.Value("string"),
"input_text": datasets.Value("string"),
"turn_id": datasets.Value("int32"),
}
),
},
}
)
return datasets.DatasetInfo(
description=_DESCRIPTION,
features=features,
homepage=_HOMEPAGE,
license=_LICENSE,
citation=_CITATION,
)
def _split_generators(self, dl_manager):
urls = {"train": _URLS["train"], "validation": _URLS["validation"]}
data_dirs = dl_manager.download_and_extract(urls)
return [
datasets.SplitGenerator(
name=datasets.Split.TRAIN,
# These kwargs will be passed to _generate_examples
gen_kwargs={
"filepath": data_dirs["train"],
"split": datasets.Split.TRAIN,
},
),
datasets.SplitGenerator(
name=datasets.Split.VALIDATION,
# These kwargs will be passed to _generate_examples
gen_kwargs={
"filepath": data_dirs["validation"],
"split": datasets.Split.VALIDATION,
},
),
]
# method parameters are unpacked from `gen_kwargs` as given in `_split_generators`
def _generate_examples(self, filepath, split):
with open(filepath, encoding="utf-8") as f:
data = json.load(f)
for row in data["data"]:
id = row["id"]
source = row["source"]
story = row["story"]
questions = [
{"input_text": q["input_text"], "turn_id": q["turn_id"]}
for q in row["questions"]
]
answers = [
{
"span_start": a["span_start"],
"span_end": a["span_end"],
"span_text": a["span_text"],
"input_text": a["input_text"],
"turn_id": a["turn_id"],
}
for a in row["answers"]
]
if split == datasets.Split.TRAIN:
additional_answers = _EMPTY_ADDITIONAL_ANSWER
else:
additional_answers = {
"0": [
{
"span_start": a0["span_start"],
"span_end": a0["span_end"],
"span_text": a0["span_text"],
"input_text": a0["input_text"],
"turn_id": a0["turn_id"],
}
for a0 in row["additional_answers"]["0"]
],
"1": [
{
"span_start": a1["span_start"],
"span_end": a1["span_end"],
"span_text": a1["span_text"],
"input_text": a1["input_text"],
"turn_id": a1["turn_id"],
}
for a1 in row["additional_answers"]["1"]
],
"2": [
{
"span_start": a2["span_start"],
"span_end": a2["span_end"],
"span_text": a2["span_text"],
"input_text": a2["input_text"],
"turn_id": a2["turn_id"],
}
for a2 in row["additional_answers"]["2"]
],
}
yield row["id"], {
"id": id,
"story": story,
"source": source,
"questions": questions,
"answers": answers,
"additional_answers": additional_answers,
}