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# coding=utf-8
# Copyright 2020 The TensorFlow Datasets Authors and the 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
"""Tiny Shakespeare dataset."""
import os
import datasets
_CITATION = """\
@misc{
author={Karpathy, Andrej},
title={char-rnn},
year={2015},
howpublished={\\url{https://github.com/karpathy/char-rnn}}
}"""
_DESCRIPTION = """\
40,000 lines of Shakespeare from a variety of Shakespeare's plays. \
Featured in Andrej Karpathy's blog post 'The Unreasonable Effectiveness of \
Recurrent Neural Networks': \
http://karpathy.github.io/2015/05/21/rnn-effectiveness/.
To use for e.g. character modelling:
```
d = datasets.load_dataset(name='tiny_shakespeare')['train']
d = d.map(lambda x: datasets.Value('strings').unicode_split(x['text'], 'UTF-8'))
# train split includes vocabulary for other splits
vocabulary = sorted(set(next(iter(d)).numpy()))
d = d.map(lambda x: {'cur_char': x[:-1], 'next_char': x[1:]})
d = d.unbatch()
seq_len = 100
batch_size = 2
d = d.batch(seq_len)
d = d.batch(batch_size)
```
"""
class TinyShakespeare(datasets.GeneratorBasedBuilder):
"""Tiny Shakespeare dataset builder."""
VERSION = datasets.Version("1.0.0")
def _info(self):
return datasets.DatasetInfo(
description=_DESCRIPTION,
features=datasets.Features({"text": datasets.Value("string")}),
supervised_keys=None,
homepage="https://github.com/karpathy/char-rnn/blob/master/data/tinyshakespeare/input.txt",
citation=_CITATION,
)
def _split_generators(self, dl_manager):
"""Returns SplitGenerators."""
download_path = dl_manager.download_and_extract(
"https://raw.githubusercontent.com/karpathy/char-rnn/master/data/tinyshakespeare/input.txt"
)
if os.path.isdir(download_path):
# During testing the download manager mock gives us a directory
txt_path = os.path.join(download_path, "input.txt")
else:
txt_path = download_path
with open(txt_path, "r", encoding="utf-8") as f:
text = f.read()
# 90/5/5 split
i = int(len(text) * 0.9)
train_text, text = text[:i], text[i:]
i = int(len(text) * 0.5)
validation_text, text = text[:i], text[i:]
test_text = text
return [
datasets.SplitGenerator(
name=datasets.Split.TRAIN,
# These kwargs will be passed to _generate_examples
gen_kwargs={"split_key": "train", "split_text": train_text},
),
datasets.SplitGenerator(
name=datasets.Split.VALIDATION,
gen_kwargs={"split_key": "validation", "split_text": validation_text},
),
datasets.SplitGenerator(
name=datasets.Split.TEST,
gen_kwargs={"split_key": "test", "split_text": test_text},
),
]
def _generate_examples(self, split_key, split_text):
"""Yields examples."""
data_key = split_key # Should uniquely identify the thing yielded
feature_dict = {"text": split_text}
yield data_key, feature_dict
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