# Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved.
#
# 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.
import os
import collections
from paddle.io import Dataset
from paddle.utils.download import get_path_from_url
from paddle.dataset.common import md5file
from paddlenlp.utils.env import DATA_HOME
from . import DatasetBuilder
__all__ = ['PTB']
[docs]class PTB(DatasetBuilder):
URL = 'http://www.fit.vutbr.cz/~imikolov/rnnlm/simple-examples.tgz'
MD5 = "30177ea32e27c525793142b6bf2c8e2d"
META_INFO = collections.namedtuple('META_INFO', ('file', 'md5'))
SPLITS = {
'train': META_INFO(
os.path.join('simple-examples', 'data', 'ptb.train.txt'),
"f26c4b92c5fdc7b3f8c7cdcb991d8420"),
'valid': META_INFO(
os.path.join('simple-examples', 'data', 'ptb.valid.txt'),
"aa0affc06ff7c36e977d7cd49e3839bf"),
'test': META_INFO(
os.path.join('simple-examples', 'data', 'ptb.test.txt'),
"8b80168b89c18661a38ef683c0dc3721")
}
def _get_data(self, mode, **kwargs):
default_root = os.path.join(DATA_HOME, self.__class__.__name__)
filename, data_hash = self.SPLITS[mode]
fullname = os.path.join(default_root, filename)
if not os.path.exists(fullname) or (data_hash and
not md5file(fullname) == data_hash):
get_path_from_url(self.URL, default_root, self.MD5)
return fullname
def _read(self, filename, *args):
with open(filename, 'r', encoding='utf-8') as f:
for line in f:
line_stripped = line.strip()
yield {"sentence": line_stripped}