Source code for paddlenlp.datasets.poetry

# 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 collections
import os
import warnings

from paddle.io import Dataset
from paddle.dataset.common import md5file
from paddle.utils.download import get_path_from_url
from paddlenlp.utils.env import DATA_HOME
from . import DatasetBuilder

__all__ = ['Poetry']


class Poetry(DatasetBuilder):
    URL = "https://paddlenlp.bj.bcebos.com/datasets/poetry.tar.gz"
    MD5 = '8edd7eda1b273145b70ef29c82cd622b'
    META_INFO = collections.namedtuple('META_INFO', ('file', 'md5'))
    SPLITS = {
        'train': META_INFO(
            os.path.join('poetry', 'train.tsv'),
            '176c6202b5e71656ae7e7848eec4c54f'),
        'dev': META_INFO(
            os.path.join('poetry', 'dev.tsv'),
            '737e4b6da5facdc0ac33fe688df19931'),
        'test': META_INFO(
            os.path.join('poetry', 'test.tsv'),
            '1dca907b2d712730c7c828f8acee7431'),
    }

    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().split('\t')
                if not line_stripped:
                    break
                if len(line_stripped) == 2:
                    tokens = line_stripped[0]
                    labels = line_stripped[1]
                else:
                    tokens = line_stripped
                    labels = []
                yield {"tokens": tokens, "labels": labels}