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Source code for torchtext.datasets.dbpedia

import os
from functools import partial
from typing import Union, Tuple

from torchtext._internal.module_utils import is_module_available
from torchtext.data.datasets_utils import (
    _wrap_split_argument,
    _create_dataset_directory,
)

if is_module_available("torchdata"):
    from torchdata.datapipes.iter import FileOpener, IterableWrapper
    from torchtext._download_hooks import GDriveReader

URL = "https://drive.google.com/uc?export=download&id=0Bz8a_Dbh9QhbQ2Vic1kxMmZZQ1k"

MD5 = "dca7b1ae12b1091090db52aa7ec5ca64"

NUM_LINES = {
    "train": 560000,
    "test": 70000,
}

_PATH = "dbpedia_csv.tar.gz"

_EXTRACTED_FILES = {
    "train": os.path.join("dbpedia_csv", "train.csv"),
    "test": os.path.join("dbpedia_csv", "test.csv"),
}

DATASET_NAME = "DBpedia"


def _filepath_fn(root, _=None):
    return os.path.join(root, _PATH)


def _extracted_filepath_fn(root, split, _=None):
    return os.path.join(root, _EXTRACTED_FILES[split])


def _filter_fn(split, x):
    return _EXTRACTED_FILES[split] in x[0]


def _modify_res(t):
    return int(t[0]), " ".join(t[1:])


[docs]@_create_dataset_directory(dataset_name=DATASET_NAME) @_wrap_split_argument(("train", "test")) def DBpedia(root: str, split: Union[Tuple[str], str]): """DBpedia Dataset .. warning:: using datapipes is still currently subject to a few caveats. if you wish to use this dataset with shuffling, multi-processing, or distributed learning, please see :ref:`this note <datapipes_warnings>` for further instructions. For additional details refer to https://www.dbpedia.org/resources/latest-core/ Number of lines per split: - train: 560000 - test: 70000 Args: root: Directory where the datasets are saved. Default: os.path.expanduser('~/.torchtext/cache') split: split or splits to be returned. Can be a string or tuple of strings. Default: (`train`, `test`) :returns: DataPipe that yields tuple of label (1 to 14) and text containing the news title and contents :rtype: (int, str) """ # TODO Remove this after removing conditional dependency if not is_module_available("torchdata"): raise ModuleNotFoundError( "Package `torchdata` not found. Please install following instructions at https://github.com/pytorch/data" ) url_dp = IterableWrapper([URL]) cache_compressed_dp = url_dp.on_disk_cache( filepath_fn=partial(_filepath_fn, root), hash_dict={_filepath_fn(root): MD5}, hash_type="md5", ) cache_compressed_dp = GDriveReader(cache_compressed_dp).end_caching(mode="wb", same_filepath_fn=True) cache_decompressed_dp = cache_compressed_dp.on_disk_cache(filepath_fn=partial(_extracted_filepath_fn, root, split)) cache_decompressed_dp = ( FileOpener(cache_decompressed_dp, mode="b").load_from_tar().filter(partial(_filter_fn, split)) ) cache_decompressed_dp = cache_decompressed_dp.end_caching(mode="wb", same_filepath_fn=True) data_dp = FileOpener(cache_decompressed_dp, encoding="utf-8") return data_dp.parse_csv().map(fn=_modify_res).shuffle().set_shuffle(False).sharding_filter()

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