Exemplo n.º 1
0
def _setup_datasets(dataset_name,
                    train_filenames,
                    valid_filenames,
                    test_filenames,
                    root='.data'):
    if not isinstance(train_filenames, tuple) and not isinstance(valid_filenames, tuple) \
            and not isinstance(test_filenames, tuple):
        raise ValueError("All filenames must be tuples")

    src_train, tgt_train = train_filenames
    src_eval, tgt_eval = valid_filenames
    src_test, tgt_test = test_filenames

    extracted_files = []
    if isinstance(URLS[dataset_name], list):
        for f in URLS[dataset_name]:
            dataset_tar = download_from_url(f, root=root)
            extracted_files.extend(extract_archive(dataset_tar))
    elif isinstance(URLS[dataset_name], str):
        dataset_tar = download_from_url(URLS[dataset_name], root=root)
        extracted_files.extend(extract_archive(dataset_tar))
    else:
        raise ValueError(
            "URLS for {} has to be in a form or list or string".format(
                dataset_name))

    # Clean the xml and tag file in the archives
    file_archives = []
    for fname in extracted_files:
        if 'xml' in fname:
            _clean_xml_file(fname)
            file_archives.append(os.path.splitext(fname)[0])
        elif "tags" in fname:
            _clean_tags_file(fname)
            file_archives.append(fname.replace('.tags', ''))
        else:
            file_archives.append(fname)

    data_filenames = defaultdict(dict)
    data_filenames = {
        "train": _construct_filepaths(file_archives, src_train, tgt_train),
        "valid": _construct_filepaths(file_archives, src_eval, tgt_eval),
        "test": _construct_filepaths(file_archives, src_test, tgt_test)
    }

    for key in data_filenames.keys():
        if len(data_filenames[key]) == 0 or data_filenames[key] is None:
            raise FileNotFoundError(
                "Files are not found for data type {}".format(key))

    datasets = []
    for key in data_filenames.keys():
        src_data_iter = _read_text_iterator(data_filenames[key][0])
        tgt_data_iter = _read_text_iterator(data_filenames[key][1])

        def _iter(src_data_iter, tgt_data_iter):
            for item in zip(src_data_iter, tgt_data_iter):
                yield item

        datasets.append(
            RawTextIterableDataset(dataset_name, NUM_LINES[dataset_name],
                                   _iter(src_data_iter, tgt_data_iter)))

    return tuple(datasets)
Exemplo n.º 2
0
def WMT14(root,
          split,
          language_pair=('de', 'en'),
          train_set='train.tok.clean.bpe.32000',
          valid_set='newstest2013.tok.bpe.32000',
          test_set='newstest2014.tok.bpe.32000'):
    """WMT14 Dataset

    The available datasets include following:

    **Language pairs**:

    +-----+-----+-----+
    |     |'en' |'de' |
    +-----+-----+-----+
    |'en' |     |   x |
    +-----+-----+-----+
    |'de' |  x  |     |
    +-----+-----+-----+


    Args:
        root: Directory where the datasets are saved. Default: ".data"
        split: split or splits to be returned. Can be a string or tuple of strings. Default: (‘train’, ‘valid’, ‘test’)
        language_pair: tuple or list containing src and tgt language
        train_set: A string to identify train set.
        valid_set: A string to identify validation set.
        test_set: A string to identify test set.

    Examples:
        >>> from torchtext.datasets import WMT14
        >>> train_iter, valid_iter, test_iter = WMT14()
        >>> src_sentence, tgt_sentence = next(train_iter)
    """

    supported_language = ['en', 'de']
    supported_train_set = [s for s in NUM_LINES if 'train' in s]
    supported_valid_set = [s for s in NUM_LINES if 'test' in s]
    supported_test_set = [s for s in NUM_LINES if 'test' in s]

    assert (
        len(language_pair) == 2
    ), 'language_pair must contain only 2 elements: src and tgt language respectively'

    if language_pair[0] not in supported_language:
        raise ValueError(
            "Source language '{}' is not supported. Valid options are {}".
            format(language_pair[0], supported_language))

    if language_pair[1] not in supported_language:
        raise ValueError(
            "Target language '{}' is not supported. Valid options are {}".
            format(language_pair[1], supported_language))

    if train_set not in supported_train_set:
        raise ValueError(
            "'{}' is not a valid train set identifier. valid options are {}".
            format(train_set, supported_train_set))

    if valid_set not in supported_valid_set:
        raise ValueError(
            "'{}' is not a valid valid set identifier. valid options are {}".
            format(valid_set, supported_valid_set))

    if test_set not in supported_test_set:
        raise ValueError(
            "'{}' is not a valid valid set identifier. valid options are {}".
            format(test_set, supported_test_set))

    train_filenames = '{}.{}'.format(train_set,
                                     language_pair[0]), '{}.{}'.format(
                                         train_set, language_pair[1])
    valid_filenames = '{}.{}'.format(valid_set,
                                     language_pair[0]), '{}.{}'.format(
                                         valid_set, language_pair[1])
    test_filenames = '{}.{}'.format(test_set,
                                    language_pair[0]), '{}.{}'.format(
                                        test_set, language_pair[1])

    if split == 'train':
        src_file, tgt_file = train_filenames
    elif split == 'valid':
        src_file, tgt_file = valid_filenames
    else:
        src_file, tgt_file = test_filenames

    dataset_tar = download_from_url(URL,
                                    root=root,
                                    hash_value=MD5,
                                    path=os.path.join(root, _PATH),
                                    hash_type='md5')
    extracted_files = extract_archive(dataset_tar)

    data_filenames = {
        split: _construct_filepaths(extracted_files, src_file, tgt_file),
    }

    for key in data_filenames:
        if len(data_filenames[key]) == 0 or data_filenames[key] is None:
            raise FileNotFoundError(
                "Files are not found for data type {}".format(key))

    assert data_filenames[split][
        0] is not None, "Internal Error: File not found for reading"
    assert data_filenames[split][
        1] is not None, "Internal Error: File not found for reading"
    src_data_iter = _read_text_iterator(data_filenames[split][0])
    tgt_data_iter = _read_text_iterator(data_filenames[split][1])

    def _iter(src_data_iter, tgt_data_iter):
        for item in zip(src_data_iter, tgt_data_iter):
            yield item

    return _RawTextIterableDataset(DATASET_NAME,
                                   NUM_LINES[os.path.splitext(src_file)[0]],
                                   _iter(src_data_iter, tgt_data_iter))
Exemplo n.º 3
0
def Multi30k(root,
             split,
             task='task1',
             language_pair=('de', 'en'),
             train_set="train",
             valid_set="val",
             test_set="test_2016_flickr"):
    """Multi30k Dataset

    The available datasets include following:

    **Language pairs (task1)**:

    +-----+-----+-----+-----+-----+
    |     |'en' |'cs' |'de' |'fr' |
    +-----+-----+-----+-----+-----+
    |'en' |     |   x |  x  |  x  |
    +-----+-----+-----+-----+-----+
    |'cs' |  x  |     |  x  |  x  |
    +-----+-----+-----+-----+-----+
    |'de' |  x  |   x |     |  x  |
    +-----+-----+-----+-----+-----+
    |'fr' |  x  |   x |  x  |     |
    +-----+-----+-----+-----+-----+

    **Language pairs (task2)**:

    +-----+-----+-----+
    |     |'en' |'de' |
    +-----+-----+-----+
    |'en' |     |   x |
    +-----+-----+-----+
    |'de' |  x  |     |
    +-----+-----+-----+

    For additional details refer to source: https://github.com/multi30k/dataset

    Args:
        root: Directory where the datasets are saved. Default: ".data"
        split: split or splits to be returned. Can be a string or tuple of strings. Default: (‘train’, ‘valid’, ‘test’)
        task: Indicate the task
        language_pair: tuple or list containing src and tgt language
        train_set: A string to identify train set.
        valid_set: A string to identify validation set.
        test_set: A string to identify test set.

    Examples:
        >>> from torchtext.experimental.datasets.raw import Multi30k
        >>> train_iter, valid_iter, test_iter = Multi30k()
        >>> src_sentence, tgt_sentence = next(train_iter)
    """

    if task not in SUPPORTED_DATASETS.keys():
        raise ValueError(
            'task {} is not supported. Valid options are {}'.format(
                task, SUPPORTED_DATASETS.keys()))

    assert (
        len(language_pair) == 2
    ), 'language_pair must contain only 2 elements: src and tgt language respectively'

    if language_pair[0] not in SUPPORTED_DATASETS[task].keys():
        raise ValueError(
            "Source language '{}' is not supported. Valid options for task '{}' are {}"
            .format(language_pair[0], task,
                    list(SUPPORTED_DATASETS[task].keys())))

    if language_pair[1] not in SUPPORTED_DATASETS[task].keys():
        raise ValueError(
            "Target language '{}' is not supported. Valid options for task '{}' are {}"
            .format(language_pair[1], task,
                    list(SUPPORTED_DATASETS[task].keys())))

    if train_set not in SUPPORTED_DATASETS[task][
            language_pair[0]].keys() or 'train' not in train_set:
        raise ValueError(
            "'{}' is not a valid train set identifier. valid options for task '{}' and language pair {} are {}"
            .format(train_set, task, language_pair, [
                k for k in SUPPORTED_DATASETS[task][language_pair[0]].keys()
                if 'train' in k
            ]))

    if valid_set not in SUPPORTED_DATASETS[task][
            language_pair[0]].keys() or 'val' not in valid_set:
        raise ValueError(
            "'{}' is not a valid valid set identifier. valid options for task '{}' and language pair {} are {}"
            .format(valid_set, task, language_pair, [
                k for k in SUPPORTED_DATASETS[task][language_pair[0]].keys()
                if 'val' in k
            ]))

    if test_set not in SUPPORTED_DATASETS[task][
            language_pair[0]].keys() or 'test' not in test_set:
        raise ValueError(
            "'{}' is not a valid test set identifier. valid options for task '{}' and language pair {} are {}"
            .format(test_set, task, language_pair, [
                k for k in SUPPORTED_DATASETS[task][language_pair[0]].keys()
                if 'test' in k
            ]))

    train_filenames = [
        "{}.{}".format(train_set, language_pair[0]),
        "{}.{}".format(train_set, language_pair[1])
    ]
    valid_filenames = [
        "{}.{}".format(valid_set, language_pair[0]),
        "{}.{}".format(valid_set, language_pair[1])
    ]
    test_filenames = [
        "{}.{}".format(test_set, language_pair[0]),
        "{}.{}".format(test_set, language_pair[1])
    ]

    if split == 'train':
        src_file, tgt_file = train_filenames
    elif split == 'valid':
        src_file, tgt_file = valid_filenames
    else:
        src_file, tgt_file = test_filenames

    extracted_files = []  # list of paths to the extracted files

    current_url = []
    current_md5 = []

    current_filenames = [src_file, tgt_file]
    for url, md5 in zip(URL[split], MD5[split]):
        if any(f in url for f in current_filenames):
            current_url.append(url)
            current_md5.append(md5)

    for url, md5 in zip(current_url, current_md5):
        dataset_tar = download_from_url(url,
                                        path=os.path.join(
                                            root, os.path.basename(url)),
                                        root=root,
                                        hash_value=md5,
                                        hash_type='md5')
        extracted_files.extend(extract_archive(dataset_tar))

    file_archives = extracted_files

    data_filenames = {
        split: _construct_filepaths(file_archives, src_file, tgt_file),
    }

    for key in data_filenames:
        if len(data_filenames[key]) == 0 or data_filenames[key] is None:
            raise FileNotFoundError(
                "Files are not found for data type {}".format(key))

    assert data_filenames[split][
        0] is not None, "Internal Error: File not found for reading"
    assert data_filenames[split][
        1] is not None, "Internal Error: File not found for reading"
    src_data_iter = _read_text_iterator(data_filenames[split][0])
    tgt_data_iter = _read_text_iterator(data_filenames[split][1])

    def _iter(src_data_iter, tgt_data_iter):
        for item in zip(src_data_iter, tgt_data_iter):
            yield item

    set_identifier = {
        'train': train_set,
        'valid': valid_set,
        'test': test_set,
    }

    return RawTextIterableDataset(
        "Multi30k", SUPPORTED_DATASETS[task][language_pair[0]][
            set_identifier[split]]['NUM_LINES'],
        _iter(src_data_iter, tgt_data_iter))
Exemplo n.º 4
0
import torchtext
import torch
from torchtext.data.utils import get_tokenizer
from collections import Counter
from torchtext.vocab import Vocab
from torchtext.utils import download_from_url, extract_archive
import io


url_base = 'https://raw.githubusercontent.com/multi30k/dataset/master/data/task1/raw/'
train_urls = ('train.de.gz', 'train.en.gz')
val_urls = ('val.de.gz', 'val.en.gz')
test_urls = ('test_2016_flickr.de.gz', 'test_2016_flickr.en.gz')

train_filepaths = [extract_archive(download_from_url(url_base + url))[0] for url in train_urls]
val_filepaths = [extract_archive(download_from_url(url_base + url))[0] for url in val_urls]
test_filepaths = [extract_archive(download_from_url(url_base + url))[0] for url in test_urls]

de_tokenizer = get_tokenizer('spacy', language='de')
en_tokenizer = get_tokenizer('spacy', language='en')

def build_vocab(filepath, tokenizer):
    counter = Counter()
    with io.open(filepath, encoding='utf8') as f:
        for string_ in f:
            counter.update(tokenizer(string_))
    return Vocab(counter, specials=['<unk>', '<pad>', '<bos>', '<eos>'])

de_vocab = build_vocab(train_filepaths[0], de_tokenizer)
en_vocab = build_vocab(train_filepaths[1], en_tokenizer)
Exemplo n.º 5
0
import torchtext
import torch
from torchtext.data.utils import get_tokenizer
from collections import Counter
from torchtext.vocab import Vocab
from torchtext.utils import download_from_url, extract_archive
import io

url_base = 'https://raw.githubusercontent.com/multi30k/dataset/master/data/task1/raw/'
train_urls = ('train.de.gz', 'train.en.gz')
val_urls = ('val.de.gz', 'val.en.gz')
test_urls = ('test_2016_flickr.de.gz', 'test_2016_flickr.en.gz')

train_filepaths = [
    extract_archive(download_from_url(url_base + url))[0] for url in train_urls
]
val_filepaths = [
    extract_archive(download_from_url(url_base + url))[0] for url in val_urls
]
test_filepaths = [
    extract_archive(download_from_url(url_base + url))[0] for url in test_urls
]

de_tokenizer = get_tokenizer('spacy', language='de')
en_tokenizer = get_tokenizer('spacy', language='en')


def build_vocab(filepath, tokenizer):
    counter = Counter()
    with io.open(filepath, encoding="utf8") as f:
Exemplo n.º 6
0
        self.register_buffer('pe', pe)

    def forward(self, x):
        x = x + self.pe[:x.size(0), :]
        return self.dropout(x)


#%%
import io
import torch
from torchtext.utils import download_from_url, extract_archive
from torchtext.data.utils import get_tokenizer
from torchtext.vocab import build_vocab_from_iterator

url = 'https://s3.amazonaws.com/research.metamind.io/wikitext/wikitext-2-v1.zip'
test_filepath, valid_filepath, train_filepath = extract_archive(
    download_from_url(url))
tokenizer = get_tokenizer('basic_english')
vocab = build_vocab_from_iterator(
    map(tokenizer, iter(io.open(train_filepath, encoding="utf8"))))


def data_process(raw_text_iter):
    data = [
        torch.tensor([vocab[token] for token in tokenizer(item)],
                     dtype=torch.long) for item in raw_text_iter
    ]
    return torch.cat(tuple(filter(lambda t: t.numel() > 0, data)))


train_data = data_process(iter(io.open(train_filepath, encoding="utf8")))
val_data = data_process(iter(io.open(valid_filepath, encoding="utf8")))
Exemplo n.º 7
0
def run_worker(rank, world_size):

    ######################################################################
    # Load and batch data
    # -------------------
    #

    ######################################################################
    # The training process uses Wikitext-2 dataset from ``torchtext``. The
    # vocab object is built based on the train dataset and is used to numericalize
    # tokens into tensors. Starting from sequential data, the ``batchify()``
    # function arranges the dataset into columns, trimming off any tokens remaining
    # after the data has been divided into batches of size ``batch_size``.
    # For instance, with the alphabet as the sequence (total length of 26)
    # and a batch size of 4, we would divide the alphabet into 4 sequences of
    # length 6:
    #
    # .. math::
    #   \begin{bmatrix}
    #   \text{A} & \text{B} & \text{C} & \ldots & \text{X} & \text{Y} & \text{Z}
    #   \end{bmatrix}
    #   \Rightarrow
    #   \begin{bmatrix}
    #   \begin{bmatrix}\text{A} \\ \text{B} \\ \text{C} \\ \text{D} \\ \text{E} \\ \text{F}\end{bmatrix} &
    #   \begin{bmatrix}\text{G} \\ \text{H} \\ \text{I} \\ \text{J} \\ \text{K} \\ \text{L}\end{bmatrix} &
    #   \begin{bmatrix}\text{M} \\ \text{N} \\ \text{O} \\ \text{P} \\ \text{Q} \\ \text{R}\end{bmatrix} &
    #   \begin{bmatrix}\text{S} \\ \text{T} \\ \text{U} \\ \text{V} \\ \text{W} \\ \text{X}\end{bmatrix}
    #   \end{bmatrix}
    #
    # These columns are treated as independent by the model, which means that
    # the dependence of ``G`` and ``F`` can not be learned, but allows more
    # efficient batch processing.
    #

    # In 'run_worker'
    def print_with_rank(msg):
        print('[RANK {}]: {}'.format(rank, msg))

    import io
    from torchtext.utils import download_from_url, extract_archive
    from torchtext.data.utils import get_tokenizer
    from torchtext.vocab import build_vocab_from_iterator

    url = 'https://s3.amazonaws.com/research.metamind.io/wikitext/wikitext-2-v1.zip'
    test_filepath, valid_filepath, train_filepath = extract_archive(
        download_from_url(url, root=".data{}".format(rank)))
    tokenizer = get_tokenizer('basic_english')
    vocab = build_vocab_from_iterator(
        map(tokenizer, iter(io.open(train_filepath, encoding="utf8"))))

    def data_process(raw_text_iter):
        data = [
            torch.tensor([vocab[token] for token in tokenizer(item)],
                         dtype=torch.long) for item in raw_text_iter
        ]
        return torch.cat(tuple(filter(lambda t: t.numel() > 0, data)))

    train_data = data_process(iter(io.open(train_filepath, encoding="utf8")))
    val_data = data_process(iter(io.open(valid_filepath, encoding="utf8")))
    test_data = data_process(iter(io.open(test_filepath, encoding="utf8")))
    device = torch.device(2 * rank)

    def batchify(data, bsz, rank, world_size, is_train=False):
        # Divide the dataset into bsz parts.
        nbatch = data.size(0) // bsz
        # Trim off any extra elements that wouldn't cleanly fit (remainders).
        data = data.narrow(0, 0, nbatch * bsz)
        # Evenly divide the data across the bsz batches.
        data = data.view(bsz, -1).t().contiguous()
        # Divide the data across the ranks only for training data.
        if is_train:
            data_per_rank = data.size(0) // world_size
            data = data[rank * data_per_rank:(rank + 1) * data_per_rank]
        return data.to(device)

    batch_size = 20
    eval_batch_size = 10
    train_data = batchify(train_data, batch_size, rank, world_size, True)
    val_data = batchify(val_data, eval_batch_size, rank, world_size)
    test_data = batchify(test_data, eval_batch_size, rank, world_size)

    ######################################################################
    # Functions to generate input and target sequence
    # ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    #

    ######################################################################
    # ``get_batch()`` function generates the input and target sequence for
    # the transformer model. It subdivides the source data into chunks of
    # length ``bptt``. For the language modeling task, the model needs the
    # following words as ``Target``. For example, with a ``bptt`` value of 2,
    # we’d get the following two Variables for ``i`` = 0:
    #
    # .. image:: ../_static/img/transformer_input_target.png
    #
    # It should be noted that the chunks are along dimension 0, consistent
    # with the ``S`` dimension in the Transformer model. The batch dimension
    # ``N`` is along dimension 1.
    #

    # In 'run_worker'
    bptt = 35

    def get_batch(source, i):
        seq_len = min(bptt, len(source) - 1 - i)
        data = source[i:i + seq_len]
        target = source[i + 1:i + 1 + seq_len].view(-1)
        return data, target

######################################################################
# Model scale and Pipe initialization
# -----------------------------------
#

######################################################################
# To demonstrate training large Transformer models using pipeline parallelism,
# we scale up the Transformer layers appropriately. We use an embedding
# dimension of 4096, hidden size of 4096, 16 attention heads and 8 total
# transformer layers (``nn.TransformerEncoderLayer``). This creates a model with
# **~1 billion** parameters.
#
# We need to initialize the `RPC Framework <https://pytorch.org/docs/stable/rpc.html>`__
# since Pipe depends on the RPC framework via `RRef <https://pytorch.org/docs/stable/rpc.html#rref>`__
# which allows for future expansion to cross host pipelining. We need to
# initialize the RPC framework with only a single worker since we're using a
# single process to drive multiple GPUs.
#
# The pipeline is then initialized with 8 transformer layers on one GPU and 8
# transformer layers on the other GPU. One pipe is setup across GPUs 0 and 1 and
# another across GPUs 2 and 3. Both pipes are then replicated using DistributedDataParallel.

# In 'run_worker'

    ntokens = len(vocab.stoi)  # the size of vocabulary
    emsize = 4096  # embedding dimension
    nhid = 4096  # the dimension of the feedforward network model in nn.TransformerEncoder
    nlayers = 8  # the number of nn.TransformerEncoderLayer in nn.TransformerEncoder
    nhead = 16  # the number of heads in the multiheadattention models
    dropout = 0.2  # the dropout value

    from torch.distributed import rpc
    tmpfile = tempfile.NamedTemporaryFile()
    rpc.init_rpc(
        name="worker",
        rank=0,
        world_size=1,
        rpc_backend_options=rpc.TensorPipeRpcBackendOptions(
            init_method="file://{}".format(tmpfile.name),
            # Specifying _transports and _channels is a workaround and we no longer
            # will have to specify _transports and _channels for PyTorch
            # versions >= 1.8.1
            _transports=["ibv", "uv"],
            _channels=["cuda_ipc", "cuda_basic"],
        ))

    # Num gpus for model parallelism.
    num_gpus = 2
    partition_len = ((nlayers - 1) // num_gpus) + 1

    # Add encoder in the beginning.
    tmp_list = [Encoder(ntokens, emsize, dropout).cuda(2 * rank)]
    module_list = []

    # Add all the necessary transformer blocks.
    for i in range(nlayers):
        transformer_block = TransformerEncoderLayer(emsize, nhead, nhid,
                                                    dropout)
        if i != 0 and i % (partition_len) == 0:
            module_list.append(nn.Sequential(*tmp_list))
            tmp_list = []
        device = i // (partition_len)
        tmp_list.append(transformer_block.to(2 * rank + device))

    # Add decoder in the end.
    tmp_list.append(Decoder(ntokens, emsize).cuda(2 * rank + num_gpus - 1))
    module_list.append(nn.Sequential(*tmp_list))

    # Need to use 'checkpoint=never' since as of PyTorch 1.8, Pipe checkpointing
    # doesn't work with DDP.
    from torch.distributed.pipeline.sync import Pipe
    model = Pipe(torch.nn.Sequential(*module_list),
                 chunks=8,
                 checkpoint="never")

    # Initialize process group and wrap model in DDP.
    from torch.nn.parallel import DistributedDataParallel
    import torch.distributed as dist
    os.environ['MASTER_ADDR'] = 'localhost'
    os.environ['MASTER_PORT'] = '29500'
    dist.init_process_group(backend="nccl", rank=rank, world_size=world_size)
    model = DistributedDataParallel(model)

    def get_total_params(module: torch.nn.Module):
        total_params = 0
        for param in module.parameters():
            total_params += param.numel()
        return total_params

    print_with_rank('Total parameters in model: {:,}'.format(
        get_total_params(model)))

    ######################################################################
    # Run the model
    # -------------
    #

    ######################################################################
    # `CrossEntropyLoss <https://pytorch.org/docs/master/nn.html?highlight=crossentropyloss#torch.nn.CrossEntropyLoss>`__
    # is applied to track the loss and
    # `SGD <https://pytorch.org/docs/master/optim.html?highlight=sgd#torch.optim.SGD>`__
    # implements stochastic gradient descent method as the optimizer. The initial
    # learning rate is set to 5.0. `StepLR <https://pytorch.org/docs/master/optim.html?highlight=steplr#torch.optim.lr_scheduler.StepLR>`__ is
    # applied to adjust the learn rate through epochs. During the
    # training, we use
    # `nn.utils.clip_grad_norm\_ <https://pytorch.org/docs/master/nn.html?highlight=nn%20utils%20clip_grad_norm#torch.nn.utils.clip_grad_norm_>`__
    # function to scale all the gradient together to prevent exploding.
    #

    # In 'run_worker'
    criterion = nn.CrossEntropyLoss()
    lr = 5.0  # learning rate
    optimizer = torch.optim.SGD(model.parameters(), lr=lr)
    scheduler = torch.optim.lr_scheduler.StepLR(optimizer, 1.0, gamma=0.95)

    import time

    def train():
        model.train()  # Turn on the train mode
        total_loss = 0.
        start_time = time.time()
        ntokens = len(vocab.stoi)

        # Train only for 50 batches to keep script execution time low.
        nbatches = min(50 * bptt, train_data.size(0) - 1)

        for batch, i in enumerate(range(0, nbatches, bptt)):
            data, targets = get_batch(train_data, i)
            optimizer.zero_grad()
            # Since the Pipe is only within a single host and process the ``RRef``
            # returned by forward method is local to this node and can simply
            # retrieved via ``RRef.local_value()``.
            output = model(data).local_value()
            # Need to move targets to the device where the output of the
            # pipeline resides.
            loss = criterion(output.view(-1, ntokens),
                             targets.cuda(2 * rank + 1))
            loss.backward()
            torch.nn.utils.clip_grad_norm_(model.parameters(), 0.5)
            optimizer.step()

            total_loss += loss.item()
            log_interval = 10
            if batch % log_interval == 0 and batch > 0:
                cur_loss = total_loss / log_interval
                elapsed = time.time() - start_time
                print_with_rank('| epoch {:3d} | {:5d}/{:5d} batches | '
                                'lr {:02.2f} | ms/batch {:5.2f} | '
                                'loss {:5.2f} | ppl {:8.2f}'.format(
                                    epoch, batch, nbatches // bptt,
                                    scheduler.get_lr()[0],
                                    elapsed * 1000 / log_interval, cur_loss,
                                    math.exp(cur_loss)))
                total_loss = 0
                start_time = time.time()

    def evaluate(eval_model, data_source):
        eval_model.eval()  # Turn on the evaluation mode
        total_loss = 0.
        ntokens = len(vocab.stoi)
        # Evaluate only for 50 batches to keep script execution time low.
        nbatches = min(50 * bptt, data_source.size(0) - 1)
        with torch.no_grad():
            for i in range(0, nbatches, bptt):
                data, targets = get_batch(data_source, i)
                output = eval_model(data).local_value()
                output_flat = output.view(-1, ntokens)
                # Need to move targets to the device where the output of the
                # pipeline resides.
                total_loss += len(data) * criterion(
                    output_flat, targets.cuda(2 * rank + 1)).item()
        return total_loss / (len(data_source) - 1)

######################################################################
# Loop over epochs. Save the model if the validation loss is the best
# we've seen so far. Adjust the learning rate after each epoch.

# In 'run_worker'

    best_val_loss = float("inf")
    epochs = 3  # The number of epochs
    best_model = None

    for epoch in range(1, epochs + 1):
        epoch_start_time = time.time()
        train()
        val_loss = evaluate(model, val_data)
        print_with_rank('-' * 89)
        print_with_rank(
            '| end of epoch {:3d} | time: {:5.2f}s | valid loss {:5.2f} | '
            'valid ppl {:8.2f}'.format(epoch, (time.time() - epoch_start_time),
                                       val_loss, math.exp(val_loss)))
        print_with_rank('-' * 89)

        if val_loss < best_val_loss:
            best_val_loss = val_loss
            best_model = model

        scheduler.step()

######################################################################
# Evaluate the model with the test dataset
# -------------------------------------
#
# Apply the best model to check the result with the test dataset.

# In 'run_worker'
    test_loss = evaluate(best_model, test_data)
    print_with_rank('=' * 89)
    print_with_rank(
        '| End of training | test loss {:5.2f} | test ppl {:8.2f}'.format(
            test_loss, math.exp(test_loss)))
    print_with_rank('=' * 89)
Exemplo n.º 8
0
    def _setup_datasets(
        url, top_n=-1, local_cache_path=".data", prepare_extractive=True
    ):
        FILE_NAME = "cnndm.tar.gz"
        maybe_download(url, FILE_NAME, local_cache_path)
        dataset_tar = os.path.join(local_cache_path, FILE_NAME)
        extracted_files = extract_archive(dataset_tar)
        for fname in extracted_files:
            if fname.endswith("train.txt.src"):
                train_source_file = fname
            if fname.endswith("train.txt.tgt.tagged"):
                train_target_file = fname
            if fname.endswith("test.txt.src"):
                test_source_file = fname
            if fname.endswith("test.txt.tgt.tagged"):
                test_target_file = fname

        if prepare_extractive:

            return (
                SummarizationDataset(
                    train_source_file,
                    target_file=train_target_file,
                    source_preprocessing=[_clean, tokenize.sent_tokenize],
                    target_preprocessing=[
                        _clean,
                        _remove_ttags,
                        _target_sentence_tokenization,
                    ],
                    word_tokenize=nltk.word_tokenize,
                    top_n=top_n,
                ),
                SummarizationDataset(
                    test_source_file,
                    target_file=test_target_file,
                    source_preprocessing=[_clean, tokenize.sent_tokenize],
                    target_preprocessing=[
                        _clean,
                        _remove_ttags,
                        _target_sentence_tokenization,
                    ],
                    word_tokenize=nltk.word_tokenize,
                    top_n=top_n,
                ),
            )
        else:
            return (
                SummarizationDataset(
                    train_source_file,
                    target_file=train_target_file,
                    source_preprocessing=[_clean, tokenize.sent_tokenize],
                    target_preprocessing=[
                        _clean,
                        _remove_ttags,
                        _target_sentence_tokenization,
                    ],
                    top_n=top_n,
                ),
                SummarizationDataset(
                    test_source_file,
                    target_file=test_target_file,
                    source_preprocessing=[_clean, tokenize.sent_tokenize],
                    target_preprocessing=[
                        _clean,
                        _remove_ttags,
                        _target_sentence_tokenization,
                    ],
                    top_n=top_n,
                ),
            )
Exemplo n.º 9
0
def _setup_datasets(dataset_name,
                    train_filenames, valid_filenames, test_filenames,
                    data_select, root):
    '''
    train_filenames=('train.de-en.de', 'train.de-en.en'),
    valid_filenames=('IWSLT16.TED.tst2013.de-en.de',
                           'IWSLT16.TED.tst2013.de-en.en'),
    test_filenames=('IWSLT16.TED.tst2014.de-en.de',
                          'IWSLT16.TED.tst2014.de-en.en'),
    data_select=('train', 'valid', 'test'), root='.data'
    '''
    print("## entered _setup_datasets")

    data_select = check_default_set(data_select, ('train', 'valid', 'test'))
    if not isinstance(train_filenames, tuple) and not isinstance(valid_filenames, tuple) \
            and not isinstance(test_filenames, tuple):
        raise ValueError("All filenames must be tuples")
    src_train, tgt_train = train_filenames
    src_eval, tgt_eval = valid_filenames
    src_test, tgt_test = test_filenames

    extracted_files = []  # list of paths to the extracted files
    if isinstance(URLS[dataset_name], list):
        for idx, f in enumerate(URLS[dataset_name]):
            dataset_tar = download_from_url(
                f, root=root, hash_value=MD5[dataset_name][idx], hash_type='md5')
            extracted_files.extend(extract_archive(dataset_tar))
    # IWSLT will go into this one
    elif isinstance(URLS[dataset_name], str):
        dataset_tar = download_from_url(URLS[dataset_name])
        print("#dataset_tar: ", dataset_tar)
        extracted_dataset_tar = extract_archive(dataset_tar)

        if dataset_name == 'IWSLT':
            print('## It is IWSLT!!!')
            src_language = train_filenames[0].split(".")[-1]
            tgt_language = train_filenames[1].split(".")[-1]
            languages = "-".join([src_language, tgt_language])
            # this is what was downloaded from the original iwslt url. now we need to pick this out from all the languages downloaded
            iwslt_tar_name = '.data/2016-01/texts/{}/{}/{}.tgz'
            iwslt_tar_name = iwslt_tar_name.format(
                src_language, tgt_language, languages)
            print('## iwslt_tar_name: ', iwslt_tar_name)
            extracted_iwslt_tar = extract_archive(iwslt_tar_name)
            # extracted_iwslt_tar = extract_archive('.data/2016-01/texts/de/en/de-en.tgz')
            print('## extracted_iwslt_tar', extracted_iwslt_tar)
            extracted_files.extend(extracted_iwslt_tar)

        else:
            extracted_files.extend(extracted_dataset_tar)
        # print("#extracted_files: ", extracted_files)
        # print('extracted_dataset_tar', extracted_dataset_tar)

    else:
        raise ValueError(
            "URLS for {} has to be in a form or list or string".format(
                dataset_name))

    # Clean the xml and tag file in the archives
    file_archives = []
    for fname in extracted_files:
        if 'xml' in fname:
            _clean_xml_file(fname)
            file_archives.append(os.path.splitext(fname)[0])
        elif "tags" in fname:
            _clean_tags_file(fname)
            file_archives.append(fname.replace('.tags', ''))
        else:
            file_archives.append(fname)
Exemplo n.º 10
0
def _setup_datasets(dataset_name, train_filenames, valid_filenames,
                    test_filenames, split, root, offset):
    if not isinstance(train_filenames, tuple) and not isinstance(valid_filenames, tuple) \
            and not isinstance(test_filenames, tuple):
        raise ValueError("All filenames must be tuples")
    src_train, tgt_train = train_filenames
    src_eval, tgt_eval = valid_filenames
    src_test, tgt_test = test_filenames

    extracted_files = []  # list of paths to the extracted files
    if isinstance(URLS[dataset_name], list):
        for idx, f in enumerate(URLS[dataset_name]):
            dataset_tar = download_from_url(f,
                                            root=root,
                                            hash_value=MD5[dataset_name][idx],
                                            hash_type='md5')
            extracted_files.extend(extract_archive(dataset_tar))
    elif isinstance(URLS[dataset_name], str):
        dataset_tar = download_from_url(URLS[dataset_name],
                                        root=root,
                                        hash_value=MD5[dataset_name],
                                        hash_type='md5')
        extracted_dataset_tar = extract_archive(dataset_tar)
        if dataset_name == 'IWSLT':
            # IWSLT dataset's url downloads a multilingual tgz.
            # We need to take an extra step to pick out the specific language pair from it.
            src_language = train_filenames[0].split(".")[-1]
            tgt_language = train_filenames[1].split(".")[-1]
            languages = "-".join([src_language, tgt_language])
            iwslt_tar = '.data/2016-01/texts/{}/{}/{}.tgz'
            iwslt_tar = iwslt_tar.format(src_language, tgt_language, languages)
            extracted_dataset_tar = extract_archive(iwslt_tar)
        extracted_files.extend(extracted_dataset_tar)
    else:
        raise ValueError(
            "URLS for {} has to be in a form or list or string".format(
                dataset_name))

    # Clean the xml and tag file in the archives
    file_archives = []
    for fname in extracted_files:
        if 'xml' in fname:
            _clean_xml_file(fname)
            file_archives.append(os.path.splitext(fname)[0])
        elif "tags" in fname:
            _clean_tags_file(fname)
            file_archives.append(fname.replace('.tags', ''))
        else:
            file_archives.append(fname)

    data_filenames = defaultdict(dict)
    data_filenames = {
        "train": _construct_filepaths(file_archives, src_train, tgt_train),
        "valid": _construct_filepaths(file_archives, src_eval, tgt_eval),
        "test": _construct_filepaths(file_archives, src_test, tgt_test)
    }

    for key in data_filenames.keys():
        if len(data_filenames[key]) == 0 or data_filenames[key] is None:
            raise FileNotFoundError(
                "Files are not found for data type {}".format(key))

    datasets = []
    for key in split:
        src_data_iter = _read_text_iterator(data_filenames[key][0])
        tgt_data_iter = _read_text_iterator(data_filenames[key][1])

        def _iter(src_data_iter, tgt_data_iter):
            for item in zip(src_data_iter, tgt_data_iter):
                yield item

        datasets.append(
            RawTextIterableDataset(dataset_name,
                                   NUM_LINES[dataset_name][key],
                                   _iter(src_data_iter, tgt_data_iter),
                                   offset=offset))

    return datasets
Exemplo n.º 11
0
def IWSLT2017(root='.data',
              split=('train', 'valid', 'test'),
              language_pair=('de', 'en')):
    """IWSLT2017 dataset

    The available datasets include following:

    **Language pairs**:

    +-----+-----+-----+-----+-----+-----+
    |     |'en' |'nl' |'de' |'it' |'ro' |
    +-----+-----+-----+-----+-----+-----+
    |'en' |     |   x |  x  |  x  |  x  |
    +-----+-----+-----+-----+-----+-----+
    |'nl' |  x  |     |  x  |  x  |  x  |
    +-----+-----+-----+-----+-----+-----+
    |'de' |  x  |   x |     |  x  |  x  |
    +-----+-----+-----+-----+-----+-----+
    |'it' |  x  |   x |  x  |     |  x  |
    +-----+-----+-----+-----+-----+-----+
    |'ro' |  x  |   x |  x  |  x  |     |
    +-----+-----+-----+-----+-----+-----+


    For additional details refer to source website: https://wit3.fbk.eu/2017-01

    Args:
        root: Directory where the datasets are saved. Default: ".data"
        split: split or splits to be returned. Can be a string or tuple of strings. Default: (‘train’, ‘valid’, ‘test’)
        language_pair: tuple or list containing src and tgt language

    Examples:
        >>> from torchtext.datasets import IWSLT2017
        >>> train_iter, valid_iter, test_iter = IWSLT2017()
        >>> src_sentence, tgt_sentence = next(train_iter)

    """

    valid_set = 'dev2010'
    test_set = 'tst2010'

    num_lines_set_identifier = {
        'train': 'train',
        'valid': valid_set,
        'test': test_set
    }

    if not isinstance(language_pair, list) and not isinstance(
            language_pair, tuple):
        raise ValueError(
            "language_pair must be list or tuple but got {} instead".format(
                type(language_pair)))

    assert (
        len(language_pair) == 2
    ), 'language_pair must contain only 2 elements: src and tgt language respectively'

    src_language, tgt_language = language_pair[0], language_pair[1]

    if src_language not in SUPPORTED_DATASETS['language_pair']:
        raise ValueError(
            "src_language '{}' is not valid. Supported source languages are {}"
            .format(src_language, list(SUPPORTED_DATASETS['language_pair'])))

    if tgt_language not in SUPPORTED_DATASETS['language_pair'][src_language]:
        raise ValueError(
            "tgt_language '{}' is not valid for give src_language '{}'. Supported target language are {}"
            .format(tgt_language, src_language,
                    SUPPORTED_DATASETS['language_pair'][src_language]))

    train_filenames = ('train.{}-{}.{}'.format(src_language, tgt_language,
                                               src_language),
                       'train.{}-{}.{}'.format(src_language, tgt_language,
                                               tgt_language))
    valid_filenames = ('IWSLT{}.TED.{}.{}-{}.{}'.format(
        SUPPORTED_DATASETS['year'], valid_set, src_language, tgt_language,
        src_language), 'IWSLT{}.TED.{}.{}-{}.{}'.format(
            SUPPORTED_DATASETS['year'], valid_set, src_language, tgt_language,
            tgt_language))
    test_filenames = ('IWSLT{}.TED.{}.{}-{}.{}'.format(
        SUPPORTED_DATASETS['year'], test_set, src_language, tgt_language,
        src_language), 'IWSLT{}.TED.{}.{}-{}.{}'.format(
            SUPPORTED_DATASETS['year'], test_set, src_language, tgt_language,
            tgt_language))

    src_train, tgt_train = train_filenames
    src_eval, tgt_eval = valid_filenames
    src_test, tgt_test = test_filenames

    extracted_files = []  # list of paths to the extracted files
    dataset_tar = download_from_url(SUPPORTED_DATASETS['URL'],
                                    root=root,
                                    hash_value=SUPPORTED_DATASETS['MD5'],
                                    path=os.path.join(
                                        root, SUPPORTED_DATASETS['_PATH']),
                                    hash_type='md5')
    extracted_dataset_tar = extract_archive(dataset_tar)
    # IWSLT dataset's url downloads a multilingual tgz.
    # We need to take an extra step to pick out the specific language pair from it.
    src_language = train_filenames[0].split(".")[-1]
    tgt_language = train_filenames[1].split(".")[-1]

    iwslt_tar = os.path.join(root, SUPPORTED_DATASETS['_PATH'].split(".")[0],
                             'texts/DeEnItNlRo/DeEnItNlRo',
                             'DeEnItNlRo-DeEnItNlRo.tgz')
    extracted_dataset_tar = extract_archive(iwslt_tar)
    extracted_files.extend(extracted_dataset_tar)

    # Clean the xml and tag file in the archives
    file_archives = []
    for fname in extracted_files:
        if 'xml' in fname:
            _clean_xml_file(fname)
            file_archives.append(os.path.splitext(fname)[0])
        elif "tags" in fname:
            _clean_tags_file(fname)
            file_archives.append(fname.replace('.tags', ''))
        else:
            file_archives.append(fname)

    data_filenames = {
        "train": _construct_filepaths(file_archives, src_train, tgt_train),
        "valid": _construct_filepaths(file_archives, src_eval, tgt_eval),
        "test": _construct_filepaths(file_archives, src_test, tgt_test)
    }
    for key in data_filenames:
        if len(data_filenames[key]) == 0 or data_filenames[key] is None:
            raise FileNotFoundError(
                "Files are not found for data type {}".format(key))

    src_data_iter = _read_text_iterator(data_filenames[split][0])
    tgt_data_iter = _read_text_iterator(data_filenames[split][1])

    def _iter(src_data_iter, tgt_data_iter):
        for item in zip(src_data_iter, tgt_data_iter):
            yield item

    return _RawTextIterableDataset(
        DATASET_NAME, NUM_LINES[split][num_lines_set_identifier[split]][tuple(
            sorted(language_pair))], _iter(src_data_iter, tgt_data_iter))
Exemplo n.º 12
0
    parser.add_argument(
        "--mlpipeline_ui_metadata",
        type=str,
        help="Path to write mlpipeline-ui-metadata.json",
    )

    args = vars(parser.parse_args())

    dataset_url = args["dataset_url"]
    output_path = args["output_path"]

    Path(output_path).mkdir(parents=True, exist_ok=True)

    dataset_tar = download_from_url(dataset_url, root="./")
    extracted_files = extract_archive(dataset_tar)

    ag_news_csv = pv.read_csv("ag_news_csv/train.csv")

    pq.write_table(ag_news_csv,
                   os.path.join(output_path, "ag_news_data.parquet"))

    entry_point = ["ls", "-R", output_path]
    run_code = subprocess.run(entry_point, stdout=subprocess.PIPE)
    print(run_code.stdout)

    visualization_arguments = {
        "inputs": {
            "dataset_url": args["dataset_url"]
        },
        "output": {
Exemplo n.º 13
0
def GloVe(name="840B",
          dim=300,
          unk_tensor=None,
          root=".data",
          validate_file=True,
          num_cpus=32):
    r"""Create a GloVe Vectors object.

    Args:
        name (str): the name of the GloVe dataset to use. Options are:
            - 42B
            - 840B
            - twitter.27B
            - 6B
        dim (int): the dimension for the GloVe dataset to load. Options are:
            42B:
                - 300
            840B:
                - 300
            twitter.27B:
                - 25
                - 50
                - 100
                - 200
            6B:
                - 50
                - 100
                - 200
                - 300
        unk_tensor (Tensor): a 1d tensor representing the vector associated with an unknown token.
        root (str): folder used to store downloaded files in (.data)
        validate_file (bool): flag to determine whether to validate the downloaded files checksum.
                              Should be `False` when running tests with a local asset.
        num_cpus (int): the number of cpus to use when loading the vectors from file. Default: 10.
    Returns:
        Vectors: a Vectors object.

    Raises:
        ValueError: if unexpected duplicate tokens are found in GloVe file.

    """
    dup_token_glove_840b = [
        "����������������������������������������������������������������������"
        "����������������������������������������������������������������������"
        "����������������������������������������������������������������������"
        "����������������������������������������������������������������������"
        "������������������������������������������������������"
    ]
    urls = {
        "42B": "https://nlp.stanford.edu/data/glove.42B.300d.zip",
        "840B": "https://nlp.stanford.edu/data/glove.840B.300d.zip",
        "twitter.27B": "https://nlp.stanford.edu/data/glove.twitter.27B.zip",
        "6B": "https://nlp.stanford.edu/data/glove.6B.zip",
    }
    valid_glove_file_names = {
        "glove.42B.300d.txt", "glove.840B.300d.txt",
        "glove.twitter.27B.25d.txt", "glove.twitter.27B.50d.txt",
        "glove.twitter.27B.100d.txt", "glove.twitter.27B.200d.txt",
        "glove.6B.50d.txt", "glove.6B.100d.txt", "glove.6B.200d.txt",
        "glove.6B.300d.txt"
    }

    file_name = "glove.{}.{}d.txt".format(name, str(dim))
    if file_name not in valid_glove_file_names:
        raise ValueError(
            "Could not find GloVe file with name {}. Please check that `name` and `dim`"
            "are valid.".format(str(file_name)))

    url = urls[name]
    checksum = None
    if validate_file:
        checksum = CHECKSUMS_GLOVE.get(url, None)

    downloaded_file_path = download_from_url(url,
                                             root=root,
                                             hash_value=checksum)
    extracted_file_paths = extract_archive(downloaded_file_path)
    # need to get the full path to the correct file in the case when multiple files are extracted with different dims
    extracted_file_path_with_correct_dim = [
        path for path in extracted_file_paths if file_name in path
    ][0]
    cpp_vectors_obj, dup_tokens = _load_token_and_vectors_from_file(
        extracted_file_path_with_correct_dim, ' ', num_cpus, unk_tensor)

    # Ensure there is only 1 expected duplicate token present for 840B dataset
    if dup_tokens and dup_tokens != dup_token_glove_840b:
        raise ValueError("Found duplicate tokens in file: {}".format(
            str(dup_tokens)))

    vectors_obj = Vectors(cpp_vectors_obj)
    return vectors_obj
Exemplo n.º 14
0
import logging
import argparse

from torchtext.utils import extract_archive
from torchtext.utils import download_from_url

parser = argparse.ArgumentParser(
    description='Download and extract a given dataset')
parser.add_argument('--url',
                    default='http://www.quest.dcs.shef.ac.uk/wmt16_files_mmt/'
                    'validation.tar.gz')
parser.add_argument('--data', default='validation.tar.gz')
parser.add_argument('--logging-level', default='WARNING')
args = parser.parse_args()

logging.basicConfig(level=getattr(logging, args.logging_level))

tar_file = download_from_url(args.url, args.data)
extracted_files = extract_archive(args.data, 'extracted_files')
Exemplo n.º 15
0
    def forward(self, x):
        x = x + self.pe[:x.size(0), :]
        return self.dropout(x)
    
import io
import torch
from torchtext.utils import download_from_url, extract_archive
from torchtext.data.utils import get_tokenizer
from torchtext.vocab import build_vocab_from_iterator



#url = 'https://s3.amazonaws.com/research.metamind.io/wikitext/wikitext-2-v1.zip'
root='C:/myapp/OneDrive/Mycode/python/pytorch/data/wikitext-2-v1.zip'
#test_filepath, valid_filepath, train_filepath = extract_archive(download_from_url(url,root))
test_filepath, valid_filepath, train_filepath = extract_archive(root)
tokenizer = get_tokenizer('basic_english')
vocab = build_vocab_from_iterator(map(tokenizer,
                                      iter(io.open(train_filepath,
                                                   encoding="utf8"))))

def data_process(raw_text_iter):
  data = [torch.tensor([vocab[token] for token in tokenizer(item)],
                       dtype=torch.long) for item in raw_text_iter]
  return torch.cat(tuple(filter(lambda t: t.numel() > 0, data)))

train_data = data_process(iter(io.open(train_filepath, encoding="utf8")))
val_data = data_process(iter(io.open(valid_filepath, encoding="utf8")))
test_data = data_process(iter(io.open(test_filepath, encoding="utf8")))

device = torch.device("cuda" if torch.cuda.is_available() else "cpu")
Exemplo n.º 16
0
def _setup_datasets(dataset_name,
                    tokenizer=tokenizer,
                    root='.data',
                    vocab=None,
                    removed_tokens=[],
                    data_select=('train', 'test', 'valid'),
                    bptt=None,
                    batch_size=64):

    if isinstance(data_select, str):
        data_select = [data_select]
    if not set(data_select).issubset(set(('train', 'test', 'valid'))):
        raise TypeError('data_select is not supported!')

    print(tokenizer)
    if tokenizer is None:
        tokenizer = get_tokenizer('basic_english')

    if dataset_name == 'PennTreebank':
        extracted_files = []
        select_to_index = {'train': 0, 'test': 1, 'valid': 2}
        extracted_files = [
            download_from_url(URLS['PennTreebank'][select_to_index[key]],
                              root=root) for key in data_select
        ]
    elif dataset_name == 'HumanNumbers':
        extracted_files = [
            '/Users/ssaurabh/.fastai/data/human_numbers/train.txt',
            '/Users/ssaurabh/.fastai/data/human_numbers/valid.txt'
        ]
    else:
        dataset_tar = download_from_url(URLS[dataset_name], root=root)
        extracted_files = extract_archive(dataset_tar)

    _path = {}
    for item in data_select:
        _path[item] = _get_datafile_path(item, extracted_files)

    #print(_path)

    if vocab is None:
        if 'train' not in _path.keys():
            raise TypeError("Must pass a vocab if train is not selected.")
        logging.info('Building Vocab based on {}'.format(_path['train']))
        txt_iter = iter(
            tokenizer(row) for row in io.open(_path['train'], encoding="utf8"))
        vocab = build_vocab_from_iterator(txt_iter)
        logging.info('Vocab has {} entries'.format(len(vocab)))
    else:
        if not isinstance(vocab, Vocab):
            raise TypeError("Passed vocabulary is not of type Vocab")

    data = {}
    raw_data = {}
    for item in _path.keys():
        data[item] = []
        raw_data[item] = []
        logging.info('Creating {} data'.format(item))
        txt_iter = iter(
            tokenizer(row) for row in io.open(_path[item], encoding="utf8"))

        for txt in txt_iter:
            raw_data[item] += txt

        txt_iter = iter(
            tokenizer(row) for row in io.open(_path[item], encoding="utf8"))
        _iter = numericalize_tokens_from_iterator(vocab, txt_iter,
                                                  removed_tokens)
        for tokens in _iter:
            data[item] += [token_id for token_id in tokens]

    for key in data_select:
        if data[key] == []:
            raise TypeError('Dataset {} is empty!'.format(key))

    if bptt is None:
        return tuple(
            LanguageModelingDataset(
                torch.tensor(data[d]).long(), vocab, raw_data[d])
            for d in data_select)
    else:
        #### generate input and labels
        input_data = {}
        label_data = {}
        for key in data_select:
            #### Extend the dataset such that the last batch is not left out
            recycled_data_len = (bptt *
                                 batch_size) - (len(data[key]) %
                                                (bptt * batch_size)) + bptt
            data[key] = data[key] + data[key][0:recycled_data_len]
            input_d = []
            label_d = []
            for i in range(len(data[key]) - bptt):
                input_d.append(data[key][i:i + bptt])
                label_d.append(data[key][i + 1:i + bptt + 1])
            print(len(input_d))
            print(len(label_d))
            input_data[key] = torch.tensor(input_d)
            label_data[key] = torch.tensor(label_d)
            print(input_data[key].shape)
            print(label_data[key].shape)

            #input_d = torch.tensor(data[key]).long()
            ###reshape the input data
            #if input_d.shape[0]%bptt > 0:
            #    pad_len_input = bptt - input_d.shape[0]%bptt
            #else:
            #    pad_len_input = 0
            #input_d = torch.nn.functional.pad(input_d, (0, pad_len_input), mode='constant', value=1)

            #input_data[key] = input_d.reshape(int(input_d.shape[0]/bptt),bptt)

            #if input_d[1:].shape[0]%bptt > 0:
            #    pad_len_output = bptt - input_d[1:].shape[0]%bptt
            #else:
            #    pad_len_output = 0

            #input_d = torch.nn.functional.pad(input_d[1:], (0, pad_len_output), mode='constant', value=1)
            #label_data[key] = input_d.reshape(int(input_d.shape[0]/bptt),bptt)

        return tuple(
            HumanLanguageModelingDataset(input_data[d], vocab, label_data[d])
            for d in data_select)