cerebras.modelzoo.data.nlp.bert.BertCSVDataProcessor.BertCSVDataProcessor#

class cerebras.modelzoo.data.nlp.bert.BertCSVDataProcessor.BertCSVDataProcessor(*args, **kwargs)[source]#

Bases: torch.utils.data.IterableDataset

Reads csv files containing the input text tokens, and MLM features. :param <dict> params: dict containing input parameters for creating dataset. Expects the following fields:

  • “data_dir” (string): path to the data files to use.

  • “batch_size” (int): Batch size.

  • “shuffle” (bool): Flag to enable data shuffling.

  • “shuffle_seed” (int): Shuffle seed.

  • “shuffle_buffer” (int): Shuffle buffer size.

  • “dynamic_mlm_scale” (bool): Flag to dynamically scale the loss.

  • “num_workers” (int): How many subprocesses to use for data loading.

  • “drop_last” (bool): If True and the dataset size is not divisible

    by the batch size, the last incomplete batch will be dropped.

  • “prefetch_factor” (int): Number of samples loaded in advance by each worker.

  • “persistent_workers” (bool): If True, the data loader will not shutdown

    the worker processes after a dataset has been consumed once.

  • “mixed_precision” (bool): Casts input mask to fp16 if set to True. Otherwise, the generated mask is float32.

Methods

create_dataloader

Classmethod to create the dataloader object.

get_single_item

Iterating over the data to construct input features.

load_buffer

Generator to read the data in chunks of size of data_buffer.
load_buffer()[source]#

Generator to read the data in chunks of size of data_buffer.

Returns

Yields the data stored in the data_buffer.

get_single_item()[source]#

Iterating over the data to construct input features.

Returns

A tuple with training features: * np.array[int.32] input_ids: Numpy array with input token indices.

Shape: (max_sequence_length).

  • np.array[int.32] labels: Numpy array with labels.

    Shape: (max_sequence_length).

  • np.array[int.32] attention_mask

    Shape: (max_sequence_length).

  • np.array[int.32] token_type_ids: Numpy array with segment indices.

    Shape: (max_sequence_length).

  • np.array[int.32] next_sentence_label: Numpy array with labels for NSP task.

    Shape: (1).

  • np.array[int.32] masked_lm_mask: Numpy array with a mask of

    predicted tokens. Shape: (max_predictions) 0 indicates the non masked token, and 1 indicates the masked token.

create_dataloader()[source]#

Classmethod to create the dataloader object.

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