    def __init__(
        self,
        src_dataset,
        src_dict,
        seed,
        noiser=None,
        noising_class=UnsupervisedMTNoising,
        **kwargs
    ):
        """
        Wrap a :class:`~torch.utils.data.Dataset` and apply noise to the
        samples based on the supplied noising configuration.

        Args:
            src_dataset (~torch.utils.data.Dataset): dataset to wrap.
                to build self.src_dataset --
                a LanguagePairDataset with src dataset as the source dataset and
                None as the target dataset. Should NOT have padding so that
                src_lengths are accurately calculated by language_pair_dataset
                collate function.
                We use language_pair_dataset here to encapsulate the tgt_dataset
                so we can re-use the LanguagePairDataset collater to format the
                batches in the structure that SequenceGenerator expects.
            src_dict (~fairseq.data.Dictionary): source dictionary
            seed (int): seed to use when generating random noise
            noiser (WordNoising): a pre-initialized :class:`WordNoising`
                instance. If this is None, a new instance will be created using
                *noising_class* and *kwargs*.
            noising_class (class, optional): class to use to initialize a
                default :class:`WordNoising` instance.
            kwargs (dict, optional): arguments to initialize the default
                :class:`WordNoising` instance given by *noiser*.
        """
        self.src_dataset = src_dataset
        self.src_dict = src_dict
        self.seed = seed
        self.noiser = (
            noiser
            if noiser is not None
            else noising_class(
                dictionary=src_dict,
                **kwargs,
            )
        )
        self.sizes = src_dataset.sizes
Wrap a :class:`~torch.utils.data.Dataset` and apply noise to the
samples based on the supplied noising configuration.

Args:
src_dataset (~torch.utils.data.Dataset): dataset to wrap.
to build self.src_dataset --
a LanguagePairDataset with src dataset as the source dataset and
None as the target dataset. Should NOT have padding so that
src_lengths are accurately calculated by language_pair_dataset
collate function.
We use language_pair_dataset here to encapsulate the tgt_dataset
so we can re-use the LanguagePairDataset collater to format the
batches in the structure that SequenceGenerator expects.
src_dict (~fairseq.data.Dictionary): source dictionary
seed (int): seed to use when generating random noise
noiser (WordNoising): a pre-initialized :class:`WordNoising`
instance. If this is None, a new instance will be created using
*noising_class* and *kwargs*.
noising_class (class, optional): class to use to initialize a
default :class:`WordNoising` instance.
kwargs (dict, optional): arguments to initialize the default
:class:`WordNoising` instance given by *noiser*.
fairseq/data/noising.py