    def setup_task(cls, args, **kwargs):
        """Setup the task (e.g., load dictionaries).

        Args:
            args (argparse.Namespace): parsed command-line arguments
        """
        dictionary, output_dictionary = cls.setup_dictionary(args, **kwargs)

        # upgrade old checkpoints
        if getattr(args, "exclude_self_target", False):
            args.self_target = False

        targets = []
        if getattr(args, "self_target", False):
            targets.append("self")
        if getattr(args, "future_target", False):
            targets.append("future")
        if getattr(args, "past_target", False):
            targets.append("past")
        if len(targets) == 0:
            # standard language modeling
            targets = ["future"]

        return cls(args, dictionary, output_dictionary, targets=targets)
Setup the task (e.g., load dictionaries).

Args:
args (argparse.Namespace): parsed command-line arguments
fairseq/tasks/language_modeling.py