Fixed error on Python 2

            % (task, str(task_dataset.get_shape())), self.verbosity)

    return task_datasets

  def _to_singletask(self, dataset, task_dirs):

  @staticmethod

  def _to_singletask(dataset, task_dirs):

    """Transforms a multitask dataset to a collection of singletask datasets."""

    tasks = dataset.get_task_names()

    assert len(tasks) == len(task_dirs)

    try:

      for task in range(num_tasks):

        task_dirs.append(tempfile.mkdtemp())

      singletask_datasets = SingletaskToMultitask._to_singletask(None, dataset, task_dirs)

      singletask_datasets = SingletaskToMultitask._to_singletask(dataset, task_dirs)

      for task in range(num_tasks):

        singletask_dataset = singletask_datasets[task]

        X_task, y_task, w_task, ids_task = (singletask_dataset.X, singletask_dataset.y, singletask_dataset.w, singletask_dataset.ids)