code: def __init__(
      self, dataset, prepend_getter, ensure_first_token_is=None
  ):
      super().__init__(dataset)
      self.prepend_getter = prepend_getter
      self.ensure_first_token = ensure_first_token_is
  
imports: import numpy
  import torch
  from .None import BaseWrapperDataset
label_desc: Use image node_id 1 to create a new PrependDataset object from inherited base classes: BaseWrapperDataset with example: obj = PrependDataset(dataset, prepend_getter, ensure_first_token_is)