code: def __init__(self, gpu=None, **kw):
      super().__init__(gpu=gpu, **kw)
      if self.output_types is None:
          self.output_types = [OutputType.object]
  
imports: import itertools
  import logging
  import pickle
  from collections import OrderedDict, defaultdict
  import numpy
  from ....None import opcodes
  from ....core import OutputType
  from ....core.context import get_context
  from ....core.operand import MergeDictOperand
  from ....serialization.serializables import FieldTypes, DictField, KeyField, ListField
  from ....utils import ensure_own_data
  from .dmatrix import ToDMatrix, to_dmatrix
  from .start_tracker import StartTracker
label_desc: Use image node_id 1 to create a new XGBTrain object from inherited base classes: MergeDictOperand with example: obj = XGBTrain(gpu)