code: def __init__(self):
      self._progress_bar = None
      super().__init__()
  
file_path: BigDL/python/orca/src/bigdl/orca/learn/pytorch/callbacks/tqdm.py
imports: from bigdl.orca.learn.pytorch.callbacks import Callback
  from bigdl.dllib.utils.log4Error import invalidInputError
label_desc: Use image node_id 1 to create a new TqdmCallback object from inherited base classes: Callback with example: obj = TqdmCallback()