code: def __init__(self, obj):
      message = (
          f" You are trying to use {obj} without installing all of pytorch_lightning, hydra, and "
          f"omegaconf. Please install those packages before trying to access {obj}."
      )
      super().__init__(message)
  
file_path: NeMo/nemo/utils/exceptions.py
label_desc: Use image node_id 1 to create a new LightningNotInstalledException object from inherited base classes: NeMoBaseException with example: obj = LightningNotInstalledException(obj)