code: def _nargs(self):
      return -1
  
file_path: BigDL/python/nano/src/bigdl/nano/deps/neural_compressor/pytorch/quantized_model.py
imports: from pathlib import Path
  import yaml
  import os
  import operator
  import torch
  from bigdl.nano.pytorch.model import AcceleratedLightningModule
  from ..core import version
  from neural_compressor.utils.pytorch import load
  from neural_compressor.model.model import PyTorchModel
  from bigdl.nano.utils.common import invalidInputError
  from bigdl.nano.pytorch.context_manager import generate_context_manager
  from bigdl.nano.pytorch.lightning import LightningModule
  from bigdl.nano.utils.common import compare_version
label_desc: Use image node_id 2 for calling the PytorchQuantizedModel obj's underlying member method code with example usage: obj._nargs() and returns: unknown