code: def __len__(self):
      return len(self.rules)
  
file_path: PaddleSeg/contrib/QualityInspector/qinspector/ops/postprocess.py
imports: from qinspector.cvlib.workspace import create, register
  from qinspector.utils.logger import setup_logger
label_desc: Use image node_id 3 for calling the PostProcess obj's underlying member method code with example usage: obj.__len__() and returns: len