class_docstr: Pipeline Model
class_docstr_tok: ["Pipeline","Model"]
code: def _load_pipeline(self, fpath=None) -> str:
      if fpath is None:
          fpath = str(Path(__file__).parent.resolve() / "pipe.pickle")
      with open(fpath, "rb") as f:
          dag_repr = pickle.load(f)
          self.pipe = RuntimePipeline(dag_repr)
          self.pipe.preload()
  
file_path: towhee/towhee/serve/triton/bls/pipeline_model.py
imports: import logging
  from pathlib import Path
  import numpy
  import dill
  from towhee.serve.triton.bls.python_backend_wrapper import pb_utils
  from towhee.runtime.runtime_pipeline import RuntimePipeline
  from towhee.utils.serializer import to_json, from_json
label_desc: Use image node_id 3 for calling the TritonPythonModel obj's underlying member method code with example usage: obj._load_pipeline(fpath) without return types