code: def patches(self, mocker):
      Patches = namedtuple(
          "Patches",
          ["mock_open", "os_path", "is_file", "open_signature"],
      )
      patches = Patches(
          mocker.patch("ts.model_loader.open"),
          mocker.patch("os.path.exists"),
          mocker.patch("os.path.isfile"),
          mocker.patch("ts.model_service.model_service.open"),
      )
      patches.os_path.return_value = True
  
      return patches
  
imports: import importlib
  import inspect
  import os
  import sys
  import types
  from collections import namedtuple
  import mock
  import pytest
  from ts.model_loader import ModelLoaderFactory, TsModelLoader
  from ts.model_service.model_service import SingleNodeService
  from ts.torch_handler.request_envelope.json import JSONEnvelope
  from ts.utils.util import list_classes_from_module
label_desc: Use image node_id 2 for calling the TestLoadModels obj's underlying member method code with example usage: obj.patches(mocker) and returns: patches