code: def test_python_operator_and_custom_plugin(self):
      load_empty_plugin()
      ops.readers.TFRecord(
          path="dummy", index_path="dummy", features={}
      )
  
imports: from nvidia.dali.pipeline import Pipeline
  import nvidia.dali
  import nvidia.dali.ops
  import nvidia.dali.plugin_manager
  import unittest
  import os
  import numpy
  import tempfile
label_desc: Use image node_id 6 for calling the TestLoadedPlugin obj's underlying member method code with example usage: obj.test_python_operator_and_custom_plugin() without return types