code: def is_positional_arg(self):
      return isinstance(self.name, int)
  
imports: import os
  import random
  import numpy
  from typing import List, Union, Callable, Optional
  from dataclasses import dataclass, field
  from nvidia.dali import pipeline_def
  import nvidia.dali.fn
  from nvidia.dali import types
  import nvidia.dali.tensors
  from test_utils import get_dali_extra_path, check_batch
label_desc: Use image node_id 2 for calling the ArgDesc obj's underlying member method code with example usage: obj.is_positional_arg() and returns: isinstance