code: def ref_contents(path):
      fname = path[path.rfind("/") + 1 :]
      return "Contents of " + fname + ".\n"
  
imports: import glob
  import numpy
  import nvidia.dali.fn
  import os
  import random
  import tempfile
  from nvidia.dali import Pipeline, pipeline_def
  from nose_utils import assert_raises
  from test_utils import compare_pipelines
label_desc: Use image node_id 1 for calling a global function with example usage: ref_contents(path) and returns: unknown