code: def file_pipe(file_op, file_list):
      files, labels = file_op(file_list=file_list)
      return files, labels
  
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 11 for calling a global function with example usage: file_pipe(file_op, file_list) and returns: files,  labels