code: def setUpModule():
      global g_root
      global g_files
      global g_tmpdir
  
      g_tmpdir = tempfile.TemporaryDirectory()
      g_root = g_tmpdir.__enter__()
      g_files = [
          str(i) + " x.dat" for i in range(10)
      ]  # name with a space in the middle!
      populate(g_root, g_files)
  
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 3 for calling a global function with example usage: setUpModule() without return types