code: def standard_global_callback(sample_info):
      return np.full((10, 20), sample_info.idx_in_batch, dtype=np.uint8)
  
imports: import copyreg
  import numpy
  import nvidia.dali.fn
  import nvidia.dali.pickling
  import os
  from nvidia.dali import pipeline_def
  from pickle import PicklingError
  from nose_utils import raises
  from test_utils import get_dali_extra_path, restrict_python_version
label_desc: Use image node_id 6 for calling a global function with example usage: standard_global_callback(sample_info) and returns: np