code: def test_caffe2_reader_alias():
      for label_type in [0, 4]:
          yield check_caffe2, label_type
  
imports: from nvidia.dali import Pipeline, pipeline_def
  import nvidia.dali.ops
  import nvidia.dali.fn
  import nvidia.dali.types
  from numpy.testing import assert_array_equal
  import os
  from test_utils import compare_pipelines
  from test_utils import get_dali_extra_path
label_desc: Use image node_id 8 for calling a global function with example usage: test_caffe2_reader_alias() without return types