code: def _testimpl_numpy_reader_roi_empty_range(
      testcase_name,
      file_root,
      batch_size,
      ndim,
      dtype,
      device,
      fortran_order,
      file_filter="*.npy",
  ):
      # testcase name used for visibility in the output logs
      @pipeline_def(batch_size=batch_size, device_id=0, num_threads=8)
      def pipe():
          data0 = fn.readers.numpy(
              device=device,
              file_root=file_root,
              file_filter=file_filter,
              shard_id=0,
              num_shards=1,
              cache_header_information=False,
              seed=1234,
          )
          data1 = fn.readers.numpy(
              device=device,
              file_root=file_root,
              file_filter=file_filter,
              roi_start=[1],
              roi_end=[1],
              roi_axes=[1],
              shard_id=0,
              num_shards=1,
              cache_header_information=False,
              seed=1234,
          )
          return data0, data1
  
      p = pipe()
      try:
          p.build()
          data0, data1 = p.run()
          for i in range(batch_size):
              arr = to_array(data0[i])
              roi_arr = to_array(data1[i])
              for d in range(len(arr.shape)):
                  if d == 1:
                      assert roi_arr.shape[d] == 0
                  else:
                      assert roi_arr.shape[d] == arr.shape[d]
      finally:
          del p
  
imports: from nvidia.dali import Pipeline, pipeline_def
  import nvidia.dali.fn
  import nvidia.dali.types
  import nvidia.dali.backend
  import numpy
  from numpy.testing import assert_array_equal
  import os
  import platform
  import random
  import tempfile
  from nose_utils import assert_raises
  from nose import SkipTest
  from nose2.tools import params, cartesian_params
  from test_utils import compare_pipelines, to_array
label_desc: Use image node_id 23 for calling a global function with example usage: _testimpl_numpy_reader_roi_empty_range(testcase_name, file_root, batch_size, ndim, dtype, device, fortran_order, file_filter) and returns: data0,  data1