code: def test_empty_input(device, use_empty_input):
      @pipeline_def(
          batch_size=1,
          num_threads=1,
          device_id=0 if device == "gpu" else None,
      )
      def make_pipe():
          inp = [] if use_empty_input else [42]
          inp = np.array(inp, dtype="int")
          x = types.Constant(inp, device=device)
          anchor = 0 if use_empty_input else 1
          return fn.slice(x, anchor, 0, axes=[0])
  
      p = make_pipe()
      p.build()
      (o,) = p.run()
      if device == "gpu":
          o = o.as_cpu()
      assert np.array_equal(o[0], [])
  
imports: from nvidia.dali import Pipeline, pipeline_def, ops, fn, types
  import numpy
  import os
  from functools import partial
  from math import floor
  from test_utils import compare_pipelines, get_dali_extra_path, RandomDataIterator, generator_random_axes_for_3d_input, generator_random_data, as_array
  from nose_utils import assert_raises
  from nose2.tools import params
label_desc: Use image node_id 33 for calling a global function with example usage: test_empty_input(device, use_empty_input) and returns: fn