code: def test_cupy_kernel_gray_scale():
      setup_cupy()
      cupy_case(cupy_kernel_gray_scale, synchronize=False)
  
imports: import numpy
  import nvidia.dali.ops
  import nvidia.dali.types
  import os
  import random
  from functools import partial
  from nvidia.dali.pipeline import Pipeline
  from nvidia.dali import fn, pipeline_def
  from nvidia.dali.python_function_plugin import current_dali_stream
label_desc: Use image node_id 32 for calling a global function with example usage: test_cupy_kernel_gray_scale() without return types