code: def gradients_image():
      with Image.open("Tests/images/radial_gradients.png") as im:
          im.load()
      try:
          yield im
      finally:
          im.close()
  
imports: from itertools import permutations
  import pytest
  from PIL import Image
  from .helper import assert_image_equal, assert_image_equal_tofile, assert_image_similar, hopper
label_desc: Use image node_id 1 for calling a global function with example usage: gradients_image() without return types