code: def test_apng_dispose_op_background_p_mode():
      with Image.open(
          "Tests/images/apng/dispose_op_background_p_mode.png"
      ) as im:
          im.seek(1)
          im.load()
          assert im.size == (128, 64)
  
imports: import pytest
  from PIL import Image, ImageSequence, PngImagePlugin
label_desc: Use image node_id 6 for calling a global function with example usage: test_apng_dispose_op_background_p_mode() without return types