code: def test_pil(self):
      tempdir = tempfile.mkdtemp()
      test_image = np.random.randint(0, 256, size=[128, 256])
      filename = os.path.join(tempdir, "test_image.png")
      PILImage.fromarray(test_image.astype("uint8")).save(filename)
  
      loader = LoadImage(
          PILReader(converter=lambda image: image.convert("LA"))
      )
      _ = loader(filename)
  
imports: from __future__ import annotations
  import os
  import tempfile
  import unittest
  from pathlib import Path
  from typing import TYPE_CHECKING
  from unittest.case import skipUnless
  import numpy
  from parameterized import parameterized
  from monai.data import DataLoader, Dataset, create_test_image_2d
  from monai.data.image_reader import PILReader
  from monai.transforms import LoadImage, LoadImaged
  from monai.transforms.io.array import switch_endianness
  from monai.utils.enums import PostFix
  from monai.utils.module import optional_import
label_desc: Use image node_id 4 for calling the TestNiftiEndianness obj's underlying member method code with example usage: obj.test_pil() without return types