code: def test_palette_434(tmp_path):
      # see https://github.com/python-pillow/Pillow/issues/434
  
      def roundtrip(im, *args, **kwargs):
          out = str(tmp_path / "temp.gif")
          im.copy().save(out, *args, **kwargs)
          reloaded = Image.open(out)
  
          return reloaded
  
      orig = "Tests/images/test.colors.gif"
      with Image.open(orig) as im:
          with roundtrip(im) as reloaded:
              assert_image_similar(im, reloaded, 1)
          with roundtrip(im, optimize=True) as reloaded:
              assert_image_similar(im, reloaded, 1)
  
          im = im.convert("RGB")
          # check automatic P conversion
          with roundtrip(im) as reloaded:
              reloaded = reloaded.convert("RGB")
              assert_image_equal(im, reloaded)
  
imports: from io import BytesIO
  import pytest
  from PIL import GifImagePlugin, Image, ImageDraw, ImagePalette, features
  from .helper import assert_image_equal, assert_image_equal_tofile, assert_image_similar, hopper, is_pypy, netpbm_available
label_desc: Use image node_id 15 for calling a global function with example usage: test_palette_434(tmp_path) and returns: reloaded