code: def test_seek_rewind():
      with Image.open("Tests/images/iss634.gif") as im:
          im.seek(2)
          im.seek(1)
  
          with Image.open("Tests/images/iss634.gif") as expected:
              expected.seek(1)
              assert_image_equal(im, expected)
  
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 20 for calling a global function with example usage: test_seek_rewind() without return types