code: def assert_not_all_same(items, msg=None):
      assert items.count(items[0]) != len(items), msg
  
imports: import logging
  import os
  import shutil
  import sys
  import sysconfig
  import tempfile
  from io import BytesIO
  import pytest
  from packaging.version import parse
  from PIL import Image, ImageMath, features
label_desc: Use image node_id 9 for calling a global function with example usage: assert_not_all_same(items, msg) without return types