code: def test_assert_frame_not_equal() -> None:
      df = pl.DataFrame({"a": [1, 2]})
      with pytest.raises(AssertionError, match="frames are equal"):
          assert_frame_not_equal(df, df)
  
file_path: polars/py-polars/tests/unit/testing/test_assert_frame_equal.py
imports: from __future__ import annotations
  import math
  from typing import Any
  import pytest
  import polars
  from polars.exceptions import InvalidAssert
  from polars.testing import assert_frame_equal, assert_frame_not_equal
label_desc: Use image node_id 13 for calling a global function with example usage: test_assert_frame_not_equal() without return types