code: def test_not_equal():
      not_equal = neurovault.NotEqual("a")
  
      assert not_equal == "b"
      assert not_equal == 1
      assert not_equal != "a"
      assert "a" != not_equal
      assert str(not_equal) == "NotEqual('a')"
  
imports: import hashlib
  import json
  import os
  import re
  import stat
  from urllib import parse
  import numpy
  import pandas
  import pytest
  import requests
  from nilearn._utils.data_gen import generate_fake_fmri
  from nilearn.conftest import _rng
  from nilearn.datasets import neurovault
  from nilearn.image import load_img
label_desc: Use image node_id 17 for calling a global function with example usage: test_not_equal() without return types