code: def test_not_contains():
      not_contains = neurovault.NotContains("ab")
  
      assert not_contains is not None
      assert not_contains == "a_b"
      assert not_contains == "bcd"
      assert not_contains != "_abcd"
      assert not_contains != "_abcd"
      assert str(not_contains) == "NotContains('ab',)"
  
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 22 for calling a global function with example usage: test_not_contains() without return types