code: def test_ne(self):
      pser, psser = self.pser, self.psser
      self.assert_eq(pser != pser, psser != psser)
  
imports: import pandas
  from pandas.api.types import CategoricalDtype
  import pyspark.pandas
  from pyspark.testing.pandasutils import PandasOnSparkTestCase
  from pyspark.pandas.tests.data_type_ops.testing_utils import OpsTestBase
label_desc: Use image node_id 24 for calling the NullOpsTestsMixin obj's underlying member method code with example usage: obj.test_ne() without return types