code: def test_pickle_fitted(self):
      kmodes_huang = KModes(
          n_clusters=4,
          n_init=2,
          init="Huang",
          verbose=2,
          random_state=42,
      )
      model = kmodes_huang.fit(SOYBEAN)
      serialized = pickle.dumps(model)
      self.assertTrue(
          isinstance(pickle.loads(serialized), model.__class__)
      )
  
imports: import pickle
  import unittest
  import numpy
  import pandas
  from kmodes.kmodes import KModes
  from kmodes.util.dissim import ng_dissim, jaccard_dissim_binary, jaccard_dissim_label
label_desc: Use image node_id 2 for calling the TestKModes obj's underlying member method code with example usage: obj.test_pickle_fitted() without return types