code: def test_kprotoypes_not_stuck_initialization(self):
      init_problem = np.array(
          [
              [0, "Regular"],
              [0, "Regular"],
              [0, "Regular"],
              [0, np.NaN],
              [-0.5, "Regular"],
              [-0.5, "Regular"],
              [0, np.NaN],
              [0, "Regular"],
              [0, "Regular"],
              [0, "Slim"],
              [0, "Regular"],
              [0, "Regular"],
              [0.5, "Regular"],
              [-0.5, "Regular"],
              [0.5, "Regular"],
              [0.5, "Slim"],
              [0, "Regular"],
              [0.5, "Regular"],
              [0, "Regular"],
              [-0.5, "Regular"],
              [0, np.NaN],
              [0, np.NaN],
              [0, "Regular"],
              [0, "Regular"],
              [0, "Regular"],
          ]
      )
      kproto_cao = kprototypes.KPrototypes(
          n_clusters=6, init="Cao", verbose=2, random_state=42
      )
      kproto_cao = kproto_cao.fit(init_problem, categorical=[1])
      self.assertTrue(hasattr(kproto_cao, "cluster_centroids_"))
  
imports: import pickle
  import unittest
  import numpy
  import pandas
  from kmodes import kprototypes
  from kmodes.tests.test_kmodes import assert_cluster_splits_equal
  from kmodes.util.dissim import ng_dissim
label_desc: Use image node_id 14 for calling the TestKProtoTypes obj's underlying member method code with example usage: obj.test_kprotoypes_not_stuck_initialization() without return types