code: def test_kprotoypes_no_categoricals(self):
      kproto_cao = kprototypes.KPrototypes(
          n_clusters=6, init="Cao", verbose=2, random_state=42
      )
      with self.assertRaises(NotImplementedError):
          kproto_cao.fit(STOCKS, categorical=[])
  
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 18 for calling the TestKProtoTypes obj's underlying member method code with example usage: obj.test_kprotoypes_no_categoricals() without return types