code: def test_gamma_estimation(self):
      data = np.hstack(
          [
              np.array(
                  [
                      [0.0],
                      [0.0],
                      [0.0],
                      [1.0],
                      [1.0],
                      [1.0],
                      [2.0],
                      [2.0],
                      [2.0],
                      [3.0],
                      [4.0],
                      [5.0],
                  ]
              ),
              STOCKS,
          ]
      )
      kproto = kprototypes.KPrototypes(
          n_clusters=4, init="Cao", random_state=42
      )
      kproto_fitted = kproto.fit(data, categorical=[2, 3])
      self.assertEqual(kproto_fitted.gamma, 35.33525036439546)
  
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 30 for calling the TestKProtoTypes obj's underlying member method code with example usage: obj.test_gamma_estimation() without return types