code: def test_instance_validation(self):
      clf = self.Clusterer()
      scikitplot.clustering_factory(clf)
  
      not_clf = self.NotClusterer()
      self.assertRaises(
          TypeError, scikitplot.clustering_factory, not_clf
      )
  
imports: from __future__ import absolute_import
  import unittest
  import scikitplot
  import warnings
  import numpy
  from sklearn.datasets import load_iris
  from sklearn.cluster import KMeans
  import matplotlib.pyplot
label_desc: Use image node_id 2 for calling the TestClassifierFactory obj's underlying member method code with example usage: obj.test_instance_validation() without return types