code: def testVisualize2DAnd3DClusters(self):
      sample_2d = read_sample(SIMPLE_SAMPLES.SAMPLE_SIMPLE1)
      sample_3d = read_sample(FCPS_SAMPLES.SAMPLE_HEPTA)
  
      visualizer = cluster_visualizer(2, 2)
      visualizer.append_clusters([sample_2d], None, 0, markersize=5)
      visualizer.append_clusters([sample_3d], None, 1, markersize=30)
      figure = visualizer.show()
      visualizer.close(figure)
  
imports: import unittest
  import matplotlib
  import matplotlib.pyplot
  import numpy
  import random
  from pyclustering.samples.definitions import SIMPLE_SAMPLES, FCPS_SAMPLES
  from pyclustering.utils import read_sample
  from pyclustering.cluster import cluster_visualizer
  from pyclustering.cluster.dbscan import dbscan
  from pyclustering.cluster.cure import cure
label_desc: Use image node_id 13 for calling the Test obj's underlying member method code with example usage: obj.testVisualize2DAnd3DClusters() without return types