code: def testCompareRand(self):
      expected = [1, 2 / 3.0, 0, 0.590909]
      self._testMethod("rand", expected)
  
imports: import math
  import random
  import unittest
  from igraph import Clustering, CohesiveBlocks, Cover, Graph, Histogram, InternalError, UniqueIdGenerator, VertexClustering, compare_communities, split_join_distance, set_random_number_generator
label_desc: Use image node_id 6 for calling the ComparisonTests obj's underlying member method code with example usage: obj.testCompareRand() without return types