code: def setUp(self):
      self.cl = Clustering([0, 0, 0, 1, 1, 2, 1, 1, 4, 4])
  
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 1 for calling the ClusteringTests obj's underlying member method code with example usage: obj.setUp() without return types