code: def testWalktrap(self):
      g = Graph.Full(5) + Graph.Full(5) + Graph.Full(5)
      g += [(0, 5), (5, 10), (10, 0)]
      cl = g.community_walktrap().as_clustering()
      self.assertMembershipsEqual(
          cl, [0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2]
      )
      cl = g.community_walktrap(steps=3).as_clustering()
      self.assertMembershipsEqual(
          cl, [0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2]
      )
  
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 11 for calling the CommunityTests obj's underlying member method code with example usage: obj.testWalktrap() without return types