ef METHOD_NAME(self):
  "test for bug #1604868"
  data = [ (18,13), (15, 12), (17,12), (18,12), (19,12), (16,11), (18, 11),
         (19,10), (0,0), (1, 4), (1,2), (2,3), (4,1), (4,3), (5,2), (6,1)]
  cl = KMeansClustering(data)
  clusters = cl.getclusters(2)
  expected = [[(18,13), (15, 12), (17,12), (18,12), (19,12), (16,11), (18, 11), (19,10)],
         [(0,0), (1, 4), (1,2), (2,3), (4,1), (5,2), (6,1), (4,3)]]
  self.assertEqual( True, compare_list(
        clusters,
        expected ),
        "Elements differ!\n%s\n%s" % (clusters, expected))