code: def test_cluster_allocation_simple08(self):
      fcm_test_template.cluster_allocation(
          SIMPLE_SAMPLES.SAMPLE_SIMPLE8,
          [[-4.0], [3.1], [6.1], [12.0]],
          2.0,
          [15, 30, 20, 80],
          False,
      )
  
imports: import unittest
  import matplotlib
  from pyclustering.cluster.tests.fcm_templates import fcm_test_template
  from pyclustering.cluster.fcm import fcm
  from pyclustering.samples.definitions import SIMPLE_SAMPLES, FAMOUS_SAMPLES, FCPS_SAMPLES
label_desc: Use image node_id 13 for calling the fcm_unit_tests obj's underlying member method code with example usage: obj.test_cluster_allocation_simple08() without return types