code: def testSomClusterAllocationSampleSimple1(self):
      self.templateLengthSomCluster(
          SIMPLE_SAMPLES.SAMPLE_SIMPLE1, [3, 3], 1.0, 0.99
      )
  
imports: import unittest
  import matplotlib
  from pyclustering.cluster.syncsom import syncsom
  from pyclustering.utils import read_sample
  from pyclustering.samples.definitions import SIMPLE_SAMPLES
label_desc: Use image node_id 2 for calling the SyncsomUnitTest obj's underlying member method code with example usage: obj.testSomClusterAllocationSampleSimple1() without return types