code: def testClusteringSampleSimple01SevenCluster(self):
      self.templateDataClustering(
          SIMPLE_SAMPLES.SAMPLE_SIMPLE1, 7, None
      )
  
imports: import unittest
  import matplotlib
  from pyclustering.cluster.ema import ema, ema_observer, ema_initializer, ema_init_type, ema_visualizer
  from pyclustering.utils import read_sample
  from pyclustering.samples.definitions import SIMPLE_SAMPLES, FCPS_SAMPLES, FAMOUS_SAMPLES
label_desc: Use image node_id 9 for calling the EmaUnitTest obj's underlying member method code with example usage: obj.testClusteringSampleSimple01SevenCluster() without return types