code: def test_incorrect_data(self):
      self.assertRaises(ValueError, syncnet, [], 0.5)
  
imports: import unittest
  import matplotlib
  from pyclustering.nnet import initial_type, conn_represent, solve_type
  from pyclustering.cluster.tests.syncnet_templates import SyncnetTestTemplates
  from pyclustering.cluster.syncnet import syncnet, syncnet_visualizer
  from pyclustering.utils import read_sample
  from numpy import pi
  from pyclustering.samples.definitions import SIMPLE_SAMPLES
label_desc: Use image node_id 32 for calling the SyncnetUnitTest obj's underlying member method code with example usage: obj.test_incorrect_data() without return types