code: def test_add_edge_with_different_number_timeslice(self):
      self.network.add_edge(("a", 2), ("b", 2))
      self.assertListEqual(
          sorted(self.network.edges()),
          [(("a", 0), ("b", 0)), (("a", 1), ("b", 1))],
      )
  
imports: import unittest
  import numpy
  import numpy.testing
  import pandas
  import pgmpy.tests.help_functions
  from pgmpy.factors.discrete import TabularCPD
  from pgmpy.inference import CausalInference, DBNInference, VariableElimination
  from pgmpy.models import BayesianNetwork
  from pgmpy.models import DynamicBayesianNetwork
label_desc: Use image node_id 5 for calling the TestDynamicBayesianNetworkCreation obj's underlying member method code with example usage: obj.test_add_edge_with_different_number_timeslice() without return types