code: def test_add_single_cpds(self):
      self.network.add_edges_from(
          [(("D", 0), ("G", 0)), (("I", 0), ("G", 0))]
      )
      self.network.add_cpds(self.grade_cpd)
      self.assertListEqual(self.network.get_cpds(), [self.grade_cpd])
  
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 8 for calling the TestDynamicBayesianNetworkMethods obj's underlying member method code with example usage: obj.test_add_single_cpds() without return types