code: def test_write_read_equal(self):
      self.writer.write_bif("test_bif.bif")
      reader = BIFReader("test_bif.bif")
      read_model = reader.get_model(state_name_type=int)
      self.assertEqual(
          sorted(self.model.nodes()), sorted(read_model.nodes())
      )
      self.assertEqual(
          sorted(self.model.edges()), sorted(read_model.edges())
      )
      for var in self.model.nodes():
          self.assertEqual(
              self.model.get_cpds(var), read_model.get_cpds(var)
          )
      os.remove("test_bif.bif")
  
imports: import os
  import unittest
  import networkx
  import numpy
  import numpy.testing
  from pgmpy import config
  from pgmpy.factors.discrete import TabularCPD
  from pgmpy.models import BayesianNetwork
  from pgmpy.readwrite import BIFReader, BIFWriter
label_desc: Use image node_id 3 for calling the TestBIFWriter obj's underlying member method code with example usage: obj.test_write_read_equal() without return types