code: def test_factorset_divide(self):
      phi1 = DiscreteFactor(["x1", "x2", "x3"], [2, 3, 2], range(1, 13))
      phi2 = DiscreteFactor(["x3", "x4", "x1"], [2, 2, 2], range(1, 9))
      factor_set1 = FactorSet(phi1, phi2)
      phi3 = DiscreteFactor(["x5", "x6", "x7"], [2, 2, 2], range(1, 9))
      phi4 = DiscreteFactor(["x5", "x7", "x8"], [2, 2, 2], range(1, 9))
      factor_set2 = FactorSet(phi3, phi4)
      factor_set3 = factor_set2.divide(factor_set1, inplace=False)
      self.assertEqual(
          {
              phi3,
              phi4,
              phi1.identity_factor() / phi1,
              phi2.identity_factor() / phi2,
          },
          factor_set3.factors,
      )
  
file_path: pgmpy/pgmpy/tests/test_factors/test_FactorSet.py
imports: import unittest
  from pgmpy.factors import FactorSet
  from pgmpy.factors.discrete import DiscreteFactor
label_desc: Use image node_id 5 for calling the TestFactorSet obj's underlying member method code with example usage: obj.test_factorset_divide() without return types