docs: def divide(self, factorset, inplace=True):
          r"""
          Returns a new factor set instance after division by the factor set
  
          Division of two factor sets :math:`\frac{\vec\phi_1}{\vec\phi_2}` basically translates to union of all the
          factors present in :math:`\vec\phi_2` and :math:`\frac{1}{\phi_i}` of all the factors present in
          :math:`\vec\phi_2`.
  
          Parameters
          ----------
          factorset: FactorSet
              The divisor
  
          inplace: A boolean (Default value True)
              If inplace = True ,then it will modify the FactorSet object, if False then will
              return a new FactorSet object.
  
          Returns
          --------
          If inplace = False, will return a new FactorSet Object which is division of
          given factors.
  
          Examples
          --------
          >>> from pgmpy.factors import FactorSet
          >>> from pgmpy.factors.discrete import DiscreteFactor
          >>> phi1 = DiscreteFactor(['x1', 'x2', 'x3'], [2, 3, 2], range(12))
          >>> phi2 = DiscreteFactor(['x3', 'x4', 'x1'], [2, 2, 2], range(8))
          >>> factor_set1 = FactorSet(phi1, phi2)
          >>> phi3 = DiscreteFactor(['x5', 'x6', 'x7'], [2, 2, 2], range(8))
          >>> phi4 = DiscreteFactor(['x5', 'x7', 'x8'], [2, 2, 2], range(8))
          >>> factor_set2 = FactorSet(phi3, phi4)
          >>> factor_set3 = factor_set2.divide(factor_set1)
          >>> print(factor_set3)
          set([<DiscreteFactor representing phi(x3:2, x4:2, x1:2) at 0x7f8e32b5ba10>,
               <DiscreteFactor representing phi(x5:2, x6:2, x7:2) at 0x7f8e32b5b650>,
               <DiscreteFactor representing phi(x1:2, x2:3, x3:2) at 0x7f8e32b5b050>,
               <DiscreteFactor representing phi(x5:2, x7:2, x8:2) at 0x7f8e32b5b8d0>])
          """
          factor_set = self if inplace else self.copy()
          factor_set1 = factorset.copy()
  
          factor_set.add_factors(*[phi.identity_factor() / phi for phi in factor_set1.factors])
  
          if not inplace:
              return factor_set