def setUp(self):
        from sas.models.GuinierModel import GuinierModel
        from sas.models.HayterMSAStructure import HayterMSAStructure
        from sas.models.MultiplicationModel import MultiplicationModel

        self.model = GuinierModel()
        self.model2 = HayterMSAStructure()
        self.model3 = MultiplicationModel(self.model, self.model2)  
 def setUp(self):
     from sas.models.GuinierModel import GuinierModel
     self.comp = GuinierModel()