Something

import persistenceimport emencia.ecsdb.ecsdb as dbclass PayementBaseTest(unittest.TestCase):    def setUp(self):        def fakeGetBaseForMapping():            return 'sqlite:///memory'        self.originalGetSQLUri = db.getSQLUri        db.getSQLUri = fakeGetBaseForMapping        reload(persistence)    def tearDown(self):        db.getSQLUri = self.originalGetSQLUri        del self.originalGetBaseForMapping