def test1(self):
        import vistrails.core.system
        from vistrails.core.db.locator import XMLFileLocator
        v = XMLFileLocator(vistrails.core.system.vistrails_root_directory() +
                           '/tests/resources/dummy.xml').load()
        p1 = v.getPipeline('final')
        p2 = v.getPipeline('final')
        self.assertEquals(len(p1.modules), len(p2.modules))
        for k in p1.modules.keys():
            if p1.modules[k] is p2.modules[k]:
                self.fail("didn't expect aliases in two different pipelines")
Sum all of the values of a metric from a WMI class object, excluding
dataset/ETHPy150Open VisTrails/VisTrails/vistrails/core/vistrail/action.py/TestAction.test1--crossover with--dataset/ETHPy150Open serverdensity/sd-agent/checks/system/win32.py/Cpu._average_metric