def test_loadTwice(self):
        """
        If {load()} can be called on a loader twice the result should be the
        same.
        """
        loader = self.loaderFactory()
        tags1 = loader.load()
        tags2 = loader.load()
        self.assertEqual(tags1, tags2)

        If {load()} can be called on a loader twice the result should be the
        same.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/web/test/test_template.py