test_sys.py 文件源码

def current_frames_without_threads(self):
        # Not much happens here:  there is only one thread, with artificial
        # "thread id" 0.
        d = sys._current_frames()
        self.assertEqual(len(d), 1)
        self.assertIn(0, d)
        self.assertTrue(d[0] is sys._getframe())