test_faulthandler.py 文件源码

def test_is_enabled(self):
        orig_stderr = sys.stderr
        try:
            # regrtest may replace sys.stderr by io.StringIO object, but
            # faulthandler.enable() requires that sys.stderr has a fileno()
            # method
            sys.stderr = sys.__stderr__

            was_enabled = faulthandler.is_enabled()
            try:
                faulthandler.enable()
                self.assertTrue(faulthandler.is_enabled())
                faulthandler.disable()
                self.assertFalse(faulthandler.is_enabled())
            finally:
                if was_enabled:
                    faulthandler.enable()
                else:
                    faulthandler.disable()
        finally:
            sys.stderr = orig_stderr