Class StdoutGuard

Lib/test/test_descr.py:4564–4567

    def test_file_fault(self):
        # Testing sys.stdout is changed in getattr...
        class StdoutGuard:
            def __getattr__(self, attr):
                sys.stdout = sys.__stdout__
                raise RuntimeError(f"Premature access to sys.stdout.{attr}")

        with redirect_stdout(StdoutGuard()):
            with self.assertRaises(RuntimeError):