Class ReentrantRawIO

Lib/test/test_io/test_textio.py:1550–1557

        wrapper = None
        detached = False
        class ReentrantRawIO(self.RawIOBase):
            @property
            def closed(self):
                nonlocal detached
                if wrapper is not None and not detached:
                    detached = True
                    wrapper.detach()
                return False

        raw = ReentrantRawIO()
        wrapper = self.TextIOWrapper(raw)