Method closed

Lib/test/test_io.py:4219–4224

(self)

        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)