Method write_to_fd

tornado/iostream.py:1591–1597

(self, data: memoryview)

        self._fio.close()

    def write_to_fd(self, data: memoryview) -> int:
        try:
            return os.write(self.fd, data)  # type: ignore
        finally:
            # Avoid keeping to data, which can be a memoryview.
            # See https://github.com/tornadoweb/tornado/pull/2008
            del data

    def read_from_fd(self, buf: Union[bytearray, memoryview]) -> Optional[int]:
        try: