@coroutine_annotation
    def open(self, callback=None):
        return self._framework.future_or_callback(self._ensure_file(),
                                                  callback,
                                                  self.get_io_loop(),
                                                  self)
Retrieve this file's attributes from the server.
dataset/ETHPy150Open mongodb/motor/motor/motor_gridfs.py/AgnosticGridOut.open