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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def close(self):
 """in write mode, closing the handle adds the sentinel value into the queue and joins the thread executing the HTTP request. in read mode, this clears out the read response object so there are no references to it, and the resources can be reclaimed. """

        if self._mode.find('w') >= 0:
            self._queue.put(self._sentinel)
            self._thread.join(timeout=self._timeout)
            if self._thread.is_alive():
                raise RemoteFileException("Closing file timed out.")
            response = self._response_queue.get_nowait()
            try:
                response.raise_for_status()
            except Exception as e:
                raise RestApiError(cause=e)
        else:
            self._read_response = None