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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:
 async def await_reply(self, correlation_id, timeout=None):
 """Wait for a reply to a given correlation id. If a timeout is provided, it will raise a asyncio.TimeoutError. """

        try:
            result = await asyncio.wait_for(
                self._futures[correlation_id], timeout=timeout)

            return result
        finally:
            del self._futures[correlation_id]