<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def get(self):
 """Gets a single item from the queue and returns it. If the queue is empty, this method will return None. Returns: :class:`contracts.Envelope`. a telemetry envelope object or None if the queue is empty. """

        try:
            item = self._queue.get_nowait()
        except (Empty, PersistEmpty):
            return None

        if self._persistence_path:
            self._queue.task_done()

        return item