def start_data_fetch(self):
self.stop_data_fetch()<EOL>self._data_fetcher = _ViewDataFetcher(self, self._tuple_fn)<EOL>t = threading.Thread(target=self._data_fetcher)<EOL>t.start()<EOL>return self._data_fetcher.items<EOL>
Starts a thread that fetches data from the Streams view server.

        Each item in the returned `Queue` represents a single tuple
        on the stream the view is attached to.

        Returns:
            queue.Queue: Queue containing view data.

        .. note:: This is a queue of the tuples coverted to Python
            objects, it is not a queue of :py:class:`ViewItem` objects.