def _start_auto_refresh_thread(self):
def run():<EOL><INDENT>while True:<EOL><INDENT>time.sleep(self.status_interval)<EOL>self.invalidate()<EOL><DEDENT><DEDENT>t = threading.Thread(target=run)<EOL>t.daemon = True<EOL>t.start()<EOL>
Start the background thread that auto refreshes all clients according to
`self.status_interval`.