def start(self):
        with self._state_change:
            if self._running:
                return

            self._running = True

            # Spawn our worker greenlets, we have
            # - A callback worker for watch events to be called
            for queue in (self.callback_queue,):
                w = self._create_greenlet_worker(queue)
                self._workers.append(w)
            python2atexit.register(self.stop)
Start the greenlet workers.
dataset/ETHPy150Open python-zk/kazoo/kazoo/handlers/gevent.py/SequentialGeventHandler.start