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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:
 def gevent_start(self):
 """ Helper method to start the node for gevent-based applications. """

        import gevent
        import gevent.select
        self._poller_greenlet = gevent.spawn(self.poll)
        self._select = gevent.select.select
        self.heartbeat()
        self.update()