environment/lib/python2.7/site-packages/IPython/parallel/controller/heartmonitor.py
def add_new_heart_handler(self, handler):
        """add a new handler for new hearts"""
        self.log.debug("heartbeat::new_heart_handler: %s", handler)
        self._new_handlers.add(handler)
def add_new_heart_handler(self, handler):
        """add a new handler for new hearts"""
        self.log.debug("heartbeat::new_heart_handler: %s", handler)
        self._new_handlers.add(handler)
add a new handler for new hearts