def start(self):
        """Start all services."""
        atexit.register(self._clean_exit)

        self.state = states.STARTING
        self.log('Bus STARTING')
        try:
            self.publish('start')
            self.state = states.STARTED
            self.log('Bus STARTED')
        except (__HOLE__, SystemExit):
            raise
        except:
            self.log("Shutting down due to error in start listener:",
                     level=40, traceback=True)
            e_info = sys.exc_info()[1]
            try:
                self.exit()
            except:
                # Any stop/exit errors will be logged inside publish().
                pass
            # Re-raise the original error
            raise e_info
dataset/ETHPy150Open clips/pattern/pattern/server/cherrypy/cherrypy/process/wspbus.py/Bus.start