def stop(self, graceful=True):
        """\
        Stop workers

        :attr graceful: boolean, If True (the default) workers will be
        killed gracefully  (ie. trying to wait for the current connection)
        """
        self.LISTENERS = []
        sig = signal.SIGTERM
        if not graceful:
            sig = signal.SIGQUIT
        limit = time.time() + self.cfg.graceful_timeout
        # instruct the workers to exit
        self.kill_workers(sig)
        # wait until the graceful timeout
        while self.WORKERS and time.time() < limit:
            time.sleep(0.1)

        self.kill_workers(signal.SIGKILL)
dataset/ETHPy150Open RoseOu/flasky/venv/lib/python2.7/site-packages/gunicorn/arbiter.py/Arbiter.stop/original