environment/lib/python2.7/site-packages/IPython/parallel/apps/launcher.py
def interrupt_then_kill(self, delay=2.0):
        """Send INT, wait a delay and then send KILL."""
        try:
            self.signal(SIGINT)
        except Exception:
            self.log.debug("interrupt failed")
            pass
        self.killer  = ioloop.DelayedCallback(lambda : self.signal(SIGKILL), delay*1000, self.loop)
        self.killer.start()
def interrupt_then_kill(self, delay=2.0):
        """Send INT, wait a delay and then send KILL."""
        try:
            self.signal(SIGINT)
        except Exception:
            self.log.debug("interrupt failed")
            pass
        self.killer  = ioloop.DelayedCallback(lambda : self.signal(SIGKILL), delay*1000, self.loop)
        self.killer.start()
Send INT, wait a delay and then send KILL.