Python threading.Timer类代码示例

    def test_sqs_longpoll(self):
        c = SQSConnection()
        queue_name = "test_sqs_longpoll_%s" % int(time.time())
        queue = c.create_queue(queue_name)
        self.addCleanup(c.delete_queue, queue, True)
        messages = []

        # The basic idea is to spawn a timer thread that will put something
        # on the queue in 5 seconds and verify that our long polling client
        # sees the message after waiting for approximately that long.
        def send_message():
            messages.append(queue.write(queue.new_message("this is a test message")))

        t = Timer(5.0, send_message)
        t.start()
        self.addCleanup(t.join)

        start = time.time()
        response = queue.read(wait_time_seconds=10)
        end = time.time()

        t.join()
        self.assertEqual(response.id, messages[0].id)
        self.assertEqual(response.get_body(), messages[0].get_body())
        # The timer thread should send the message in 5 seconds, so
        # we're giving +- .5 seconds for the total time the queue
        # was blocked on the read call.
        self.assertTrue(4.5 <= (end - start) <= 5.5)

def run(data, d=None):
	global timer
	print(data)

	if data == "ring":
		if int(d) == 1:
			if timer:
				timer.cancel()

			timer = Timer(60, genugdavon)
			timer.start()

			check = Thread(target=check_locks)
			check.start()

			putfile('/sys/class/gpio/gpio11/value', '0')

			playsound("/root/ring-bb.wav")
		else:
			playsound("/root/ring-fis.wav")
	

	if data == "open":
#		if not locked_oben:
		playsound("/root/open.wav")
	
	if data == "summ":
		if timer:
			timer.cancel()

#		if not locked_oben:
		putfile('/sys/class/gpio/gpio11/value', '1')
		playsound("/root/summ.wav")

class Countdown(object):
    """
    Countdown timer starts immediatly on init from `start_value` and counts down
    to zero, then counts up with negated time. Only displays minutes and
    seconds. No pause or reset available. Each "tick" of the clock is passed to
    the callback function as a string. """
    
    def __init__(self, start_value, callback):
        self._finished = False
        self.start_value = start_value
        self.callback = callback
        self.start_time = now()
        self._update()

    def _update(self):
        self._set_time(now() - self.start_time)
        if not self._finished:
            self._timer = Timer(1, self._update)
            self._timer.start()

    def _set_time(self, value):
        neg = '' 
        if self.start_value > value:
            value = self.start_value - value
        elif self.start_value < value:
            value = value - self.start_value
            neg = '-'
        else:
            value = 0
        mm, ss = divmod(value, 60)
        self.callback("{}{:02d}:{:02d}".format(neg, mm, ss))

    def stop(self):
        self._timer.cancel()
        self._finished = True

class InfiniteTimer():
    """A Timer class that does not stop, unless you want it to."""

    def __init__(self, seconds, target):
        self._should_continue = False
        self.is_running = False
        self.seconds = seconds
        self.target = target
        self.thread = None

    def _handle_target(self):
        self.is_running = True
        self.target()
        self.is_running = False
        self._start_timer()

    def _start_timer(self):
        if self._should_continue:  # Code could have been running when cancel was called.
            self.thread = Timer(self.seconds, self._handle_target)
            self.thread.start()

    def start(self):
        if not self._should_continue and not self.is_running:
            self._should_continue = True
            self._start_timer()
        else:
            print("Timer already started or running, please wait if you're restarting.")

    def cancel(self):
        if self.thread is not None:
            # Just in case thread is running and cancel fails.
            self._should_continue = False
            self.thread.cancel()
        else:
            print("Timer never started or failed to initialize.")

def run(dir, main="tmp"):
    try:
        ##print("DEBUG:", [
        ## config.JAVA_CMD,
        ##    "-Djava.security.manager",
        ##    "-Djava.security.policy=whiley.policy",
        ##    "-cp",config.WYJC_JAR + ":" + dir,
        ##    main
        ##    ])
        # run the JVM
        proc = subprocess.Popen([
                                    config.JAVA_CMD,
                                    "-Djava.security.manager",
                                    "-Djava.security.policy=whiley.policy",
                                    "-cp", config.WYJC_JAR + ":" + dir,
                                    main
                                ], stdout=subprocess.PIPE, stderr=subprocess.STDOUT, shell=False)
        # Configure Timeout
        kill_proc = lambda p: p.kill()
        timer = Timer(20, kill_proc, [proc])
        timer.start()
        # Run process        
        (out, err) = proc.communicate()
        timer.cancel()
        # Check what happened
        if proc.returncode >= 0:
            return out
        else:
            return "Timeout: Your program ran for too long!"
    except Exception as ex:
        # error, so return that
        return "Run Error: " + str(ex)

class Handler():
    """Queues filesystem events for broadcast"""

    def __init__(self):
        """Create an event handler"""
        ## Timer used to prevent notification floods
        self._timer = None
        ## The files that have changed since the last broadcast
        self._files = set()
        ## Lock to protect files and timer from threading issues
        self._lock = Lock()

    def broadcast(self):
        """Broadcasts a list of all files touched since last broadcast"""
        with self._lock:
            cola.notifier().broadcast(signals.update_status, self._files)
            self._files = set()
            self._timer = None

    def handle(self, path):
        """Queues up filesystem events for broadcast"""
        with self._lock:
            self._files.add(path)
            if self._timer is None:
                self._timer = Timer(0.333, self.broadcast)
                self._timer.start()

    def setupClient(self, topic, msg_type, wait_duration=10):
        """
        Tries to set up an action client for calling it later.
        
        @type topic: string
        @param topic: The topic of the action to call.
        
        @type msg_type: msg type
        @param msg_type: The type of messages of this action client.
        
        @type wait_duration: int
        @param wait_duration: Defines how long to wait for the given client if it is not available right now.
        """
        if topic not in ProxyActionClient._clients:
            client = actionlib.SimpleActionClient(topic, msg_type)
            t = Timer(1, self._print_wait_warning, [topic])
            t.start()
            available = client.wait_for_server(rospy.Duration.from_sec(wait_duration))
            warning_sent = False
            try:
                t.cancel()
            except Exception as ve:
                # already printed the warning
                warning_sent = True

            if not available:
                Logger.logerr("Action client %s timed out!" % topic)
            else:
                ProxyActionClient._clients[topic] = client
                if warning_sent:
                    Logger.loginfo("Finally found action client %s..." % (topic))

 def view_image(self, im, auto_close=True):
     # use a manager to open so will auto close on quit
     self.open_view(im)
     if auto_close:
         minutes = 2
         t = Timer(60 * minutes, im.close_ui)
         t.start()

  def run(self, app, type):
    # Invoke wren and run the test.
    test_arg = self.path
    if type == "api test":
      # Just pass the suite name to API tests.
      test_arg = basename(splitext(test_arg)[0])

    proc = Popen([app, test_arg], stdin=PIPE, stdout=PIPE, stderr=PIPE)

    # If a test takes longer than two seconds, kill it.
    #
    # This is mainly useful for running the tests while stress testing the GC,
    # which can make a few pathological tests much slower.
    timed_out = [False]
    def kill_process(p):
      timed_out[0] = True
      p.kill()

    timer = Timer(2, kill_process, [proc])

    try:
      timer.start()
      out, err = proc.communicate(self.input_bytes)

      if timed_out[0]:
        self.fail("Timed out.")
      else:
        self.validate(type == "example", proc.returncode, out, err)
    finally:
      timer.cancel()

class PeriodicTimer(object):

    def __init__(self, frequency=60, *args, **kwargs):
        self.is_stopped = Event()
        self.is_stopped.clear()

        self.interval = frequency
        self._timer = Timer(self.frequency, self._check_for_event, ())
        self._timer.daemon = True

    @property
    def interval(self):
        return self.frequency

    @interval.setter
    def interval(self, frequency):
        self.frequency = frequency
        self.stop()
        try:
            if self._timer:
                self._timer.cancel()
                del(self._timer)
        except AttributeError, ex:
            pass
        self._timer = Timer(self.frequency, self._check_for_event, ())
        return self.frequency

class TimerMixIn(object):
  
    def __init__(self, *argl, **argd):
        super(TimerMixIn,self).__init__(*argl,**argd)
        self.timer = None
        self.timerSuccess = True
          
    def startTimer(self, secs):
        if self.timer is not None:
            self.cancelTimer()
        self.timer = Timer(secs, self.__handleTimerDone)
        self.timerSuccess = False
        self.timer.start()
  
    def cancelTimer(self):
        if self.timer is not None and self.timer:
             self.timer.cancel()
             self.timer = None
             self.timerSuccess = False
  
    def timerRunning(self):
        return self.timer is not None
        
    def timerWasCancelled(self):
        return not self.timerSuccess
  
    def __handleTimerDone(self):
        self.scheduler.wakeThread(self)
        self.timer = None
        self.timerSuccess = True

def dataout():
    global timer1
    timer1 = Timer(1.0 / data_freq, dataout)
    timer1.start()
    lock.acquire()
    print "{:+.3f}".format(data.popleft())
    lock.release()

 def create_session(self):
     log.info("Enabling for MAC %s" % (self.mac))
     sys_cmd = "iptables -I internet 1 -t mangle -m mac --mac-source %s -j RETURN" % self.mac
     log.info(sys_cmd)
     log.info(os.popen(sys_cmd).read())
     callback = Timer(self.length, self.destroy_session)
     callback.start()

 def defer(self, t, run_on_cancel, func, *args):
     event = Timer(t, self.run_action, kwargs={'func': func, 'args': args})
     event.name = '%s deferring %s' % (event.name, func.__name__)
     event.start()
     with worker_lock:
         self.events[event.ident] = Event(event, run_on_cancel)
     return event.ident

    def _connected(self, link_uri):
        """ This callback is called form the Crazyflie API when a Crazyflie
        has been connected and the TOCs have been downloaded."""
        print('Connected to %s' % link_uri)

        # The definition of the logconfig can be made before connecting
        self._lg_stab = LogConfig(name='Stabilizer', period_in_ms=10)
        self._lg_stab.add_variable('stabilizer.roll', 'float')
        self._lg_stab.add_variable('stabilizer.pitch', 'float')
        self._lg_stab.add_variable('stabilizer.yaw', 'float')

        # Adding the configuration cannot be done until a Crazyflie is
        # connected, since we need to check that the variables we
        # would like to log are in the TOC.
        try:
            self._cf.log.add_config(self._lg_stab)
            # This callback will receive the data
            self._lg_stab.data_received_cb.add_callback(self._stab_log_data)
            # This callback will be called on errors
            self._lg_stab.error_cb.add_callback(self._stab_log_error)
            # Start the logging
            self._lg_stab.start()
        except KeyError as e:
            print('Could not start log configuration,'
                  '{} not found in TOC'.format(str(e)))
        except AttributeError:
            print('Could not add Stabilizer log config, bad configuration.')

        # Start a timer to disconnect in 10s
        t = Timer(5, self._cf.close_link)
        t.start()