import queue
from random import randint
from threading import Thread
from threading import Event

class WriteThread(Thread):
    def __init__(self,queue,WEvent,REvent):
        Thread.__init__(self)
        self.queue = queue
        self.REvent = REvent
        self.WEvent = WEvent

    def run(self):
            data = [randint(1,10) for _ in range(0,5)]
            self.queue.put(data)
            print("send Read Event")
            self.REvent.set()  #--> 通知讀線程可以讀了
            self.WEvent.wait() #--> 等待寫事件
            print("recv write Event")
            self.WEvent.clear() #-->清除寫事件，以方便下次讀取

class ReadThread(Thread):
    def __init__(self,queue,WEvent, REvent):
        Thread.__init__(self)
        self.queue = queue
        self.REvent = REvent
        self.WEvent = WEvent
    def run(self):
        while True:
            self.REvent.wait() #--> 等待讀事件
            print("recv Read Event")
            data  = self.queue.get()
            print("read data is {0}".format(data))
            print("Send Write Event")
            self.WEvent.set()  #--> 發(fā)送寫事件
            self.REvent.clear() #--> 清除讀事件，以方便下次讀取

q= queue.Queue()
WEvent = Event()
REvent = Event()
WThread = WriteThread( q, WEvent, REvent)
RThread = ReadThread(q, WEvent, REvent)

WThread.start()
RThread.start()

send Read Event
recv Read Event
read data is [9, 4, 8, 3, 5]
Send Write Event
recv write Event