#队列 先进先出

 #IPC

 import time

 from multiprocessing import Queue

 q = Queue(5)

 q.put(1)

 q.put(2)

 q.put(3)

 q.put(4)

 q.put(5)

 print(q.full()) #队列是否满了

 print(q.get())

 print(q.get())

 print(q.get())

 print(q.get())

 print(q.get())

 print(q.empty())    #队列是否为空

 #while True这个行为非常地耗内存

 while True:

     try:

         q.get_nowait()

     except:

         print('队列已空')

         time.sleep(1)

 from multiprocessing import Queue,Process

 def produce(q):

     q.put('hello')

 def consume(q):

     print(q.get())

 if __name__ == '__main__':

     q = Queue()

     p = Process(target=produce,args=(q,))

     p.start()

     c = Process(target=consume, args=(q,))

     c.start()