python 生产者消费者模型

import queue
import threading

q = queue.Queue(10)
def product(i):
    print('put:'+ str(i))
    q.put(i)

def customer(i):
    msg = q.get()
    print(msg)

for i in range(12):
    t = threading.Thread(target=product,args=(i,))
    t.start()

for i in range(10):
    t = threading.Thread(target=customer,args=(i,))
    t.start()