python 中的队列

queue 可以保证每个线程取和存数据的安全性，因为它里面实现了锁机制

#-*-coding:utf-8-*- 
#__author:martin
#date:2017/10/23
import  threading
import  random
import  time
class Producer(threading.Thread):
    def run(self):
       global  L
       while True:
            val = random.randint(0,100)
            print('生产者',self.name,'append '+str(val),L)
            if lock_con.acquire():
                L.append(val)
                lock_con.notify()
                lock_con.release()
            time.sleep(3)
class Consumer(threading.Thread):
    def run(self):
       global  L
       while True:
            if lock_con.acquire():
                  if len(L) == 0 :
                    lock_con.wait()
                  print('消费者', self.name, 'delete ' + str(L[0]), L)
                  del L[0]
                  lock_con.release()
            time.sleep(1)

if __name__ == '__main__':
    L = []
    lock_con = threading.Condition()
    threads = []
    for i  in range(5):
        threads.append(Producer())
    threads.append(Consumer())
    for t in threads:
        t.start()
    for j in threads:
        j.join()
    print('======================')