python多线程threading.Lock锁用法实例
本文实例讲述了python多线程threading.Lock锁的用法实例，分享给大家供大家参考。具体分析如下：
python的锁可以独立提取出来
复制代码 代码如下:
mutex = threading.Lock()
#锁的使用
#创建锁
mutex = threading.Lock()
#锁定
mutex.acquire([timeout])
#释放
mutex.release()
#锁的使用
#创建锁
mutex = threading.Lock()
#锁定
mutex.acquire([timeout])
#释放
mutex.release()
锁定方法acquire可以有一个超时时间的可选参数timeout。如果设定了timeout，则在超时后通过返回值可以判断是否得到了锁，从而可以进行一些其他的处理。
复制代码 代码如下:
#!/usr/bin/env python
#coding=utf-8
import threading
import time
class MyThread(threading.Thread):
def run(self):
global num
time.sleep(1)
if mutex.acquire(1):
num = num+1
msg = self.name+' set num to '+str(num)
print msg
mutex.release()
num = 0
mutex = threading.Lock()
def test():
for i in range(5):
t = MyThread()
t.start()
if __name__ == '__main__':
test()
Thread-1 set num to 1
Thread-3 set num to 2
Thread-4 set num to 3
Thread-5 set num to 4
Thread-2 set num to 5
#coding=utf-8
import threading
import time
class MyThread(threading.Thread):
def run(self):
global num
time.sleep(1)
if mutex.acquire(1):
num = num+1
msg = self.name+' set num to '+str(num)
print msg
mutex.release()
num = 0
mutex = threading.Lock()
def test():
for i in range(5):
t = MyThread()
t.start()
if __name__ == '__main__':
test()
Thread-1 set num to 1
Thread-3 set num to 2
Thread-4 set num to 3
Thread-5 set num to 4
Thread-2 set num to 5
希望本文所述对大家的Python程序设计有所帮助。
