用法:

先实例化  lock = threading.Lock()

1.  lock.acquire()  上锁

   需上锁代码

   lock.release()  解锁

2.  with lock:    上下两种方式都行

    需上锁代码

整体代码:

import threading

lock = threading.Lock()  建立实例

a = 0

def func(n):

  global a

  for i in range(n):

    lock.acquire()    上锁

    a += 1

    lock.release()    解锁

def func2(n):

  global a

  for i in range(n):

    lock.acquire()    上锁

    a -= 1

    lock.release()    解锁

t1 = threading.Thread(target = func,args = (10000,))

t1.start()

t2 = threading.Thread(target = func,args = (10000,))

t2.start()

t1.join()    主进程等待

t2.join()

print(a)

图例:

    Lock为线程上锁,防止数据混乱-LMLPHP

05-11 15:53