python-Lock锁线程同步和互斥

  #!/usr/bin/python
 #coding=utf-8
 #线程间通信的同步与互斥操作－锁
 import threading
 a=b=0
 lock=threading.Lock()
 def value():
     while 1:
         lock.acquire()
         if a!=b:
             print "a=%d,b=%d"%(a,b)
         lock.release()
 t=threading.Thread(target=value)
 t.start()
 while True:
     lock.acquire()
     a+=1
     b+=1
     lock.release()