from threading import Lock
from multiprocessing import Process
from threading import Thread
#鎖將并行操作變成串行操作
def work1():
global a,b
for i in range(1000000):
mutex.acquire()
a += 1

mutex2.acquire()b += 1mutex.release()mutex2.release() print('a=%d,b=%d'%(a,b))

def work2():
global a,b
for i in range(1000000):
mutex.acquire()
a+=1

mutex2.acquire()b+=1mutex2.release()mutex.release() print('a=%d,b=%d' % (a, b))

mutex=Lock()
mutex2=Lock()
if name == ‘main’:
t1=Thread(target=work1)
t2 = Thread(target=work2)
t1.start()
t2.start()

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