进程锁和共享池

一、进程锁

from multiprocessing import Process,Lock

def lock_f(l,i):    l.acquire()    try:        print ("multip - %s" % i )    finally:        l.release()

if __name__=="__main__":    lock = Lock()    for num in range(10):        Process(target=lock_f,args = (lock,num)).start()二、进程池

from multiprocessing import Process,Pool,freeze_supportimport timeimport os

def Foo(i):    time.sleep(1)    print("in process!",os.getpid())    return i+100

def Bar(args):    print ("-->exec done!",args,os.getpid())

if __name__=="__main__":    pool = Pool(processes=2) #允许进程池同时放入2个进程;    print("主进程池：",os.getpid())    for i in range(10):        #pool.apply(func = Foo,args=(i,))#apply支持串行；        #pool.apply_async(func=Foo,args=(i,)) #apply_async支持并行;        pool.apply_async(func=Foo,args=(i,),callback=Bar)

print ("end!")    pool.close()    pool.join()#进程池中进程，执行完毕后，再关闭；如果注视掉该行，那么程序直接关闭.