python執行緒同步

import threading

import time
class mythread(threading.thread):
def __init__(self,threadid,name,counter):
threading.thread.__init__(self)
self.threadid=threadid
self.name=name
self.counter=counter
def run(self):
print("開啟執行緒"+self.name)
threadlock.acquire()#加鎖
print_time(self.name,self.counter,3)
threadlock.release()#解鎖
def print_time(threadname,delay,number):
while number:
time.sleep(delay)
print("%s: %s"%(threadname,time.ctime(time.time())))
number-=1
threadlock=threading.lock()#建立鎖
threads=#建立空列表
#建立兩個執行緒
thread1=mythread(1,"thread_1",1)
thread2=mythread(2,"thread_2",2)
# 開啟新執行緒
thread1.start()
thread2.start()
# 新增執行緒到執行緒列表
# 等待所有執行緒完成
for t in threads:
t.join()
print ("退出主線程")
#或者# thread1.join()
# thread2.join()
# print ("退出主線程")

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