Python多线程

#!/usr/bin/env python3
#coding=utf-8

import threading
import time
import ThreadTime
exitFlag=0
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("开始线程:"+self.name)
        print_time(self.name,self.counter,5)
        print("退出线程:"+self.name)

def print_time(threadName,delay,counter):
    while counter:
        if exitFlag:
            threadName.exit()
        time.sleep(delay)
        print("%s:%s"%(threadName,time.ctime(time.time())))
        counter-=1
#创建连个线程
try:
    #创建新线程
    thread1=myThread(1,"Thread-1",1)
    thread2=myThread(2,"Thread-2",2)
    #开启新线程
    thread1.start()
    thread2.start()
    thread1.join()
    thread2.join()
    print("退出主线程")
except:
    print("Error:无法启动线程")

#线程同步
#!/usr/bin/env python3
#coding=utf-8
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("开启线程:"+self.name)
        #获取锁，用于线程同步
        threadLock.acquire()
        print_time(self.name,self.counter,6)
        #释放锁，开启下一个线程
        threadLock.release()
def print_time(threadName,delay,counter):
    while counter:
        time.sleep(delay)
        print("%s:%s"%(threadName,time.ctime(time.time())))
        counter-=1
threadLock=threading.Lock()
threads=[]
#创建新线程
thread1=myThread(1,"Thread-1",1)
thread2=myThread(2,"Thread-2",2)
#开启新线程
thread1.start()
thread2.start()

#添加线程到线程列表
threads.append(thread1)
threads.append(thread2)

#等待所有线程完成
for t in threads:
    t.join()
    print("退出线程"+t.name)
print("退出主线程")

 

#!/usr/bin/env python3
#coding=utf-8
#队列 安全


import queue
import threading
import time

exitFlag = 0

class myThread (threading.Thread):
    def __init__(self, threadID, name, q):
        threading.Thread.__init__(self)
        self.threadID = threadID
        self.name = name
        self.q = q
    def run(self):
        print ("开启线程：" + self.name)
        process_data(self.name, self.q)
        print ("退出线程：" + self.name)

def process_data(threadName, q):
    while not exitFlag:
        queueLock.acquire()
        if not workQueue.empty():
            data = q.get()
            queueLock.release()
            print ("%s processing %s" % (threadName, data))
        else:
            queueLock.release()
        time.sleep(1)

threadList = ["Thread-1", "Thread-2", "Thread-3"]
nameList = ["One", "Two", "Three", "Four", "Five"]
queueLock = threading.Lock()
workQueue = queue.Queue(10)
threads = []
threadID = 1

# 创建新线程
for tName in threadList:
    thread = myThread(threadID, tName, workQueue)
    thread.start()
    threads.append(thread)
    threadID += 1

# 填充队列
queueLock.acquire()
for word in nameList:
    workQueue.put(word)
queueLock.release()

# 等待队列清空
while not workQueue.empty():
    pass

# 通知线程是时候退出
exitFlag = 1

# 等待所有线程完成
for t in threads:
    t.join()
print ("退出主线程")

运行结果：

开启线程：Thread-2
开启线程：Thread-3
Thread-1 processing One
Thread-3 processing Two
Thread-2 processing Three
Thread-1 processing Four
Thread-3 processing Five
退出线程：Thread-2
退出线程：Thread-1
退出线程：Thread-3
退出主线程