Python 학습 일기----스레드, 이벤트, 대기열

 1 import time ,threading 2 lock=threading.Lock()#定义一个线程锁变量 3 def run(attr): 4     lock.acquire()#申请一个线程锁 5     global num 6     print('输出:',attr) 7     #time.sleep(3) 8     num+=1 9     lock.release()#释放线程锁10     time.sleep(3)11     print('输出完成'.center(10,'〓'))12 star_time=time.time()#开始时间13 14 num=015 re_lilst=[]#定义一个列表16 for i in range(50):17     t1=threading.Thread(target=run,args=(('第%s线程'%i),))#新建线程18     #t1.setDaemon(True)#设置为守护进程 当主线程完成,守护也停止19     t1.start()#起动线程20     re_lilst.append(t1)#不用JOIN,避免阻塞为串行21 22 print(threading.current_thread(),threading.active_count())#查看线程 的主 子  活跃线程23     #print('分线程'.center(40,'☆'))24 print('数字:',num)25 for i in re_lilst:#等待线程 完成26     i.join()27 print('数字:',num)28 print('主线程'.center(60,'◇'),threading.current_thread(),threading.active_count())29 30 den_time=time.time()-star_time#总共时间31 print(den_time)

 1 import time ,threading 2 lock=threading.Lock()#定义一个线程锁变量 3 def run(attr): 4     lock.acquire()#申请一个线程锁 5     global num 6     print('输出:',attr) 7  8     #time.sleep(3) 9     num+=110     lock.release()#释放线程锁11     time.sleep(3)12     print('输出完成'.center(10,'〓'))13 14 star_time=time.time()#开始时间15 16 num=017 re_lilst=[]#定义一个列表18 for i in range(50):19     t1=threading.Thread(target=run,args=(('第%s线程'%i),))#新建线程20     t1.setDaemon(True)#设置为守护进程 当主线程完成,守护也停止21     t1.start()#起动线程22     re_lilst.append(t1)#不用JOIN,避免阻塞为串行23 24 print(threading.current_thread(),threading.active_count())#查看线程 的主 子  活跃线程25     #print('分线程'.center(40,'☆'))26 print('数字:',num)27 # for i in re_lilst:#等待线程 完成28 #    i.join()29 print('数字:',num)30 print('主线程'.center(60,'◇'),threading.current_thread(),threading.active_count())31 32 den_time=time.time()-star_time#总共时间33 print(den_time)

 1 import time ,threading 2  3 def run(i): 4     print('输出:-------',i) 5     lock.acquire()#申请锁 6     global num1 7     num1+=1 8     time.sleep(0.1) 9     lock.release()#释放锁10     return num111 12 def run2(i):13     lock.acquire()#申请锁14     global num215     print('输出:22',i)16     num2+=117     time.sleep(0.1)18     lock.release()#释放锁19     return num220 21 def run3(i):22     lock.acquire()#申请锁23     res=run(i)24     print('输出:333',i)25     res2=run2(i)26     time.sleep(0.1)27     print(res,res2)28     lock.release()#释放锁29 30 31 if __name__ == '__main__':32     star_time=time.time()#开始时间\33     num1,num2=0,034     #lock=threading.Lock()#定义一个线程锁,如是线程锁,递归时会出错35     lock=threading.RLock()#定义一个递归锁36 37     for i in range(10):38         #t1=threading.Thread(target=run,args=(('第%s线程'%i),))#新建线程39         t1=threading.Thread(target=run3,args=(('第%s线程'%i),))#新建线程40         t1.start()#起动线程41 42     else:43         print('活跃线程数:',threading.active_count())#查看线程 活跃线程数44 45 46 while threading.active_count()!=1:#不只一个线程,就是说,判断是否是剩下主线程47     #print(threading.active_count())#查看线程 活跃线程数48     pass49 else:50     print('主线程:pid,活跃线程数'.center(60,'◇'),threading.current_thread(),threading.active_count())#51     den_time=time.time()-star_time#总共时间52     print(den_time)53     print(num1,num2)

 1 #！usr/bin/env python 2 #-*-coding:utf-8-*- 3 # Author calmyan 4  5 #！usr/bin/env python 6 #-*-coding:utf-8-*- 7 # Author calmyan 8 import time ,threading 9 10 def run(attr):11     semaphore.acquire()#申请信号量线程锁12     global num13     print('输出:',attr)14     time.sleep(1)15     semaphore.release()#释放信号量线程锁16 17 star_time=time.time()#开始时间18 if __name__ == '__main__':19 20     semaphore=threading.BoundedSemaphore(4)#信号量 最多允许几个线程同时运行(多把锁)21     for i in range(50):22         t1=threading.Thread(target=run,args=(('第%s线程'%i),))#新建线程23         t1.start()#起动线程24 25 while threading.active_count()!=1:#不只一个线程,就是说,判断是否是剩下主线程26     pass27 else:28     print('主线程'.center(60,'◇'),threading.current_thread(),threading.active_count())29     den_time=time.time()-star_time#总共时间30     print(den_time)

 1 #！usr/bin/env python 2 #-*-coding:utf-8-*- 3 # Author calmyan 4  5 import threading,time 6  7 event=threading.Event()#生成一个标示位对象 8 def lighter():# 9     count=0 #定义时间秒数10     event.set()#设置标志位11     while True:12         if count>9 and count<15:#设定为红灯13             event.clear()#清除标志位,14             print(&#39;\033[41;1m变为红灯!\033[0m&#39;)15         elif count>=15 and count<18 :#为黄灯16 17             print(&#39;\033[43;1m变为黄灯!\033[0m&#39;)18         elif count>=18:19             event.set()#设置标志位20             print('\033[42;1m变为绿灯!\033[0m')21             count=0#重新计时22         else:23             print('\033[42;1m绿灯中.....!\033[0m')24         time.sleep(1)25         count+=1#每一秒钟加一次26 27 28 def car(name):29     while True:30         if event.is_set():#如果有标志 说明为绿灯31             print('[%s]在行驶中....'%name)32             time.sleep(1)33         else:34             print('[%s]在等待中.....'%name)35             event.wait()#等待获取标志36             print('绿灯亮了,[%s]继续行驶...'%name)37             time.sleep(1)38 39 40 light=threading.Thread(target=lighter,)#定义一个线程41 light.start()#启动线程42 43 car1=threading.Thread(target=car,args=('红旗轿车',))#生成一个汽车线程44 car1.start()

 1 #！usr/bin/env python 2 #-*-coding:utf-8-*- 3 # Author calmyan 4  5 #队列 生产者消费者模型 6  7 import threading,time,queue 8  9 q=queue.Queue()#创建一个队列10 11 def produ(name):#生产函数12     count=013     while True:14         bz=name+str(count)15         q.put(bz)16         print('[%s]生产了,第[%s]个[%s]g 包子'%(name,count,bz))17         count+=118         time.sleep(1.5)19 20 def consump(name):#消费者21     while True:22         i=q.get()#取23         print('[%s]拿到包子[%s],并吃了'%(name,i))24         time.sleep(0.5)25 26 27 p1=threading.Thread(target=produ,args=('王五包子铺',))#创建一个新线程 生产者28 p2=threading.Thread(target=produ,args=('麻子六包子铺',))#创建一个新线程 生产者29 r1=threading.Thread(target=consump,args=('张三',))#创建一个新线程 消费者30 r2=threading.Thread(target=consump,args=('李四',))#创建一个新线程 消费者31 p1.start()32 p2.start()33 r1.start()34 r2.start()