1.信号量
import threading,time class myThread(threading.Thread): def run(self): if semaphore.acquire(): print(self.name) time.sleep(3) semaphore.release() if __name__=="__main__": semaphore=threading.Semaphore() thrs=[] for i in range(100): thrs.append(myThread()) for t in thrs: t.start()
2.同步对象
import threading,time class Boss(threading.Thread): def run(self): print("BOSS：今晚大家都要加班到22:00。") print(event.isSet())# False event.set() time.sleep(5) print("BOSS：<22:00>可以下班了。") print(event.isSet()) event.set() class Worker(threading.Thread): def run(self): event.wait()# 一旦event被设定，等同于pass print("Worker：哎……命苦啊！") time.sleep(1) event.clear() event.wait() print("Worker：OhYeah!") if __name__=="__main__": event=threading.Event() threads=[] for i in range(5): threads.append(Worker()) threads.append(Boss()) for t in threads: t.start() for t in threads: t.join() print("ending.....")
3.生产者消费者模型
# import time,random # import queue,threading # # q = queue.Queue() # # def Producer(name): # count = 0 # while count <10: # print("making........") # time.sleep(5) # q.put(count) # print('Producer %s has produced %s baozi..' %(name, count)) # count +=1 # #q.task_done() # q.join() # print("ok......") # def Consumer(name): # count = 0 # while count <10: # time.sleep(random.randrange(4)) # # if not q.empty(): # # print("waiting.....") # #q.join() # data = q.get() # print("eating....") # time.sleep(4) # # q.task_done() # #print(data) # print(' 33[32;1mConsumer %s has eat %s baozi... 33[0m' %(name, data)) # # else: # # print("-----no baozi anymore----") # count +=1 # # p1 = threading.Thread(target=Producer, args=('A君',)) # c1 = threading.Thread(target=Consumer, args=('B君',)) # c2 = threading.Thread(target=Consumer, args=('C君',)) # c3 = threading.Thread(target=Consumer, args=('D君',)) # # p1.start() # c1.start() # c2.start() # c3.start()
4.递归锁
import threading import time class MyThread(threading.Thread): def actionA(self): r_lcok.acquire() #count=1 print(self.name,"gotA",time.ctime()) time.sleep(2) r_lcok.acquire() #count=2 print(self.name, "gotB", time.ctime()) time.sleep(1) r_lcok.release() #count=1 r_lcok.release() #count=0 def actionB(self): r_lcok.acquire() print(self.name, "gotB", time.ctime()) time.sleep(2) r_lcok.acquire() print(self.name, "gotA", time.ctime()) time.sleep(1) r_lcok.release() r_lcok.release() def run(self): self.actionA() self.actionB() if __name__ == '__main__': # A=threading.Lock() # B=threading.Lock() r_lcok=threading.RLock() L=[] for i in range(5): t=MyThread() t.start() L.append(t) for i in L: i.join() print("ending....")
5.进程调用
# from multiprocessing import Process # import time # # # def f(name): # time.sleep(1) # print('hello', name,time.ctime()) # # if __name__ == '__main__': # p_list=[] # for i in range(3): # # p = Process(target=f, args=('alvin',)) # p_list.append(p) # p.start() # # for i in p_list: # i.join() # print('end') from multiprocessing import Process import time # class MyProcess(Process): # # # def __init__(self): # # super(MyProcess, self).__init__() # # #self.name = name # # def run(self): # time.sleep(1) # print ('hello', self.name,time.ctime()) # # if __name__ == '__main__': # p_list=[] # # # for i in range(3): # p = MyProcess() # p.daemon=True # p.start() # p_list.append(p) # # # for p in p_list: # # p.join() # # print('end') # from multiprocessing import Process # import os # import time # # # def info(title): # print("title:", title) # print('parent process:', os.getppid()) # print('process id:', os.getpid()) # # def f(name): # # info('function f') # print('hello', name) from multiprocessing import Process import os import time def info(title): print("title",title) print("parent process:",os.getppid()) print("process id:",os.getpid()) def f(name): info('function f') print("hello",name) if __name__ == '__main__': info('main process line') time.sleep(1) print("-------") p = Process(target=info("yuan")) p.start() p.join() # if __name__ == '__main__': # # info('main process line') # # time.sleep(1) # print("------------------") # p = Process(target=info, args=('yuan',)) # p.start() # p.join()