ThreadPoolExecutor代码笔记importthreadingfromconcurrentimportfuturesimportloggingimporttimeFORMAT='%(processName)s%(threadName)s%(process)d%(thread)d%(message)s'logging.basicConfig(level=logging.INFO,form
importloggingimportdatetimeimportmultiprocessingFORMAT="%(process)d%(processName)s%(thread)d%(message)s"logging.basicConfig(level=logging.INFO,format=FORMAT)defcalc(i):sum=0for_inrange(100000000):sum+
multiprocessing多进程代码演示主要是和多线程在CPU密集型操作时的所耗时间对比importmultiprocessingimportdatetimedefcalc(i):sum=0for_inrange(1000):sum+=1print(i,sum)if__name__=='__main__':start=datetime.datetime.now()ps=[]foriinrang
threadingRlock多线程代码importthreadingimporttimelock=threading.RLock()print(lock.acquire())defsub(l):print('{}:{}'.format(threading.current_thread(),l.acquire()))print('{}:{}'.format(threading.current_thr
主要用于生产者，消费者模型消费者消费速度大于生产者生产速度例子classDispatcher:def__init__(self):self.data=Noneself.event=threading.Event()defproduce(self,total):for_inrange(total):data=random.randint(0,100)logging.info(data)self.da
演示局部变量importthreadingimporttimedefworker():x=0foriinrange(100):time.sleep(0.0001)x+=1print(threading.current_thread(),x)foriinrange(3):threading.Thread(target=worker).start()测试使用全局变量classA:def__init__
threading.Timer实现延迟执行的实例代码importtimeimportthreadingimportloggingFORMAT="%(asctime)s%(threadName)s%(thread)d%(message)s"logging.basicConfig(format=FORMAT,level=logging.INFO)defworker():logging.info('in
threading的join方式使用实例代码importtimeimportthreadingdeffoo(n):foriinrange(n):print(i)time.sleep(1)t_list=[]for_inrange(2):t=threading.Thread(target=foo,args=(10,),daemon=True)t_list.append(t)t.start()forii
threading的daemon和non-daemon看python主线程是如何等待importtimeimportthreadingdeffoo(n):foriinrange(n):print(i)time.sleep(1)t1=threading.Thread(target=foo,args=(10,),daemon=True)#尝试替换这里的10和下面20的顺序t1.start()t2=th
threadingTreadrun()和start()区别importthreadingimporttimedefworker():count=0whileTrue:ifcount>5:breaktime.sleep(1)count+=1print('workerrunningandthreading_name={}'.format(threading.current_thread().na
name，ident，is_active参数的演示importthreadingimporttimedefworker():count=0whileTrue:ifcount>5:breaktime.sleep(2)count+=1print(threading.current_thread().name)t=threading.Thread(target=worker,name="worke
semaphore信号量的简单代码演示importthreadingimportloggingimporttimeFORMAT='%(threadName)s%(thread)d%(message)s'logging.basicConfig(format=FORMAT,level=logging.INFO)defworker(s:threading.Semaphore):logging.info(
直接用单线程执行for循环，执行5次，计算执行的时间importloggingimportdatetimeFORMAT='%(threadName)s%(thread)d%(message)s'logging.basicConfig(format=FORMAT,level=logging.INFO)start=datetime.datetime.now()defcalc():sum=0for_in
Barrier示例代码
threading Event例子
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