一、启动线程
启动太简单了,随便一篇python教程有关多线程的讲解都会讲到;
二、停止线程
这里分享2种思路,
方法1:(亲测可用,就是有点繁琐了)
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import inspect import ctypes def _async_raise(tid, exctype): """raises the exception, performs cleanup if needed""" tid = ctypes.c_long(tid) if not inspect.isclass(exctype): exctype = type (exctype) res = ctypes.pythonapi.PyThreadState_SetAsyncExc(tid, ctypes.py_object(exctype)) if res = = 0 : raise ValueError( "invalid thread id" ) elif res ! = 1 : # """if it returns a number greater than one, you're in trouble, # and you should call it again with exc=NULL to revert the effect""" ctypes.pythonapi.PyThreadState_SetAsyncExc(tid, None ) raise SystemError( "PyThreadState_SetAsyncExc failed" ) def stop_thread(thread): _async_raise(thread.ident, SystemExit) |
定义完上面的2个函数后,如下一样调用即可
stop_thread(myThread)
(方法2)(亲测可用,就是基本思路,全局变量的使用,python 的基本知识)
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import threading import time class MyThread(threading.Thread): def __init__( self ): threading.Thread.__init__( self ) self .Flag = True #停止标志位 self .Parm = 0 #用来被外部访问的 def run( self ): while ( True ): if ( not self .Flag): break else : time.sleep( 2 ) def setFlag( self ,parm): #外部停止线程的操作函数 self .Flag = parm #boolean def setParm( self ,parm): #外部修改内部信息函数 self .Parm = parm def getParm( self ): #外部获得内部信息函数 return self .Parm if __name__ = = "__main__" : testThread = MyThread() testThread.setDaemon( True ) #设为保护线程,主进程结束会关闭线程 testThread.start() #开始线程
time.sleep( 2 ) #主进程休眠 2 秒 testThread.setFlag( False ) #修改线程运行状态 time.sleep( 2 )
print (testThread.is_alive()) #查看线程运行状态 |
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def __init__( self ): self .Flag = True #停止标志位 self .Parm = 0 #用来被外部访问的 #自行添加参数 |
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def __init__( self ): threading.Thread.__init__( self ) self .Flag = True #停止标志位 self .Parm = 0 #用来被外部访问的 |