創建了一個threadOne類，它繼承了threading.Thread，重寫了從父類繼承的run方法，start()方法用於啟動線程,run()方法將在線程開啟後執行，
import threading
import time
class threadOne(threading.Thread):
"""docstring for threadOne"""
def __init__(self, num,name):
super(threadOne, self).__init__()
self.name = name
self.num = num
def run(self):
print self.name+'doing:...'
if __name__ == '__main__':
for i in xrange(5):
t = threadOne(i,'thread-'+str(i))
t.start()
time.sleep(2) #確保線程都執行完畢
#output#
#並行執行的
thread-0doing:...thread-1doing:...
thread-2doing:...thread-3doing:...
thread-4doing:...
join(timeout)
可以一個線程可以等待另一個線程執行結束後再繼續運行。通過設置timeout，可以避免無休止的等待
import threading
import time
class threadOne(threading.Thread):
"""docstring for threadOne"""
def __init__(self, num,name):
super(threadOne, self).__init__()
self.name = name
self.num = num
def setT(self,time):
self.time = time
def run(self):
print '%s will work %d seconds' %(self.name,self.time)
time.sleep(self.time)
print '%s have finished!' %(self.name)
if __name__ == '__main__':
tasks = []
for i in xrange(1,5):
t = threadOne(i,'thread_:'+str(i))
t.setT(i)
t.start()
tasks.append(t)
print 'main thread waiting for exit...'
for t in tasks:
t.join(1)
print 'main thread have finished!'
#output#
thread_:1 will work 1 secondsthread_:2 will work 2 seconds
thread_:3 will work 3 secondsthread_:4 will work 4 seconds
main thread waiting for exit...
thread_:1 have finished!
thread_:2 have finished!
thread_:3 have finished!
main thread have finished! #there thread_:4 not wait
thread_:4 have finished!
setDaemon()
默認主進程會在所有的子進程結束後自動退出，如果設置setDaemon則主線程在退出時會結束所有的子進程
import threading
import time
class threadOne(threading.Thread):
"""docstring for threadOne"""
def __init__(self, num,name):
super(threadOne, self).__init__()
self.name = name
self.num = num
def setT(self,time):
self.time = time
def run(self):
print '%s will work %d seconds' %(self.name,self.time)
time.sleep(self.time)
print '%s have finished!' %(self.name)
if __name__ == '__main__':
print 'main thread waiting for exit...'
for i in xrange(1,5):
t = threadOne(i,'thread_:'+str(i))
t.setT(i)
t.setDaemon(True)
t.start()
#main thread processing
time.sleep(1)
print 'main thread have finished!'
#output#
main thread waiting for exit...
thread_:1 will work 1 secondsthread_:2 will work 2 seconds
thread_:4 will work 4 secondsthread_:3 will work 3 seconds
thread_:1 have finished!
main thread have finished! #only thread_1 working other not work
