Python多線程學習(一,、線程的使用)

望風de鳥 2013-11-28

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一,、Python中的線程使用：

Python中使用線程有兩種方式：函數(shù)或者用類來包裝線程對象。

1,、函數(shù)式：調用thread模塊中的start_new_thread()函數(shù)來產生新線程,。如下例：

import time
import thread
def timer(no, interval):
cnt = 0
while cnt<10:
print 'Thread:(%d) Time:%s/n'%(no, time.ctime())
time.sleep(interval)
cnt+=1
thread.exit_thread()
def test(): #Use thread.start_new_thread() to create 2 new threads
thread.start_new_thread(timer, (1,1))
thread.start_new_thread(timer, (2,2))
if __name__=='__main__':
test()

上面的例子定義了一個線程函數(shù)timer,它打印出10條時間記錄后退出，每次打印的間隔由interval參數(shù)決定,。thread.start_new_thread(function, args[, kwargs])的第一個參數(shù)是線程函數(shù)（本例中的timer方法）,，第二個參數(shù)是傳遞給線程函數(shù)的參數(shù)，它必須是tuple類型,，kwargs是可選參數(shù),。

線程的結束可以等待線程自然結束，也可以在線程函數(shù)中調用thread.exit()或thread.exit_thread()方法,。

2,、創(chuàng)建threading.Thread的子類來包裝一個線程對象，如下例：

[python] view plain copy print ?

import threading
import time
class timer(threading.Thread): #The timer class is derived from the class threading.Thread
def __init__(self, num, interval):
threading.Thread.__init__(self)
self.thread_num = num
self.interval = interval
self.thread_stop = False
def run(self): #Overwrite run() method, put what you want the thread do here
while not self.thread_stop:
print 'Thread Object(%d), Time:%s/n' %(self.thread_num, time.ctime())
time.sleep(self.interval)
def stop(self):
self.thread_stop = True
def test():
thread1 = timer(1, 1)
thread2 = timer(2, 2)
thread1.start()
thread2.start()
time.sleep(10)
thread1.stop()
thread2.stop()
return
if __name__ == '__main__':
test()