Python中有兩個線程模塊,分別是thread和threading,threading是thread的升級版。threading的功能更強大。
創建線程有3種方法:
1、thread模塊的start_new_thread函數
2、繼承自threading.Thread模塊
3、用theading.Thread直接返回一個thread對象,然后運行它的start方法
方法一、thread模塊的start_new_thread函數
其函數原型:
start_new_thread(function,atgs[,kwargs])
其參數含義如下:
function: 在線程中執行的函數名
args:元組形式的參數列表。
kwargs: 可選參數,以字典的形式指定參數(即對一些參數進行指定初始化)
代碼:
import thread
def hello(id = 0, interval = 2):
for i in filter(lambda x: x % interval == 0, range(10)):
print "Thread id : %d, time is %d\n" % (id, i)
if __name__ == "__main__":
#thread.start_new_thread(hello, (1,2)) 這種調用形式也是可用的
#thread.start_new_thread(hello, (2,4))
thread.start_new_thread(hello, (), {"id": 1})
thread.start_new_thread(hello, (), {"id": 2})
方法二:繼承自threading.Thread模塊
注意:必須重寫run函數,而且想要運行應該調用start方法
import threading
class MyThread(threading.Thread):
def __init__(self, id, interval):
threading.Thread.__init__(self)
self.id = id
self.interval = interval
def run(self):
for x in filter(lambda x: x % self.interval == 0, range(10)):
print "Thread id : %d time is %d \n" % (self.id, x)
if __name__ == "__main__":
t1 = MyThread(1, 2)
t2 = MyThread(2, 4)
t1.start()
t2.start()
t1.join()
t2.join()
方法三:用theading.Thread直接返回一個thread對象,然后運行它的start方法
import threading
def hello(id, times):
for i in range(times):
print "hello %s time is %d\n" % (id , i)
if __name__ == "__main__":
t = threading.Thread(target=hello, args=("hawk", 5))
t.start()
