Python中有两个线程模块,分别是thread和threading,threading是thread的升级版。threading的功能更强大。

创建线程有3种方法:

    1、thread模块的start_new_thread函数

    2、继承自threading.Thread模块

    3、用theading.Thread直接返回一个thread对象,然后运行它的start方法

 

方法一、thread模块的start_new_thread函数

其函数原型:
    start_new_thread(function,atgs[,kwargs])
其参数含义如下:
    function: 在线程中执行的函数名
    args:元组形式的参数列表。
    kwargs: 可选参数,以字典的形式指定参数(即对一些参数进行指定初始化)

代码:

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))   这种调用形式也是可用的
    #thread.start_new_thread(hello, (2,4))
    
    thread.start_new_thread(hello, (), {"id": 1})
    thread.start_new_thread(hello, (), {"id": 2})

  

方法二:继承自threading.Thread模块

注意:必须重写run函数,而且想要运行应该调用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直接返回一个thread对象,然后运行它的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()