python 多线程

创建ThreadFunc类和创建Thread对象，来实现多线程。
创建新线程的时候，Thread对象会调用我们的TreadFunc对象，这是会用到一个特殊的函数__call__()。由于有一个参数的元组，这时要在代码中使用apply()函数。

# -*- coding: utf-8 -*-
"""
Created on Tue Sep 08 15:04:14 2015

@author: wt
"""

import threading
from time import sleep,ctime

loops = [4, 2]

class ThreadFunc(object):

    def __init__(self, func, args,name=''):
        self.name = name
        self.func = func
        self.args = args

    def __call__(self):
        apply(self.func, self.args)

    def loop(nloop, nsec):
        print 'start loop',nloop,'at:', ctime()
        sleep(nsec)
        print 'loop', nloop, 'done at:', ctime()

    def main():
        print 'starting at:',ctime()
        threads = []
        nloops = range(len(loops))

        for i in nloops:
            t = threading.thread(target=threadFunc(loop,(i,loop[i]),
                                loop.__name__))
            threads.append(t)

        for i in nloops:
            threads[i].start()

        for i in nloops:
            threads[i].join()

        print 'all DONE at:',ctime()

if __name__ == '__main__':
    main()

运行结果：

starting at: Tue Sep 08 15:30:54 2015
start loop 0 at: Tue Sep 08 15:30:54 2015
start loop 1 at: Tue Sep 08 15:30:54 2015
loop 1 done at: Tue Sep 08 15:30:56 2015
loop 0 done at: Tue Sep 08 15:30:58 2015
all DONE at: Tue Sep 08 15:30:58 2015