复制代码 代码如下:

class SLTimer(multiprocessing.Process):

from datetime import datetime

#import time

def __init__(self, target=None, args=(), kwargs={},date=None,time=None):  
    '''\  
    @param date 1900-01-01  
    @param time 00:00:00  
    '''  
    super(SLTimer,self).__init__(target=target,args=args,kwargs=kwargs)  
    _date = ''  
    if date is None:  
        _date = datetime.now().__str__()[:10]  
    else :  
        _date = date

    _time = ''  
    if time is None:  
        _time = datetime.now().__str__()[11:19]  
    else:  
        _time = time

    self.__runtime = '%s %s' % (_date,_time)

def run(self):  
    timeLen = len('1900-00-00 00:00:00')

    while True:  
        now = datetime.now().__str__()[:timeLen]  
        if now>=self.__runtime:  
            break  
        print 'sleeping... %s' % now  
        time.sleep(1.0)

    super(SLTimer,self).run()