Python 实现某个功能每隔一段时间被执行一次的功能方法

# -*- coding: utf-8 -*-
# ==================================================
# 对 Timer 做以下再封装的目的是：当某个功能需要每隔一段时间被
# 执行一次的时候，不需要在回调函数里对 Timer 做重新安装启动
# ==================================================
__author__ = 'liujiaxing'

from threading import Timer
from datetime import datetime

class MyTimer( object ):

 def __init__( self, start_time, interval, callback_proc, args=None, kwargs=None ):

  self.__timer = None
  self.__start_time = start_time
  self.__interval = interval
  self.__callback_pro = callback_proc
  self.__args = args if args is not None else []
  self.__kwargs = kwargs if kwargs is not None else {}

 def exec_callback( self, args=None, kwargs=None ):
  self.__callback_pro( *self.__args, **self.__kwargs )
  self.__timer = Timer( self.__interval, self.exec_callback )
  self.__timer.start()

 def start( self ):
  interval = self.__interval - ( datetime.now().timestamp() - self.__start_time.timestamp() )
  print( interval )
  self.__timer = Timer( interval, self.exec_callback )
  self.__timer.start()

 def cancel( self ):
  self.__timer.cancel() 
  self.__timer = None

class AA:
 def hello( self, name, age ):
  print( "[%s]\thello %s: %d\n" % ( datetime.now().strftime("%Y%m%d %H:%M:%S"), name, age ) )

if __name__ == "__main__":

 aa = AA()
 start = datetime.now().replace( minute=3, second=0, microsecond=0 )
 tmr = MyTimer( start, 60*60, aa.hello, [ "owenliu", 18 ] )
 tmr.start()
 tmr.cancel()