Python FunctionScheduler

FunctionScheduler.py

#!/usr/bin/python

#(c) 2011 , Narendra Sisodiya , narendra@narendrasisodiya.com 
#  Sunday, 10 April 2011
#  Released under MIT License
#
# PythonTimer is a timer class, you can download it from 
# http://code.activestate.com/recipes/577646-pythontimer/

import threading
import PythonTimer
import time

def hello():
    print "hello, world"

class FunctionScheduler():
	"This will implement the function timers class"
	
	def __init__(self, duration, function, args=[], kwargs={}):
		
		self.functionName = function
		self.duration = duration
		self.args = args
		self.kwargs = kwargs
		self.thread = threading.Timer(self.duration, self.functionName, self.args, self.kwargs)
		self.timer = PythonTimer.TickTockTimer()
		
	def Start(self):
		self.thread.start()
		self.timer.StartTimer()
	
	def Cancel(self):
		self.thread.cancel()

	def Pause(self):
		self.thread.cancel()
		self.timer.Pause()
	
	def UnPause(self):
		self.duration =  self.duration - self.timer.GetTime()
		self.thread = threading.Timer(self.duration, self.functionName, self.args, self.kwargs)
		self.thread.start()
		self.timer.StartTimer()
			
	def TimeLeft(self):
		return self.duration - self.timer.GetTime()
	
	
	
	
myfunc = FunctionScheduler(8.0, hello)
myfunc.Start()

print myfunc.TimeLeft()
time.sleep(1)
print myfunc.TimeLeft()
time.sleep(1)
print myfunc.TimeLeft()
time.sleep(1)
print myfunc.TimeLeft()
time.sleep(1)
print myfunc.TimeLeft()

myfunc.Pause()
time.sleep(1)
print myfunc.TimeLeft()
time.sleep(1)
print myfunc.TimeLeft()
time.sleep(1)
print myfunc.TimeLeft()
time.sleep(1)
print myfunc.TimeLeft()

myfunc.UnPause()
print myfunc.TimeLeft()
time.sleep(1)
print myfunc.TimeLeft()
time.sleep(1)
print myfunc.TimeLeft()
time.sleep(1)
print myfunc.TimeLeft()
time.sleep(1)
print myfunc.TimeLeft()