tracktime.py

import time
def tracktime(f):
	import time
	def x(*a, **kw):
		start = time.time()
		res = f(*a, **kw)
		print 'code work %d ms time'%((time.time()-start)*10**3)
		return res
	return x
@tracktime
def sleep(second):
	print 'try to sleep %f sec' % (second)
	time.sleep(second)


sleep(1)
sleep(0.01)
sleep(0.001)