python implementation of automatic restart of this program

#!/usr/local/bin/python
#-*- coding: UTF-8 -*-
####################################################################
# python automatically restarts this program
####################################################################
#import os,time
#def close():
# print "Program restart ！！！！"
#  print ('%Y.%m.%d-%H.%M.%S')
# (2) #3 seconds
#  p = ('')
#  while True:
#    line = ();
#    if '' == line:
#      break
#    print line
#if __name__ == '__main__':
#  close()
####################################################################
import time
import sys
import os
def restart_program():
  python = 
  (python, python, * )
if __name__ == "__main__":
  print 'start...'
#  answer = raw_input("Do you want to restart this program ? ")
#  if () in "y Y yes Yes YES".split():
#    restart_program()
  print u"In three seconds, the program will end...".encode("gbk")
  (3)
  restart_program()