python模拟sed在每行添加##

q968

[root@host-192-168-209-128 py-sed]# cat tou.py　　#!/usr/bin/env python
　　'''
　　edit by qhz
　　Email : world77@163.coom
　　This scrip to add "###" at every line for file
　　'''
　　def usage():
　　print   '''
　　===============================================
　　This script to add "###" at every line for file
　　Use Example:
　　python script.py file
　　===============================================
　　'''
　　import sys
　　import os
　　if len(sys.argv) == 2:
　　if os.path.isfile(sys.argv[1]):
　　with open(sys.argv[1]) as f:
　　con=f.readlines()
　　for i in range(0,len(con)):
　　print '###'+con.strip('\n')
　　else:
　　print "==============================================="
　　print "Your input file name is not exit or not correct"
　　print "Please try again ,bye ..."
　　print "==============================================="
　　else:
　　usage()
　　exit()
　　[root@host-192-168-209-128 py-sed]#