a kind of simple sed for config files

c-sed.py

#!/bin/env python

import sys
from ConfigParser import SafeConfigParser, NoOptionError
from optparse import OptionParser
parser = OptionParser()
parser.add_option("-s", "--set", dest="set", action='append', help="use to add or change an option, eg --set=processor,autostart,true\nwill add autostart=true to the [processor] section")
parser.add_option("-g", "--get", dest="get",  help="use to get an option, eg --get=processor,autostart\ncould return true, the default return falue is an empty string:''")
(options, args) = parser.parse_args()



config = SafeConfigParser()
config.readfp(sys.stdin)

if options.set:
	for setting in options.set:
		section,option,value = setting.split(",")
		if not config.has_section(section):
			config.add_section(section)
		config.set(section,option,value)
		config.write(sys.stdout)
elif options.get:
	section,option = options.get.split(",")
	try:
		print config.get(section,option)	
	except NoOptionError:
		print ''