editing a config file

[Mike Zupan]

I need to edit the value(s) of a config file via a GUI interface. I'm
trying to use ConfigParser but set() doesn't seem to write.

Here are my reading and writing functions

	def getConfig(self,value=None):
		config = ConfigParser.ConfigParser()
		config.readfp(open('config.inf'))
		return config.defaults()[value]
		
	def setConfig(self, option, value):
		config = ConfigParser.ConfigParser()
		config.readfp(open('config.inf', 'a'))
		config.set("DEFAULT", option, value)

The values are getting passed ok it just won't set the value to the
new value i have selected.

can anyone offer any hints?