getting values of global variables?

[Holger Jannsen]

Hi,

ok, sounds easy, but I get a little confused...;-(

I'd like to parse over a file reading line per line.
I want to write everything through a special filter
which exchanges known tokens. This may be special
dictionaries or global variables, too.
The tokens have to be surrounded by '%'-charcter.

Getting a problem with the global varaibles. I couldn't
get their values as string and havn't found the help
in books yet. I think it's quite simple and I'm just a 
"four blind mice".;-)

To check the filter I wrote:

-------------
import string, os, re
HEIN="Blöd"

def egalizeTokens(aString):
	"changes known tokens in a string"
	try:
		splitter=re.split('(%.*?%)',aString)
	except:
		return aString
	for s in splitter:
		print s
		if len(splitter)==1:
			aTok = checkForToken(s)
		else:
			ox = string.split(s, '%')
			if len(ox)==1:
				aTok = ox[0]
			else:
				aTok = checkForToken(ox[1])
		if aTok==None:
			splitter[splitter.index(s)] = s
		else:			
			splitter[splitter.index(s)] = aTok	
	try:
		aTok = string.joinfields(splitter,'')
	except:
		aTok = splitter[0] #only one element!
	return aTok


def checkForToken(aString):
	"checks a string for known tokens"
	try: 
		aTok = eval(aString)
		if aTok==float(aString): #don't exchange numbers!
			return None
		return aTok
	except:
		aTok = os.environ.get(aString)
		if aTok==None:			
			aTok = directories.get(aString)
			if aTok==None:
				aTok = files.get(aString)
		return aTok

if __name__=='__main__':
	print egalizeTokens("This is a test! %WINDIR% %1 %2 %HEIN%. That's it")
	raw_input ("Press RETURN!")
-------------------------------

Perhaps there's a much easier way to get what I want????
(Still I am a newbie..;-)))



many thanx,
Holger