[SOLVED] Why does regex fail cleaning line?

[Winfried]

Hello,

I can't figure out why this regex fails editing an XML header:

with open(INPUTFILE) as reader:
	content = reader.read()
#I need to just get <gpx>
#OK content = re.sub('<gpx', '<BLAH', content)
#BAD content = re.sub('<gpx.+?>', '<gpx>', content,re.MULTILINE)
#BAD content = re.sub('<gpx.+?>', '<gpx>', content,re.MULTILINE|re.DOTALL)
#BAD content = re.sub('<gpx.+?>', '<gpx>', content,re.MULTILINE|re.DOTALL|re.IGNORECASE)

Any idea what I could try?

Thank you.