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Message: [QUOTE="Diez B. Roggisch, post: 1803039"] Usually we don't bothe too much. But it has been suggested to do something like this: class Matcher: def __init__(self, rex): self.rex = rex def match(self, s): self.m = self.rex.match(s) return not self.m is None Then you can do m = Matcher(rex) if m.match(line): print m.m Of course you can enhance the class mather so that all methods it does not define by itself are delegated to self.m, which would be more convient. But I'm currently too lazy to write that down :) [/QUOTE]