cleanup-maildir.py 文件源码

def getSubjectHash(self):
        """get the message's subject in a "normalized" form

        This currently means lowercasing and removing any reply or forward
        indicators.
        """
        import re
        import string
        s = self.getSubject()
        if s == None:
            return '(no subject)'
        return re.sub(r'^(re|fwd?):\s*', '', string.strip(s.lower()))