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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def reread(self):
 """ Read configuration file and substitute references into checks conf """

        logger.debug("Loading settings from %s",
                     os.path.abspath(self.filename))
        conf = self.read_conf()
        changed = self.creds.reread()
        checks = self.parser.parse_checks(conf)
        if self.checks != checks:
            self.checks = checks
            return True
        else:
            return changed