def getLog(self, identifier):
        """Given a unix time, return a LogReader for an old log file."""
        if self.toDate(identifier) == self.lastDate:
            return self.getCurrentLog()
        filename = (self.path, self.suffix(identifier)) % "%s.%s"
        if not os.path.exists(filename):
            raise ValueError, "no such logfile exists"
        return LogReader(filename)
dataset/ETHPy150Open nlloyd/SubliminalCollaborator/libs/twisted/python/logfile.py/DailyLogFile.getLog/swapped operands of `%`