def opt_default(self):
        if self.last_domain:
            self.service.addDomain('', self.last_domain)
        else:
            raise usage.UsageError("Specify a domain before specifying using --default")
Log an error message,
dataset/ETHPy150Open tkanerva/openmail/OpenMail/openmail/mytap.py/Options.opt_default--crossover with--dataset/ETHPy150Open sahana/eden/modules/s3log.py/S3Log._error