def __unicode__(self):
        if self.first_name and self.last_name:
            return u'%s %s' % (self.first_name, self.last_name)
        return self.username % u'%s'
dataset/ETHPy150Open letolab/airy/airy/skeleton/project/users/models.py/User.__unicode__/swapped operands of `%`