def clean (self, value):
        email_re = re.compile(r'[\w\d\.\-\+]+@[\w\d\.\-\+]+\.[\w\d\.\-\+]+')
        if not email_re.match(value):
            raise forms.ValidationError('You must enter a valid email address')
        query = db.Query(User)
        count = query.filter('email = ', value).count()
        
        if count > 0:
            raise forms.ValidationError(value % '%s is already registered.  Please try a different email address.')
            
        return value
dataset/ETHPy150Open bgolub/fftogo/django_ae_utils/auth/models.py/UniqueEmailField.clean/swapped operands of `%`