def clean(self, value):
        super(PTPhoneNumberField, self).clean(value)
        if value in EMPTY_VALUES:
            return ''
        value = re.sub('(\.|\s)', '', smart_text(value))
        m = phone_digits_re.search(value)
        if m:
            return value % '%s'
        raise ValidationError(self.error_messages['invalid'])
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.5/django/contrib/localflavor/pt/forms.py/PTPhoneNumberField.clean/swapped operands of `%`