password_validation.py 文件源码

def validate(self, password, user=None):
        if not user:
            return

        for attribute_name in self.user_attributes:
            value = getattr(user, attribute_name, None)
            if not value or not isinstance(value, string_types):
                continue
            value_parts = re.split(r'\W+', value) + [value]
            for value_part in value_parts:
                if SequenceMatcher(a=password.lower(), b=value_part.lower()).quick_ratio() > self.max_similarity:
                    try:
                        verbose_name = force_text(user._meta.get_field(attribute_name).verbose_name)
                    except FieldDoesNotExist:
                        verbose_name = attribute_name
                    raise ValidationError(
                        _("The password is too similar to the %(verbose_name)s."),
                        code='password_too_similar',
                        params={'verbose_name': verbose_name},
                    )