def coerce(cls, string):
        """Create a :class:`Requirement` object from a given package spec."""
        match = re.match(cls.spec_regex, string)
        if not match:
            raise InvalidRequirementSpecError("could not parse requirement")
        package = match.group(1)
        if all(match.group(2, 3)):
            version = "".join(match.group(2, 3))
        else:
            version = None
        return cls(package, version)
def retire_user(cls, user_id):
        """
        Retire user as part of GDPR Phase I
        Returns 'True' if records found

        :param user_id: int
        :return: bool
        """
        try:
            user_obj = User.objects.get(id=user_id)
        except User.DoesNotExist:
            return False

        photo_objects = cls.objects.filter(
            user=user_obj
        ).update(
            name='',
            face_image_url='',
            photo_id_image_url='',
            photo_id_key=''
        )
        return photo_objects > 0