def media_id(self, media_pk: str) -> str:
        """
        Get full media id

        Parameters
        ----------
        media_pk: str
            Unique Media ID

        Returns
        -------
        str
            Full media id

        Example
        -------
        2277033926878261772 -> 2277033926878261772_1903424587
        """
        media_id = str(media_pk)
        if "_" not in media_id:
            assert media_id.isdigit(), (
                "media_id must been contain digits, now %s" % media_id
            )
            user = self.media_user(media_id)
            media_id = "%s_%s" % (media_id, user.pk)
        return media_id

        Get full media id

        Parameters
        ----------
        media_pk: str
            Unique Media ID

        Returns
        -------
        str
            Full media id

        Example
        -------
        2277033926878261772 -> 2277033926878261772_1903424587
        
instagrapi/mixins/media.py