An attempt at sending a message to a GroupMe group that includes @mentions for users.

send_groupme_message_with_notifications.py

def _send_message(bot, message_to_send):
    attachments = _format_attachments(bot, message_to_send)
    print(attachments)
    response = requests.post(
        f"{GROUPME_URL}/bots/post",
        params={"token": GROUPME_TOKEN},
        data = {
            "bot_id": bot.get("bot_id"),
            "text": message_to_send,
            "attachments": attachments
        }
    )

def _format_attachments(bot, message_to_send):
    if "@" in message_to_send:
        group_members = _get_group_members(bot.get('group_name'))
        user_id_list = []
        loci_list = []
        for instance in re.finditer("@\w+\s\w+", message_to_send):
            mention_found = instance.group(0)
            member_to_mention = [
                member for member in group_members
                if mention_found.replace('@', '') == member.get('nickname')
            ]
            if member_to_mention:
                first_name = mention_found.split(' ')[0]
                print(first_name)
                member_to_mention = member_to_mention[0]
                user_id_list.append(member_to_mention.get('user_id'))
                loci_list.append([instance.start(), len(first_name)])
        attachments = [
            {
                "type": "mentions",
                "user_ids": user_id_list,
                "loci": loci_list
            }
        ]
        print(attachments)
        return attachments

    return []

def _get_group_members(group_name):
    response = requests.get(
        f"{GROUPME_URL}/groups",
        params={
            "token": GROUPME_TOKEN
        }
    )
    response = response.json().get('response')
    group = [
        group for group in response
        if group.get('name') == group_name
    ][0]
    members = group.get('members')
    print(members)
    return members