MailChimp Modify User's Tag (add, update, deactivate) - The Python implementation that doesn't use their SDK

mailchimp_modify_user_tag.py

import hashlib
import requests
import os
import json


"""
Docs: https://mailchimp.com/developer/guides/organize-contacts-with-tags/#label-a-contact-with-a-tag
Emails must be MD5 hashed before sending the call (such is done so below)
The API returns 204 No Content no matter if the input is valid or invalid
    This means it will fail silently (e.g. if the value for data is not a valid JSON string)
"""
def add_tag_to_user(email, tag):
    AUDIENCE_ID = os.environ["AUDIENCE_ID"]
    SUBSCRIBER_HASH = hashlib.md5(email.encode('utf-8')).hexdigest()

    request_kwargs = {
        "headers": {
            "Authorization": "Bearer " + os.environ["MC_KEY"],
            "Content-Type": "application/json" # technically not necessary to add
        },
        "data": json.dumps({"tags": [{"name": tag, "status": "active"}]})
    }

    endpoint = f"https://us4.api.mailchimp.com/3.0/lists/{AUDIENCE_ID}/members/{SUBSCRIBER_HASH}/tags"

    resp = requests.post(endpoint, **request_kwargs)

add_tag_to_user("foo@bar.baz", "Example Tag Name")