Heroku + Flask + LetsEncrypt Verification Step

views.py

#Vaguely follows this guide but with python http://collectiveidea.com/blog/archives/2016/01/12/lets-encrypt-with-a-rails-app-on-heroku/
@app.route('/.well-known/acme-challenge/<id>')
def acme_challenge(id):
	return "%s.%s" % (id, os.environ.get('ACME_CHALLENGE', 'ACME CHALLENGE VARIABLE IS NOT SET'))

Found this through google but couldn't get it to work, so I used this instead from https://medium.com/@ericwuehler/using-let-s-encrpyt-9175feb76632#.h10bxcywx:

@app.route('/.well-known/acme-challenge/<challenge>')
def letsencrypt_check(challenge):
    challenge_response = {
        "<challenge_token>":"<challenge_response>",
        "<challenge_token>":"<challenge_response>"
    }
    return Response(challenge_response[challenge], mimetype='text/plain')