Simple Recaptcha validation method when using Google App Engine (GAE), Webapp2 [Updated]

recaptcha_validate.py

from google.appengine.api import urlfetch
from urllib import urlencode
import json

def validate_captcha(self):
    recaptcha_response_field = self.request.params.get("g-recaptcha-response")
    remote_ip = self.request.remote_addr
    secret = 'YOUR SECRET HERE' # put recaptcha private key here

    recaptcha_post_data = {
        "secret":  secret,
        "remoteip": remote_ip,
        "response": recaptcha_response_field}

    response = urlfetch.fetch(url='https://www.google.com/recaptcha/api/siteverify',
                              payload=urlencode(recaptcha_post_data), method="POST")
    response = json.loads(response.content)
    return response['success']