earthtrip

<label>Verify you're human:</label> 
<script type="text/javascript" src="http://www.google.com/recaptcha/api/challenge?k=YOUR_RECAPTCH_PUBLIC_KEY_HERE">
</script>
<noscript>
  <iframe src="http://www.google.com/recaptcha/api/noscript?k=YOUR_RECAPTCH_PUBLIC_KEY_HERE" height="300" width="500" frameborder="0"></iframe><br>
  <textarea name="recaptcha_challenge_field" rows="3" cols="40">
  </textarea>
 <input type="hidden" name="recaptcha_response_field" value="manual_challenge">
</noscript>

earthtrip

  def validate_captcha(self, form):
    recaptcha_challenge_field = self.request.get("recaptcha_challenge_field")
    recaptcha_response_field = self.request.get("recaptcha_response_field")
    remote_ip = self.request.remote_addr
    recaptcha_private_key = 'MY_PRIVATE_KEY' # put recaptcha private key here

    recaptcha_post_data = {"privatekey":  recaptcha_private_key,
        "remoteip": remote_ip,
        "challenge": recaptcha_challenge_field,
        "response": recaptcha_response_field}