sendTweet.py

class SendTweet(webapp.RequestHandler):
    def post(self):
        self.response.headers['Content-Type'] = 'text/plain'
        tweet = cgi.escape(self.request.get('content')) + "duhhh"
        username =  "username"
        login =  username
        password = "password"
        payload= {'status' : tweet,  'source' : "GAE script"}
        payload= urllib.urlencode(payload)
        base64string = base64.encodestring('%s:%s' % (login, password))[:-1]
        headers = {'Authorization': "Basic %s" % base64string}

        url = "http://twitter.com/statuses/update.xml"
        result = urlfetch.fetch(url, payload=payload, method=urlfetch.POST, headers=headers)

        self.response.out.write(result.content)

    def get_tweet(self):

        tweet = "this is a tweet"
        return tweet