fileinfos = FileInfo.all().filter("category =", "eyes")
    fileinfo = fileinfos[random.randint(0, fileinfos.count()-1)]
    url = images.get_serving_url(str(fileinfo.blob.key()), size=420)
    fileinfos = FileInfo.all().filter("category =", "nose")
    fileinfo2 = fileinfos[random.randint(0, fileinfos.count()-1)]
    url2 = images.get_serving_url(str(fileinfo2.blob.key()), size=420)
    fileinfos = FileInfo.all().filter("category =", "mouth")
    fileinfo3 = fileinfos[random.randint(0, fileinfos.count()-1)]
    url3 = images.get_serving_url(str(fileinfo3.blob.key()), size=420)

def get_memcached_serving_url(fileinfo):
        from google.appengine.api import memcache
        memcache_key = "blob_%d" % fileinfo.blob.key()
        data = memcache.get(memcache_key)
        if data is not None:
            return data

def get_random_image(self, category):
    fileinfos = FileInfo.all().filter("category =", category)
    return fileinfos[random.randint(0, fileinfos.count()-1)]

def get(self):
    eyes_image = self.get_random_image(category="eyes")
    nose_image = self.get_random_image(category="nose")
    mouth_image = self.get_random_image(category="mouth")

    eyes_url = images.get_serving_url(str(eyes_image.blob.key()), size=420)
    nose_url = images.get_serving_url(str(nose_image.blob.key()), size=420)
    mouth_url = images.get_serving_url(str(mouth_image.blob.key()), size=420)

    self.render(u'cyberfaze', eyes_image=eyes_image, eyes_url=eyes_url, nose_image=nose_image, nose_url=nose_url, mouth_image=mouth_image, mouth_url=mouth_url, form_url = blobstore.create_upload_url('/upload'),)

<a href="/file/{{eyes_image.key.id}}"><img src="{{eyes_url}}"></a><br>
<a href="/file/{{nose_image.key.id}}"><img src="{{nose_url}}"></a><br>
<a href="/file/{{mouth_image.key.id}}"><img src="{{mouth_url}}"></a>

fileinfos = FileInfo.all().filter("category =", "eyes")
fileinfo = fileinfos[random.randint(0, fileinfos.count()-1)]
url = images.get_serving_url(str(fileinfo.blob.key()), size=420)

def get_random_image_url(category)
    fileinfos = FileInfo.all().filter("category =", category)
    fileinfo = fileinfos[random.randint(0, fileinfos.count()-1)]
    return images.get_serving_url(str(fileinfo.blob.key()), size=420)

eyes_url = get_random_image_url("eyes")
nose_url = get_random_image_url("nose")
mouth_url = get_random_image_url("mouth")