handlers.py 文件源码

def get(self):
        cached = memcache.get('worst_hashtags')
        if cached:
            self.response.out.write(cached)
        else:
            response_writer = csv.writer(
                self.response, delimiter=',', quoting=csv.QUOTE_ALL)

            # Instruct endpoint to cache for 1 day.
            self.response.headers['Cache-control'] = 'public, max-age=86400'

            c = Counter()
            for s in Score.query().order(-Score.score).iter(
                        limit=5000, projection=(Score.hashtags)):
                if s.hashtags is not None:
                    c.update((h.lower() for h in s.hashtags))
            for tag, tag_count in c.most_common(100):
                response_writer.writerow(
                    [tag, tag_count])
            memcache.set('worst_hashtags', self.response.text, 86400)