python - 不和谐、粗暴、阻塞

Question

所以我正在 python 上编写不和谐的机器人，我想创建一个后台任务来检查 subreddit 中是否有新提交的内容，并在有一定天赋的情况下发布它。但是当我尝试启动我的机器人时，它以前运行得很好，它只是等待一些东西并且不会启动。我该怎么办？

async def reddit_task():
        await bot.wait_until_ready()
        start_time = time.time()
        reddit = praw.Reddit(different keys)
        subreddit = reddit.subreddit('certain subreddit')
        for submission in subreddit.stream.submissions():
            if submission.created_utc > start_time:
                if submission.link_flair_text == 'certain flair':
                    em = discord.Embed(title=submission.title+'\n'+submission.shortlink)
                    if len(submission.preview) > 1:
                            em.set_image(url=submission.preview['images'][0]['source']['url'])
                    await bot.send_message(discord.Object(id='my channel id'), embed=em)

            else:
                pass

if __name__ == "__main__":
    for extension in startup_extensions:
        try:
            bot.load_extension(extension)
        except Exception as e:
            exc = '{}: {}'.format(type(e).__name__, e)
            print('Failed to load extension {}\n{}'.format(extension, exc))
    bot.loop.create_task(reddit_task())
    bot.run(config.bot_beta_token)

Answer 1

我也遇到了这个问题，因为 subreddit.stream.submissions() 阻塞了 for 循环。所以我通过使用无限循环和 subreddit.stream.submissions(pause_after=0) 解决了这个问题，因此如果没有新帖子，它会返回 None 然后等待 60 秒再检查再次。

async def reddit_task():
    await client.wait_until_ready()
    start_time = time.time()

    reddit = praw.Reddit("<client_stuff>")
    subreddit = reddit.subreddit("<some_subreddit>")
    submissions = subreddit.stream.submissions(pause_after=0)

    while not client.is_closed:
        submission = next(submissions)

        if submission is None:
            # Wait 60 seconds for a new submission
            await asyncio.sleep(60)

        elif submission.created_utc > start_time:
            <do_stuff_with_submission>