从asyncpraw subreddit生成器对象中选择随机发布？

Question

(不和谐机器人的异步Python内容)

通过asyncpraw使用reddit API

我正在调用reddit API并返回子reddit的十个热门帖子。

hot_posts = returned_subreddit.hot(limit=10)

哪个打印<asyncpraw.models.listing.generator.ListingGenerator object at 0x0000021B3CC1A3A0>

这个对象可以遍历，并且可以使用不同的属性。例如：

async for submission in hot_posts:
    print(submission.title)
    print(submission.score)
    print(submission.id)
    print(submission.url)

我想知道如何从这个生成器对象中选择一个随机提交。目标是让我的discord机器人发送一条消息来响应命令。该消息将包含一个链接，指向给定子subreddit上排名前十的热门帖子之一。

我尝试过通过索引访问它，例如抛出TypeError: 'ListingGenerator' object is not subscriptable的hot_posts[3]

到目前为止，我尝试使用random库：

choice(hot_posts)结果：TypeError: object of type 'ListingGenerator' has no len()

random.sample(hot_posts, k=1)结果：TypeError: Population must be a sequence. For dicts or sets, use sorted(d).

文档：

https://asyncpraw.readthedocs.io/en/latest/code_overview/models/subreddit.html

https://asyncpraw.readthedocs.io/en/latest/code_overview/other/listinggenerator.html#asyncpraw.models.ListingGenerator

Answer 1

我已经解决了这个问题，可能非常不完美。上面问题的答案是让我自己了解生成器对象，它们如何使用yield，以及它们是如何不可迭代的，应该消费到一个随机的停止点，或者消费到一个列表中，然后从列表中随机选择。

    @commands.command()
    async def r(self, ctx, subreddit: str=""):
        async with ctx.channel.typing():
            if self.reddit:
                chosen_subreddit = REDDIT_ENABLED_MEME_SUBREDDITS[0]
                if subreddit:
                    if subreddit in REDDIT_ENABLED_MEME_SUBREDDITS:
                        chosen_subreddit = subreddit
                sub = await self.reddit.subreddit(chosen_subreddit)
                submission_list = [submission async for submission in sub.hot(limit=20) if not submission.stickied and not submission.over_18 and not submission.spoiler]
                selector = randint(0, len(submission_list) - 1)
                post = submission_list[selector]
                await ctx.send(f"{post.url}\n<https://www.reddit.com{post.permalink}>")
            else:
                await ctx.send("This is not working.")