Reddit praw - Comment and Submission stream at once

init.py

def submissions_and_comments(subreddit, **kwargs):
    results = []
    results.extend(subreddit.new(**kwargs))
    results.extend(subreddit.comments(**kwargs))
    results.sort(key=lambda post: post.created_utc, reverse=True)
    return results

subreddit = r.subreddit('redditdev')
stream = praw.models.util.stream_generator(lambda **kwargs: submissions_and_comments(subreddit, **kwargs))

for post in stream:
    ...