get_wallpaper.py

import praw, subprocess
SUBREDDIT = "wallpapers"
r = praw.Reddit(client_id="",
                client_secret="",
                user_agent="WallpaperGrabber by /u/ParanoidBox")
allowedFormats = ['jpg', 'png']
urls = [post.url for post in r.subreddit(SUBREDDIT).hot() if post.url.split(".")[-1] in allowedFormats]
subprocess.call(['feh', "--bg-fill", urls[0])

I was thinking. Wouldn't it be better if we were to limit the number of posts praw grabs using r.subreddit(SUBREDDIT).hot(limit=5)?
It has the potential of failing if we use a lower limit, because if the post doesn't contain a link to an image (if it doesn't end in .jpg, or .png), there's nothing to send to feh.
I think praw will actually forward this to the api endpoint and only ask it for five posts, so we're not just moving the "getting the first item of the list" upstream.