A bot to check the source of an image on the site saucenao.com
When tagged it searches the image/video on saucenao and replies with the result. It also automatically replies to all new posts on certain subreddits.
Comment u/sauceNAOcheckbot in the respective image and it will reply.
To run the bot yourself you will have to put your login information in the program as per the praw documention and register your bot in reddit.com/prefs/apps
I used praw to get and reply to comments on reddit and used requests and BeautifulSoup to post image url and parse the html.