Create a file called "tokens.py" with

TWITCH_CLIENT_ID = "client_id"
STEAM_KEY = "steam_key"
SUBREDDIT = "dota2"
USERNAME = "reddit_username"
PASSWORD = "reddit_pwd"
REDDIT_CLIENT_SECRET = "secret"
REDDIT_CLIENT_ID = "client_id"

Run script with:

python3 bot.py post_id