bot.py

import praw
import config
import random
import os
import time

def bot_login():
    print "Logging in..."
    r = praw.Reddit(username = config.username,
            password = config.password,
            client_id = config.client_id,
            client_secret = config.client_secret,
            user_agent = "kemonomimi bot v0.1")
    print "Logged in!"

    return r

def run_bot(r, comments_replied_to, catgirls):
    print catgirls
    print "Obtaining 25 comments..."

    for comment in r.subreddit('KemonomimiCheerUpBot').comments(limit=25):
        if ("Im sad" in comment.body and comment.id not in comments_replied_to
                and comment.author != r.user.me()):

            comment.reply("[Here](" + random.choice(catgirls) + ") is a"
                          "picture of a catgirl! Hopefully this will cheer you"
                          "up!"
                          "\n\n"
                          "---"
                          "\n\n"
                          "I am a bot. For more info on me and how to use me,"
                          "see r/KemonomimiCheerUpBot")

            comments_replied_to.append(comment.id)

            with open("comments_replied_to.txt", "a") as f:
                f.write(comment.id + "\n")

    time.sleep(10)

# Load catgirls from a file (defaults to catgirls.txt)
def get_catgirls(fname='catgirls.txt'):

    if not os.path.isfile(fname):
        raise FileNotFoundError("Can't get catgirls from " + fname)

    catgirls = []

    with open(fname) as catgirls_file:
        catgirls_contents = catgirls_file.read()

    catgirls = catgirls_contents.split("\n")
    catgirls = filter(None, catgirls)

    catgirls = [catgirl.strip() for catgirl in catgirls]

    return catgirls

def get_saved_comments():

    if not os.path.isfile("comments_replied_to.txt"):
        comments_replied_to = []
    else:
        with open("comments_replied_to.txt", "r") as f:
            comments_replied_to = f.read()
            comments_replied_to = comments_replied_to.split("\n")
            comments_replied_to = filter(None, comments_replied_to)

    return comments_replied_to


if __name__ == '__main__':

    r = bot_login()
    catgirls = get_catgirls()
    comments_replied_to = get_saved_comments()

    while True:
        run_bot(r, comments_replied_to, catgirls)