Reddit bot for mods who want to remove all comments in removed threads

RedditRemoveAll.py

import praw
import OAuth2Util

# Your username. Not the username of the bot
USERNAME = ""
SUBREDDIT = ""

# Post limit chooses how far to look back in /about/spam
# Comment limit chooses the max amount of MoreComments to 
# load if they aren't originally loaded in the post
# Leave it to None if there is no issue with speed.
POSTLIMIT = None
COMMENTLIMIT = None

# If you are automating this task via a CRON job or Windows
# Task Scheduler, keep the following value True. Otherwise,
# set it to false for the script to automate itself.

CRONJOB = True

try:
    import botconfig
except ImportError:
    pass

try: 
    USERNAME = botconfig.USERNAME
    SUBREDDIT = botconfig.SUBREDDIT
except AttributeError:
    pass

USERNAME.replace("/u/", "")
USERNAME.replace("/U/", "")
USERNAME.replace("u/", "")
USERNAME.replace("U/", "")
SUBREDDIT.replace("/r/", "")
SUBREDDIT.replace("/R/", "")
SUBREDDIT.replace("r/", "")
SUBREDDIT.replace("R/", "")

if USERNAME == "" or SUBREDDIT == "":
    raise NameError('You must fill out the username and subreddit fields.') 

USERAGENT = "A script to remove all comments on removed posts on /r/{0} for /u/{1}".format(SUBREDDIT, USERNAME)

if USERNAME != "13steinj"
    USERAGENT += " by /u/13steinj"

def main():
    sub = r.get_subreddit(SUBREDDIT)
    spammed = sub.get_spam(limit=LIMIT)
    for x in spammed:
        if isinstance(x, praw.objects.Comment)
            continue
        x.replace_more_comments(limit=COMMENTLIMIT, threshold=0)
        comments = praw.helpers.flatten_tree(x.comments)
        for y in comments:
            if y.distinguished != None:
                continue
            y.remove()

if __name__ == '__main__':
    r = praw.Reddit(USERAGENT)
    o = OAuth2Util.OAuth2Util(r)
    if CRONJOB == True:
        o.refresh()
        try:
            main()
        except KeyboardInterrupt:
            raise
    elif CRONJOB == False:
        o.refresh(force=True)
        while CRONJOB == False:
            try:
                main()
            except KeyboardInterrupt:
                raise