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A simple LinkFixerBot clone developed as a demonstration for anyone who is curious how a simple reddit bot might be coded. To kill this code, spam "Ctrl+C" until it catches the exception.
import praw # simple interface to the reddit API, also handles rate limiting of requests
import re
from collections import deque
from time import sleep
USERNAME = "Your username here"
PASSWORD = "Your password here"
USERAGENT = "Your useragent string here. It should include your /u/username as a courtesy to reddit"
r = praw.Reddit(USERAGENT)
r.login(USERNAME,PASSWORD) # necessary if your bot will talk to people
cache = deque(maxlen=200) # To make sure we don't duplicate effort
r_pat = re.compile(' r/[A-Za-z0-9]+')
u_pat = re.compile(' u/[A-Za-z0-9]+')
def check_condition(comment):
text = comment.body
broken = set(re.findall(r_pat, text))
broken.union( set(re.findall(u_pat, text)) )
condition = False
if broken:
condition = True
return condition, broken
def bot_action(c, links):
text = ''
for link in links:
text += "/" + link[1:] + "\n"
print, c.subreddit.display_name, c.submission.title
print text
running = True
while running:
all = r.get_all_comments(limit = None, url_data = {'limit':100})
for c in all:
if in cache:
bot_condition_met, parsed = check_condition(c)
if bot_condition_met:
bot_action(c, parsed)
except KeyboardInterrupt:
running = False
except praw.errors.APIException, e:
print "[ERROR]:", e
print "sleeping 30 sec"
except Exception, e: # In reality you don't want to just catch everything like this, but this is toy code.
print "[ERROR]:", e
print "blindly handling error"

dadler commented May 8, 2015

Nice example!

At line 40, shouldn't that be "continue" rather than "break" so it continues parsing other comments in all?

trex005 commented Sep 23, 2016

@dadler - No, once it reaches comments that are in your cache, it has already processed the rest in a previous loop.

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