A python script to go through a list of subreddits, grab the hot 25 threads of each one, and crawl every comment with positive karma, while creating a json list of users who met the criteria.

skrapr.py

import praw

client_id = 'XXXXXXXX'
client_secret = 'XXXXXXXX'
refresh_token = 'XXXXXXXX'

reddit = praw.Reddit(client_id=client_id, client_secret=client_secret, refresh_token=refresh_token user_agent='Skrapr')

crawl_subreddits = ['sub1', 'sub2', 'sub3']

user_list = []
count = 0

for sub in crawl_subreddits:
  print('Searching in r/' + str(sub))
  try:
    subreddit = reddit.subreddit(sub)
    for submission in subreddit.hot(limit=25):
      try:
        count += 1
        user_list.append(submission.author)
        print('Users found: ' + str(count))
        submission.comments.replace_more(limit=0)
        all_comments = submission.comments.list()
        for single_comment in all_comments:
          try:
            if single_comment.score > 0:
              count += 1
              user_list.append(single_comment.author)
              print('Users found: ' + str(count))
          except Exception as e:
            print('Error: ' + str(e))
            continue
      except Exception as e:
        print('Error: ' + str(e))
        continue
  except Exception as e:
    print('Error: ' + str(e))
    continue

print('Removing duplicate users...')
user_list = list(set(user_list))
print('Found ' + str(len(user_list)) + ' unique users.')

json_list = []
for usr in user_list:
  json_list.append('"' + str(usr) + '":{"color":"yellow","tag":"Tag!"}')

userlist = open('users.json', 'wb')
userlist.write("{" + ",".join(json_list) + "}")
userlist.close()