extraction_script/extract_title_selftext.py

import json
import gzip
import sys
import re
import tqdm
from collections import defaultdict
import logging



def clean_text(text):
    text = text.strip()
    text = re.sub(r'\[(.*)\]\(.*\)', '\g<1>', text) #Markdown
    text = re.sub(r'http[s]?://(?:[a-zA-Z]|[0-9]|[$-_@.&+]|[!*\(\),]|(?:%[0-9a-fA-F][0-9a-fA-F]))+', '', text) # URLs
    return text


for line in tqdm.tqdm(sys.stdin):
    try:
        data = json.loads(line)
        if 'title' in data and 'selftext' in data and 'num_comments' in data:
            title = clean_text(data['title'])
            selftext = clean_text(data['selftext'])
            num_comments = data['num_comments']
            score = data['score']
            subreddit = data['subreddit'] if 'subreddit' in data else ''

            if 'upvote_ratio' in data and float(data['upvote_ratio']) < 0.5:
                continue
                
            
            
            if len(title) > 25 and len(title)+25 < len(selftext) < 4096 and (score >= 3 or num_comments >= 3):
                print(json.dumps({'title': title, 'body': selftext, 'subreddit': subreddit}))
                

                    
    except:
        logging.warning("exception")