Stats:

This file contains Reddit comments for September, 2018. There are four quarantined subreddits included in this dump: ice_poseidon, cringeanarchy, theredpill and braincels. I decided to include these in the standard dump since they were a part of previous dumps for a long time and they represent four of the largest subreddits quarantined to date by Reddit.

Python example of reading data (read_data.py):

#!/usr/bin/env python3

import ujson as json
import sys

for line in sys.stdin:
    # obj is a dict object representing the comment data
    obj = json.loads(line)  
    print(obj['subreddit'],obj['author'],obj['score'],sep=',')

Linux Command line to process the first 1,000 comments:
xz -cd RC_2018-09.xz | head -n 1000 | ./read_data.py