RedditUserHistory.py

import os
import datetime
import praw

reddit = praw.Reddit(
	client_id='...',
	client_secret='...',
	user_agent='RedditUserHistory.py',
	username='...',
	password='...'
)

username = 'Zren'
user = reddit.redditor(username)

os.makedirs('./{}/'.format(username), exist_ok=True)

for comment in user.comments.new(limit=None):
	created_dt = datetime.datetime.utcfromtimestamp(comment.created_utc)
	print(created_dt, comment.subreddit)
	filepath = "{}/{}.log".format(username, comment.subreddit)
	with open(filepath, "a") as fout:
		text = comment.permalink + '\n'
		text += comment.body + '\n'
		text += '\n\n\n'
		fout.write(text)