Scrape user names from reddit thread

comment_scrape.py

#!/usr/bin/python
# -*- coding: utf-8 -*-

import praw

# PRAW ident
ua = '/u/someone for /r/somesub'
r = praw.Reddit(user_agent=ua)

# Fetch thread contents where submission_id is found at
# reddit.com/r/somesub/comments/submission_id/the_post_title_yay
thread = r.get_submission(submission_id='xxxxxx')
thread.replace_more_comments(limit=None, threshold=0)
flat_list = praw.helpers.flatten_tree(thread.comments)

# Ignore deleted comments and dupes and write out user names
authors = []

with open('thread.csv', 'w') as f:
    for thing in flat_list:
        if thing.author is not None and thing.author.name not in authors:
            authors.append(thing.author.name)
            f.write(thing.author.name)
            f.write('\n')