Write all Reddit comments for a submission to a file

get_reddit_comments.py

import sys
import argparse
import praw
from praw.models import MoreComments
import json

SUBMISSION = 'l79x17'

def main(arguments):

    parser = argparse.ArgumentParser(
        description=__doc__, formatter_class=argparse.RawDescriptionHelpFormatter)
    parser.add_argument('-s', '--submission',
                        help="Submission ID", default=SUBMISSION)
    parser.add_argument('-f', '--filename',
                        help="Filename", default=f'{SUBMISSION}.json')
    parser.add_argument('-a', '--app',
                        help="Reddit app name", required=True)
    parser.add_argument('-u', '--user',
                        help="Reddit username", required=True)
    parser.add_argument('-c', '--client',
                        help="Reddit app client ID", required=True)
    parser.add_argument('-e', '--secret',
                        help="Reddit app client ID secret", required=True)

    args = parser.parse_args(arguments)

    r = praw.Reddit(
        user_agent=f'{args.app} by {args.user}',
        client_id=args.client,
        client_secret=args.secret,
    )

    s = r.submission(args.submission)
    count = 0
    all_comments = []
    for c in s.comments:
        if isinstance(c, MoreComments):
            s.comments.replace_more()
            continue
        count += 1
        all_comments.append(c.body)
    print(count)
    with open(args.filename, 'w') as f:
        json.dump(all_comments, f)


if __name__ == '__main__':
    sys.exit(main(sys.argv[1:]))