script to export all slack emoji

backup_slack_emoji.py

import concurrent.futures
import json
import os.path
import urllib.request

token = '...'

url = f'https://slack.com/api/emoji.list?token={token}'

resp = urllib.request.urlopen(url)
emojis = json.load(resp)

n = len(emojis['emoji'])

def dl_emoji(k, v):
    if not v.startswith('https://'):
        with open(f'data/{k}.alias', 'w') as f:
            f.write(f'{v}\n')
    else:
        for i in range(4):
            try:
                resp = urllib.request.urlopen(v)
            except Exception:
                print(f'...retry {k} ({i})')
                continue
            _, ext = os.path.splitext(v)
            with open(f'data/{k}{ext}', 'wb') as f:
                f.write(resp.read())
            return

with concurrent.futures.ThreadPoolExecutor(10) as tp:
    futures = [tp.submit(dl_emoji, k, v) for k, v in emojis['emoji'].items()]

    for i, _ in enumerate(concurrent.futures.as_completed(futures)):
        if i % 100 == 1:
            print(f'{i} / {n}...')