human
I wrote the below code

    global _worker_id
    with counter.get_lock():
        counter.value += 1
        _worker_id = counter.value
    '\n                You    can    now    use    _worker_id.\n                '
    test_classes.API_KEYS = {}
    from zerver.lib.cache import get_cache_backend
    cache = get_cache_backend(None)
    cache.clear()
    connections.close_all()
    destroy_test_databases(_worker_id)
    create_test_databases(_worker_id)
    settings.LOCAL_UPLOADS_DIR = '{}_{}'.format(settings.LOCAL_UPLOADS_DIR, _worker_id)
    def is_upload_avatar_url(url):
        if (url.regex.pattern == '^user_avatars/(?P<path>.*)$'):
            return True
        return False
    from zproject import dev_urls
    found = False
    for url in dev_urls.urls:
        if is_upload_avatar_url(url):
            found = True
            new_root = os.path.join(settings.LOCAL_UPLOADS_DIR, 'avatars')
            url.default_args['document_root'] = new_root
    if (not found):
        print('***    Upload    directory    not    found.')

What's a good function header?

=====
Here's a good function header?
assistant
#Here's a good function header.

def init_worker(counter):