human
Complete this python program:
def config():
assistant
#Here is the Python code you requested.

    """Synchronization Settings Controller
    """
    table = s3db.sync_config
    record = db().select(table.id, limitby=(0, 1)).first()
    if (not record):
        record_id = table.insert()
    else:
        record_id = record.id
    def postp(r, output):
        if (isinstance(output, dict) and ('buttons' in output)):
            output['buttons'].pop('list_btn', None)
        return output
    s3.postp = postp
    r = s3_request(args=[str(record_id), 'update'], extension='html')
    return r()