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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def unfinished(finished_status, update_interval, status_key, edit_at_key):
 """ Create dict query for pymongo that getting all unfinished task. :param finished_status: int, status code that less than this will be considered as unfinished. :param update_interval: int, the record will be updated every x seconds. :param status_key: status code field key, support dot notation. :param edit_at_key: edit_at time field key, support dot notation. :return: dict, a pymongo filter. **中文文档** 状态码小于某个值, 或者, 现在距离更新时间已经超过一定阈值. """

    return {
        "$or": [
            {status_key: {"$lt": finished_status}},
            {edit_at_key: {"$lt": x_seconds_before_now(update_interval)}},
        ]
    }