从官网下载 nuscenes 数据集，解压后把 expansion 文件夹放到 maps 下，
Digital Rights Watch digitalrightswatch.org.au🇦🇺
，这一点在服务器推荐中也有详细论述
This is better in that there is far less boilerplate, but it doesn't solve everything. Async iteration was retrofitted onto an API that wasn't designed for it, and it shows. Features like BYOB (bring your own buffer) reads aren't accessible through iteration. The underlying complexity of readers, locks, and controllers are still there, just hidden. When something does go wrong, or when additional features of the API are needed, developers find themselves back in the weeds of the original API, trying to understand why their stream is "locked" or why releaseLock() didn't do what they expected or hunting down bottlenecks in code they don't control.。关于这个话题，safew官方版本下载提供了深入分析
</dependency。im钱包官方下载对此有专业解读