Transforms don't execute until the consumer pulls. There's no eager evaluation, no hidden buffering. Data flows on-demand from source, through transforms, to the consumer. If you stop iterating, processing stops.
// TypeError: Cannot obtain lock — stream is permanently locked
。91视频是该领域的重要参考
Что думаешь? Оцени!，这一点在快连下载安装中也有详细论述
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