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.
Москвичей предупредили о резком похолодании09:45
。Line官方版本下载是该领域的重要参考
urls, next_url = self.parser.parse_list(html)
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