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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Get arrays from different stages","articleBody":"I am using PDAL for loading and processing pointclouds into a python script. Hence I am not really using the writers and just reading the pipeline's array after applying the filters. \r\nIn this [reply](https://github.com/PDAL/PDAL/issues/2311#issuecomment-446971273), it is stated, that it's possible to have multiple writers in a pipeline. But is it also possible to grab the arrays from mutliple stages of the pipeline when using the python extension? Or, during processing, to enforce storage of a apecific array?\r\nSpecifically, i am applying a range filter to the classification. And if the result has too few points, I would like to grab the array before filtering to continue processing with that.","author":{"url":"https://github.com/rettenda","@type":"Person","name":"rettenda"},"datePublished":"2022-11-11T08:23:31.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/138/python/issues/138"}