# \#pipeline

**URL:** https://discourse.vtk.org/tag/pipeline/28.md

[Latest](https://discourse.vtk.org/latest.md) · [Categories](https://discourse.vtk.org/categories.md) · [Tags](https://discourse.vtk.org/tags.md)

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## [How to propagate non-VTK data in the pipeline in a simple way?](https://discourse.vtk.org/t/how-to-propagate-non-vtk-data-in-the-pipeline-in-a-simple-way/16472)

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**Author:** [@CsatiZoltan](https://discourse.vtk.org/u/CsatiZoltan)\
**Replies:** 4\
**Last updated:** [June 23, 2026, 10:50pm UTC](https://discourse.vtk.org/t/how-to-propagate-non-vtk-data-in-the-pipeline-in-a-simple-way/16472 "2026-06-23T22:50:53Z")

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I have a ParaView reader plugin in Python, which stores the path to the opened file. I want to implement various operations on the file that was read by the reader. So I write one filter for each operation. This way, I h…

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## [Am I misunderstanding how VTK uses vtkInformation in pipelines?](https://discourse.vtk.org/t/am-i-misunderstanding-how-vtk-uses-vtkinformation-in-pipelines/14248)

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**Author:** [@scotsman60](https://discourse.vtk.org/u/scotsman60)\
**Replies:** 4\
**Last updated:** [July 17, 2024, 4:29pm UTC](https://discourse.vtk.org/t/am-i-misunderstanding-how-vtk-uses-vtkinformation-in-pipelines/14248 "2024-07-17T16:29:45Z")

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Hello!!! I’m trying to use vtkInformation to share “metadata” between items in a vtk pipeline. I’m pretty comfortable setting/getting the keys, values etc., but I’ve demonstrated some behavior that surprised me and I’d …

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## [Introduce \`vtkForEach\` filter](https://discourse.vtk.org/t/introduce-vtkforeach-filter/12448)

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**Author:** [@Charles\_Gueunet](https://discourse.vtk.org/u/Charles_Gueunet)\
**Replies:** 6\
**Last updated:** [February 1, 2024, 4:01pm UTC](https://discourse.vtk.org/t/introduce-vtkforeach-filter/12448 "2024-02-01T16:01:34Z")

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This post presents a new vtkForEach filter. Included in Common/Execution model, this is a filter of a new kind, operating at the pipeline level. Its general purpose is to create a loop on a sub-pipeline part. It is heavi…