# 9.1.0 is out

**URL:** https://discourse.vtk.org/t/9-1-0-is-out/7084
**Category:** Announcements
**Tags:** release-process
**Created:** [November 5, 2021, 2:59pm UTC](https://discourse.vtk.org/t/9-1-0-is-out/7084 "2021-11-05T14:59:34Z")
**Posts on this page:** 5
**Page:** 1

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### Author: ![ben.boeckel](https://discourse.vtk.org/letter_avatar_proxy/v4/letter/b/ea5d25/32.png) [@ben.boeckel](https://discourse.vtk.org/u/ben.boeckel)
#### Post date: [November 5, 2021, 2:59pm UTC](https://discourse.vtk.org/t/9-1-0-is-out/7084/1 "2021-11-05T14:59:34Z")

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Hi all,

9.1.0 is out on PyPI, the repository, and the website. Changes since rc4 include some `FindHDF5` fixes, missing includes, and new CMake policy warning changes. Release notes can be found [here](https://gitlab.kitware.com/vtk/vtk/-/blob/master/Documentation/release/9.1.md).

The next big release (9.2) is scheduled to branch in early March with a final release in early April.

Thanks to all that have contributed,

–Ben

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### Author: ![mwestphal](https://discourse.vtk.org/user_avatar/discourse.vtk.org/mwestphal/32/19_2.png) [@mwestphal](https://discourse.vtk.org/u/mwestphal)
#### Post date: [November 5, 2021, 3:02pm UTC](https://discourse.vtk.org/t/9-1-0-is-out/7084/2 "2021-11-05T15:02:03Z")

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Awesome !

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### Author: ![beijihuohu](https://discourse.vtk.org/user_avatar/discourse.vtk.org/beijihuohu/32/4209_2.png) [@beijihuohu](https://discourse.vtk.org/u/beijihuohu)
#### Post date: [November 7, 2021, 3:28am UTC](https://discourse.vtk.org/t/9-1-0-is-out/7084/3 "2021-11-07T03:28:14Z")

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There is a question,We linked the vtkFilterExtraction-8.2.lib(for example) to our application and find the relation between the head file and the library file with directory structure easily，but i can’t get the vtkFilterExtraction-9.1.lib by compiling the vtk 9.1.0.How i can include the head file and linked the right library?

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### Author: ![beijihuohu](https://discourse.vtk.org/user_avatar/discourse.vtk.org/beijihuohu/32/4209_2.png) [@beijihuohu](https://discourse.vtk.org/u/beijihuohu)
#### Post date: [November 7, 2021, 4:18am UTC](https://discourse.vtk.org/t/9-1-0-is-out/7084/4 "2021-11-07T04:18:38Z")

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I’m sorry,If enable the Kit option,you will get the vtkFilterExtraction-9.1.lib

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### Author: ![dgobbi](https://discourse.vtk.org/user_avatar/discourse.vtk.org/dgobbi/32/18_2.png) [@dgobbi](https://discourse.vtk.org/u/dgobbi)
#### Post date: [November 8, 2021, 1:11pm UTC](https://discourse.vtk.org/t/9-1-0-is-out/7084/5 "2021-11-08T13:11:02Z")

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For 9.1, I added a new [Python Wrappers](https://vtk.org/doc/nightly/html/md__builds_gitlab_kitware_sciviz_ci_Documentation_Doxygen_PythonWrappers.html) doxygen page that describes some of the obscure features of the Python wrappers. In the [Experimental Features](https://vtk.org/doc/nightly/html/md__builds_gitlab_kitware_sciviz_ci_Documentation_Doxygen_PythonWrappers.html#experimental-features) it describes how to install .pyi stubs files that describe VTK’s Python API. These pyi stubs might be useful to people who use IDEs that can pull hints from them.