You're looking at StableBuild's Deleted PyPI mirror - where we index all deleted packages from the Python package registry.

klayout
0.29.11

This version was deleted from PyPI around 2025-08-08. Installing fails with:
$ pip3 install klayout==0.29.11 ERROR: Could not find a version that satisfies the requirement klayout==0.29.11
View other deleted versions of klayout

Install through StableBuild

You can install this package from StableBuild's PyPI snapshots from before the version was deleted:
pip3 install \ -i https://YOUR_API_KEY.pypimirror.stablebuild.com/2025-08-07/ \ klayout==0.29.11
Sign up for StableBuild to get an API key (it's free and takes <60 seconds!)

Or, download files manually

And install manually via pip:
klayout-0.29.11-cp36-cp36m-win_amd64.whl (12.3MB)
klayout-0.29.11-cp36-cp36m-win32.whl (10.6MB)
klayout-0.29.11-cp37-cp37m-win_amd64.whl (11.9MB)
klayout-0.29.11-cp37-cp37m-win32.whl (10.4MB)
klayout-0.29.11-cp38-cp38-macosx_10_9_x86_64.whl (19.0MB)
klayout-0.29.11-cp38-cp38-macosx_11_0_arm64.whl (17.3MB)
klayout-0.29.11-cp38-cp38-manylinux_2_17_x86_64.manylinux2014_x86_64.whl (22.7MB)
klayout-0.29.11-cp38-cp38-musllinux_1_2_x86_64.whl (23.8MB)
klayout-0.29.11-cp38-cp38-win_amd64.whl (11.9MB)
klayout-0.29.11-cp38-cp38-win32.whl (10.4MB)
klayout-0.29.11-cp39-cp39-macosx_10_9_x86_64.whl (19.0MB)
klayout-0.29.11-cp39-cp39-macosx_11_0_arm64.whl (17.3MB)
klayout-0.29.11-cp39-cp39-manylinux_2_17_x86_64.manylinux2014_x86_64.whl (22.7MB)
klayout-0.29.11-cp39-cp39-musllinux_1_2_x86_64.whl (23.8MB)
klayout-0.29.11-cp39-cp39-win_amd64.whl (11.9MB)
klayout-0.29.11-cp39-cp39-win32.whl (10.4MB)
klayout-0.29.11-cp310-cp310-macosx_10_9_x86_64.whl (19.0MB)
klayout-0.29.11-cp310-cp310-macosx_11_0_arm64.whl (17.3MB)
klayout-0.29.11-cp310-cp310-manylinux_2_17_x86_64.manylinux2014_x86_64.whl (22.7MB)
klayout-0.29.11-cp310-cp310-musllinux_1_2_x86_64.whl (23.8MB)
klayout-0.29.11-cp310-cp310-win_amd64.whl (11.9MB)
klayout-0.29.11-cp310-cp310-win32.whl (10.4MB)
klayout-0.29.11-cp311-cp311-macosx_10_9_x86_64.whl (19.0MB)
klayout-0.29.11-cp311-cp311-macosx_11_0_arm64.whl (17.3MB)
klayout-0.29.11-cp311-cp311-manylinux_2_17_x86_64.manylinux2014_x86_64.whl (22.7MB)
klayout-0.29.11-cp311-cp311-musllinux_1_2_x86_64.whl (23.8MB)
klayout-0.29.11-cp311-cp311-win_amd64.whl (11.9MB)
klayout-0.29.11-cp311-cp311-win32.whl (10.4MB)
klayout-0.29.11-cp312-cp312-macosx_10_13_x86_64.whl (18.7MB)
klayout-0.29.11-cp312-cp312-macosx_11_0_arm64.whl (17.3MB)
klayout-0.29.11-cp312-cp312-manylinux_2_17_x86_64.manylinux2014_x86_64.whl (22.7MB)
klayout-0.29.11-cp312-cp312-musllinux_1_2_x86_64.whl (23.8MB)
klayout-0.29.11-cp312-cp312-win_amd64.whl (11.9MB)
klayout-0.29.11-cp312-cp312-win32.whl (10.4MB)
klayout-0.29.11-cp313-cp313-macosx_10_13_x86_64.whl (18.7MB)
klayout-0.29.11-cp313-cp313-macosx_11_0_arm64.whl (17.3MB)
klayout-0.29.11-cp313-cp313-manylinux_2_17_x86_64.manylinux2014_x86_64.whl (22.7MB)
klayout-0.29.11-cp313-cp313-musllinux_1_2_x86_64.whl (23.8MB)
klayout-0.29.11-cp313-cp313-win_amd64.whl (11.9MB)
klayout-0.29.11-cp313-cp313-win32.whl (10.4MB)
klayout-0.29.11.tar.gz (3.6MB)