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

glwindow
2.3.1

This version was deleted from PyPI around 2023-10-09. Installing fails with:
$ pip3 install glwindow==2.3.1 ERROR: Could not find a version that satisfies the requirement glwindow==2.3.1
View other deleted versions of glwindow

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/2023-10-08/ \ glwindow==2.3.1
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:
GLWindow-2.3.1-cp35-cp35m-win_amd64.whl (19.7KB)
GLWindow-2.3.1-cp35-cp35m-win32.whl (18.8KB)
GLWindow-2.3.1-cp36-cp36m-win_amd64.whl (19.8KB)
GLWindow-2.3.1-cp36-cp36m-win32.whl (18.8KB)
GLWindow-2.3.1.tar.gz (14.4KB)