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

acu
0.2.1

This version was deleted from PyPI around 2023-09-23. Installing fails with:
$ pip3 install acu==0.2.1 ERROR: Could not find a version that satisfies the requirement acu==0.2.1
View other deleted versions of acu

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/2023-09-22/ \ acu==0.2.1
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:
ACU-0.2.1-py3-none-any.whl (3.2KB)
ACU-0.2.1.tar.gz (2.2KB)