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

fastdup
1.48

This version was deleted from PyPI around 2023-12-24. Installing fails with:
$ pip3 install fastdup==1.48 ERROR: Could not find a version that satisfies the requirement fastdup==1.48
View other deleted versions of fastdup

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/2023-12-23/ \ fastdup==1.48
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:
fastdup-1.48-cp37-cp37m-manylinux_2_31_x86_64.whl (71.7MB)
fastdup-1.48-cp38-cp38-manylinux_2_31_x86_64.whl (71.7MB)
fastdup-1.48-cp39-cp39-manylinux_2_31_x86_64.whl (71.7MB)
fastdup-1.48-cp310-cp310-manylinux_2_31_x86_64.whl (71.7MB)