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

bttc
0.0.81.1

This version was deleted from PyPI around 2024-08-11. Installing fails with:
$ pip3 install bttc==0.0.81.1 ERROR: Could not find a version that satisfies the requirement bttc==0.0.81.1
View other deleted versions of bttc

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/2024-08-10/ \ bttc==0.0.81.1
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Or, download files manually

And install manually via pip:
bttc-0.0.81.1-py3-none-any.whl (121.1KB)
bttc-0.0.81.1.tar.gz (86.0KB)