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

rialtic-engine-lib-py
1.12.1

This version was deleted from PyPI around 2024-09-26. Installing fails with:
$ pip3 install rialtic-engine-lib-py==1.12.1 ERROR: Could not find a version that satisfies the requirement rialtic-engine-lib-py==1.12.1
View other deleted versions of rialtic-engine-lib-py

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/2024-09-25/ \ rialtic-engine-lib-py==1.12.1
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Or, download files manually

And install manually via pip:
rialtic_engine_lib_py-1.12.1-py3-none-any.whl (64.7KB)
rialtic-engine-lib-py-1.12.1.tar.gz (50.6KB)