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

rtml-core
0.2.1

This version was deleted from PyPI around 2024-01-07. Installing fails with:
$ pip3 install rtml-core==0.2.1 ERROR: Could not find a version that satisfies the requirement rtml-core==0.2.1
View other deleted versions of rtml-core

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/2024-01-06/ \ rtml-core==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:
rtml_core-0.2.1-py3-none-any.whl (4.8KB)
rtml_core-0.2.1.tar.gz (3.9KB)