pyrealsense2
2.55.1.6470
This version was deleted from PyPI around 2024-04-21. Installing fails with:
$ pip3 install pyrealsense2==2.55.1.6470
ERROR: Could not find a version that satisfies the requirement pyrealsense2==2.55.1.6470

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/2024-04-20/ \
pyrealsense2==2.55.1.6470
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: