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

demo-1-sdk
1.1.0

This version was deleted from PyPI around 2024-01-31. Installing fails with:
$ pip3 install demo-1-sdk==1.1.0 ERROR: Could not find a version that satisfies the requirement demo-1-sdk==1.1.0
View other deleted versions of demo-1-sdk

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/2024-01-30/ \ demo-1-sdk==1.1.0
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:
demo_1_sdk-1.1.0-py3-none-any.whl (16.9KB)
demo-1-sdk-1.1.0.tar.gz (10.1KB)