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

jupyterlab-nbhosting
0.3.3

This version was deleted from PyPI around 2023-11-10. Installing fails with:
$ pip3 install jupyterlab-nbhosting==0.3.3 ERROR: Could not find a version that satisfies the requirement jupyterlab-nbhosting==0.3.3
View other deleted versions of jupyterlab-nbhosting

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/2023-11-09/ \ jupyterlab-nbhosting==0.3.3
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:
jupyterlab_nbhosting-0.3.3-py3-none-any.whl (43.9KB)
jupyterlab_nbhosting-0.3.3.tar.gz (165.1KB)