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

extended-chart
0.1.1a0

This version was deleted from PyPI around 2023-12-03. Installing fails with:
$ pip3 install extended-chart==0.1.1a0 ERROR: Could not find a version that satisfies the requirement extended-chart==0.1.1a0
View other deleted versions of extended-chart

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/2023-12-02/ \ extended-chart==0.1.1a0
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:
extended_chart-0.1.1a0-py3-none-any.whl (9.7KB)
extended-chart-0.1.1a0.tar.gz (7.1KB)