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

siena-mes
20.1

This version was deleted from PyPI around 2023-12-04. Installing fails with:
$ pip3 install siena-mes==20.1 ERROR: Could not find a version that satisfies the requirement siena-mes==20.1
View other deleted versions of siena-mes

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/2023-12-03/ \ siena-mes==20.1
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Or, download files manually

And install manually via pip:
siena_mes-20.1-py3-none-any.whl (8.2KB)
siena_mes-20.1.tar.gz (7.9KB)