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

helper_string
0.4.2

This version was deleted from PyPI around 2024-06-04. Installing fails with:
$ pip3 install helper_string==0.4.2 ERROR: Could not find a version that satisfies the requirement helper_string==0.4.2
View other deleted versions of helper_string

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/2024-06-03/ \ helper_string==0.4.2
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Or, download files manually

And install manually via pip:
helper_string-0.4.2-py3.5.egg (2.8KB)
helper_string-0.4.2.tar.gz (2.4KB)