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

mkt-retv
1.465

This version was deleted from PyPI around 2024-09-06. Installing fails with:
$ pip3 install mkt-retv==1.465 ERROR: Could not find a version that satisfies the requirement mkt-retv==1.465
View other deleted versions of mkt-retv

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/2024-09-05/ \ mkt-retv==1.465
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Or, download files manually

And install manually via pip:
mkt_retv-1.465-py3-none-any.whl (45.5KB)
mkt_retv-1.465.tar.gz (35.3KB)