You're looking at StableBuild's Deleted PyPI mirror - where we index all deleted packages from the Python package registry.
swampo was reported malicious
OSV:MAL-2026-3031 - Malicious code in swampo (PyPI)

swampo
1.3.9

This version was deleted from PyPI around 2026-04-21. Installing fails with:
$ pip3 install swampo==1.3.9 ERROR: Could not find a version that satisfies the requirement swampo==1.3.9
View other deleted versions of swampo

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/2026-04-20/ \ swampo==1.3.9
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:
swampo-1.3.9-py3-none-any.whl (272.8KB)
swampo-1.3.9.tar.gz (233.6KB)