You're looking at StableBuild's Deleted PyPI mirror - where we index all deleted packages from the Python package registry.
aiotrans was reported malicious
OSV:MAL-2024-9938 - Malicious code in aiotrans (PyPI)

aiotrans
1.0.0rc2

This version was deleted from PyPI around 2024-08-15. Installing fails with:
$ pip3 install aiotrans==1.0.0rc2 ERROR: Could not find a version that satisfies the requirement aiotrans==1.0.0rc2
View other deleted versions of aiotrans

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/2024-08-14/ \ aiotrans==1.0.0rc2
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Or, download files manually

And install manually via pip:
aiotrans-1.0.0rc2-py3-none-any.whl (5.5KB)
aiotrans-1.0.0rc2.tar.gz (3.4KB)