For those of you too lazy to read, this is the most important part of the article.
"The first is "python3-dateutil," which imitated the popular "dateutil" library. The second is "jeIlyfish" (the first L is an I), which mimicked the "jellyfish" library."
So check and make sure you have not accidentally used these libraries.
Good thing I barely ever use python so I'm not affected :D