Despite Python 3.6 reaching end-of-life just 3 weeks ago[0], the amount of projects depending on older versions of Python 3 is exorbitant. Whilst working on a part of my media library workflow I found myself in need of using an old stalled project based on Python 3.4. Sadly, the code does not execute properly in newer runtimes and no one has ever undertook the task of refactoring it. Therefore, users are forced to run it with 3.4 version interpreter.