Luckily being compatible with Python 3 doesn’t mean replacing code wholesale, with it being possible to modify Python 2.6 code onwards to a form that is also compatible with a Python 3 interpreter.

In 2014, under Python Enhancement Proposal (PEP) 466, Python developers decided to backport the OpenSSL ssl module from Python 3.4 to Python 2.7, despite 2.7 already being a maintenance release.

An experimental ‘no-GIL’ build mode in Python 3.13 disables the Global Interpreter Lock to enable true parallel execution in Python. Here’s where to start.