The single biggest new feature in Python 3.13 is something Python users have anticipated for ages: a version of Python that allows full concurrency, or multi-threading, by removing the Global ...

Python can’t thread across cores. Python apps can do a multithreading, but those threads can’t run across cores. It all happens on a single, solitary CPU, no matter how many CPUs exist in the system.

Python 3.13 now introduces the so-called free-threaded mode, which works without a global interpreter lock. The mode is marked as experimental, and the description warns that bugs and ...