Python3.13 without GIL thread-safe for all thread-unsafe code?

[ArtemIsmagilov]

What is Thread Safety as applied to Python?

Removing the GIL does not make functions thread-safe. Thread-safety relates to this question: If you have a data structure (say, an object, or a list) that is being modified in one thread, can another thread come along and modify it right in the middle of that calculation? Let’s say you have a global variable x which equals 0, and two different threads attempt to increment it using this: x += 1 If incrementing is thread-safe, then you are guaranteed that the result can only be x=2 after the…