In CPython, the global interpreter lock, or GIL, is a mutex that prevents multiple native threads from executing Python bytecodes at once. This lock is necessary mainly because CPython’s memory management is not thread-safe. (However, since the GI...
The reason you might want to create a circularly linked list is if you want the ability to go backward through a list but don’t want the extra overhead of creating a doubly linked list. You can move backward through a circularly linked list by mov...