This Output Makes No Sense: Why adding __getitem__ breaks your object's state unexpect

Añadido: 2026-05-06

[00:00:00]My adding get item breaks your object state unexpectedly. Let's look at the bug. Here is the buggy code. Look carefully. The bug is that get item overrides the cache on every access, losing previous state. Python calls get item on every access. So, if you mutate state unconditionally there, you corrupt internal data structures. Here is the correct fix. Master dunder methods before your next fan ground.