[rat87]

The important thing is whether theres a garuntee of it happening in particular circumstance or not. Like with python referencing counting theoretically finalizers should be called after you lose all references to a file (assuming no cycles) but you cant rely on it.

Python dicts were in insert sort order for 3.6 but this only became a garuntee as opposed to an implementation choice that could be changed at anyvtime with python3.7