Python: Any use case for popitem()?

Question

If popitem removes an arbitrary (key, value) pair from a (non-ordered) dictionary, what is it used for? Could anyone provide an example for practical application?

Answer 1

'arbitrary' isn't true anymore since 3.7.

'Remove and return a (key, value) pair from the dictionary. Pairs are returned in LIFO order.

popitem() is useful to destructively iterate over a dictionary, as often used in set algorithms. If the dictionary is empty, calling popitem() raises a KeyError.

Changed in version 3.7: LIFO order is now guaranteed. In prior versions, popitem() would return an arbitrary key/value pair.'

https://docs.python.org/3/library/stdtypes.html#mapping-types-dict

Answer 2

HonFu Thanks! Is it also true for a non-ordered dictionary?