The _PyObject_SetManagedDict() function is private, not documented, and not tested.

It's used by _PyObject_SetDict() which belongs to the internal C API and is not exported.

A code search in PyPI top 15,000 projects did not find any project using it.

The function was added by commit 8b541c0.

@DinoV: Did you add this function to the public C API on purpose?

cc @colesbury who modified the function.

Well, let me remove this function. It can be added back easily if things go wrong.

It's used by _PyObject_SetDict() which belongs to the internal C API and is not exported.

See also #139852 discussion about _PyObject_GetDictPtr() and maybe adding an idea to set the dictionary.