Function _shadowed_dict_from_weakref_mro_tuple

Lib/inspect.py:1718–1734

(*weakref_mro)

@functools.lru_cache()
def _shadowed_dict_from_weakref_mro_tuple(*weakref_mro):
    for weakref_entry in weakref_mro:
        # Normally we'd have to check whether the result of weakref_entry()
        # is None here, in case the object the weakref is pointing to has died.
        # In this specific case, however, we know that the only caller of this
        # function is `_shadowed_dict()`, and that therefore this weakref is
        # guaranteed to point to an object that is still alive.
        entry = weakref_entry()
        dunder_dict = _get_dunder_dict_of_class(entry)
        if '__dict__' in dunder_dict:
            class_dict = dunder_dict['__dict__']
            if not (type(class_dict) is types.GetSetDescriptorType and
                    class_dict.__name__ == "__dict__" and
                    (class_dict.__objclass__ is object or
                     class_dict.__objclass__ is entry)):
                return class_dict
    return _sentinel


def _shadowed_dict(klass):