Method _ray_from_modified_class

python/ray/actor.py:1504–1570

(
        cls,
        modified_class,
        class_id,
        actor_options,
    )

    @classmethod
    def _ray_from_modified_class(
        cls,
        modified_class,
        class_id,
        actor_options,
    ):
        for attribute in [
            "remote",
            "_remote",
            "_ray_from_modified_class",
            "_ray_from_function_descriptor",
        ]:
            if hasattr(modified_class, attribute):
                logger.warning(
                    "Creating an actor from class "
                    f"{modified_class.__name__} overwrites "
                    f"attribute {attribute} of that class"
                )

        # Make sure the actor class we are constructing inherits from the
        # original class so it retains all class properties.
        class DerivedActorClass(cls, modified_class):
            def __init__(self, *args, **kwargs):
                try:
                    cls.__init__(self, *args, **kwargs)
                except Exception as e:
                    # Delegate call to modified_class.__init__ only
                    # if the exception raised by cls.__init__ is
                    # TypeError and not ActorClassInheritanceException(TypeError).
                    # In all other cases proceed with raise e.
                    if isinstance(e, TypeError) and not isinstance(
                        e, ActorClassInheritanceException
                    ):
                        modified_class.__init__(self, *args, **kwargs)
                    else:
                        raise e

        name = f"ActorClass({modified_class.__name__})"
        DerivedActorClass.__module__ = modified_class.__module__
        DerivedActorClass.__name__ = name
        DerivedActorClass.__qualname__ = name
        # Construct the base object.
        self = DerivedActorClass.__new__(DerivedActorClass)
        # Actor creation function descriptor.
        actor_creation_function_descriptor = PythonFunctionDescriptor.from_class(
            modified_class.__ray_actor_class__
        )

        actor_method_meta = _ActorClassMethodMetadata.create(
            modified_class,
            actor_creation_function_descriptor,
        )
        self.__ray_metadata__ = _ActorClassMetadata(
            Language.PYTHON,
            modified_class,
            actor_creation_function_descriptor,
            class_id,
            actor_method_meta,