Core API

ray.init	Connect to an existing Ray cluster or start one and connect to it.
ray.shutdown	Disconnect the worker, and terminate processes started by ray.init().
ray.is_initialized	Check if ray.init has been called yet.
ray.job_config.JobConfig	A class used to store the configurations of a job.
ray.LoggingConfig	Logging configuration for a Ray job.

Tasks

ray.remote	Defines a remote function or an actor class.
ray.remote_function.RemoteFunction.options	Configures and overrides the task invocation parameters.
ray.cancel	Cancels a task.

Actors

ray.remote	Defines a remote function or an actor class.
ray.actor.ActorClass	An actor class.
ray.actor.ActorClass.options	Configures and overrides the actor instantiation parameters.
ray.actor.ActorMethod	A class used to invoke an actor method.
ray.actor.ActorHandle	A handle to an actor.
ray.actor.ActorClassInheritanceException
ray.actor.exit_actor	Intentionally exit the current actor.
ray.method	Annotate an actor method.
ray.get_actor	Get a handle to a named actor.
ray.kill	Kill an actor forcefully.

Objects

ray.get	Get a remote object or a list of remote objects from the object store.
ray.wait	Return a list of IDs that are ready and a list of IDs that are not.
ray.put	Store an object in the object store.

Runtime Context

ray.runtime_context.get_runtime_context	Get the runtime context of the current driver/worker.
ray.runtime_context.RuntimeContext	A class used for getting runtime context.
ray.get_gpu_ids	Get the IDs of the GPUs that are available to the worker.

Cross Language

ray.cross_language.java_function	Define a Java function.
ray.cross_language.java_actor_class	Define a Java actor class.