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Try Ray on Anyscale

Site Navigation

  • Get Started

  • Use Cases

  • Example Gallery

  • Library

    • Ray CoreScale general Python applications

    • Ray DataScale data ingest and preprocessing

    • Ray TrainScale machine learning training

    • Ray TuneScale hyperparameter tuning

    • Ray ServeScale model serving

    • Ray RLlibScale reinforcement learning

  • Docs

  • Resources

    • Discussion ForumGet your Ray questions answered

    • TrainingHands-on learning

    • BlogUpdates, best practices, user-stories

    • EventsWebinars, meetups, office hours

    • Success StoriesReal-world workload examples

    • EcosystemLibraries integrated with Ray

    • CommunityConnect with us

Try Ray on Anyscale
  • Overview
  • Getting Started
  • Installation
  • Use Cases
    • Ray for ML Infrastructure
  • Example Gallery
  • Ecosystem
  • Ray Core
    • Key Concepts
    • User Guides
      • Tasks
        • Nested Remote Functions
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      • Actors
        • Named Actors
        • Terminating Actors
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        • Utility Classes
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      • Objects
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      • Fault Tolerance
        • Task Fault Tolerance
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        • Node Fault Tolerance
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      • Design Patterns & Anti-patterns
        • Pattern: Using nested tasks to achieve nested parallelism
        • Pattern: Using generators to reduce heap memory usage
        • Pattern: Using ray.wait to limit the number of pending tasks
        • Pattern: Using resources to limit the number of concurrently running tasks
        • Pattern: Using asyncio to run actor methods concurrently
        • Pattern: Using an actor to synchronize other tasks and actors
        • Pattern: Using a supervisor actor to manage a tree of actors
        • Pattern: Using pipelining to increase throughput
        • Anti-pattern: Returning ray.put() ObjectRefs from a task harms performance and fault tolerance
        • Anti-pattern: Calling ray.get in a loop harms parallelism
        • Anti-pattern: Calling ray.get unnecessarily harms performance
        • Anti-pattern: Processing results in submission order using ray.get increases runtime
        • Anti-pattern: Fetching too many objects at once with ray.get causes failure
        • Anti-pattern: Over-parallelizing with too fine-grained tasks harms speedup
        • Anti-pattern: Redefining the same remote function or class harms performance
        • Anti-pattern: Passing the same large argument by value repeatedly harms performance
        • Anti-pattern: Closure capturing large objects harms performance
        • Anti-pattern: Using global variables to share state between tasks and actors
        • Anti-pattern: Serialize ray.ObjectRef out of band
      • Ray Compiled Graph
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        • Miscellaneous Topics
        • Authenticating Remote URIs in runtime_env
        • Lifetimes of a User-Spawn Process
    • Examples
      • Simple AutoML for time series with Ray Core
      • Batch Prediction with Ray Core
      • A Gentle Introduction to Ray Core by Example
      • Using Ray for Highly Parallelizable Tasks
      • A Simple MapReduce Example with Ray Core
      • Monte Carlo Estimation of π
      • Simple Parallel Model Selection
      • Parameter Server
      • Learning to Play Pong
      • Speed up your web crawler by parallelizing it with Ray
    • Ray Core API
      • Core API
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  • Ray Data
    • Overview
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    • Examples
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    • Ray Data Internals
  • Ray Train
    • Overview
    • PyTorch Guide
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    • More Frameworks
      • Hugging Face Accelerate Guide
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    • User Guides
      • Data Loading and Preprocessing
      • Configuring Scale and GPUs
      • Configuring Persistent Storage
      • Monitoring and Logging Metrics
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      • Experiment Tracking
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      • Handling Failures and Node Preemption
      • Reproducibility
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    • Examples
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    • Ray Train API
  • Ray Tune
    • Getting Started
    • Key Concepts
    • User Guides
      • Running Basic Experiments
      • Logging and Outputs in Tune
      • Setting Trial Resources
      • Using Search Spaces
      • How to Define Stopping Criteria for a Ray Tune Experiment
      • How to Save and Load Trial Checkpoints
      • How to Configure Persistent Storage in Ray Tune
      • How to Enable Fault Tolerance in Ray Tune
      • Using Callbacks and Metrics
      • Getting Data in and out of Tune
      • Analyzing Tune Experiment Results
      • A Guide to Population Based Training with Tune
        • Visualizing and Understanding PBT
      • Deploying Tune in the Cloud
      • Tune Architecture
      • Scalability Benchmarks
    • Ray Tune Examples
      • Examples using Ray Tune with ML Frameworks
        • Keras Example
        • PyTorch Example
        • PyTorch Lightning Example
        • Ray RLlib Example
        • XGBoost Example
        • LightGBM Example
        • Horovod Example
        • Hugging Face Transformers Example
      • Tune Experiment Tracking Examples
        • Weights & Biases Example
        • MLflow Example
        • Aim Example
        • Comet Example
      • Tune Hyperparameter Optimization Framework Examples
        • Ax Example
        • HyperOpt Example
        • Bayesopt Example
        • BOHB Example
        • Nevergrad Example
        • Optuna Example
      • Other Examples
      • Exercises
    • Ray Tune FAQ
    • Ray Tune API
      • Tune Execution (tune.Tuner)
      • Tune Experiment Results (tune.ResultGrid)
      • Training in Tune (tune.Trainable, train.report)
      • Tune Search Space API
      • Tune Search Algorithms (tune.search)
      • Tune Trial Schedulers (tune.schedulers)
      • Tune Stopping Mechanisms (tune.stopper)
      • Tune Console Output (Reporters)
      • Syncing in Tune (train.SyncConfig)
      • Tune Loggers (tune.logger)
      • Tune Callbacks (tune.Callback)
      • Environment variables used by Ray Tune
      • External library integrations for Ray Tune
      • Tune Internals
      • Tune CLI (Experimental)
  • Ray Serve
    • Getting Started
    • Key Concepts
    • Develop and Deploy an ML Application
    • Deploy Compositions of Models
    • Deploy Multiple Applications
    • Model Multiplexing
    • Configure Ray Serve deployments
    • Set Up FastAPI and HTTP
    • Production Guide
      • Serve Config Files
      • Deploy on Kubernetes
      • Custom Docker Images
      • Add End-to-End Fault Tolerance
      • Handle Dependencies
      • Best practices in production
    • Monitor Your Application
    • Resource Allocation
    • Ray Serve Autoscaling
    • Advanced Guides
      • Pass Arguments to Applications
      • Advanced Ray Serve Autoscaling
      • Performance Tuning
      • Dynamic Request Batching
      • Updating Applications In-Place
      • Development Workflow
      • Set Up a gRPC Service
      • Experimental Java API
      • Deploy on VM
      • Run Multiple Applications in Different Containers
    • Architecture
    • Examples
    • Ray Serve API
  • Ray RLlib
    • Getting Started with RLlib
    • Key Concepts
    • Environments
    • Algorithms
    • User Guides
      • Advanced Python APIs
      • Models, Preprocessors, and Action Distributions
      • Saving and Loading your RL Algorithms and Policies
      • How To Customize Policies
      • Episodes
      • Replay Buffers
      • Working With Offline Data
      • Catalog (Alpha)
      • RL Modules (Alpha)
      • Learner (Alpha)
      • Using RLlib with torch 2.x compile
      • Fault Tolerance And Elastic Training
      • Install RLlib for Development
    • Examples
    • RLlib’s new API stack
    • New API stack migration guide
    • Ray RLlib API
      • Algorithms
        • ray.rllib.algorithms.algorithm_config.AlgorithmConfig
        • ray.rllib.algorithms.algorithm_config.AlgorithmConfig.copy
        • ray.rllib.algorithms.algorithm_config.AlgorithmConfig.validate
        • ray.rllib.algorithms.algorithm_config.AlgorithmConfig.freeze
        • ray.rllib.algorithms.algorithm_config.AlgorithmConfig.build
        • ray.rllib.algorithms.algorithm_config.AlgorithmConfig.build_learner_group
        • ray.rllib.algorithms.algorithm_config.AlgorithmConfig.build_learner
        • ray.rllib.algorithms.algorithm_config.AlgorithmConfig.callbacks
        • ray.rllib.algorithms.algorithm_config.AlgorithmConfig.debugging
        • ray.rllib.algorithms.algorithm_config.AlgorithmConfig.environment
        • ray.rllib.algorithms.algorithm_config.AlgorithmConfig.evaluation
        • ray.rllib.algorithms.algorithm_config.AlgorithmConfig.experimental
        • ray.rllib.algorithms.algorithm_config.AlgorithmConfig.fault_tolerance
        • ray.rllib.algorithms.algorithm_config.AlgorithmConfig.framework
        • ray.rllib.algorithms.algorithm_config.AlgorithmConfig.multi_agent
        • ray.rllib.algorithms.algorithm_config.AlgorithmConfig.offline_data
        • ray.rllib.algorithms.algorithm_config.AlgorithmConfig.python_environment
        • ray.rllib.algorithms.algorithm_config.AlgorithmConfig.reporting
        • ray.rllib.algorithms.algorithm_config.AlgorithmConfig.resources
        • ray.rllib.algorithms.algorithm_config.AlgorithmConfig.rl_module
        • ray.rllib.algorithms.algorithm_config.AlgorithmConfig.rollouts
        • ray.rllib.algorithms.algorithm_config.AlgorithmConfig.training
        • ray.rllib.algorithms.algorithm_config.AlgorithmConfig.get_default_learner_class
        • ray.rllib.algorithms.algorithm_config.AlgorithmConfig.get_default_rl_module_spec
        • ray.rllib.algorithms.algorithm_config.AlgorithmConfig.get_evaluation_config_object
        • ray.rllib.algorithms.algorithm_config.AlgorithmConfig.get_multi_rl_module_spec
        • ray.rllib.algorithms.algorithm_config.AlgorithmConfig.get_multi_agent_setup
        • ray.rllib.algorithms.algorithm_config.AlgorithmConfig.get_rollout_fragment_length
        • ray.rllib.algorithms.algorithm_config.AlgorithmConfig.validate_train_batch_size_vs_rollout_fragment_length
        • ray.rllib.algorithms.algorithm.Algorithm
        • ray.rllib.algorithms.algorithm.Algorithm.setup
        • ray.rllib.algorithms.algorithm.Algorithm.get_default_config
        • ray.rllib.algorithms.algorithm.Algorithm.compute_actions
        • ray.rllib.algorithms.algorithm.Algorithm.compute_single_action
        • ray.rllib.algorithms.algorithm.Algorithm.evaluate
        • ray.rllib.algorithms.algorithm.Algorithm.from_checkpoint
        • ray.rllib.algorithms.algorithm.Algorithm.from_state
        • ray.rllib.algorithms.algorithm.Algorithm.get_weights
        • ray.rllib.algorithms.algorithm.Algorithm.set_weights
        • ray.rllib.algorithms.algorithm.Algorithm.export_model
        • ray.rllib.algorithms.algorithm.Algorithm.export_policy_checkpoint
        • ray.rllib.algorithms.algorithm.Algorithm.export_policy_model
        • ray.rllib.algorithms.algorithm.Algorithm.restore
        • ray.rllib.algorithms.algorithm.Algorithm.restore_workers
        • ray.rllib.algorithms.algorithm.Algorithm.save
        • ray.rllib.algorithms.algorithm.Algorithm.save_checkpoint
        • ray.rllib.algorithms.algorithm.Algorithm.train
        • ray.rllib.algorithms.algorithm.Algorithm.training_step
        • ray.rllib.algorithms.algorithm.Algorithm.add_policy
        • ray.rllib.algorithms.algorithm.Algorithm.remove_policy
      • Environments
        • BaseEnv API
        • MultiAgentEnv API
        • VectorEnv API
        • ExternalEnv API
        • SingleAgentEpisode API
        • Env Utils
      • Policy API
        • ray.rllib.policy.policy.Policy
        • ray.rllib.policy.eager_tf_policy_v2.EagerTFPolicyV2
        • ray.rllib.policy.torch_policy_v2.TorchPolicyV2
        • ray.rllib.policy.torch_policy_v2.TorchPolicyV2.make_model
        • ray.rllib.policy.torch_policy_v2.TorchPolicyV2.make_model_and_action_dist
        • ray.rllib.policy.eager_tf_policy_v2.EagerTFPolicyV2.make_model
        • ray.rllib.policy.policy.Policy.compute_actions
        • ray.rllib.policy.policy.Policy.compute_actions_from_input_dict
        • ray.rllib.policy.policy.Policy.compute_single_action
        • ray.rllib.policy.torch_policy_v2.TorchPolicyV2.action_sampler_fn
        • ray.rllib.policy.torch_policy_v2.TorchPolicyV2.action_distribution_fn
        • ray.rllib.policy.torch_policy_v2.TorchPolicyV2.extra_action_out
        • ray.rllib.policy.eager_tf_policy_v2.EagerTFPolicyV2.action_sampler_fn
        • ray.rllib.policy.eager_tf_policy_v2.EagerTFPolicyV2.action_distribution_fn
        • ray.rllib.policy.eager_tf_policy_v2.EagerTFPolicyV2.extra_action_out_fn
        • ray.rllib.policy.Policy.compute_gradients
        • ray.rllib.policy.Policy.apply_gradients
        • ray.rllib.policy.torch_policy_v2.TorchPolicyV2.extra_compute_grad_fetches
        • ray.rllib.policy.torch_policy_v2.TorchPolicyV2.extra_grad_process
        • ray.rllib.policy.eager_tf_policy_v2.EagerTFPolicyV2.grad_stats_fn
        • ray.rllib.policy.eager_tf_policy_v2.EagerTFPolicyV2.compute_gradients_fn
        • ray.rllib.policy.eager_tf_policy_v2.EagerTFPolicyV2.apply_gradients_fn
        • ray.rllib.policy.eager_tf_policy_v2.EagerTFPolicyV2.extra_learn_fetches_fn
        • ray.rllib.policy.Policy.learn_on_batch
        • ray.rllib.policy.Policy.load_batch_into_buffer
        • ray.rllib.policy.Policy.learn_on_loaded_batch
        • ray.rllib.policy.Policy.learn_on_batch_from_replay_buffer
        • ray.rllib.policy.Policy.get_num_samples_loaded_into_buffer
        • ray.rllib.policy.Policy.loss
        • ray.rllib.policy.Policy.compute_log_likelihoods
        • ray.rllib.policy.Policy.on_global_var_update
        • ray.rllib.policy.Policy.postprocess_trajectory
        • ray.rllib.policy.torch_policy_v2.TorchPolicyV2.optimizer
        • ray.rllib.policy.torch_policy_v2.TorchPolicyV2.get_tower_stats
        • ray.rllib.policy.eager_tf_policy_v2.EagerTFPolicyV2.optimizer
        • ray.rllib.policy.eager_tf_policy_v2.EagerTFPolicyV2.stats_fn
        • ray.rllib.policy.Policy.from_checkpoint
        • ray.rllib.policy.Policy.export_checkpoint
        • ray.rllib.policy.Policy.export_model
        • ray.rllib.policy.Policy.from_state
        • ray.rllib.policy.Policy.get_weights
        • ray.rllib.policy.Policy.set_weights
        • ray.rllib.policy.Policy.get_state
        • ray.rllib.policy.Policy.set_state
        • ray.rllib.policy.Policy.import_model_from_h5
        • ray.rllib.Policy.get_initial_state
        • ray.rllib.Policy.num_state_tensors
        • ray.rllib.Policy.is_recurrent
        • ray.rllib.policy.Policy.apply
        • ray.rllib.policy.Policy.get_session
        • ray.rllib.policy.Policy.init_view_requirements
        • ray.rllib.policy.Policy.get_host
        • ray.rllib.policy.Policy.get_exploration_state
        • ray.rllib.policy.torch_policy_v2.TorchPolicyV2.get_batch_divisibility_req
        • ray.rllib.policy.eager_tf_policy_v2.EagerTFPolicyV2.variables
        • ray.rllib.policy.eager_tf_policy_v2.EagerTFPolicyV2.get_batch_divisibility_req
      • Model APIs
        • ray.rllib.models.modelv2.ModelV2
        • ray.rllib.models.torch.torch_modelv2.TorchModelV2
        • ray.rllib.models.tf.tf_modelv2.TFModelV2
        • ray.rllib.models.modelv2.ModelV2.forward
        • ray.rllib.models.modelv2.ModelV2.value_function
        • ray.rllib.models.modelv2.ModelV2.last_output
        • ray.rllib.models.modelv2.ModelV2.get_initial_state
        • ray.rllib.models.modelv2.ModelV2.is_time_major
        • ray.rllib.models.modelv2.ModelV2.variables
        • ray.rllib.models.modelv2.ModelV2.trainable_variables
        • ray.rllib.models.distributions.Distribution
        • ray.rllib.models.modelv2.ModelV2.custom_loss
        • ray.rllib.models.modelv2.ModelV2.metrics
      • Catalog API
        • ray.rllib.core.models.catalog.Catalog
        • ray.rllib.core.models.catalog.Catalog.build_encoder
        • ray.rllib.core.models.catalog.Catalog.get_action_dist_cls
        • ray.rllib.core.models.catalog.Catalog.get_tokenizer_config
        • ray.rllib.core.models.catalog.Catalog.latent_dims
        • ray.rllib.core.models.catalog.Catalog._determine_components_hook
        • ray.rllib.core.models.catalog.Catalog._get_encoder_config
        • ray.rllib.core.models.catalog.Catalog._get_dist_cls_from_action_space
      • RLModule API
        • ray.rllib.core.rl_module.rl_module.RLModuleSpec
        • ray.rllib.core.rl_module.rl_module.RLModuleSpec.build
        • ray.rllib.core.rl_module.rl_module.RLModuleSpec.get_rl_module_config
        • ray.rllib.core.rl_module.rl_module.RLModuleConfig
        • ray.rllib.core.rl_module.rl_module.RLModuleConfig.to_dict
        • ray.rllib.core.rl_module.rl_module.RLModuleConfig.from_dict
        • ray.rllib.core.rl_module.rl_module.RLModuleConfig.get_catalog
        • ray.rllib.core.rl_module.multi_rl_module.MultiRLModuleSpec
        • ray.rllib.core.rl_module.multi_rl_module.MultiRLModuleSpec.build
        • ray.rllib.core.rl_module.multi_rl_module.MultiRLModuleSpec.get_multi_rl_module_config
        • ray.rllib.core.rl_module.rl_module.RLModule
        • ray.rllib.core.rl_module.rl_module.RLModule.as_multi_rl_module
        • ray.rllib.core.rl_module.rl_module.RLModule.forward_train
        • ray.rllib.core.rl_module.rl_module.RLModule.forward_exploration
        • ray.rllib.core.rl_module.rl_module.RLModule.forward_inference
        • ray.rllib.core.rl_module.rl_module.RLModule._forward_train
        • ray.rllib.core.rl_module.rl_module.RLModule._forward_exploration
        • ray.rllib.core.rl_module.rl_module.RLModule._forward_inference
        • ray.rllib.core.rl_module.rl_module.RLModule.input_specs_inference
        • ray.rllib.core.rl_module.rl_module.RLModule.input_specs_exploration
        • ray.rllib.core.rl_module.rl_module.RLModule.input_specs_train
        • ray.rllib.core.rl_module.rl_module.RLModule.output_specs_inference
        • ray.rllib.core.rl_module.rl_module.RLModule.output_specs_exploration
        • ray.rllib.core.rl_module.rl_module.RLModule.output_specs_train
        • ray.rllib.core.rl_module.rl_module.RLModule.get_state
        • ray.rllib.core.rl_module.rl_module.RLModule.set_state
        • ray.rllib.core.rl_module.rl_module.RLModule.save_to_path
        • ray.rllib.core.rl_module.rl_module.RLModule.restore_from_path
        • ray.rllib.core.rl_module.rl_module.RLModule.from_checkpoint
        • ray.rllib.core.rl_module.multi_rl_module.MultiRLModule
        • ray.rllib.core.rl_module.multi_rl_module.MultiRLModule.setup
        • ray.rllib.core.rl_module.multi_rl_module.MultiRLModule.as_multi_rl_module
        • ray.rllib.core.rl_module.multi_rl_module.MultiRLModule.add_module
        • ray.rllib.core.rl_module.multi_rl_module.MultiRLModule.remove_module
        • ray.rllib.core.rl_module.multi_rl_module.MultiRLModule.save_to_path
        • ray.rllib.core.rl_module.multi_rl_module.MultiRLModule.restore_from_path
      • LearnerGroup API
        • ray.rllib.algorithms.algorithm_config.AlgorithmConfig.resources
        • ray.rllib.algorithms.algorithm_config.AlgorithmConfig.rl_module
        • ray.rllib.algorithms.algorithm_config.AlgorithmConfig.training
        • ray.rllib.algorithms.algorithm_config.AlgorithmConfig.build_learner_group
        • ray.rllib.core.learner.learner_group.LearnerGroup
      • Sampling the Environment or offline data
        • ray.rllib.evaluation.rollout_worker.RolloutWorker
        • ray.rllib.evaluation.rollout_worker.RolloutWorker.add_policy
        • ray.rllib.evaluation.rollout_worker.RolloutWorker.remove_policy
        • ray.rllib.evaluation.rollout_worker.RolloutWorker.get_policy
        • ray.rllib.evaluation.rollout_worker.RolloutWorker.set_is_policy_to_train
        • ray.rllib.evaluation.rollout_worker.RolloutWorker.set_policy_mapping_fn
        • ray.rllib.evaluation.rollout_worker.RolloutWorker.for_policy
        • ray.rllib.evaluation.rollout_worker.RolloutWorker.foreach_policy
        • ray.rllib.evaluation.rollout_worker.RolloutWorker.foreach_policy_to_train
        • ray.rllib.evaluation.rollout_worker.RolloutWorker.get_filters
        • ray.rllib.evaluation.rollout_worker.RolloutWorker.get_global_vars
        • ray.rllib.evaluation.rollout_worker.RolloutWorker.set_global_vars
        • ray.rllib.evaluation.rollout_worker.RolloutWorker.get_host
        • ray.rllib.evaluation.rollout_worker.RolloutWorker.get_metrics
        • ray.rllib.evaluation.rollout_worker.RolloutWorker.get_node_ip
        • ray.rllib.evaluation.rollout_worker.RolloutWorker.get_weights
        • ray.rllib.evaluation.rollout_worker.RolloutWorker.set_weights
        • ray.rllib.evaluation.rollout_worker.RolloutWorker.get_state
        • ray.rllib.evaluation.rollout_worker.RolloutWorker.set_state
        • ray.rllib.evaluation.rollout_worker.RolloutWorker.lock
        • ray.rllib.evaluation.rollout_worker.RolloutWorker.unlock
        • ray.rllib.evaluation.rollout_worker.RolloutWorker.sample
        • ray.rllib.evaluation.rollout_worker.RolloutWorker.sample_with_count
        • ray.rllib.evaluation.rollout_worker.RolloutWorker.sample_and_learn
        • ray.rllib.evaluation.rollout_worker.RolloutWorker.learn_on_batch
        • ray.rllib.evaluation.rollout_worker.RolloutWorker.setup_torch_data_parallel
        • ray.rllib.evaluation.rollout_worker.RolloutWorker.compute_gradients
        • ray.rllib.evaluation.rollout_worker.RolloutWorker.apply_gradients
        • ray.rllib.evaluation.rollout_worker.RolloutWorker.foreach_env
        • ray.rllib.evaluation.rollout_worker.RolloutWorker.foreach_env_with_context
        • ray.rllib.evaluation.rollout_worker.RolloutWorker.stop
        • ray.rllib.evaluation.rollout_worker.RolloutWorker.apply
        • ray.rllib.evaluation.rollout_worker.RolloutWorker.sync_filters
        • ray.rllib.evaluation.rollout_worker.RolloutWorker.find_free_port
        • ray.rllib.evaluation.rollout_worker.RolloutWorker.creation_args
        • ray.rllib.evaluation.rollout_worker.RolloutWorker.assert_healthy
        • ray.rllib.env.env_runner.EnvRunner
        • ray.rllib.env.env_runner_group.EnvRunnerGroup
        • ray.rllib.env.env_runner_group.EnvRunnerGroup.stop
        • ray.rllib.env.env_runner_group.EnvRunnerGroup.reset
        • ray.rllib.env.env_runner_group.EnvRunnerGroup.add_workers
        • ray.rllib.env.env_runner_group.EnvRunnerGroup.foreach_worker
        • ray.rllib.env.env_runner_group.EnvRunnerGroup.foreach_worker_with_id
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ray.data.block.BlockAccessor.select#

BlockAccessor.select(columns: List[str | None]) → pyarrow.Table | pandas.DataFrame[source]#

Return a new block containing the provided columns.

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