The CARES reinforcement learning bed used as the foundation for RL related projects.

Motivation

Reinforcement Learning Algorithms (that is to say, how the Neural Networks are updated) stay the same no matter the application. This package is designed so that these algorithms are only programmed once and can be "plugged & played" into different environments.

Usage

Consult the repository wiki for a guide on how to use the package

Installation Instructions

If you want to utilise the GPU with Pytorch install CUDA first - https://developer.nvidia.com/cuda-toolkit

Install Pytorch following the instructions here - https://pytorch.org/get-started/locally/

git clone the repository into your desired directory on your local machine

Run pip3 install -r requirements.txt in the root directory of the package

To make the module globally accessible in your working environment run pip3 install --editable . in the project root

Running an Example

This package serves as a library of specific RL algorithms and utility functions being used by the CARES RL team. For an example of how to use this package in your own environments see the example gym packages below that use these algorithms for training agents on a variety of simulated and real-world tasks.

Gym Environments

We have created a standardised general purpose gym that wraps the most common simulated environments used in reinforcement learning into a single easy to use place: https://github.com/UoA-CARES/gymnasium_envrionments

This package contains wrappers for the following gym environments:

Deep Mind Control Suite

The standard Deep Mind Control suite: https://github.com/google-deepmind/dm_control

OpenAI Gymnasium

The standard OpenAI Gymnasium: https://github.com/Farama-Foundation/Gymnasium

Game Boy Emulator

Environment running Gameboy games utilising the pyboy wrapper: https://github.com/UoA-CARES/pyboy_environment

Gripper Gym

The gripper gym contains all the code for training our dexterous robotic manipulators: https://github.com/UoA-CARES/gripper_gym

F1Tenth Autonomous Racing

The Autonomous F1Tenth package contains all the code for training our F1Tenth platforms to autonomously race: https://github.com/UoA-CARES/autonomous_f1tenth

Package Structure

cares_reinforcement_learning/
├─ algorithm/
├─ encoders/
│  ├─ autoencoder.py
│  ├─ ...
├─ policy/
│  │  ├─ TD3.py
│  │  ├─ ...
│  ├─ value/
│  │  ├─ DQN.py
│  │  ├─ ...
├─ memory/
│  ├─ prioritised_replay_buffer.py
├─ networks/
│  ├─ DQN/
│  │  ├─ network.py
│  ├─ TD3.py/
│  │  ├─ actor.py
│  │  ├─ critic.py
│  ├─ ...
├─ util/
│  ├─ network_factory.py
│  ├─ ...

algorithm: contains update mechanisms for neural networks as defined by the algorithm.

encoders: contains the implementations for various autoencoders and variational autoencoders

memory: contains the implementation of various memory buffers - e.g. Prioritised Experience Replay

networks: contains standard neural networks that can be used with each algorithm

util: contains common utility classes

Encoders

An autoencoder consists of an encoder that compresses input data into a latent representation and a decoder that reconstructs the original data from this compressed form. Variants of autoencoders, such as Variational Autoencoders (VAEs) and Beta-VAEs, introduce probabilistic elements and regularization techniques to enhance the quality and interpretability of the latent space. While standard autoencoders focus on reconstruction accuracy, advanced variants like Beta-VAE and Squared VAE (SqVAE) aim to improve latent space disentanglement and sparsity, making them valuable for generating more meaningful and structured representations.

We have re-implemented a range of autoencoder/variational-autoencoder methodologies for use with the RL algorithms implemented within this library. For more information on the encoders available in this package, please refer to the README in the encoders folder. These algorithms can be used stand-alone beyond their use here for RL.

Utilities

CARES RL provides a number of useful utility functions and classes for generating consistent results across the team. These utilities should be utilised in the new environments we build to test our approaches.

Record.py

The Record class allows data to be saved into a consistent format during training. This allows all data to be consistently formatted for plotting against each other for fair and consistent evaluation.

All data from a training run is saved into the directory specified in the CARES_LOG_BASE_DIR environment variable. If not specified, this will default to '~/cares_rl_logs'.

You may specify a custom log directory format using the CARES_LOG_PATH_TEMPLATE environment variable. This path supports variable interpolation such as the algorithm used, seed, date etc. This defaults to "{algorithm}/{algorithm}-{domain_task}-{date}/{seed}" so that each run is saved as a new seed under the algorithm and domain-task pair for that algorithm.

The following variables are supported for log path template variable interpolation:

• algorithm
• domain
• task
• domain_task: The domain and task or just task if domain does not exist
• gym
• seed
• date: The current date in the YY_MM_DD-HH-MM-SS format
• run_name: The run name if it is provided, otherwise "unnamed"
• run_name_else_date: The run name if it is provided, otherwise the date

This folder will contain the following directories and information saved during the training session:

├─ <log_path>
|  ├─ env_config.py
|  ├─ alg_config.py
|  ├─ train_config.py
|  ├─ data
|  |  ├─ train.csv
|  |  ├─ eval.csv
|  ├─ figures
|  |  ├─ eval.png
|  |  ├─ train.png
|  ├─ models
|  |  ├─ model.pht
|  |  ├─ CHECKPOINT_N.pht
|  |  ├─ ...
|  ├─ videos
|  |  ├─ STEP.mp4
├─ ...

plotting.py

The plotting utility will plot the data contained in the training data based on the format created by the Record class. An example of how to plot the data from one or multiple training sessions together is shown below.

Plot the results of a single training instance

python3 plotter.py -s ~/cares_rl_logs -d ~/cares_rl_logs/ALGORITHM/ALGORITHM-TASK-YY_MM_DD:HH:MM:SS

Plot and compare the results of two or more training instances

python3 plotter.py -s ~/cares_rl_logs -d ~/cares_rl_logs/ALGORITHM_A/ALGORITHM_A-TASK-YY_MM_DD:HH:MM:SS ~/cares_rl_logs/ALGORITHM_B/ALGORITHM_B-TASK-YY_MM_DD:HH:MM:SS

Running 'python3 plotter.py -h' will provide details on the plotting parameters and control arguments.

python3 plotter.py -h

configurations.py

Provides baseline data classes for environment, training, and algorithm configurations to allow for consistent recording of training parameters.

RLParser.py

Provides a means of loading environment, training, and algorithm configurations through command line or configuration files. Enables consistent tracking of parameters when running training on various algorithms.

NetworkFactory.py

A factory class for creating a baseline RL algorithm that has been implemented into the CARES RL package.

MemoryFactory.py

A factory class for creating a memory buffer that has been implemented into the CARES RL package.

Supported Algorithms

Algorithm	Observation Space	Action Space	Paper Reference
DQN	Vector	Discrete	DQN Paper
DoubleDQN	Vector	Discrete	DoubleDQN Paper
DuelingDQN	Vector	Discrete	DuelingDQN Paper
SACD	Vector	Discrete	SAC-Discrete Paper
-----------	--------------------------	------------	---------------
PPO	Vector	Continuous	PPO Paper
DDPG	Vector	Continuous	DDPG Paper
TD3	Vector	Continuous	TD3 Paper
SAC	Vector	Continuous	SAC Paper
PERTD3	Vector	Continuous	PERTD3 Paper
PERSAC	Vector	Continuous	PERSAC Paper
PALTD3	Vector	Continuous	PALTD3 Paper
LAPTD3	Vector	Continuous	LAPTD3 Paper
LAPSAC	Vector	Continuous	LAPSAC Paper
LA3PTD3	Vector	Continuous	LA3PTD3 Paper
LA3PSAC	Vector	Continuous	LA3PSAC Paper
MAPERTD3	Vector	Continuous	MAPERTD3 Paper
MAPERSAC	Vector	Continuous	MAPERSAC Paper
RDTD3	Vector	Continuous	WIP
RDSAC	Vector	Continuous	WIP
REDQ	Vector	Continuous	REDQ Paper
TQC	Vector	Continuous	TQC Paper
CTD4	Vector	Continuous	CTD4 Paper
-----------	--------------------------	------------	---------------
NaSATD3	Image	Continuous	In Submission
TD3AE	Image	Continuous	TD3AE Paper
SACAE	Image	Continuous	SACAE Paper